Article
Engineering, Environmental
Ming Luo, Yanjun Qin, Jianjun Cai, Lili Qian, Shuxiang Wang, Haiyan Zhang, Lunzheng Zhou, Peng Liu
Summary: This study investigated the release and migration characteristics of sulfur in the chemical looping combustion of coal with two different synthetic oxygen carriers. The results showed that sulfur behavior varied under different conditions, with sulfur mainly migrating to metal sulfides at lower temperatures and peroxide coefficients.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Chemistry, Applied
Doki Yamaguchi, Liangguang Tang, Jose Orellana, Trevor D. Hadley, Sankar Bhattacharya, Kok-Seng Lim
Summary: The study developed a compact fully looped chemical looping reactor and found that the CLC performance increased with increasing operation time over 36 hours, as indicated by the increase in the CO2/CO molar ratio. The morphology changes and ash interaction of the Australian ilmenite did not noticeably affect the CLC performance or operation during continuous operation.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Thermodynamics
Ying-jie Zhao, Yu-ke Zhang, Yang Cui, Yuan-yuan Duan, Yi Huang, Guo-qiang Wei, Usama Mohamed, Li-juan Shi, Qun Yi, William Nimmo
Summary: A coal chemical looping combustion (CLC) power plant with CO2 capture was established and validated, showing higher net energy efficiency, lower cost of electricity, and less coal consumption compared to a traditional MEA-based ultra-supercritical coal power plant. This was achieved through optimizing operation parameters and heat exchange networks, as well as utilizing in-situ CO2 capture, lower exergy destruction, and efficient energy integration and recovery.
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
Thermodynamics
Fatih Gulec, Jude A. Okolie, Ahmet Erdogan
Summary: Oil refineries contribute 4-6% of global CO2 emissions, mainly due to the FCC unit's regenerator. Chemical looping combustion (CLC) is a promising CO2 capture process for FCC units, but its economic feasibility has not been studied. This research presents the first techno-economic feasibility analysis of a CLC-FCC unit, demonstrating lower energy penalties and capture costs compared to conventional CCS technologies.
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.
Review
Environmental Sciences
Siddig Abuelgasim, Wenju Wang, Atif Abdalazeez
Summary: Chemical looping combustion (CLC) is a promising CO2 capture technology that utilizes metal particles to transport oxygen and avoid nitrogen in combustion exhaust. Oxygen carrier is a key parameter in CLC, and tests have shown its feasibility worldwide.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Thermodynamics
Haodong Huang, Jinchen Ma, Haibo Zhao, Chuguang Zheng
Summary: This work investigates the behavior of coal-derived chlorine in chemical looping combustion (CLC) and the potential adverse impacts of primary gaseous chlorine (HCl) on a Cu-based oxygen carrier (OC). The inactivation mechanism of the sol-gel-derived CuO/Al2O3 OC is studied. It is found that HCl is the main gaseous chlorine in coal CLC and shows high reactivity towards CuO. The presence of HCl can result in corrosion and degradation of the OC.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Energy & Fuels
Sonu Kumar, Pinak Mohapatra, Rushikesh K. Joshi, Matthew Warburton, Liang-Shih Fan
Summary: We propose a new low-temperature chemical looping combustion scheme for natural gas conversion into CO2 and NOx purification. The process utilizes NiO/ZrO2 as the oxygen carrier and operates at temperatures close to the flue gas temperature of 400-500 degrees C. Thermodynamic studies show that the presence of CO2 does not significantly affect NOx purification performance. Comparative analyses indicate improvements in exergy efficiency and effective thermal efficiency compared to conventional NOx selective catalytic reduction (SCR) processes.
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
Thermodynamics
Junjie Lin, Kun Luo, Shuai Wang, Liyan Sun, Jianren Fan
Summary: The hydrodynamic and thermochemical characteristics in the coal-direct chemical looping combustion (CLC) process were studied using a self-developed computational fluid dynamics - discrete element method (CFD-DEM) approach. The results showed that increasing the coal feeding rate improved the combustion efficiency, while finer oxygen carriers promoted the conversion of gas products. In addition, a dual-side coal feeding arrangement significantly improved the system's uniformity.
Article
Thermodynamics
Syed Saqline, Zhen Yee Chua, Wen Liu
Summary: Chemical looping combustion is a cost-competitive solution for producing low carbon electricity. By conducting process modeling studies, this research investigated the coupling of chemical looping combustion with advanced steam-based power cycles, finding in situ gasification chemical looping combustion to have the highest efficiency. Energy efficiency penalties for capturing CO2 are relatively low compared to power plants without carbon capture.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Barnali Bhui, V Prabu
Summary: The co-utilization of high ash Indian coal and rice straw in Chemical looping combustion (CLC) process has been shown to increase CO2 capture efficiency and gas conversion. Experimental results demonstrate a higher reactivity between char and Fe2O3 under the co-combustion mode, leading to increased weight loss of solid fuel. Furthermore, the study evaluated kinetic parameters for the CLC and non-CLC based reactions under various operating temperature regimes.
JOURNAL OF THE ENERGY INSTITUTE
(2021)
Article
Chemistry, Physical
Song He, Lin Gao, Rui Dong, Sheng Li
Summary: Coal gasification technology is important for coal-based hydrogen production and the transition to Hydrogen Economy. A novel three-step gasification technology coupled with chemical looping combustion process is proposed to enhance efficiency and reduce exergy destruction. The system achieves higher cold gas efficiency, energy efficiency, and lower exergy destruction compared to traditional gasification technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Analytical
Guanshuai Zhang, Shanjian Liu, Dongmei Bi, Zhisen He, Jia Liu, Yinjiao Liu
Summary: Hydrogen peroxide pretreatment was applied for fast pyrolysis of corn stalks, and it was found that the pretreatment effectively promoted lignin depolymerization and decreased the reaction activation energy. The pretreatment also increased the cellulose content and removed alkali and alkaline earth metals from the biomass. The pH of the hydrogen peroxide solution affected the removal of lignin and ash by the pretreatment, and the composition of bio-oil changed significantly, with a significant increase in the relative content of levoglucosan after pretreatment.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2024)