Pyrolysis Parameters Research Articles

Overcoming the trap of pyrolysis analyzes of hydrocarbon potential based on palynofacies analysis

Hydrocarbon generation of source rocks is controlled by both the source and evolution of organic matter (OM). Pyrolysis parameters are often used to reflect the hydrocarbon generation capacity. In Dongying sag, the ratio of hydrocarbon generation between the lower Es3 and upper Es4 submember is 1:3, but the pyrolysis parameters cannot accurately reflect this difference. The source, preservation and evolution of OM of the lacustrine mudrocks in the Dongying Sag were studied by palynofacies analysis. The palynofacies can be divided into five types (PF1 to PF5), among which PF5 and PF4 are rich in terrestrial plant tissue fragments and macrophytes fragments, respectively, with weak hydrocarbon generation ability. PF1, PF3 and PF2 are enriched in different types of amorphous organic matter (AOM), respectively. The first two types of OM assemblages are mainly preserved in rocks as particulates with a low degree of evolution, while PF2 is rich in spongy AOM, closely bound with minerals and highly evolved. Differences in preservation methods have affected the evolution of OM, which cannot be accurately reflected by pyrolysis parameters. Further comparing the OM composition each layer, it is found that source rocks in the middle Es3 submember are rich in PF4 and PF5 with weak hydrocarbon generation capacity, which are in line with a poor performance of pyrolysis parameters. The lower Es3 submember is enriched with “particulate” PF1 and PF3, the evolution degree of OM is low, while the upper Es4 is enriched with “mineral-bound” PF2 with higher OM maturation and higher hydrocarbon potential. In general, hydrocarbon generation potential of source rocks is jointly controlled by multiple factors including the source, preservation and evolution of OM. Comprehensive analysis combined with palynofacies and pyrolysis methods is needed to accurately judge the hydrocarbon generation capacity of source rocks.

Systematic optimization of biochars derived from corn wastes, pineapple leaf, and sugarcane bagasse for Cu(II) adsorption through response surface methodology

Many industrial wastewaters contain an appreciable amount of toxic copper (Cu(II)) that needs to be properly treated before discharging into receiving water body. Adsorption can effectively remove Cu(II) with optimized parameters. This study investigates the critical pyrolysis parameters of biochar derived from agricultural waste. Optimized biochar showed maximum Cu(II) adsorption capacity of 60.7, 36.8, and 35.5 mg g−1 by PLB, SBB, and CWB at pyrolysis temperatures of 555 ℃, 559 ℃, 507 ℃, respectively, compared with commercial activated carbon (CAC, 40.8 mg g−1). Surface characterization confirmed surface complexation, electrostatic interaction, and cation exchange capacity as Cu(II) removal mechanisms. The presence of humic acid reduced the Cu(II) removal of both CAC and optimized biochars. Optimized PLB displayed high reusability (87% Cu(II) removal efficiency) after five consecutive cycles using pressure cooker regeneration. With excellent Cu(II) adsorption capacity and reusability, the investigated biochars show high applicability potential to Cu(II)-laden wastewater treatment.

Thermo-kinetic analysis of pyrolysis of thermally pre-treated sewage sludge from the food industry

Due to the specific characteristics of sewage sludge from the food industry, including its high fat content, its treatment is quite complex. Therefore, in this study, the effect of the pre-treatment processes torrefaction (T) and hydrothermal carbonization (HTC) on the pyrolysis of industrial sewage sludge (SS) from the vegetable oil industry was investigated by thermogravimetric analysis. Kinetic and thermodynamic analysis was performed using the Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO), and Friedman (FRI) iso-conversional kinetic models. In addition, the influence of water replacement by whey in the hydrothermal carbonization process was investigated on the subsequent pyrolysis kinetics.The activation energy (Eα) values for pyrolysis of industrial sewage sludge ranged from 49 to 372 kJ/mol. Pre-treatment (torrefaction, hydrothermal carbonization) of sewage sludge increases the activation energy significantly: the Eα values for torrefied (T-SS) and hydrothermally treated (HTC-SS) samples ranged from 177 to 689 kJ/mol and from 161 to 486 kJ/mol, respectively. The variations in activation energy and the generally lower activation energies for the HTC-SSW sample (158–445 kJ/mol) indicate that the use of whey in the HTC process affects the hydrochar properties and subsequent pyrolysis kinetics significantly. According to the results, the pre-treatment of the samples is reflected in better thermochemical properties and stability of the treated samples, as well as in the thermodynamic parameters of pyrolysis, since the pre-treated samples (especially the torrefied sample, T-SS) exhibited higher entropies and enthalpies and lower Gibbs free energies.

Dolomite catalyst for fast pyrolysis of waste cooking oil into hydrocarbon fuel

Dolomite as the catalyst for pyrolysis of waste cooking oil (WCO) was investigated to produce hydrocarbon fuels. Optimization of pyrolysis parameters i.e. time, temperature and catalysts loading, achieved high selectivity of WCO to diesel hydrocarbon, compared to thermal pyrolysis that produced mainly carboxylic acids. Dolomite catalysed deoxygenation of fatty acid in WCO into hydrocarbon, consequently accelerating the pyrolysis time to 75 min. Bio-oil at 68.06% yield with 57.27% selectivity towards diesel and gasoline hydrocarbons was obtained at 450 °C while using 6% of dolomite. Dolomite exhibited partial phase separation into dolomite/CaCO3 mixtures within 15 min of pyrolysis, initiated by the generated CO2 during pyrolisis of WCO. The catalyst is stable for up to three reaction cycles suggesting the activity was achieved from the synergy between the dolomite/CaCO3 phases.

Critical insights into pyrolysis and co-pyrolysis of poplar and eucalyptus wood sawdust: Physico-chemical characterization, kinetic triplets, reaction mechanism, and thermodynamic analysis

Critical information on physico-chemical characterization, thermo-kinetics, and thermodynamic parameters for pyrolysis of lignocellulosic biomass are vital for safe and efficient design of biomass pyrolysis reactors. In the present investigation, physico-chemical characterization, pyrolysis and co-pyrolysis kinetics, and thermodynamic analysis of poplar wood (PW), eucalyptus wood (EW), and their binary blend (MW) were studied via TGA-thermograms obtained at 5, 10, and 20 °C/min under nitrogen atmosphere. The kinetic parameters were computed via model-fitting (inflection point and multiple linear regression) and model-free (OFW and KAS) methods. Both approaches predicted a different set of kinetic triplets where E-value from model-fitting (73.20 ± 1.57, 55.68 ± 1.34, 65.56 ± 1.18 kJ/mol for PW, EW, and MW) and model-free (173.86 ± 0.48, 210.53 ± 0.39, and 203.47 ± 0.23 kJ/mol for PW, EW, and MW) methods was predicted. Endothermicity, degree of stability, and energy barrier were found to be in the order of EW > MW > PW, EW > MW = PW, and EW = MW > PW, respectively. Further, behavior of pyrolysis reaction was established with the help of Criado method using Z(α) master plots. At initial conversion, diffusional processes predominate which was best described by D1 (1-D diffusion; Parabola law) and thereafter nuclei grew according to first- and third-order reaction models.

Prediction of mass loss and heat release rates measured in cone calorimeter experiments performed on glass fiber reinforced nylon 66 blended with red phosphorus

This work demonstrates an approach to building a burning model capable of predicting combustion behavior of multicomponent flame retardant (FR) materials. Glass fiber (GF) reinforced nylon 66 (PA) blended with red phosphorus (RP) with different material compositions were selected for this work. Cone calorimeter experiments at a radiant heat flux of 50 kWm−2 were conducted to measure the mass loss rates (MLR) and heat release rates (HRR) of each formulation. It was found that with 6% red phosphorus (by weight), the peak MLR and peak HRR measured in cone calorimeter experiments were reduced significantly by 45% and 60% compared to the sample without red phosphorus, respectively. Milligram-scale flame calorimeter (MFC) was also used to measure the HRR and to calculate the effective heats of combustion of gasified products for each formulation. The previously established pyrolysis parameter sets coupled with a flame heat feedback model and with effective heats of combustion of pyrolyzates obtained based on MFC and cone calorimeter experiments, were implemented into a numerical framework, ThermaKin2Ds, to predict the burning behavior. Both the MLR and HRR of PA/GF25 (without red phosphorus) and PA/GF-RP1.5 (1.5 wt% red phosphorus) were well-captured by the model. The model overestimated the MLR and HRR profiles for PA/GF-RP6.0 (6 wt% red phosphorus). Additional simulations were performed to account for the thin char layer formed above the sample during the experiments. It was concluded that this char layer mainly acted as a thermal barrier and its role as a gas barrier was minor. The developed burning model with the inclusion of this char layer captured the burning dynamics for this blend. Note that the model enables the prediction of burning behavior of FR blends as a function of material composition and heating condition.

Variations in microscopic properties of biomass char: Implications for biochar characterization

Biochar, a carbon-rich material produced during the thermochemical conversion of biomass, is considered to be an important material for environmental applications and sustainable agriculture. With interest in its use growing, it is essential to understand how pyrolysis parameters control biochar properties and, subsequently, which analytical methods can be applied effectively in characterizing biochar. While various methods are already in use, the potential of reflected light microscopy analysis has not yet been widely explored.This paper focuses on examining the microscopic properties of various biochars by implementing reflected light microscopy and assessing whether this technique has the potential to deliver quick, reliable, and essential information for biochar characterization. To support microscopic observations, selected physical (density and surface area) and chemical parameters (carbon and sulfur content, functional group distribution) of biochar samples were also determined.Megascopically and microscopically there is a considerable difference among biochars of different feeds including their size and shape, porosity, ratio of the abundance of cellular to non-cellular pores, inorganic matter content, the ratio of thick-walled to thin-walled inertinite, or the ratio between high-reflectance inertinite to low-reflectance inertinite and their reactivity. The biochars studied also showed variations in the oxygenated groups contribution, a wide range of carbon content (14.7 to 98.8%), density (1.45 to 2.47 g/cm3), and surface areas (from <1 to 363.6 m2/g).Our results demonstrate that microscopic characteristics and reflectance of biochar can provide crucial diagnostic value for predicting biochar properties and, in combination with other physical and chemical properties, help to enhance information about the biomass conversion process and potential practical use of biochar.

MODELING AND NON-LINEAR MECHANISMS IN HETEROGENEOUS KINETICS OF THE NON-ISOTHERMAL PYROLYSIS OR HYDROPYROLYSIS FOR TARFAYA OIL SHALE (MOROCCO)

The method of analysis to reach the kinetic parameters of pyrolysis or hydropyrolysis in non-isothermal (dynamic regime) has been often discussed to try to approach the reaction mechanisms. Indeed by modifying the method one makes these kinetic parameters vary considerably. Two mechanisms have been presented to discuss these non-isothermal kinetics for pyrolysis under nitrogen and hydropyrolysis under hydrogen, we have the linear mechanism and the non-linear mechanism.The method that was adopted for this work is the Coast-Redfern approximation (A.W.Coast and D.P.Redfern: 1964). We were able to achieve these kinetic parameters and design the appropriate mechanisms for the dynamic pyrolysis and hydropyrolysis of the Tarfaya oil shale (Morocco) for the Z4 layer. It turned out after discussion that it is the non-linear mechanism that fits best with pyrolysis as well as hydropyrolysis in non-isothermal mode. These two reactions are carried out by several simultaneous reactions with a fractional order for the first and an order equal to unity for the latter.

Recent Advances and Perspectives of Copyrolysis of Biomass and Organic Solid Waste

Pyrolysis is one of the substantial thermal conversion technologies for high-value reutilization of biomass and organic solid waste (OSW). Adding some typical OSWs to biomass pyrolysis can achieve directional regulation of target products that are considered potential alternatives to fossil energy. Understanding copyrolysis behaviors is vital for the optimizing pyrolysis process to minimize environmental pollution and efficiently utilize biomass and OSW. However, there is no overall review on the copyrolysis of biomass and various OSWs. This paper reviews and discusses recent advances in the copyrolysis mechanism, thermal–chemical processes of some typical OSWs and biomass, and effects of chemical compositions of raw materials and pyrolysis parameters on thermal–chemical conversion behaviors, synergistic effect, and copyrolysis product characteristics. Recent reports show that the synergistic effect in copyrolysis effectively improves the quality of bio-oil and biochar. Moreover, adding OSW to biomass pyrolysis can promote the secondary reaction of pyrolysis intermediates. The reaction mechanism and relative numerical simulation work of copyrolysis are summarized. Finally, the current challenges to energy- and environment-oriented conversion of biomass and OSW are discussed, and perspectives for further developing the copyrolysis process are highlighted. This paper provides valuable information for optimizing sustainable copyrolysis processes of OSW and biomass and improving the efficiency and selectivity of recycled OSW.

Influence of Process Parameters of Low-Temperature Rapeseed Oil Pyrolysis on the Yield and Quality of the Products

Influence of Process Parameters of Low-Temperature Rapeseed Oil Pyrolysis on the Yield and Quality of the Products

Pyrolysis in the Chemical Industry and Its Major Industrial Applications

Pyrolysis is an irreversible thermochemical treatment process of materials at elevated temperatures in an inert atmosphere. Pyrolysis is used heavily in the chemical industry to produce many forms of carbon and other chemicals from petroleum, coal, wood, oil shale, biomass or organic waste materials, and it is the basis of several methods for producing fuel from biomass. The end products of pyrolysis include solid residual coproducts and ash, noncondensable gases and condensable liquids. These products can be controlled by optimizing pyrolysis parameters such as temperature and residence time.

CHARACTERISTICS OF BIOCHAR PRODUCED FROM CELLULOSE FOR CAPTURE OF ATMOSPHERIC CO2"

"Biochar (BioC) production from biomass is attractive due to its low cost and relevant physicochemical characteristics. Within this context, the objective of the present work was to produce BioC from cellulose of Pinus elliotti, with different pyrolysis parameters, intended for use in CO2 adsorption from the atmosphere. As main results, the produced BioC presented a porous structure, with a fibrous characteristic, due to the raw material used (cellulose). Also, the biochar prepared at 800 °C (P800) presented higher specific surface area and total pore volume than that prepared at 600 °C (P600), due to the higher pyrolysis temperature applied. On the other hand, P600 presented a higher conversion of cellulose to BioC. Due to these characteristics, P800 presented greater ability to adsorb CO2. Thus, a potential use for BioC was identified in this work."

Thermal Behavior and Kinetics of Shenmu Coal Pyrolyzed under Hydrogen-Rich or Methane-Gas-Rich Atmosphere

The pyrolysis characteristics of Shenmu coal under an atmosphere containing H2 (40%) and another containing CH4 (40%) were studied via a thermogravimetric analysis, and the kinetic parameters of pyrolysis were calculated by using a distributed activation energy model (DAEM). The results showed that H2 promoted the cleavage of CH-like functional groups by providing reactive hydrogen groups to combine with CH groups and –OH groups in the coal. However, the H2 and CH4 atmosphere inhibits the cleavage of oxygen-containing functional groups such as carbonyl groups and C–O groups, and this is unfavorable to the production of CO2 and CO. The pyrolysis weight-loss rate of raw coal decreases with the increase of the heating rate, and the weight-loss curve shifts to the high-temperature region. At the same conversion rate and pyrolysis temperature, the activation energy of pyrolysis under the H2 and CH4 atmospheres is lower than that under the N2 atmosphere, and the activation energy does not conform to the Gaussian distribution. The activation energy of pyrolysis was distributed in a narrow range, in which the activation energy of the H2 and CH4 atmospheres was concentrated in the range of 175–215 kJ/mol and 225–230 kJ/mol, respectively, and the activation energy of the H2 atmosphere was lower than that of the CH4 atmosphere under the same conversion rate.

Thermal degradation behaviour and chemical kinetic characteristics of biomass pyrolysis using TG/DTG/DTA techniques

The goal of the current study is to investigate the thermal degradation of palm fronds (PF), olive leaves (OL), and wheat straw (WS) through pyrolysis and calculate their kinetic data using TG-DTG and DTA approaches. The kinetic parameters were assessed using isoconversional techniques like the Ozawa-Flynn-Wall (OFW) and Kissinger–Akahira–Sunose (KAS) methods, as well as model-fitting techniques like the integral method, which employs various diffusion and reaction order models. Using kinetics data models, typical parameters for pyrolysis and thermodynamics were estimated. For PF, OL, and WS, the values of activation energy (E) from the integral method ranged between 8.82 and 167.13, 23.06 and 149.20, and 11.01 and 156.27, respectively, for diffusion models. On the other hand, the values of (E) ranged between 22.3 and 117.49, 51.69 and 92.88, and 23.48 and 125.97, respectively, for reaction-order models. The average activation energies (E) calculated by using PF, OL, and WS samples are 91.9, 69.1, and 65.2, respectively, for the OFW method and 87.5, 101.8, and 63.4, respectively, for the KAS method. The results demonstrated that the integral method provided values of (E) that were almost identical to those produced by the KAS and OFW methods. In the same range of (α), results showed that reaction order models yielded greater frequency factor values than diffusion models, demonstrating how simpler and quicker pyrolysis is. The values of (ΔGav\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$${\\Delta \\mathrm{G}}_{av}$$\\end{document}) demonstrated the acceptability of these materials for pyrolysis, and for the OFW and KAS techniques, the sequence of the degradation process was OL > WS > PF. The calculated (ΔGav\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$${\\Delta \\mathrm{G}}_{av}$$\\end{document}) showed that more heat energies are required for OL, PF, and WS to dissociate the reagent bonds, which agrees with the (E) values derived from the OFW model.Graphical

Insights into wood species and aging effects on pyrolysis characteristics and combustion model by multi kinetics methods and model constructions

Considering the extensive application of wood materials in the construction and manufacturing, waste wood has potential of converting into new natural energy sources. In this study, cypress, pine and fir woods commonly used in China, as well as old samples for above each species (more than 200 years old) have been used to study the aging and species effects on their thermal stability and combustion models. To obtain the kinetic triplets of the pyrolysis process, all samples have been heated in a nitrogen atmosphere with heating rates of 5, 10, 15, and 20 K min−1. The kinetics parameters of pyrolysis throughout the conversion process were then calculated using isoconversional method, Coats-Redfern (CR), and masterplots methods. The reconstructed theoretical models have been then adjusted using the accommodation functions. The results of this study contribute to an increased understanding of the fire mechanism of waste woods, and implications concerning to provide scientific theoretical guidance for its feasibility as a new energy fuel more efficiently.

Fusion calorimetric experiments and QSPR modeling to inversely explore the accuracy of thermodynamic methods: A case study of the apparent activation energies of 18 aromatic nitro compounds

The choice of thermodynamic analysis method will directly affect the accuracy of thermal hazard assessment. In this work, two advanced calorimetric experiments were used to obtain the pyrolysis parameters of 18 aromatic nitro compounds under dynamic and adiabatic conditions, aiming at the inherent thermal risk and explosion characteristics of aromatic nitro compounds in important chemical processes. The multiple linear regression (MLR) and artificial neural network (ANN) models corresponding to six typical thermodynamic analysis methods (FWO, Kissinger, Starink, Friedman, Townsend, and TMRad) were constructed by using the apparent activation energy (Ea) calculated by fitting as the basic sample data and combining with quantitative structure-property relationship (QSPR). Two kinds of parameters in internal and external validation were used as the main indexes to judge the accuracy and reliability of different kinetic analysis methods applied to aromatic nitro compounds. This study is expected to provide theoretical support and technical guidance for the chemical industry in the thermal hazard assessment process of nitro compounds.

Oil Mobility of Low-Mature Lacustrine Shale and Controlling Factors: A Case Study from the Upper Cretaceous Nenjiang Formation, Gulong Sag, in the Songliao Basin

Producing low-mature shale oil resource is becoming economically available as in situ organic matter or heavy oil conversion technologies are introduced to shale oil production. However, we still lack suitable evaluation parameters and criteria for characterizing oil content and mobility in low-mature shales, which are very important for low-mature shale oil economic production. With the aim to better understand the influence factors for low-mature shale oil content and mobility, 16 shale core samples were collected from low-mature Upper Cretaceous Nenjiang Formation (K2n), Gulong Sag, in the Songliao Basin, to investigate their mineral composition and organic geochemical and pore characteristics. The results show the following: (1) Four shale lithofacies were identified, such as mudstone, carbonate lamina shale, bioclastic shale, and mixed lamina shale. (2) Shale oil mobility [represented by the oil saturation index (OSI)] was mainly controlled by large-sized pore distribution. (3) Total organic carbon (TOC) content and lithofacies had great influence on the distribution of oil mobility in the shale. As for mudstone and bioclastic shale, TOC played the most important role in controlling shale oil mobility, whereas for carbonate lamina shale and mixed lamina shale, TOC and mineral variation both have impacts on oil mobility. (4) The average contents of TOC, S1, and OSI in K2n were higher than those in the deeper Qingshankou shale. The oil mobility controlling factors in K2n and K2qn were both TOC and preservation conditions. (5) A new index was proposed to weigh the content of shale oil, in situ OSI, and multiple isothermal pyrolysis parameter S2-2. The in situ OSI shows that K2n has high oil retention capacity, and the in situ oil mobility is 2–3 times the movable oil content.

Exploration of the bioenergy potential of Dactyloctenium aegyptium through pyrolysis, kinetics, and thermodynamic parameters to produce clean fuels and biochemicals

The Egyptian grass (Dactyloctenium aegyptium) is a common low-cost coarse grass which is adapted to poor soils. The biomass of the Egyptian grass may be used to produce cleaner and sustainable fuels through pyrolysis without causing any contradictory impact on the land for food. It is profound to understand the thermochemical character of the Egyptian grass biomass for its efficient thermal conversion to clean fuels and chemicals. The current study elucidated the pyrolysis process of this biomass for the very first time based on the pyrolysis data. Heat-dried powdered biomass of Dactyloctenium aegyptium was pyrolyzed at 10 min−1, 30 min−1 and 50 °C min−1 in a simultaneous Thermogravimetry–Differential Scanning Calorimetry analyzer (TGA-DSC) under nitrogen atmosphere. Isoconversional models of Kissenger-Akahira-Sunose (KSA), Flynn–Wall–Ozawa (FWO) and first and second order reaction kinetics model were used to analyze the pyrolytic kinetic parameters. The pyrolysis of D. aegyptium grass biomass was shown to be a three-stage pyrolysis process where around 50 % of the product formation was happening within a narrow temperature range of 240–360 °C with the Activation energies ranged from 167 to 267 kJ mol−1 and thermodynamic parameters including 18.25–18.63 MJ kg−1 of high heating values, 169–177 kJ mol−1 of Gibb’s free energies, and 166–256 kJ mol−1 of reaction enthalpy have shown the outstanding pyrolysis and co-pyrolysis potential of Egyptian grass to produce clean fuels.

Optimization of process parameters for conventional pyrolysis of algal biomass into bio–oil and bio–char production

The current study involves the conventional pyrolysis of algal biomass under a batch fixed–bed reactor for the analysis of temperature, retention time, N2 flow rate on pyrolysis product yields Response Surface Methodology by Box–Behnken Design method was used for obtaining optimum parameters. The operating conditions were varied in the range of 450–575 °C, 30–60 min and 0.1–0.5 l/min, respectively. The regression model with 95% confidence level resulted in the high value of R2=98.42% with R2 adjusted=95.59% indicating excellent fit of the data to the model. A maximum yield of 20.1% (organic) + 20.62% (aqueous) by weight of bio–oil obtained at a pyrolysis temperature 575 °C, retention time 45 min and N2 flow rate 0.5 l/min. The Fourier transform infrared analysis study represents a reduction in the quantities of O–H (hydroxyl), CH (alkanes), CO (esters), CH (alkenes), and CO (primary alcohol) groups, under algal biomass at the expanding pyrolysis temperatures. The gas chromatography–mass spectroscopy investigation showed highest concentrations of 4–Methylpentanamide, n–Heptadecane, 2–Methyl naphthalene and n–Hexadecanoic acids in bio–oil.

Aromatics production from segmented co-pyrolysis of poplar sawdust and high-density polyethylene: Enhancing the synergistic effects

Catalytic co-pyrolysis of biomass and plastic waste is a promising approach for producing renewable biofuels and value-added chemicals. However, because of their different pyrolysis behaviors, the synergy between biomass and plastic is limited, and low-yield aromatics are produced. Herein, a modified segmented catalytic co-pyrolysis technology was proposed, and the effects of pyrolysis parameters were studied in detail to enhance the synergistic effect between feedstocks. For the biomass section (segment 1), catalytic fast pyrolysis (CFP) of poplar sawdust was conducted, and results showed that employing 15 wt% MgCl2 at 500 °C facilitated the production of furans. For the plastic section (segment 2), CFP of high-density polyethylene (HDPE) were performed. It was showed that instead of Y and beta zeolites, the utilization of ZSM-5 as a pyrolysis catalyst with a loading of ZSM-5/HDPE = 1.0, and a temperature of 600 °C was beneficial for the production of short-chain olefins. For the segmented co-pyrolysis of poplar sawdust and HDPE (segment 1 + segment 2), the biomass-to-plastic ratio was crucial in aromatics production. A ratio of 1:1 was found to be most effective in producing MAHs (54.8 area%), which was ∼3.9 or 1.6 times that for the separate CFP of biomass or HDPE. This was also consistent with its higher enhancement factor, confirming that the synergy between poplar sawdust and HDPE was dramatically enhanced. Finally, a segmented catalytic co-pyrolysis reaction pathway was proposed.