Article
Engineering, Chemical
Bo Jin, Tong Ouyang, Zhineng Zhang, Yunlei Zhao, Haiyan Zhang, Wenxing Yao, Guiqiu Huang, Zhiwu Liang
Summary: Chemical looping CO2 capture and in-situ reverse water gas shift (CL-ICCC-RWGS) is a promising method for integrated CO2 capture and conversion. A new scheme of CL-ICCC-RWGS is proposed by introducing a redox couple to alter the reaction configuration into a sorbent-oxygen-carrying form. By synthesizing a series of Ca-Fe bifunctional materials with varying iron loadings, a new integrated CO2 capture and conversion scheme is experimentally demonstrated. The FCZ136 material shows the best performance with high CO generation rate and superior stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jiawei Hu, Plaifa Hongmanorom, Vladimir V. Galvita, Zhan Li, Sibudjing Kawi
Summary: The research focuses on the development of a bifunctional Ni-Ca based material to enable isothermal capture and release of CO2, as well as in-situ conversion of CH4 into syngas in a single reactor. The addition of CeO2 helps combat inactive carbon accumulation and activate CO2 and CH4, leading to enhanced syngas production during cyclic CaLDRM. The bifunctional material successfully converts over 40% of CH4 and CO2 under thermodynamically unfavorable conditions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Yunlei Zhao, Youyou Li, Bo Jin, Zhiwu Liang
Summary: Chemical looping is a powerful process intensification strategy for integrated CO2 capture and utilization. In this study, a bifunctional Ca-Fe-Mg material derived from LDH was synthesized and used in chemical looping reforming process. The results showed that 900°C was the suitable reforming temperature, and the material exhibited high syngas production and stable H2/CO ratio.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
DongHwan Oh, Filippo Colombo, Luca Nodari, Jun Hyuk Kim, Jun Kyu Kim, Siwon Lee, Seunghyun Kim, Sangwoo Kim, Dae-Kwang Lim, Jongsu Seo, Sejong Ahn, Simone Mascotto, WooChul Jung
Summary: Chemical looping reforming coupled with CO2 splitting is a promising method for CO2 utilization, producing valuable fuel. Researchers have developed a novel perovskite oxide (La0.6Ca0.4Fe0.95M0.05O3-delta, M = Ni, Co, Ni-Co) that acts as both an oxygen carrier and a redox catalyst. Through various techniques, they observed the spontaneous formation of alloy nanoparticles on the surface of the co-doped carriers in a CH4 atmosphere. These co-doped samples showed high reactivity towards both gases and demonstrated excellent coking and redox stability, achieving record-level syngas yield.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Energy & Fuels
Bashar Al-Qadri, Xiaojia Wang, Delu Chen
Summary: Chemical looping co-gasification of alfalfa and polyethylene with Fe2O3 as oxygen carrier was studied in a fixed-bed reactor, revealing that at a gasification temperature of 950 degrees C, the optimum product distribution was achieved with specific ratios of steam/alfalfa, OC/alfalfa, and PE/alfalfa. The presence of PE in the feedstock led to higher production of synthetic gas, particularly the hydrogen yield, as the H-2/CO ratio increased to more than 2 to match the demand of Fischer-Tropsch synthesis.
Article
Energy & Fuels
N'dri Arthur Konan, Mary Ann Clarke, Hossain Aziz, Mehrdad Shahnam
Summary: This study numerically examines the oxygen production through air separation using the redox cycle reactions of Sr1-xCaxFeO3-δ perovskite particles. The results show that the oxygen production can be enhanced by 4% through thermal management at 500 degrees C. Additionally, increasing the operating temperature to 550 degrees C can significantly increase the oxygen production by approximately 30%.
Article
Chemistry, Multidisciplinary
Xijun Wang, Yunfei Gao, Emily Krzystowczyk, Sherafghan Iftikhar, Jian Dou, Runxia Cai, Haiying Wang, Chongyan Ruan, Sheng Ye, Fanxing Li
Summary: Chemical looping (CL) is a versatile and emerging strategy for sustainable chemical and energy conversion. Designing metal oxide oxygen carriers remains a critical challenge for CL, and this study successfully expanded the materials design space by screening new oxygen carriers using high-throughput methods. The effectiveness of high-throughput approaches for accelerated materials discovery was supported by the identification of previously reported oxygen carriers and the experimental demonstration of new carriers with superior redox performance.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Review
Energy & Fuels
Jian Chen, Lunbo Duan, Yuxin Ma, Yuxin Jiang, Anqi Huang, Hongyu Zhu, Hongyu Jiao, Mingdi Li, Yanbin Hu, Hui Zhou, Yongqing Xu, Felix Donat, Muhammad Awais Naeem, Oliver Krocher
Summary: CaL-CLC is an efficient and cost-effective CO2 capture technology that uses the heat generated by chemical looping combustion. Many studies have been carried out on the CaL-CLC process, and it is important to summarize recent progress and provide future research directions.
Article
Chemistry, Physical
Xuesheng Yan, Honglin Liu, Ming Luo, Jianjun Cai, Ruicong Shen
Summary: An integrated hydrogen and power co-generation system based on slurry-feed coal gasification and chemical looping hydrogen generation (CLH) with Shenhua coal as fuel and Fe2O3/MgAl2O4 as an oxygen carrier was proposed. The system's main units were analyzed to optimize the parameters. The syngas can be fully converted in the fuel reactor, and both the fuel reactor and steam reactor can maintain heat balance. The purity of the produced hydrogen is 100% after water condensation. Energy and exergy analyses were conducted, and pinch technology was used to design the heat transfer network.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Applied
Jinchen Ma, Xin Tian, Chaoquan Wang, Haibo Zhao, Zhaohui Liu, Chuguang Zheng
Summary: The study focused on the nitrogen conversion and distribution characteristics in the two elementary stages of coal conversion during the iG-CLC process. It was found that HCN was the dominant precursor of NOx in iG-CLC, and most NOx precursors were released during coal pyrolysis. The high CO2 concentration and reducing reaction atmosphere in the fuel reactor were found to inhibit the formation of NO.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Giovanny S. de Oliveira, Ciro E. S. Lobo, Carlos E. A. Padilha, Domingos F. S. Souza, Juan A. C. Ruiz
Summary: Brazil aims to reduce its CO2 emissions by utilizing glycerin in Chemical Looping Combustion (CLC). The study evaluates the feasibility of using glycerin in CLC and finds that the addition of ethanol improves combustion efficiency, while the addition of methanol reduces efficiency.
Article
Chemistry, Applied
Ivan Gogolev, Toni Pikkarainen, Juho Kauppinen, Markus Hurskainen, Anders Lyngfelt
Summary: The chemical looping combustion of wood pellets, wood char, and straw pellets with different oxygen carriers was studied to investigate alkali emissions. Different fuel types and oxygen carriers had varying impacts on the particle size distributions and stable alkali species compositions. Thermodynamic modeling predicted the stability of different alkali species at 800 degrees Celsius for each fuel type.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Arturo Cabello, Alberto Abad, Pilar Gayan, Francisco Garcia-Labiano, Luis F. de Diego, Juan Adanez
Summary: The study evaluated the activation process of a CaMn0.775Mg0.1Ti0.125O2.9-delta perovskite material in chemical looping combustion, showing that pre-activation and lowering the phi ratio can improve reactivity and combustion efficiency.
Review
Chemistry, Physical
Ming Tian, Chaojie Wang, Yujia Han, Xiaodong Wang
Summary: This review discusses recent advances in oxygen carriers for chemical looping reforming of CH4. The focus is on metal-based OCs, composite OCs, and catalytic OCs, with specific discussions on the influence of OC structure on reaction and design strategies for tailored OCs. Challenges and suggestions for future research on outstanding OCs for CLR of CH4 are also provided.
Article
Engineering, Chemical
Rushikesh Joshi, Yaswanth Pottimurthy, Vedant Shah, Pinak Mohapatra, Sonu Kumar, Omari Jones, Marianna Beard, Ibiada Harry, Albany Hornbuckle, Mandar Kathe, Liang-Shih Fan
Summary: The CDCL-SR process proposed in this study utilizes a multimetal oxide as the oxygen carrier to combust coal and capture sulfur in situ, resulting in high thermal and exergy efficiencies. The process eliminates the need for downstream processing units by producing separate streams of CO2 and SO2 during combustion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
