Liquid Accumulation Research Articles

A parametric numerical study on the performance of polymer electrolyte membrane fuel cell with intermediate‐blocked interdigitated flow field designs

AbstractFlow field design is crucial for achieving higher performance in polymer electrolyte membrane fuel cells (PEMFCs). This study uses a two‐phase, multi‐component, and three‐dimensional model to simulate the performance of PEMFCs that use interdigitated flow field design with intermediate blocks on the cathode side. A detailed parametric study is presented to investigate the effects of various geometric and operational parameters. Of the parameters studied, inlet mass flow rate, relative humidity, and rib width had the greatest impact on cell performance. The results show that increasing the cathode stoichiometric ratio resulted in higher fuel cell performance for blocked interdigitated designs compared to parallel designs. In addition, using cathode channels with higher height values resulted in lower PEMFC performance for all flow fields. Higher values of rib/channel width ratio resulted in lower cell performance due to liquid water accumulation in the rib regions. However, at higher rib/channel width ratios, the positive effect of using interdigitated flow designs was more pronounced. Moreover, at a low relative humidity of RH = 25%, a 10.4% higher performance was obtained for the interdigitated type II compared to cases with RH = 100%, due to more effective over‐rib convection and higher water removal.

Study on prediction model of liquid holdup based on back propagation neural network optimized by tuna swarm algorithm

ABSTRACT It is unavoidable that there will be liquid accumulation in the low-lying areas of the pipelines during the operation of wet gas pipelines. The existence of liquid accumulation can generate a variety of safety issues and, in extreme circumstances, accidents. The accurate calculation of liquid holdup in gas-liquid two-phase flow is of great significance for the study of flow pattern identification, pressure drop calculation, pigging cycle determination, hydrate prediction, wax deposition prediction, pipeline corrosion evaluation and prediction, and transportation efficiency calculation of gas pipelines. Therefore, it is crucial to predict the liquid holdup of wet gas pipelines. 2141 independent experimental data samples were collected and screened out from literatures. Based on the gray theory, gray relation analysis was carried out on the influencing factors of liquid holdup, and the factors with greater influence were selected as the influencing variables; the liquid holdup prediction model based on tuna swarm algorithm optimized BP neural network was established, with pipe diameter, inclination angle, apparent gas velocity, apparent liquid velocity, average temperature, average pressure, and liquid viscosity as input parameters, and liquid holdup as output parameter. Liquid holdup was predicted for upward inclined, downward inclined, and horizontal pipelines respectively. The results show that the prediction model of liquid holdup established in this paper has high accuracy, with the MAPE value of 5.3223%, RMSE value of 0.0213, and R 2 value of 0.9924 for upward inclined pipelines; the MAPE value of 10.1859%, RMSE value of 0.0174, and R 2 value of 0.9922 for downward inclined pipelines; the MAPE value of 4.8037%, RMSE value of 0.0113, and R 2 value of 0.9974 for horizontal pipelines. The predicted results are generally stable and have a wider scope of application, providing a new idea and approach for predicting the liquid holdup of wet gas pipelines.

The Mutual Effect Study of Horizontal and Vertical Loads on the Elastic Tank Partially Filled with Liquid

Modern equipment elements in the energy, chemical industry, transport, aviation, and space engineering work under conditions of increased technological loads, at high temperatures and pressure levels. At the same time, the equipment is usually exposed to external loads of various natures. Hydroelastic phenomena must also be taken into account in designing and modernizing tanks and storage facilities for flammable and combustible substances. Flammable and combustible liquid accumulation leads to the increased environmental and fire hazard of such objects. The possible dangerous liquid leakage and tank depressurization negatively affect the surrounding area environment state. A fire in the tank is one of the most dangerous emergencies that could lead both to significant material and environmental damage and to human casualties. The paper treats the environmental hazards reducing problem from liquid hydrocarbon spills from storage tanks, which lead to destructive effects on all environment components especially during emergency situations. It has been established for sufficiently thin tank elastic walls, the fundamental frequency during coupled oscillations could be much lower than the frequency of the fluid in the shell with rigid walls. As the thickness of the tank wall increases, this effect becomes insignificant, and the lower oscillation frequency of the shell with liquid approaches the oscillation frequency of the liquid in a rigid tank. Parametric resonance and sub-resonance effects have been treated.

A novel salt and condensate–resistant foam co-stabilized by mixtures of surfactants and citric acid for gas well deliquification

Aged gas wells are often blocked by the accumulation of liquids, which can be removed by the injection of foaming surfactant mixtures. In this study, a compound foam stabilized by a quaternary mixture (alkyl amidoamine (amine), citric acid (acid), α–olefin sulfonate (AOS) and lauramidopropyl betaines (LAPB)) was firstly developed with the Waring blender method. The liquid unloading performance of this compound foam was then investigated to estimate its application potential under various condensate fraction, salinity and temperature conditions. At a condensate content range of 20 %–40 %, the amine/acid/AOS/LAPB foam is particularly effective in unloading the liquids. However, salinity was found to reduce the foaming efficiency (referred to as the ratio of the mass of the formed foam to that of the original liquid) and liquid unloading performance of the amine/acid/AOS/LAPB foam, which could be overcome through the addition of a chelator, namely nitrilotriacetic acid trisodium salt (NTA). Temperatures higher than 60 °C enhanced the performance of the amine/acid/AOS/LAPB foam. Synergistic effects within the quaternary mixture were confirmed by surface tension measurements, morphological observation, interaction energy calculation and the electrostatic potential analysis. The present results suggested that the amine/acid/AOS/LAPB mixture may be of use in relieving liquid loading of gas wells.

Horizontal Gas Well Liquid Accumulation State Determination based on Ensemble Learning Algorithm

With the depletion of reservoir energy, liquid accumulation in horizontal wells of the Sulige gas field has become an increasingly severe issue. This study proposes a GBDT algorithm-based predictive model using pure on-site data mining, which overcomes the limitations of traditional models in considering complex wellbore structures and the coupling effects of multiphase flow. Through an analysis of the liquid accumulation state in 25 gas wells in the block, the model achieves an accuracy of 84% in determining the wellbore liquid status, demonstrating higher accuracy compared to traditional models. It provides a more accurate prediction method for addressing gas well liquid accumulation issues.

Identification and maximum impact force modeling investigation for critical slugging in underwater compressed gas energy storage systems

Underwater compressed gas (air, natural gas, hydrogen, etc.) energy storage (UWCGES) is an emerging technology that is suitable for ocean energy storage. Liquid accumulation in gas transmission pipelines can be a significant obstacle in UWCGES systems. In this study, an experimental investigation is conducted to improve the understanding of the kinematics of liquid accumulation. A pressure signal is used for identifying the state of fluid flow in the pipe. Seven kinds of time-domain features are selected through monotonicity. An adaptive evaluation method for slug flow is proposed. The fused features are submitted as a Gaussian distribution through Box-Cox transformation (BCT), and ± 3 sigma criterion is set as the threshold range to adaptively identify slug flow. Beyond this, a maximum impact force model is established and the largest impact force produced during slugging is predicted. It is found that the inlet velocity, followed by the inclination angle of the pipe and the volume of liquid accumulation, most notably influences the impact force. The model and results have the potential to be further developed for remote monitoring of liquid accumulation in pipelines, which is important for UWCGES systems.

Influence of rectangular substrate chamfer on edge bead effect of a spin-coated thin film

Spin coating is a common method for fabricating thin films. The edge bead effect is a major contributor to thin film non-uniformities. This study investigates the influence of chamfer angles and widths of a rectangular substrate on the edge bead formation mechanism in spin-coated films. Through the use of volume-of-fluid simulations and experiments, it was determined that the chamfer angle had a significant impact on the edge bead effect, while the chamfer width was not found to be a major factor. The use of a synchronous chamber in spin coating was found to negatively affect film planarization by restricting solvent evaporation and elevating its concentration, leading to a decreased film thickness. Additionally, the study concluded that the edge effect is not impacted by the Bernoulli effect or liquid accumulation along the edge if the average film thickness is below 1500 nm. The main reason for reducing the height of the edge bead was determined to be liquid fusion at the edge of the substrate, which only occurred when the chamfer width was close to the film thickness.

Failure analysis of the sewage pipeline on a shale gas platform

The wall thickness of the sewage pipeline on a shale gas platform is seriously reduced. In order to explore the specific reasons for the pipeline failure, this paper carried out analysis by means of macroscopic inspection, mechanical property test, chemical composition analysis of base metal and corrosion product analysis. The analysis results show that the site of this pipeline corroded most seriously is at 5 o ′clock and 12 o ′clock near the outlet, and the corrosion of liquid accumulation containing CO2 is the main reason for the serious failure of the inner wall of this pipeline. This paper explores the specific reasons for the failure of the sewage pipeline on a shale gas platform, and provides a reference for the corrosion prevention of the sewage pipeline.

HHV-7 Encephalitis: The Rare Infection and Its Outcome on a Child (P11-10.006)

<h3>Objective:</h3> The primary aims of this study were to relate HHV-7 infection with clinical manifestations of encephalitis, transient hip synovitis and hepatic changes in childhood and to evidence the effectiveness of early diagnosis and treatment in patients with encephalitis. <h3>Background:</h3> A 2-year-old male patient reported persistent high fever, coughing and rhinorrhea starting 1 week ago. They sought outpatient pediatric care and was prescribed ceftriaxone and prednisolone, with no satisfactory response. The symptoms evolved to vomiting and dehydration. During the physical exam, he showed irritation, with constant cervical stiffness and hyperextension, photophobia, and convergent strabismus. On arrival, he had been taking ceftriaxone, acyclovir and desloratadine. Laboratory tests were very altered in leukocytes, platelets, PCR, AST, ALT and GGT. During the ophthalmologic examination, a paresis of cranial nerve VI on the right was identified as secondary to a probable meningitis. After 21 days of treatment with acyclovir, the patient had a good prognosis, however, he had claudication upon movement of the left hip. <h3>Design/Methods:</h3> NA <h3>Results:</h3> The CSF results were colorless, cloudy, pH 8, Glucose 58, Leukocytes 40, Proteins 81. To confirm this observation, the molecular panel detected the presence of HHV-7. The imaging tests helped and added to the results of the blood count and CSF. Cranial MRI showed a hyperintensity in the FLAIR sequence of the perimesencephalic subarachnoid space and small accumulation of liquid. In addition, the abdomen CT found a bit of fluid in the hip region. <h3>Conclusions:</h3> Encephalitis is an inflammation of the brain parenchyma that leads to neurological dysfunction caused by infection or autoimmunity. In this occasion, the patient had a rare case of HHV-7 encephalitis. Basically, the treatment was carried out with acyclovir and ketoprofen, obtaining a progressive improvement of the clinical picture. Consequently, further research on the complications of HHV-7 is essential to develop a good characterization of this disease. <b>Disclosure:</b> Mr. Andrade has nothing to disclose. Miss MARQUES has nothing to disclose. Dr. Mota has nothing to disclose.

Mathematical Model of the pH Control System in an In Vitro Model of the Gastrointestinal Tract of Poultry

Introduction. Essential nonlinearity of the chemical reactions of acids and bases determines the control algorithms in the mode of acidification or alkalization, that is, periodic dosing of a minimum volume of acid or alkali. Such regulation may be ineffective, specifically, it allows insufficient or excessive concentration of the controlled substance. The article discusses the problem of precise regulation of the hydrogen index in mini-bioreactors. It is proposed to use a digital model of the acidity control system to select the concentrations of topped-up solutions, determine the regulation methodology, and improve accuracy. The objective of the work is the assurance of required accuracy of pH regulation in an in vitro mini-model of the gastrointestinal tract of a static type.Materials and Methods. The initial block diagram of the model included accumulators and flows. It was the base for the main differential equations characterizing the change in volume and acidity. To correct the acidity readings of the resulting solution by temperature, a static model based on the polynomial approximation of experimental data using the least squares method was created. The structural elements of the mathematical model were investigated in the Matlab Simulink application package. To validate the adequacy of the mathematical model, transient characteristics were determined on a real system of in vitro modeling of the artificial gastrointestinal tract of poultry.Results. Within the framework of this work, the authors created and analyzed a nonlinear mathematical model of pH changes in a bioreactor taking into account external control actions. The flows of hydrochloric acid solution, alkali solution and drain from the reactor were presented as elements of a differential equation describing the accumulation of liquid in the reactor. To improve the accuracy, the solution was modified taking into account the temperature dependence of the hydrogen index. A dosing mathematical model based on a regulator with alkali and acid channels was proposed. The data obtained made it possible to generate a combined model of the pH regulation process in the bioreactor. The adequacy of the solution was confirmed empirically. The models of pH regulator, regulation of the volume of contents in the reactor and chemical reactions were shown in the form of structural diagrams. The transients of a mathematical model and a real control system were compared. It was established that the transient characteristics of the mathematical model and the real system were identical in terms of regulation time. The relative error of regulation of the real system was 0.35 %, and the mathematical model — 0.1 %, which corresponded to the required accuracy of regulation ± 0.1 pH. The influence of the studied flows on the neutralization reaction was shown in the form of graphs.Discussion and Conclusions. The proposed mathematical model will provide selecting optimal methods and algorithms for regulating acidity, which will accelerate the creation of a regulator for the nonlinear process of regulating the hydrogen index. In the future, these developments can be integrated into a comprehensive digital model of the entire artificial gastrointestinal tract of poultry to optimize control algorithms (dosing, mixing, periodicity, etc.), as well as approximation to objects in vivo.

Study of drop mobility over a surface having electric charge gradient

Though different methodologies like thermal and magnetic fields have been tried to control a droplet's mobility in biochemical and medical applications, charge imprinted super-amphiphobic surface is the recent and promising development in which droplets can be transported through any predefined path over the surface. Such surfaces are electrified by impacting water droplets from varying release heights through triboelectrification. Impacting droplets on pillared surface dynamics of the same have been analyzed to understand the nature of electrostatic charge distribution generated. Further to this, droplet actuation on such surfaces with surface charge gradient has been simulated. Charge separation inside the liquid droplet and charge accumulation near the interface has been visualized to understand the phenomenon. Asymmetry in droplet shape and charge distribution has been analyzed as the reason behind the droplet actuation. The effect of different charge density gradients and surface wettability over droplet mobility has also been studied.

Analysis of volatile compounds production kinetics: A study of the impact of nitrogen addition and temperature during alcoholic fermentation.

Among the different compounds present in the must, nitrogen is an essential nutrient for the management of fermentation kinetics, also playing a major role in the synthesis of fermentative aromas. Fermentation temperature is yet another variable that affects fermentation duration and the production of fermentative aromas in wine. The main objective of this study was thus to evaluate the combined effects of nitrogen addition-at the start of the fermentation process or during the stationary phase-at different fermentation temperatures on both fermentation kinetics and aroma synthesis kinetics. To study the impact of these three parameters simultaneously, we used an innovative transdisciplinary approach associating an online GC-MS system with an original modeling approach: a Box-Behnken experimental design combined with response surface modeling and GAM modeling. Our results indicated that all three factors studied had significant effects on fermentation and aroma production kinetics. These parameters did not impact in the same way the different families of volatile compounds. At first, obtained data showed that reduction of ester accumulation in the liquid phase at high temperature was mainly due to important losses by evaporation but also to modifications of yeast metabolic capabilities to synthetize these compounds. In a noticeable way, optimal temperature changed for liquid accumulation of the two classes of esters-23°C for acetate ester and 18°C for ethyl esters-because biological impact of temperature was different for the two chemical families. Moreover, the study of these three factors simultaneously allowed us to show that propanol is not only a marker of the presence of assimilable nitrogen in the medium but above all a marker of cellular activity. Finally, this work enabled us to gain a deeper understanding of yeast metabolism regulation. It also underlines the possibility to refine the organoleptic profile of a wine by targeting the ideal combination of fermentation temperature with initial and added nitrogen concentrations. Such observation was particularly true for isoamyl acetate for which interactions between the three factors were very strong.

Advances in Gas Well Fluid Accumulation Modeling

Liquid accumulation at the bottom of a well is an important cause of production reduction or even shutdown of natural gas wells, and it is inevitable that water-bearing formations generate liquid accumulation when producing natural gas. Therefore, it is important to study gas well liquid accumulation models and identify liquid accumulation at the bottom of a well in order to take timely and reasonable process measures to deal with liquid accumulation at the well. Based on this, this paper analyzes the current status of domestic and international research on gas well critical fluid-carrying droplet models and critical fluid-carrying film models through literature research, analyzes the problems and development trends of research on gas well fluid accumulation prediction, and provides a comprehensive and systematic summary of the progress of gas well fluid accumulation model research.

Phase transformations in pipeline gas transportation and methods to prevent emerging complications

The current methods for prevention of problems in gas gathering, field preparation and transportation systems, as a rule, do not consider the joint effect of such processes as gas flow in the pipeline in case of phase transitions, accumulation of liquid in the pipeline cavity, heat exchange of the pipeline with the surrounding environment. The studies assessed the barodynamic factors and the component composition of gas, affecting hydrate formation, taking into account the complex effect of the processes involved in the operation of gas pipelines. The technological solution for gas pipeline cleaning by specially developed polymeric gel composition is proposed.

Tubing Depth Optimization Study of Horizontal Well Drainage and Gas Production in WeiYuan Shale Gas Field

Timely production with a tube in shale gas wells can effectively ensure the stable decline of gas wells. However, there is no in-depth study on which position of tubing is the most favorable for the stable production of gas wells and whether the wellbore trajectory has an impact on this position. To determine the reasonable end of tubing (EOT), firstly, through the gas water flow experiment of the whole wellbore test device of a horizontal well, the characteristics of liquid accumulation in the test section and the liquid discharge at the outlet are analyzed. The results show, when the horizontal section inclines upward and the end of the tubing reaches 1/3 of the horizontal section, the gas flow carrying liquid is the smallest. Then, OLGA software is used to simulate the wellbore effusion in the production process of gas wells with different tubing depths under different wellbore trajectories. The results show when the horizontal section inclines upward and the end of the tubing arrives at 1/3 of the horizontal section, the cumulative production of the gas well is the largest. Based on comprehensive analysis, it is most favorable for horizontal shale gas wells when the end of the tubing is about 1/3 of the horizontal section.

Review of Oil–Water Flow Characteristics of Emptying by Water Displacing Oil in Mobile Pipelines

Water displacing oil is one of the main emptying methods for mobile pipelines. It has the advantages of being a simple process and highly safe. At present, the determination of a water displacing oil scheme of mobile pipelines is based on the oil–oil alternating transport theory of product oil pipelines. However, the insolubility of the oil phase and the water phase results in a great difference between the flow characteristics of water displacing oil and the oil–oil alternating transport of a product oil pipeline. In addition, due to the effect of buoyancy, the oil phase gathers at the high point of the pipeline and forms a liquid accumulation, which is difficult to carry away by water flow, resulting in the low emptying efficiency of the mobile pipeline. The essence of water displacing oil in a mobile pipeline is an oil–water two-phase unsteady displacement flow, involving liquid–liquid displacement flow, oil–water two-phase flow and water carrying oil. Aiming at such problems, domestic and foreign scholars have carried out a large number of theoretical and experimental studies, established the oil–water mixing model of water displacing oil and the relationship between macroscopic quantity (flow pattern, pressure drop and water content) and microscopic quantity (local flow field and droplet dispersion pattern, etc.) under each flow type, and explored the influence of pipeline diameter, oil phase velocity, pipeline inclination angle and other parameters on the capacity of carrying liquid accumulation. On this basis, this paper analyzes the shortcomings of the current research on the oil–water flow characteristics of water displacing oil in a mobile pipeline from three aspects: the formation mechanism of the oil–water mixture, displacing flow characteristics of immiscible fluids and flow characteristics of water carrying oil. Five future research directions are proposed, including the interface morphology and flow field characteristics of oil–water two-phase layered flow, local mixing characteristics of an oil–water two-phase dual continuous flow interface, droplet distribution and flow characteristics of oil–water two-phase dispersed flow, unsteady flow characteristics of the oil–water mixture of water displacing oil and oil accumulation and flow characteristics in topographic relief pipes.

Safety and reliability assessment of external corrosion defects assessment of buried pipelines—soil interface: A mechanisms and FE study

Due to local liquid accumulation (AL) in the low-lying section of the buried natural gas pipeline, external corrosion will occur at the interface between the pipeline and the soil. External corrosion will produce pit defects, which will reduce the bearing capacity of the pipeline and affect the normal operation of the pipeline. In addition, corrosion group defects can interact with each other. Thus, the service life of the pipeline is seriously affected. In this work, a case of local corrosion failure of the pipeline caused by liquid accumulation on-site is presented. The importance of this work is verified by experiment and field excavation. Besides, based on the Mises-Stress yield criterion, nonlinear analysis was carried out with the finite element method (FEM). The effects of internal pressure, corrosion pit defect size, internal and external wall corrosion, corrosion pit group, and different types of volumetric corrosion pit defects on the failure of L360QS steel pipe were analyzed with consideration of the effects of axial and circumferential zones of corrosion pits. These correlations have not been seen in previous studies. The FE results make up for the disadvantage that the corrosion is simplified to equal depth corrosion in the code, which will underestimate the residual strength of the actual corroded pipeline and lead to unnecessary repair or replacement. The results provide a reference for failure analysis and strength evaluation of buried L360QS steel pipe with corrosion defect.

Spatially Resolved Tomographic Assessment of Axial Mixing in Structured and Random Packings

AbstractThe liquid axial dispersion inside modern structured packings (Sulzer Mellapak™ 500.Y, Raschig Super‐Pak 350Y) and one random packing of the 4th generation (Raschig Super‐Ring 0.3) was measured by means of computed tomography. As the gas velocity is known to have little effect on the liquid axial dispersion at low hydraulic load, all experiments were conducted without countercurrent gas flow at liquid loads of B = 10, 15, and 20 m3m−2h−1 in a column with an inner diameter of 100 mm. Injection of the X‐ray‐active tracer potassium iodide allows the identification of active and passive liquid accumulations inside the structured packing. Good agreement was found between the active liquid holdup from tomographic images and the total holdup calculated from the mean residence time for the structured packings.

Determining local transport properties of gas diffusion layer land-channel regions via pore network modelling

Targeted, pre-determined values of spatially-resolved liquid water saturation is achieved in the pore networks of polymer electrolyte membrane (PEM) fuel cell gas diffusion layers (GDL). An inlet selection algorithm is presented, where the local saturation of the overall substrate, channel region, and land region match the prescribed input values (within a tolerance of 2% absolute error). With this algorithm, we conduct a novel, comprehensive characterization of the influence of local saturation on local oxygen transport properties using 1721 unique saturation conditions within the GDL. The oxygen transport properties of the GDL are significantly affected by the spatial distribution of liquid water. We find that liquid water accumulation in the channel region leads to an increase in the oxygen transport resistance in the channel region of the substrate and overall substrate. The channel region saturation is a better predictor of substrate transport properties than the substrate saturation alone. The correlation between the land region saturation and the oxygen transport resistance of the substrate is weak and depends on the spatial distribution of liquid water in the land region. Land region saturation only has a strong influence on the oxygen transport resistance in the land region of the substrate.

THERMOCATALYTIC DESTRUCTION OF POLYSTYRENE IN THE PRESENCE OF POTASSIUM POLYTITANATE

The thermocatalytic destruction of polystyrene under the action of quasi-amorphous potassium polytitanate (PPT), used as a new catalyst of the organic polymers destruction, has been studied. Thermal and thermocatalytic destruction of polystyrene was carried out at 450 °C in a reactor of an original design, which provides cracking of polymers under isothermal conditions and purging with an inert gas (nitrogen), as well as separation and accumulation of liquid and gaseous products. It has been established that the introduction of PPT powder into the polystyrene melt in an amount of 10 wt.% provides an increase in the yield of useful cracking products (gaseous and liquid hydrocarbons) by 15.5 wt.%. The yield of liquid hydrocarbons increases by 13.6 wt.%, and gaseous hydrocarbons by 1.9 wt.%. It is shown that, in comparison with the thermal cracking, an introduction of the PPT powder (10 wt.%} in the molten polymer increases the amount of liquid product (from 56.4 to 70.0 wt.%) and gaseous product (from 17.2 to 19.1 wt.%), whereas, the amount of undecomposed residue is reduced from 26.4 to 10.9 wt.%. It is found that a chemical composition of the products of the thermal and thermo-catalytic destruction of polystyrene differ significantly. Although aromatic hydrocarbons predominate in the composition of the distillate of the thermal destruction (about 80% of which are benzene and toluene), liquid products of the thermo-catalytic destruction contain 6.9% less aromatic compounds as well as a yield of olefins increases by 16.1%. The gaseous product of the thermal cracking is enriched with ethylene and isobutylene, and does not contain alkanes, while iso-butane appeares in the gaseous product of the thermocatalytic destruction and a yield of ethylene increases by 5.4 wt.%, propylene - by 10.5 wt.% and isobutylene - by 8.2 wt.%. A mechanism of the catalytic action of PPT is discussed. For citation: Zherdetsky N.A., Gorokhovsky A.V. Thermocatalytic destruction of polystyrene in the presence of potassium polytitanate. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2023. V. 66. N 3. P. 77-84. DOI: 10.6060/ivkkt.20236603.6759.