Oxygen Carrier Particles Research Articles

Kinetic model development and Bayesian uncertainty quantification for the complete reduction of Fe-based oxygen carriers with CH4, CO, and H2 for chemical looping combustion

Three kinetic models are developed and calibrated for the complete multi-step reduction of an Fe-based oxygen carrier (OC) particle with CH4, CO, and H2, using data from thermogravimetric analysis. The complete reduction rate profiles exhibit complex dynamics whose trajectory is significantly different depending on the reducing gas. A Bayesian model building and parameter estimation framework is applied for simultaneous parameter and model structure uncertainty quantification. The final models show excellent agreement between model predictions and calibration data, as well as new data not used for calibration (for the reduction of the OC with HC4). Parameter uncertainty is quantified by determining their joint posterior distribution, and model structure uncertainty is addressed by incorporating Gaussian process stochastic functions (represented by Bayesian smoothing splines) into the kinetic models. The final kinetic models with discrepancy functions are readily employable in equation-oriented simulation and optimization platforms.

Hydrogen and syngas production through dynamic chemical looping reforming-decomposition of methane

This work introduces CeZr0.5GdO4 spinel particles as novel oxygen carriers for use in the reforming and decomposition of methane into H2 and CO via the chemical looping technique. These particles were prepared by a modified sol-gel combustion method to increase their reactivity by increasing the surface area and consequently more accessibility of the gas feed to the solid phase. The performance of the synthesized materials was dynamically evaluated in terms of activity and stability at different operating temperatures (800–900 °C). The air used in the oxidation step eliminates almost all of the deposited solid carbon and converts it to CO, while providing the oxygen consumed in the reduction step. Oxygen carrier particles showed a conversion of more than 90% in all cycles after about 30 min of reduction operations. By the optimal operating path proposed in this research, more than 90% of the reactor exhaust gas is allocated to the production of H2 and CO with almost complete elimination of CO2 and H2O in a shorter period of time. This will also reduce the time required for coke gasification and lattice oxygen replenishment of the spinel. Finally, the CeZr0.5GdO4 proved to be a successful oxygen carrier for the continuous production of hydrogen and carbon monoxide with almost no remarkable reduction in activity during successive redox cycles.

Influences of reaction and thermal conditions on microstructural evolutions of ilmenite oxygen carriers for chemical looping combustion

Ilmenite ore has been widely accepted to be a cost-effective oxygen carrier (OC) of Chemical Looping Combustion (CLC) for CO2 capture. The focus of this study is to investigate into the influences of chemical impact, thermal variation and ageing effect on microstructure and performance evolutions of ilmenite OCs. Iron element migration, crystallinity and morphology alterations, and irreversible change of chemical composition were identified to be the major aspects responsible for gradual microstructural evolutions of Ilmenite OCs. Iron element migration from bulk materials to particle surface, occurring during the oxidation step of redox cycles, was of temperature- and O2 concentration- dependences. A schematic diagram was developed to explain the pathways of irreversible iron migration and alteration of chemical composition in redox cycle reactions. By lowering phase interaction between Fe2TiO5 and TiO2, the cycled thermal shock (due to reaction and processing in CLC) promotes the iron element concentration on OC particle surface and the ilmenite OC reactivity. Long-term ageing at elevated temperature, as one of typical severe conditions in CLC, exhibits activation effects for ilmenite OCs, even though it causes increased crystallinity, denser particle structure and redistribution of Fe2TiO5-TiO2 phase

CFD investigation of the in-situ gasification process of biomass in the chemical looping combustion system

At present, chemical looping combustion has emerged as a promising combustion technology for carbon capture. In this work, the gas-solid reactive flow in the biomass gasification of the fuel reactor of the chemical looping combustion system is numerically studied via the multiphase particle-in-cell approach under the Eulerian-Lagrangian framework. Regarding the model validation, the gaseous products numerically obtained quantitatively agree well with the experimental data in the literature. Then, the gas-solid reactive flow behaviour together with the effect of operating parameters are discussed. The results show that the non-uniform distribution of solid phase along the axial direction results from the size/density-induced segregation, which gives rise to the accumulation of oxygen carrier particles in the bottom and elutriation of biomass particles. The skewed distribution of biomass residence time in the fuel reactor can be observed. The smallest carbon content exists in the region close to the feeding port. Above the feeding position, the increase of carbon content but the decrease of biomass mass can be observed. Compared with oxygen carriers, biomass particles have a larger dispersion coefficient. Small content of CO and H2 appears while a wide range of CO2 exists in the dense region of the reactor.

Industry-scale production of a perovskite oxide as oxygen carrier material in chemical looping

How to upscale the production of oxygen carrier particles from laboratory level to industrial level is still challenging in the field of chemical looping. The upscaled oxygen carrier must maintain its physical and chemical properties. In the present contribution, a spray drying granulation protocol was developed to produce a perovskite oxygen carrier (CaMn0.5Ti0.375Fe0.125O3-δ) at an industrial scale. The micro-fluidized bed thermogravimetric (MFB-TGA) experiments were performed to measure the oxygen uncoupling and redox reaction kinetics under the fluidization state with enhanced heat and mass transfer, and the obtained experimental data at different temperatures were fitted by a fluidized-bed reactor coupled with a semi-empirical kinetic model. The physical and chemical properties of granulates were compared with those of the same perovskite composition prepared at the laboratory level. The results show the volume fraction of particle size at 75–500 μm is greater than 90% for the upscaled granulats, and the particles show no degradation in reactivity and no agglomeration for more than 20 redox cycles at high temperatures. The heterogeneous reaction rates are high, especially for the oxidation, e.g. it only spent ∼ 5 s to achieve full oxidation. Low attrition index of 3.74 wt% was found after the five-hour attrition test. The industrial-scale particles possess similar chemical and physical properties as the laboratory-scale particles with regards to the reaction kinetics, attrition index, crystalline phase, etc. The required bed inventories and fan energy consumption were finally estimated and found to be lower than other oxygen carriers reported in the literature.

Numerical study on collision and breakage characteristics of oxygen carrier particles in cold state in chemical looping combustion

Chemical looping combustion has become a promising combustion technology for its inherent advantage of CO2 separation. Oxygen carrier particles play a vital role in this technology, however, they usually suffered from serious attrition in the long-term operation. Due to large quantity of particles and the complex fluidization process, it is difficult to obtain particle collision characteristics by experimental study, and the existing fluid-solid flow model does not consider the particle breakage model. This study combined the convex polyhedral particle model and the Ab-T10 breakage model based on the Euler-Lagrange two-way coupling method to reveal the actual particle attrition process during fluidization. Comparison of particle size distribution between simulation and experimental results further verified the accuracy of the simulation model. The result shows that the average collision frequencies on the geometric surface of particles with sizes of 0.27, 0.3 and 0.33 mm are 740.9, 717.4, and 841.5 1/s, respectively. The average velocity and impact energy of particles have similar periodic variation, and with the progress of breakage, those two factors lead to the approximately normal distribution of particles with size between 60 and 240 μm.

Iron-based oxygen carrier particles produced from micronized size minerals or industrial wastes

The production of highly reactive oxygen carrier particles based on low-cost iron materials is explored for chemical looping processes. Ten different low-cost Fe-based materials in the micronized size, both minerals and industrial residues, have been tested as precursors of oxygen carrier particles. The redox reactivity of each of the materials is evaluated and compared to the state-of-the art with particulate materials, including one new material introduced in this work. Due to its excellent reactivity, Promifer material was used to produce oxygen carrier particles by pelletizing and granulation. Considering a trade-off between crushing strength and reactivity, pelletizing process was selected. This material calcined at 950 °C showed high reactivity with CH4. If a higher operating temperature was required, e.g. 1000 °C with solid fuels, the reactivity decreased. Low attrition rates and good fluid-dynamic behavior with the pelletized particles, without agglomeration along the redox cycles, were found in a fluidized bed reactor.

Double adjustment of Co and Sr in LaMnO3+δ perovskite oxygen carriers for chemical looping steam methane reforming

As a key factor for chemical looping steam methane reforming, the oxygen carrier with high quality is essential. In this work, both high reactivity and coking resistance of the La1−xSrxMn1−yCoyO3+δ oxygen carriers are achieved by double adjustment of Co and Sr. The redox tests and characterization results showed that the introduction of cobalt provided surface active sites to accelerate the activation of methane on the surface, and the Sr doping increased the oxygen vacancies which facilitated the migration of oxygen anion in the bulk of the oxygen carrier particles. The doping of Co and Sr can match the supply of oxygen from the bulk and the need of oxygen on the surface of the oxygen carrier particles. The best substitution proportion of Co and Sr could be set in range of 0.4–0.5 and 0.2–0.4, respectively. The La0.8Sr0.2Mn0.5Co0.5O3+δ exhibited satisfactory performance and good stability in the cyclic redox tests.

Study on the reaction performance of Ce‐doped NiFe 2 O 4 oxygen carriers in the process of chemical looping hydrogen production

Chemical looping hydrogen production is a kind of hydrogen production technology with great potential. NiFe2O4 is one of the oxygen carriers with the best comprehensive hydrogen production performance, but the oxygen carrier still has the disadvantages of low hydrogen production and poor reaction stability. In this paper, a small amount of Ce was doped in the oxygen carrier to improve the hydrogen production efficiency. And the reaction stability of the oxygen carrier was improved by loading an inert carrier. The experimental results showed that the 6 wt% Ce-NiFe2O4 oxygen carrier had the highest H2 yield, and the hydrogen yield per unit mass of oxygen carrier was increased from 194 to 367 mL/g. Thermodynamic simulation and characterization results showed that the doping of Ce could enhance the oxygen release capacity and hydrogen production capacity. In the cyclic experiment, due to the damage of the oxygen carrier spinel structure and the sintering of oxygen carrier particles, the reaction activity of the 6 wt% Ce-NiFe2O4 oxygen carrier gradually reduced and the hydrogen production in the steam reactor decreased significantly after 15 cycles. After the loading of Al2O3 inert support on the 6 wt% Ce-NiFe2O4 oxygen carrier, the hydrogen production was greatly improved and remained stable after 15 cycles. The modification of the oxygen carrier could not only increase the hydrogen production but also the economic efficiency for the reduced amount of Ce and Ni.

Effect of the Presence of Siloxanes in Biogas Chemical Looping Combustion

Siloxanes are a group of Si-based impurities, common in biogas. Although normally present in relatively small amounts, their presence could be highly problematic, as the generated Si could be a precursor to abrasion and wear in downstream components. In this work, the siloxane effect in biogas chemical looping combustion (CLC) was evaluated. CLC of biogas could be an efficient way of achieving CO2 negative emissions. Two oxygen carriers (CuO-based and Fe2O3-based residue) were used in the combustion of a simulated biogas stream in a batch fluidized bed reactor. Here one of the most common siloxane compounds (hexamethyldisiloxane, L2) was utilized together with methane, the most common combustible component in biogas. The siloxane decomposed in the batch reactor, forming gaseous compounds and Si-based particles. The gaseous compounds formed (mainly CO, H2, CH4, and C2) were able to react with the oxygen carrier, whereas the Si originating from the siloxane interacted with the oxygen carrier particles. Elemental analyses of samples obtained from the reactor bed after combustion experiments revealed that significant amounts of Si from siloxane could be found in the oxygen carrier. The X-ray photoelectron spectroscopy (XPS) analyses of the same samples showed that silica in the oxygen carrier was mainly found at the surface of the particles and in the form of SiO2 or silicates/aluminosilicates. The XPS results were in agreement with a theoretical thermodynamic analysis performed to determine the possible stable Si-based species that may be formed. Although the deposition/formation of silica compounds in the oxygen carrier may lead to the agglomeration of particles, such a phenomenon was not observed in the present work.

Exploring the migration and transformation of lattice oxygen during chemical looping with NiFe2O4 oxygen carrier

Chemical looping (CL) technology using an oxygen carrier (OC) offers a versatile platform to convert various fuels (e.g., CH4, coal, and biomass) to value-added products (e.g., heat, syngas, and H2) in a clean and efficient approach. Currently, the migration and transformation mechanisms of lattice oxygen in spinel OCs were not extensively investigated, which are considered the cornerstone of OC. In this work, the release-uptake paths of lattice oxygen and the chemical reaction laws at interface were studied in detail using a composite metal oxide (NiFe2O4) as an OC through (in-situ) XPS technology coupled with fixed bed experiments. Mechanistic studies indicate that the chemical reaction interface is fixed on the surface of OC particles, and the concentration gradient between the surface and the bulk drives the transmission of lattice oxygen to achieve the reduction or oxidation of OC. Additionally, an important hydroxyl ions formation process of OC is confirmed by an in-situ XPS.

In-situ catalytic effect of potassium on petroleum coke gasification with a Mn ore-based oxygen carrier

Potassium was used as a catalyst for Chemical Looping Gasification (CLG) process in order to accelerate petroleum coke gasification. Two catalytic modes were applied, one was to use potassium to modify coke and another one was to a Mn ore based oxygen carrier. The in-situ catalytic effect of potassium during CLG process was experimentally evaluated in a fluidized bed. The influences of reaction temperature, oxygen carrier to fuel ratio, potassium introduction modes and cycles on syngas yields and distribution, carbon conversion and potassium evolution were investigated. Results indicated that both catalytic modes can accelerate coke conversion. Beneficial coke conversion was brought into play after several cycles’ activation for the potassium-modified Mn ore oxygen carrier applied for CLG process. Its activation with cycles led to an increase of the average carbon conversion rate, obtaining a stable value of 4.39%/min, higher than the one of 3.91%/min for the condition without potassium addition. Part of potassium on the surface of oxygen carrier was partially lost in the initial cycles and then fixed on the oxygen carrier particles. The remaining potassium existed in the form of K2Si4O9. The catalytic model of using the potassium to modify coke for CLG process accelerated coke conversion remarkably, obtaining an average carbon conversion rate of 7.8%/min, which is 1.78 times higher than that of using potassium to modify the Mn ore. Besides, the potassium into the reaction process had little effect on the oxygen carrier’s reactivity, but accelerated the water gas shift reaction, producing more H2 and less CO in the syngas.

Investigation of reactive multiphase characteristics in a chemical looping combustion process of biomass with hematite as oxygen carrier

Chemical looping combustion is a new combustion technology to reduce the costs and energy penalty for the capture of carbon dioxide. In this work, a three-dimensional fuel reactor model with hematite as oxygen carrier is established by computational fluid dynamics coupled with the multiphase particle-in-cell method. After model validation, the thermochemical properties of gas and solid phases in the fuel reactor are explored, including the components, slip velocity, Reynolds number and temperature. The results show that the asymmetric distribution of combustible gas concentrations is attributed to biomass injection. The oxygen carrier particles have a larger heat transfer coefficient than the biomass particles. The heat transfer coefficient of both particle species negatively correlates to the solid concentration, but positively correlates to the slip velocity and Reynolds number. The biomass particles behave with a wide range and higher value of the Reynolds number. Different axial variations of the temperature can be observed for the oxygen carrier and biomass. Moreover, a nearly 50 K temperature difference exists between the biomass and oxygen carrier. Reducing the oxygen carrier size and enlarging the superficial velocity increase the heat transfer coefficient and temperature of both particle species.

Chemical looping steam methane reforming using Al doped LaMnO3+δ perovskites as oxygen carriers

Chemical looping steam methane reforming (CLSMR) is capable of co-production of high-quality syngas and pure hydrogen, and it is important to develop appropriate oxygen carriers for this process. In this work, LaMn1-xAlxO3+δ (x = 0, 0.1, 0.3, 0.5, 0.7) perovskites were investigated as oxygen carriers for CLSMR by means of characterizations and fixed-bed tests. The characterization and test results suggested that the substitution of Al leaded to more surface active sites and higher symmetry of crystal structure, which facilitates the activation of methane molecule on the surface and the formation of the oxygen vacancy in the bulk of the oxygen carrier particles, increasing the release rate of selective oxygen and the yield of syngas. The yield of CO2 declined with the Al doped proportion due to the decrease of the mount of Mn4+ and surface absorbed oxygen. The substitution of Al cations could stabilize the crystal structure and prevent the destruction of perovskite structure. No carbon formed on LaMn1-xAlxO3+δ with x from 0 to 0.5 and a long period of partial oxidation was achieved to produce high-quality syngas with the H2/CO ratio of 2 and pure hydrogen, while carbon deposition occurred on the LaMn0.3Al0.7O3+δ oxygen carrier. LaMn0.5Al0.5O3+δ possessed the best performance with CO selectivity of 96.4%, the CO yield of 1.70 mmol·g−1, the H2 yield of 3.32 mmol·g−1 in the reduction stage and the H2 yield of 1.98 mmol·g−1 in the oxidation stage on average in 20 cyclic redox tests. LaMn0.5Al0.5O3+δ exhibited good thermal stability and cyclic performance. It can be deduced that LaMn0.5Al0.5O3+δ perovskite is a potential oxygen carrier for cyclic CLSMR.

Reduction Characteristic of CaSO4-CuO Combined Oxygen Carrier Under CO Atmosphere

CaSO4 oxygen carrier is considered to be a potential oxygen carrier (OC) for Chemical Looping Combustion because of its high oxygen capacity and low price. But its reactivity is lower than the main metal oxide oxygen carriers, and it deactivates due to sulfur loss as well as sintering at high reaction temperatures above 920 ℃. To improve the performance of CaSO4-based oxygen carrier, small amounts of CuO particles were mixed mechanistically with CaSO4 particles to use as combined oxygen carrier in this work. The reduction reactions of CaSO4 oxygen carrier, CuO oxygen carrier and CaSO4-CuO combined oxygen carrier under CO atmosphere were investigated. The effects of reaction factors including reaction temperature, the oxygen-carrying ratio of CuO to CaSO4 and mass of oxygen carrier, on the reductions have been investigated in this study. XRD, SEM-EDS, BET and gas analyses were performed to investigate the variations of solid phase, element compositions in solid residual and sulfur release with reaction time. The results show that the addition of CuO increases the reactivity of the CaSO4-based oxygen carrier while also suppressing the release of the gas sulfur. For the individual reduction of CaSO4 by CO, with the increase of CaSO4 mass (500 - 1200 mg), CO2 yield also increases until 1000 mg stops and SO2 released rises remarkably; An increase in the reaction temperature aggravated the SO2 emission. The carbon dioxide generation efficiency also increases with an increase in temperature, but decreases when the temperature exceeds 950 ℃ due to sintering of the oxygen carrier particles; With respect to the reaction of CuO with CO, CO2 yield does not change significantly with increasing temperature, due to the sintering of the CuO oxygen carrier in a high temperature reaction environment;For the combined oxygen carrier: a.As the reduction reaction temperature increases, the reduction reaction performance of the combined oxygen carrier is enhanced within the reaction temperature range of 750~900℃. b. CaO the use of CuO additives not only improves the CO conversion rate, but also inhibits the release of gas sulfide. As the oxygen carrying fraction of CuO increases, SO2 released is reduced and the SO2 release time is delayed. What� more, the solid products after reduction reaction mainly contain CaS, CaO, CuO, Cu2O and CaSO4, and no copper sulfide is detected. c. When the oxygen-carrying ratio of CuO to CaSO4 is increasing from 15% to 20%, CO2 yield increases greatly.

Oxidization and reduction kinetics of a manganese oxygen carrier granulated with the spray drying method at a tonnage scale for chemical looping combustion

Upscaling the preparation of oxygen carrier particles is a challenge in the demonstration of chemical looping combustion (CLC) technology. In this work, tonnage-scale preparation of a manganese oxygen carrier is reported. Fines of original manganese ore and kaolin are manufactured as oxygen carrier particles by using industrial spray drying granulation. The oxidization and reduction kinetics were measured using microfluidized bed thermogravimetric analysis (MFB-TGA). Morphological characterization of the fresh and tested particles was performed by scanning electron microscope coupled with an energy dispersive spectrometer (SEM-EDS). The effects of the reaction temperature and gas concentrations of O2, H2 and CH4 on the redox kinetics were investigated. The oxidization and reduction processes were composed of an initially fast reaction stage dominated by a chemical reaction mechanism and a second slow reaction stage controlled by gas diffusion through the solid product layer. The influence of temperature on the fast stage of the oxidization reaction is not obvious. Reduction by H2 is ~6 times faster than reduction by CH4. The conversion vs. time curves were described by a reactor model coupled to a two-stage kinetics model to obtain the kinetic parameters.

Effect of ash on the performance of iron-based oxygen carrier in the chemical looping gasification of municipal sludge

As sludge ash is rich in alkali metals, the oxygen carrier (OC) performance in the multi-cycle chemical looping gasification (CLG) of dried sludge is affected by simultaneously cycling and accompanying ash. Fe-based OC was used in a lab-scale fluidized-bed reactor to investigate the multi-cycle CLG of dried sludge and to study the effect of accompanied ash on OC particle. The synthesis gas, carbon conversion rate, and reaction rate were monitored over several cycles. Physicochemical characterization of the OC was accomplished to determine its effective components and the alkali metal deposition from ash. The results showed that as the number of cycles increased, the mole fractions of H2 and CO2 in synthesis gas decreased and increased, respectively, both eventually stabilizing. The carbon conversion rate reached its peak in fifth cycle. The gasification rate of sludge reached its maximum value in the 14th cycle, slowing down and then stabilizing thereafter. The OC was loaded with more alkali metal during the cycle, whose activity was enhanced at the beginning. However, once the cycle number became higher than 25, ash spheroidization and sintering occurred on its surface. Accordingly, the OCs particle size and mass became a little larger for the accumulation of unreacted lattice oxygen.

Reactivity of iron-based oxygen carriers with coal ash in pressurized chemical looping gasification

Coal ash is one of the significant factors for the operating efficiency of pressurized coal chemical looping gasification (CLG). To explore the influence mechanism of physical deposition and chemical combination of coal ash on iron-based oxygen carrier (OC) under pressurized conditions, the effects of coal ash content, coal ash components and pressure on the reduction performance of Fe2O3/Al2O3 OC are investigated. The micro-structure and phase transformation of OC particles under pressurized conditions are characterized by SEM, BET and XRD. It shows that coal ash deposition only has a significant inhibition on the reduction process of Fe2O3 to Fe3O4. The deposition inhibition is the resistance of internal diffusion, which is generated by coal ash coating the surface of OC particles and blocking pores. Then a modified kinetic model is developed to analyze inhibitory mechanism of coal ash deposition at different pressure. There is a fairly strong coating ability of new composite metal compounds ((MgAl0.74Fe1.26)O4, Ca2Fe2O5 and CaAl2SiO6) on OC particles. However, when pressure is greater than 7 bar, (MgAl0.74Fe1.26)O4 is reduced to (MgO)0.239(FeO)0.761, which can weaken coating effect. Additionally, when pressure is greater than 10 bar, Fe3O4 is largely reduced and converted into CaFe5O7, which can inhibit formation of Ca2Fe2O5.

Development of CuO-based oxygen carriers supported on diatomite and kaolin for chemical looping combustion

Chemical Looping Combustion (CLC) technology has emerged as a promising alternative capable of restricting the effects of global warming due to anthropogenic gas emissions, especially CO2, through its inherent capture. This study aims to synthesize and evaluate Cu-based oxygen carriers supported on natural materials such as diatomite and kaolin, through the incipient wet impregnation method for CLC process applications. Oxygen carriers were characterized by X-ray diffraction (XRD), temperature-programmed reduction (TPR), and scanning electron microscopy with surface energy dispersive x-ray spectroscopy (SEM-EDS). The mechanical strength of the two oxygen carrier particles was determined after the sintering procedure resulting in high crushing force. Reactivity of oxygen carriers was evaluated in a thermobalance with CH4 and H2 gases. Different reaction pathways were attempted when undergoing the redox cycles: total direct reduction of CuO to Cu0 for Cu-K and partial reduction of CuO to Cu2O and CuO to Cu-D. However, the highest reactivity and reaction rate was achieved in Cu-D due to the pore structure of diatomite, the chemical composition and the resulting interaction between CuO and the support. H2 gas reactivity tests showed a higher conversion rate and greater stability between cycles for both oxygen carriers. Thus, the reducible CuO content present in Cu-Diatomite during the reactivity test with H2 as the fuel gas was ideal for achieving high solids conversion, tendency for greater stability and a higher reaction rate.

Techno-economic evaluation of electronic waste based oxygen carriers for co-chemical looping combustion of coal and biomass integrated combined cycle power generating systems

Chemical looping combustion (CLC) is an emerging technology to capture CO2 in a cost-effective way. Metal particles such as Fe, Ni, and Cu can separate oxygen from air by forming their oxides and they could thereby act as oxygen carriers for the combustion of fuels producing nitrogen-free CO2 enriched flue gas. To commercialize the CLC based carbon capture technology, low cost oxygen carriers are essential for economical operation. Electronic waste contains enormous metal components, which can be a potential source for the production of oxygen carriers. In the present study, mixed oxygen carrier particles obtained from a printed circuit board (PCB) based electronic wastes are proposed to use in the CLC process. A combustion experiment is conducted to extract metals from the PCB and their composition is identified using an XRF analyzer. These metals are found with 21% Fe2O3, 22.8% CuO and 3% NiO, 9.6% CaO and 10% Al2O3. Using these oxidized printed circuit board metals (OPCB) as oxygen carriers, Aspen plus simulations are performed by integrating a CLC system with a combined cycle power plant having a net capacity of 150 MW for electricity generation. High ash coal (33% ash) and low ash coal (2.1% ash) and rice straw are used in a co-combustion mode for the CLC operation. The effect of co-firing on the net thermal efficiency of the power plants is analyzed. Further economic analyses are carried out for the proposed system and the levelized cost of electricity (LCOE) is estimated for the power plants using various fuels. It is found that the use of electronic waste based oxygen carriers achieved almost an equivalent net thermal efficiency of 42.4% based on the combined cycle power plants, compared to pure Fe2O3 based power plants. Further the economic analysis has shown that the levelized cost of electricity (LCOE) of the CLC integrated combined cycle power system employed with electronic waste based oxygen carriers is 85.9 $/MWh, which is the lowest among other power systems. Metal oxide interaction with fuel ash is investigated experimentally using a thermogravimetric analyzer (TGA). The X-ray diffraction (XRD) analyses of the residue confirmed that there is no formation of complex components due to the ash interaction with OPCB.