Cui Quan , Shaoxuan Feng , Shibo Gao , Minhua Zhang , Chunfei Wu , Norbert Miskolczi
{"title":"Sorption-enhanced ethanol steam reforming coupled with in-situ CO2 capture and conversion","authors":"Cui Quan , Shaoxuan Feng , Shibo Gao , Minhua Zhang , Chunfei Wu , Norbert Miskolczi","doi":"10.1016/j.joei.2024.101808","DOIUrl":"10.1016/j.joei.2024.101808","url":null,"abstract":"<div><p>The impacts of climate change and the issue of greenhouse gas emissions have sparked research into renewable energy alternatives to fossil fuels. Hydrogen has gained attention as a clean, renewable and environmentally friendly energy source. Enhanced-ethanol steam reforming has been proposed as a promising method for blue hydrogen production, addressing greenhouse gas emission issues. The use of catalysts enhances the adsorption of ethanol and water molecules on the surface, promoting the reaction rate. This study systematically explored the effects of different Fe loading and CaO addition ratios on the ethanol steam reforming and CO<sub>2</sub> conversion processes to optimize catalyst performance. The experimental results showed that Fe/SiC catalysts effectively promoted the conversion of ethanol and generated high-purity hydrogen, exhibiting excellent catalytic activity. Specifically, a catalyst with 10 % Fe loading and mixed with 0.3g CaO significantly increased the hydrogen yield to 64.4 mmol/g, which was 2.88 times higher than that without the catalyst.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101808"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on interaction mechanism of steam coupling biomass sludge gasification to syngas with pickling sludge as oxygen carrier","authors":"Shuanghui Liu, Fangmin Chen, Feng Duan, Lihui Zhang","doi":"10.1016/j.joei.2024.101810","DOIUrl":"10.1016/j.joei.2024.101810","url":null,"abstract":"<div><p>A process of producing hydrogen-rich syngas by chemical looping steam gasification is proposed, using pickling sludge (PS) as the oxygen carrier and paper-making sludge(PMS) along with municipal sludge(MS) as the fuel. The reaction characteristics of producing hydrogen-rich syngas through the gasification of PMS and MS were studied. The effects of temperature, steam flow rate and the blended ratio of PS on carbon conversion rate and gasification reaction efficiency were discussed, and the migration mechanisms of the main elements were explained. The results show that FeF<sub>3</sub> in PS exhibits stronger activity than conventional Fe<sub>2</sub>O<sub>3</sub> in catalyzing the gasification of PMS and MS at high temperature. With the blended mass ratio of 1:1 of PS, the carbon conversion rate of PMS and MS was increased by 11.8 % and 42.5 %, and the gasification efficiency was increased by 11.1 % and 25.85 %. The Fe<sup>3+</sup> in PS catalyzed the cleavage of C-H bonds in biomass sludge, and Fe<sup>3+</sup> was reduced to form the intermediate product FeCr<sub>2</sub>O<sub>4</sub> with tar cracking function. After the gasification reaction, the Fe in PS was completely converted to Fe<sub>3</sub>O<sub>4</sub> under the action of MS, while the CaO in PMS promoted the valence cycle of Fe to some extent, resulting in partial Fe being fully cycled to Fe<sup>3+</sup> to form γFe<sub>2</sub>O<sub>3</sub>. In addition, the CaO can fix the F element in PS to form CaF<sub>2</sub>, thus reducing the environmental hazard.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101810"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lei Xu , Jincheng Yang , Xinkai Shen , Xutong Wu , Dong Liu
{"title":"Effects of dimethoxymethane and isopropanol blending on soot formation in ethylene and propane counterflow diffusion flames","authors":"Lei Xu , Jincheng Yang , Xinkai Shen , Xutong Wu , Dong Liu","doi":"10.1016/j.joei.2024.101805","DOIUrl":"10.1016/j.joei.2024.101805","url":null,"abstract":"<div><p>Introducing low-carbon oxygenated fuels into the current transport sector provides an effective pathway for mitigating the emissions of greenhouse gases and harmful pollutants such as soot. Previous studies have revealed that oxygenated fuels can reduce soot formation, but the soot-reduction potential is closely related to the chemical interaction between the oxygenates and the baseline hydrocarbons. This work is devoted to study the effects of blending dimethoxymethane (DMM) and isopropanol (IPA) on soot formation in ethylene-based and propane-based counterflow diffusion flames. Soot formation in the target flames was experimentally characterized using a planar light extinction technique, accompanied by numerical analysis to provide complementary insights. The results confirmed that the effects of blending oxygenates on soot formation are sensitive to the fuel-specific molecular structure of the oxygenates and hydrocarbons. For the C<sub>2</sub>H<sub>4</sub>-based flames, blending DMM and IPA could lead to a synergistic effect on soot formation due to chemical fuel interaction, with stronger synergy observed with IPA blending. In contrast, no evident synergistic effects on soot formation were observed in the C<sub>3</sub>H<sub>8</sub>-based flames, for which a notable soot reduction was observed with DMM blending. Reaction pathway analysis suggested that the occurrence of soot synergy in the C<sub>2</sub>H<sub>4</sub>-based flames is mainly due to the chemical interaction between the methyl radicals generated from DMM/IPA and the C<sub>2</sub> species from C<sub>2</sub>H<sub>4</sub>. This study is expected to deepen our understanding of the soot formation behavior of DMM- and IPA-blended flames, thus contributing to their successful usage as clean alternative fuels.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101805"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Leilei Liu , Xinlu Han , Changhui Wang , Shuo Zhang , Hongqing Feng
{"title":"Experimental and numerical study of laminar burning velocity for Diisobutylene+ PRF/TRF mixtures","authors":"Leilei Liu , Xinlu Han , Changhui Wang , Shuo Zhang , Hongqing Feng","doi":"10.1016/j.joei.2024.101802","DOIUrl":"10.1016/j.joei.2024.101802","url":null,"abstract":"<div><p>DIB (Diisobutylene, JC<sub>8</sub>H<sub>16</sub>) strongly correlates with real gasoline and significantly impacts the combustion behavior of alternative fuels designed as gasoline substitutes. However, accuracy concerns persist in laminar burning velocity data reported in literature. In this paper, the laminar burning velocities of DIB + air, DIB + PRF + air, and DIB + TRF + air mixtures were measured by the heat flux method at 1 atm. (PRF, Primary Reference Fuel; TRF, Toluene Reference Fuel) The equivalence ratio was controlled within 0.6–1.3, and the initial temperatures were set at 298K, 318K, and 338K. Additionally, by employing the mechanism proposed by Ren et al., the simulated values align with the experimental data, thus prompting the conduction of a reaction kinetic analysis. The analysis of chemical reaction kinetics reveals the reaction pathways of DIB, with a notable observation that an increase in temperature or a decrease in equivalence ratio can both lead to an elevation in the degree of unsaturation in the bonds of intermediate species. During laminar flame combustion, PRF and TRF compete with DIB for oxygen, with PRF appearing to have a stronger ability to capture oxygen. In addition, the laminar burning velocity temperature dependence coefficient α decreases first and then increases with the increase of the equivalence ratio, where the minimum α is obtained at equivalence ratio = 1.1. Additionally, the laminar burning velocity at higher initial temperatures is estimated by the extrapolation method and compared with the experimental data reported in literature.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101802"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhiwei Wang , Shuaihua Guo , Gaofeng Chen , Zaifeng Li , Mengge Wu , Yan Chen , Tingzhou Lei , Kiran G. Burra , Ashwani K. Gupta
{"title":"Towards enhanced monocyclic aromatic hydrocarbons production from Co-pyrolysis of biomass and waste polystyrene plastic","authors":"Zhiwei Wang , Shuaihua Guo , Gaofeng Chen , Zaifeng Li , Mengge Wu , Yan Chen , Tingzhou Lei , Kiran G. Burra , Ashwani K. Gupta","doi":"10.1016/j.joei.2024.101812","DOIUrl":"10.1016/j.joei.2024.101812","url":null,"abstract":"<div><p>Co-pyrolysis technology offers a viable solution for utilizing biomass and waste plastics as a valuable energy resource, to support waste management, energy supply and environmental protection. In this paper, co-pyrolysis of poplar tree (PT) and polystyrene (PS) at mixture ratios of 0:1, 3:1, 2:1, 1:1, 1:2, 1:3 and 1:0 under different pyrolysis temperatures (450, 550, 650, and 700 °C), using different catalysts (HZSM-5, MCM-41, Fe/HZSM-5, and Cu/HZSM-5) were investigated using gas chromatography/mass spectrometry (Py-GC/MS) diagnostics for determining products distribution and synergistic effects. The results showed that PT performed best at a pyrolysis temperature of 650 °C, whereas PS performed best at 550 °C. The relative amount of aromatics in the co-pyrolysis products of PT and PS was highest at 550 °C that showed positive synergistic effects. The synergistic effects from the co-pyrolysis of PT and PS were significantly different at different mixture ratios of the PT and PS feedstocks. At mixture ratios of 1:1 and 1:2, the relative amounts of polycyclic aromatic hydrocarbons (PAHs) and monocyclic aromatic hydrocarbons (MAH) were higher and showed positive synergistic effects. The catalysts promoted the generation of MAH and inhibited the PAHs formation in the co-pyrolysis. The Fe/HZSM-5 catalyst provided the most significant effect on MAH showing the highest relative amounts. The results showed that highest yield of monocyclic aromatic hydrocarbons can be achieved from the pyrolysis of PT and PS materials at 1:1 mixture ratio using Fe/HZSM-5 catalyst, at a reaction temperature of 550 °C.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101812"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haonan Zheng , Yiran Zhang , Zibo Xu , Guangzhao Zhou , Xuteng Zhao , Zhen Huang , He Lin
{"title":"One-step synthesis of Pt@(CrMnFeCoNi)3O4 high entropy oxide catalysts through flame spray pyrolysis","authors":"Haonan Zheng , Yiran Zhang , Zibo Xu , Guangzhao Zhou , Xuteng Zhao , Zhen Huang , He Lin","doi":"10.1016/j.joei.2024.101804","DOIUrl":"10.1016/j.joei.2024.101804","url":null,"abstract":"<div><p>High entropy oxides (HEOs) show great prospects in catalysis owing to their widely tunable component structures and ease of combination with active metals. However, the development of HEO catalysts is limited by the lack of efficient synthesis methods due to the difficulty of homogeneously mixing at least five elements. In this work, flame spray pyrolysis (FSP) is successfully employed to synthesize (CrMnFeCoNi)<sub>3</sub>O<sub>4</sub> HEO with a single phase spinel structure in one step, which is verified by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and energy-dispersive X-ray spectroscopy (EDS). Taking CO catalytic oxidation as a probe reaction, the Pt@(CrMnFeCoNi)<sub>3</sub>O<sub>4</sub> HEO catalyst synthesized by FSP in one step is compared with the catalyst whose Pt is impregnated on (CrMnFeCoNi)<sub>3</sub>O<sub>4</sub> HEO support. The FSP-made catalysts have a higher catalytic reaction rate and better redox ability, which lowers the temperature of complete CO conversion by nearly 100 °C. Furthermore, it can be observed that the flame parameters can be optimized to modify the particle size and oxygen vacancies of the HEO nanoparticles, thus enhancing the catalytic performances. This work demonstrates that FSP is an effective method for the one-step synthesis of HEO catalysts with excellent catalytic performance, providing a new perspective for the synthesis of HEO-based materials.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101804"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yong-hong Niu , Zheng-yang Chi , Zhi-qiang Wang , Man Yang , Feng-tao Han
{"title":"Mechanistic analysis of hydrogen-rich Co-gasification of pine wood and polypropylene-based waste masks using Fe/Dol catalyst","authors":"Yong-hong Niu , Zheng-yang Chi , Zhi-qiang Wang , Man Yang , Feng-tao Han","doi":"10.1016/j.joei.2024.101801","DOIUrl":"10.1016/j.joei.2024.101801","url":null,"abstract":"<div><p>Disposable masks, predominantly made of polypropylene melt-blown fabric, present a significant environmental challenge due to their large volume and resistance to natural degradation. This study explores the co-gasification of forestry waste, specifically pine wood, and waste masks to enhance biomass gasification efficiency while enabling the high-value utilization of waste materials. The Fe/Dol catalyst, prepared by loading transition metal Fe onto calcined dolomite using the impregnation method, was tested in a two-stage fixed-bed gasification system. Steam was employed as the gasifying agent. The study systematically examines the effects of steam flow rate, gasification reforming temperature, the mixing ratio of pine wood to masks, and Fe loading on the catalyst's performance in gas-phase and liquid-phase product formation.Characterization analyses revealed that Fe oxides facilitate the cleavage of aromatic rings in aromatic compounds, leading to the formation of two-carbon chain segments and promoting the production of ethylene and propylene from aliphatic hydrocarbons. Additionally, the catalyst enhanced tar cracking, generating free radicals and ring bonds. Experimental results indicate that at a steam flow rate of 3 mg/min, a gasification temperature of 850 °C, a pine wood to mask mixing ratio of 1:2, and an Fe loading of 8 %, the hydrogen (H<sub>2</sub>) volume fraction reached 52.48 %, with a gas yield of 1.67 m³/kg and a hydrogen production rate of 78.25 g/kg.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101801"},"PeriodicalIF":5.6,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shouzhen Zhang, Qinglong Tang, Haifeng Liu, Rui Yang, Mingfa Yao
{"title":"Numerical investigation and optimization of the ammonia/diesel dual fuel engine combustion under high ammonia substitution ratio","authors":"Shouzhen Zhang, Qinglong Tang, Haifeng Liu, Rui Yang, Mingfa Yao","doi":"10.1016/j.joei.2024.101797","DOIUrl":"10.1016/j.joei.2024.101797","url":null,"abstract":"<div><p>This study investigated the effects of initial temperature, equivalence ratio, and diesel injection timing on engine combustion and emission characteristics at high ammonia substitution ratios. Increased compression temperature and pressure significantly reduce ignition delay, enhance combustion speed and efficiency, and decrease N<sub>2</sub>O and unburned NH<sub>3</sub> emissions. A strong correlation exists between the amount of N<sub>2</sub>O produced and the mass of unburned NH<sub>3</sub> when ammonia combustion efficiency is high. The N<sub>2</sub>O distribution is concentrated near the cylinder walls and the piston top surface, in areas with high concentrations of unburned NH<sub>3</sub>. As the equivalence ratio increases from 0.6 to 0.75, flame propagation speed and indicated thermal efficiency (ITE) increase, while NOx, N<sub>2</sub>O, and unburned NH<sub>3</sub> emissions decrease. The combustion performance and emissions were optimized by advancing the diesel injection timing and increasing the equivalence ratio to accelerate the combustion speed. This adjustment increases ITE to 47.6 % at an 80 % ammonia energy ratio. Post-optimization results show a reduction in unburned NH<sub>3</sub> emissions from 51.7 g/kW·h to 5.9 g/kW·h and a decrease in N<sub>2</sub>O emissions from 0.930 g/kW·h to 0.370 g/kW·h, culminating in a 60.4 % reduction in greenhouse gas (GHG) emissions.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101797"},"PeriodicalIF":5.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Micropore effects on coal pyrolysis process investigated by using reactive molecular dynamics","authors":"Mo Zheng , Xiaoxia Li","doi":"10.1016/j.joei.2024.101798","DOIUrl":"10.1016/j.joei.2024.101798","url":null,"abstract":"<div><p>The micropore structure can serve as the diffusion channels for intermediates and light tar products during coal pyrolysis, which is very important for modulating the desired tar or char products. In this work, the micropore effects on product distribution and the reaction mechanisms during Hailaer coal pyrolysis was explored for the first time from the atomistic simulation point of view by using large-scale ReaxFF MD simulation and the reasonable model with the artificially adding micropore strategy. The results suggest that the micropore structure indeed has a significant impact on the major tar product distribution and competitive reactions during coal pyrolysis process at high temperature. The micropore can promote decomposition reactions through accelerating C–C bond breaking significantly and inhibit the recombination reactions accompanied with the char formation with more carbon in <em>sp2</em> structure. Based on the oxygen-containing bond behaviors in char products obtained from coal pyrolysis process, it is unraveled that the more micropore exits in coal structure, the more C<sub><em>sp3</em></sub>-O bonds and less C<sub><em>sp2</em></sub>-O bonds in char precursors. Particularly, the light tar products with ring groups are more influenced by micorpore structures than those chain products. Considering that the limitation of current experimental techniques in micropore detection, the strategy sheds new light on the depth investigation of micropore effects on reactions, which can provide complement for experimental observations and tar product modulation.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101798"},"PeriodicalIF":5.6,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142002457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuneng Tang , Cheng Liu , Shibo Kuang , Qianqian Liu , Zhenyu Chen , Haitao Song , Bin Su , Jianglong Yu , Lian Zhang , Baiqian Dai
{"title":"CFD modeling investigation of oxy-fuel combustion application in an industrial-scale FCC regenerator","authors":"Yuneng Tang , Cheng Liu , Shibo Kuang , Qianqian Liu , Zhenyu Chen , Haitao Song , Bin Su , Jianglong Yu , Lian Zhang , Baiqian Dai","doi":"10.1016/j.joei.2024.101796","DOIUrl":"10.1016/j.joei.2024.101796","url":null,"abstract":"<div><p>The increase in atmospheric CO<sub>2</sub> concentration and its consequential impact on climate change have elicited increased public concern. The refinery units including fluid catalytic cracking (FCC) generate substantial quantities of CO<sub>2</sub>. To mitigate the emission from the FCC process, oxy-fuel combustion has emerged as a prospective carbon capture and storage technology. This study presents the first trial for the modeling investigation of a 70 kt/a industrial FCC regenerator under the scenario of retrofitting it with oxy-fuel combustion technology. Employing the Eulerian-Eulerian model, a CFD model integrating heat transfer and coke combustion reactions has been established. The detailed hydrodynamics, temperature, and species concentration distribution inside the regenerator are obtained under both air-firing and oxy-firing conditions, which are further compared to exploit the possibility of oxy-fuel combustion retrofitting. As has been found, decreases in gas temperature and carbon conversion rate were observed for 21 % O<sub>2</sub>/79 % CO<sub>2</sub> atmosphere in comparison to the air reference case due to the differences in gas properties between N<sub>2</sub> and CO<sub>2</sub>. This discrepancy resulted in a drop of 17 K in dilute phase temperature and 2 K in dense phase temperature. The bed density also exhibited a large with the oxy-firing conditions, with notable observations revealing a lower bed density below a height of 4.2 m, transitioning to a higher density above said height. Sensitivity analysis was also conducted for three principal operating parameters, including superficial gas velocity, oxygen partial pressure, and catalyst circulation rate. An increase of oxygen partial pressure to 27 % or a decrease of the catalyst circulation rate to 20.7 kg/s proved effective in achieving the same temperature profile and even a slightly better carbon conversion in comparison to air-firing regeneration.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101796"},"PeriodicalIF":5.6,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1743967124002745/pdfft?md5=77501723c00248837cf95df95dc49662&pid=1-s2.0-S1743967124002745-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}