Article
Chemistry, Applied
Yunchang Dong, Yanan Wang, Jinchen Ma, Hengfeng Bu, Chuanbao Zheng, Haibo Zhao
Summary: In this study, composite oxygen carriers were prepared using extrusion-spheronization method with fine iron and copper ores as raw materials and inert aluminosilicates as binders. After optimization, the oxygen carriers showed good performance in terms of reactivity and stability, indicating the suitability of the method for large-scale preparation of oxygen carrier particles.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Chunqiang Lu, Rongrong Deng, Ruidong Xu, Yannan Zhao, Xing Zhu, Yonggang Wei, Kongzhai Li
Summary: The CeO2/MnCo2O4 oxygen carrier significantly improves the redox stability for methane combustion in Chemical Looping Combustion (CLC). Among different compositions, the 10% CeO2/MnCo2O4 sample shows the highest stability during successive CLC testing, with a methane combustion capacity of 2.22 mmol/g and average methane conversion rate of over 90%.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Haiming Gu, Xiaobo Cui, Jianqiang Wang, Wanqi Li, Xuyang Wu, Liang Wang, Shanhui Zhao, Zhenghui Qiao, Miaomiao Niu
Summary: Ce-doped and La-doped iron ore as oxygen carriers showed higher reduction reactivity compared to raw iron ore, promoting H-2 production efficiency. Reasonable doping amounts and temperature can enhance oxygen carrier conversion and stability, leading to increased H-2 yield.
Article
Chemistry, Applied
L. Nalbandian, A. Evdou, C. Matsouka, V Zaspalis
Summary: (La1-xSrx)MnO3 +/-delta perovskites prepared by co-precipitation have been evaluated for a chemical looping process with fuel CH4 and oxidants CO2 or O2. The higher the Sr content, the higher the CH4 conversion and oxygen transport capacity with CO2, but the reaction with CO2 decreases. However, the oxygen transport capacity with O2 increases as Sr content increases.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Yanan Wang, Xin Tian, Haibo Zhao, Kunlei Liu, Yunchang Dong, Zhao Su, Chuguang Zheng
Summary: By using a combination of copper ore and red mud as oxygen carrier, better combustion performance was achieved in chemical looping combustion, with a synergistic effect observed between the two materials.
Article
Chemistry, Physical
Cao Kuang, Shuzhong Wang, Song Lv, Jianjun Cai, Ming Luo, Jun Zhao
Summary: Cu-based oxygen carriers modified by iron ore and chrysotile showed enhanced performance in in-situ gasification and chemical-looping with oxygen uncoupling processes, improving energy conversion efficiency, stability, and high-temperature tolerance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Baowen Wang, Chaofan Guo, Binghui Xu, Xugang Li, Jingjing Ma, Daofeng Mei, Zhiyong Zhou
Summary: By studying the reaction between high sulfur content Chinese bituminous coal and CuFe2O4 under pressures of 0.1-3.0 MPa, it was found that increasing system pressure can improve coal conversion rate, facilitate oxygen transfer to CuFe2O4, and promote interactions between sulfur and CuFe2O4.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Energy & Fuels
Yu Li, Jing Liu, Feng Liu, Yingju Yang, Ruixue Fang
Summary: The interaction mechanism between CO and H2S over the O-defective CuFe2O4 surface during chemical-looping combustion process was investigated. The results show that CO adsorption is dominant compared to H2S adsorption, and the presence of CO* limits the H2S dehydrogenation process. CuFe2O4 oxygen carrier exhibits good anti-sulfur ability.
Article
Energy & Fuels
Yu Li, Jing Liu, Feng Liu, Yingju Yang
Summary: Chemical-looping combustion (CLC) is a promising combustion technology for fossil fuel utilization and CO2 capture due to its low cost and minimal energy penalty. This study investigates the rational design of oxygen carriers based on spinel CuFe2O4 by balancing the formation energy and transportation barrier of oxygen vacancies. Doping Cr and Co in CuFe2O4 reduces the formation energy and transportation barrier of oxygen vacancies, enabling easier oxygen migration. Cr and Co dopants also improve the reactivity and catalytic performance of CuFe2O4.
Article
Engineering, Environmental
Jing Yang, Yujie Ren, Jinsuo Lu, Hongpan Liu, Zhiqiang Zhang, Heliang Pang, Keomounlath Bounkhong
Summary: The study investigated a new PG-CuFe2O4 oxygen carrier for reducing lignite in Chemical Looping Gasification (CLG) process, successfully capturing H2S and producing syngas with high proportions of CO and H2. Experimental results showed that PG-CuFe2O4 had excellent H2S capture ability, with Fe3O4, Cu, and FeS playing important roles in the H2S capture during the reduction process.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Shuoxin Zhang, Yuchuan Feng, Xin Guo
Summary: The study found that copper doping enhanced the activities of iron-based oxygen carriers, but excessive copper would reduce their reactivity due to melting and agglomeration. Hydrogen temperature-programmed reduction (H-2-TPR) analysis, fixed-bed experiments, and density functional theory (DFT) calculations confirmed that Cu promoted the deep reduction of Fe2O3. The oxygen carrier doped with 1 wt % CuO was the most suitable material for CLH, with the highest hydrogen yield sustained at a high and stable level in multiple redox cycles.
Article
Energy & Fuels
Jingchun Yan, Tianxu Shen, Peng Wang, Xianglei Yin, Xiao Zhu, Shouxi Jiang, Laihong Shen
Summary: An innovative fluidized bed thermogravimetric analyzer was designed to study the performance of oxygen carriers in chemical looping combustion processes, revealing that high-grade manganese ore with less silicon content is more suitable for industrial CLC pilots.
Article
Energy & Fuels
Jianzheng Xu, Tao Song
Summary: This study conducted experiments and modeling on the CO2-gasification of rice husk char using a bed of red mud oxygen-carrier. The effects of oxygen carrier, temperature, and CO2 concentration were evaluated and modeled. The results showed that the red mud significantly enhanced the gasification of char. A model coupling the kinetics of char gasification and mass transfers within and surrounding the char was established and showed a good agreement with experimental results. The study also revealed the presence of mass transfer resistance within the char particle, which led to pore structure changes at a carbon conversion of about 0.3.
Article
Energy & Fuels
Kun Zhao, Xiaojie Fang, Zhen Huang, Guoqiang Wei, Anqing Zheng, Zengli Zhao
Summary: Chemical looping gasification utilizing NiFe2O4 synthesized by sol-gel method as oxygen carrier at an O/C ratio of 1 exhibits the highest gasification reactivity and H-2 production efficiency during lignite gasification. The addition of steam significantly improves the total gas yield and H-2/CO ratio of syngas, offering flexibility in adjusting the H-2/CO ratio for downstream processes.
Article
Energy & Fuels
Margarita de las Obras Loscertales, Alberto Abad, Francisco Garcia-Labiano, Juan A. C. Ruiz, Juan Adanez
Summary: The use of bio-ethanol in chemical looping combustion and reforming has the potential to produce energy and/or hydrogen, as well as remove CO2 from the atmosphere. This study examines the kinetics of ethanol conversion using a NiO-based material as the oxygen carrier. Experiment results suggest that ethanol decomposition products, rather than direct reduction with ethanol, are responsible for NiO reduction. The high temperature kinetics of ethanol conversion processes were determined, and a reaction pathway was proposed for detailed fuel reactor models.
Article
Green & Sustainable Science & Technology
Xuezhu Li, Guiyuan Cai, Yongkui Li, Xing Zhu, Xianjin Qi, Xin Zhang, Bo Shu, Kongzhai Li, Yonggang Wei, Hua Wang
Summary: Using limonite as an in situ solid iron source promotes the crystallization of scorodite for effective arsenic removal from high-arsenic smelting wastewater. This method can precipitate 99.6% of arsenic in the wastewater as environmentally stable scorodite, with the residual arsenic concentration in the filtrate further reduced to 0.1 μg/L through additional treatment with fresh limonite.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Chunqiang Lu, Rongrong Deng, Ruidong Xu, Yannan Zhao, Xing Zhu, Yonggang Wei, Kongzhai Li
Summary: The CeO2/MnCo2O4 oxygen carrier significantly improves the redox stability for methane combustion in Chemical Looping Combustion (CLC). Among different compositions, the 10% CeO2/MnCo2O4 sample shows the highest stability during successive CLC testing, with a methane combustion capacity of 2.22 mmol/g and average methane conversion rate of over 90%.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Zhiyuan Yang, Yane Zheng, Kongzhai Li, Yajing Wang, Yuhao Wang, Hua Wang, Yaming Wang, Lihong Jiang, Xing Zhu, Yonggang Wei
Summary: A series of La-Mn-Fe-O perovskite oxides were successfully prepared and used for Chemical-looping reforming of methane. The La0.85MnFe0.15O3-800 showed better structural and thermal stability during 9 cycled reactions.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Electrochemistry
Heng Wang, Jianhang Hu, Kongzhai Li, Yu Wang, Feng Zhang, Hua Wang
Summary: The study investigated the effects of MPS, PEG, TU and ETU on copper electrodeposition and found that the additives have inhibitory effects on the process. MPS and PEG inhibit copper deposition through direct adsorption on the cathode surface, while TU and ETU inhibit it through complex intermediate reactions, resulting in flatter and finer-grained deposits. These findings suggest that TU and its derivatives are suitable additives for direct copper electrodeposition at low copper ion concentration.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Energy & Fuels
Chunqiang Lu, Ruidong Xu, Ibrar Khan Muhammad, Xing Zhu, Yonggang Wei, Xianjin Qi, Kongzhai Li
Summary: The behavior of chemical looping reforming of methane over the magnetite oxygen carrier has been studied through thermodynamic analysis and experiments, revealing the importance of appropriate operating conditions and material composition. The study showed that higher temperatures are favorable for desired syngas production, while inhibiting carbon deposition. The research highlighted the significance of thermodynamic analysis in studying the reaction characteristics of chemical looping reforming of methane.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Yi Xing, Hui Zhang, Wei Su, Kongzhai Li, Juan Zhang, Jianwen Shi, Jinglei Tian, Jiaqing Wang
Summary: The novel mineral-derived catalyst showed high efficiency in degrading nitrogen oxides, with sulfuric acid modified catalyst exhibiting high NOx conversion and sulfur resistance, indicating the modification method plays a significant role in the catalytic activity.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Applied
Yane Zheng, Linzhou Zhao, Yajing Wang, Yuhao Wang, Hua Wang, Yaming Wang, Lihong Jiang, Xing Zhu, Yonggang Wei, Kongzhai Li
Summary: La1-xMnCuxO3 perovskites prepared via sol-gel method showed good oxygen mobility and reactivity in chemical looping steam methane reforming process, with high thermal stability and carbon formation resistance. La0.85MnCu0.15O3 and La0.8MnCu0.2O3 exhibited the best performance in terms of syngas productivity and selectivity.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Guixian Deng, Guifang Zhang, Xing Zhu, Qingjie Guo, Xiangbiao Liao, Xi Chen, Kongzhai Li
Summary: The modification of Ni-based catalysts by CeO2 and ZrO2 suppresses the negative effect of O-2, leading to high CH4 and CO2 conversion rates even at high temperatures. The interaction among Ni, CeO2, and ZrO2 results in well-dispersed Ni particles, contributing to long-term catalyst stability and high conversion rates.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Yanhui Long, Kun Yang, Zhenhua Gu, Shen Lin, Danyang Li, Xing Zhu, Hua Wang, Kongzhai Li
Summary: An efficient LaFeO3-based perovskite oxygen carrier doped with a small amount of Ni was designed to preferentially oxidize methane to syngas in COG, increasing the yield of H-2 from water splitting. Experimental and theoretical results demonstrate that the incorporation of Ni cations can greatly improve the activity and stability of the oxygen carrier, reducing the reaction temperature required.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Applied
Zhiqiang Li, Xiangbo Feng, Zhenhua Gu, Chunqiang Lu, Danyang Li, Xing Zhu, Lei Jiang, Guixian Deng, Kongzhai Li
Summary: Adding NiO into CeO2-MgO oxygen carrier significantly enhances the activity for CH4 and CO2 conversion, especially at 800 degrees C. The addition of NiO also improves the selectivity and yield of CO. The formation of CeO2-NiO and NiO-MgO double solid solutions contributes to the stability of the oxygen carrier.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Wenming Liu, Le Li, Sixue Lin, Yiwei Luo, Zhenghong Bao, Yiru Mao, Kongzhai Li, Daishe Wu, Honggen Peng
Summary: Carbon dioxide and methane are major greenhouse gases contributing to global warming, but dry reforming of methane (DRM) can convert them into useful products. However, the coking formation on nickel-based catalysts is a challenge for industrialization. Confined indium-nickel intermetallic alloy nanocatalysts show superior resistance to coking in DRM, with the In0.5Ni@SiO2 catalyst demonstrating the best balance of carbon deposition resistance and reactivity. This study provides guidance on designing high-performance catalysts for methane dry reforming to utilize greenhouse gases efficiently.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiangbiao Liao, Yanhui Long, Yan Chen, Amirali Zangiabadi, Hua Wang, Qinggang Liu, Kongzhai Li, Xi Chen
Summary: A cyclic redox scheme with self-generated Ni nanoparticles/LaFeO3 heterogeneous structure was reported for efficient CO2 utilization at a low temperature of 800 degrees Celsius. The modified LaFeO3 sample showed stable and superior performance with high CO selectivity and CO2 conversion rates, even in the presence of impurities, over 100 redox cycles. The exsolved Ni metal nanoparticles on the perovskite surface served as catalytically active sites for methane conversion and activation of C-O bonds during CO2 reduction.
Review
Chemistry, Multidisciplinary
Dong Tian, Steven R. Denny, Kongzhai Li, Hua Wang, Shyam Kattel, Jingguang G. Chen
Summary: Transition metal carbides and nitrides, as interesting non-precious materials that can replace or reduce the loading of precious metals for catalyzing important electrochemical reactions, have attracted high interest from scientific communities. This review summarizes density functional theory studies, describes reaction pathways, identifies activity and selectivity descriptors, and provides a future outlook for designing carbide and nitride catalysts.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Physical
Kun Yang, Zhenhua Gu, Yanhui Long, Shen Lin, Chunqiang Lu, Xing Zhu, Hua Wang, Kongzhai Li
Summary: This study focuses on producing pure H-2 from coke oven gas (COG) using chemical looping reforming technology. La0.5Sr0.5FeO3 shows the highest methane conversion rate, hydrogen yield, and hydrogen purity among different perovskite oxides studied.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Hansheng Xiao, Hua Zhu, Wei Weng, Kongzhai Li, Wei Li, Wei Xiao
Summary: The conversion of carbon dioxide into a hydrogen-evolution electrocatalyst using a molten salt electrochemical method shows efficient modulation of thickness, adhesion, and interfacial confinement. The resulting Mo2C-Mo binder-free electrode displays enhanced electrocatalytic activity towards hydrogen evolution due to lower hydrogen adsorption energy at the Mo2C-Mo interface. This generic method integrates carbon dioxide fixation and surface carbonization of a metal to functional films.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)