Article
Engineering, Environmental
Xueyan Sun, Liangliang Zhu, Wei Zhao, Feng Li, Xi Chen
Summary: In this study, a chemical looping scheme was developed to efficiently reduce impure CO2 containing O-2 impurities into high value-added substances. The synergistic effect of Ni and Fe played a key role in achieving high conversion and yield. This work presents a promising approach for direct utilization of impure CO2 and achieving carbon-neutral economic development.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Wei-Hsin Chen, Kuan-Hsiang Chen, Aristotle T. Ubando, Wen-Jhy Lee, Man -Hin Chio
Summary: Chemical looping combustion (CLC) using iron-based oxygen carriers can efficiently capture carbon dioxide and produce high yields of CO2 and H2O under specific operating conditions. Fe3O4 and Fe2O3 are the major components of iron in OCs during most reduction and oxidation reactions. Decreasing oxygen input leads to increased carbon formation in the system.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Amr Abdalla, Mohanned Mohamedali, Nader Mahinpey
Summary: Continuing increase in atmospheric CO2 concentrations has had significant negative impacts on the environment, prompting research efforts to find alternative energy sources to replace fossil fuels. Chemical looping combustion (CLC) has emerged as a promising technology for CO2 capture, and the development of efficient oxygen carriers is crucial for its success. This work provides a comprehensive overview of the advancements in synthetic metal oxide-based oxygen carriers over the past seven years, along with key performance indicators used for evaluation. The review focuses on the development of oxygen carriers such as Ni, Cu, Fe, Mn, Co-based metal oxides, and outlines the challenges, research needs, and opportunities for future progress in this field.
Article
Thermodynamics
Tingting Xu, Cong Jiang, Xun Wang, Bo Xiao
Summary: This study investigated the coproduction of syngas and hydrogen using bio-oil model compound as fuel through the chemical looping reforming coupled with water splitting process. The Ni-Fe bimetallic oxygen carriers showed promising performance, with NFC being a promising option in the CLRWS process, maintaining high hydrogen purity and good stability in multiple cycle tests when steam was present.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Applied
Liangyong Chen, Guoqiang Wei, Kunlei Liu
Summary: The study focuses on investigating the influences of chemical impact, thermal variation, and ageing effect on the microstructure and performance evolutions of ilmenite oxygen carriers. Iron element migration, crystallinity and morphology alterations, and irreversible changes in chemical composition were identified as major aspects responsible for gradual microstructural evolutions of ilmenite oxygen carriers.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Xinyi Chen, Guangsheng Zou, Yanliang Yuan, Zuwei Xu, Haibo Zhao
Summary: The research investigates the use of Ni-doped nano-Fe/Ce oxygen carriers for the chemical looping dry reforming of methane. Thermodynamic analysis and reaction simulation are conducted on the CL-DRM process with iron-based oxygen carriers. The experimental results show that the Ni-doped Fe/Ce oxygen carriers achieve high performance and stable cyclic stability due to the high dispersion of Ni and the transformation of Fe oxides and CeO2.
Article
Energy & Fuels
Theodoros Papalas, Evangelos Palamas, Andy N. Antzaras, Angeliki A. Lemonidou
Summary: This study successfully synthesized bimetallic Ni-Co oxygen carriers with ZrO2 as a structure stabilizer using a one-pot sol-gel auto-combustion method. The redox properties and catalytic activity of the reduced state were evaluated, showing that the reduced bimetallic materials exhibited higher reforming activity and stability compared to monometallic materials, with Co addition promoting the oxidation kinetics.
Article
Energy & Fuels
Shouxi Jiang, Laihong Shen, Jingchun Yan, Xin Niu, Bin Hu
Summary: The study investigated Cu-Fe bimetallic oxygen carriers (OCs) supported by SiO2, Al2O3, or hematite in a fluidized-bed reactor. It was found that CuFe-He and CuFe-Al OCs performed better than CuFe-Si OC, with the latter leading to deactivation due to irreversible interaction. Hematite was identified as an excellent support candidate for manufacturing Cu-Fe OCs. Additionally, maintaining a high O/C ratio and increasing reaction temperature above 850 degrees C promoted coal conversion efficiency in chemical looping combustion.
Article
Energy & Fuels
Ping Wang, Bret Howard, Nicholas Means
Summary: The study reveals that Fe40Cu20 and Fe20Cu40 oxygen carriers exhibit different performances under varying conditions, with Fe20Cu40 showing better results in CLOU compared to Fe40Cu20 in iG-CLC.
Article
Energy & Fuels
Ewelina Ksepko, Rafal Lysowski
Summary: In this study, the applicability of five bimetallic Fe2O3-MnO2 oxygen carriers supported on TiO2 for direct hard coal combustion via chemical looping path was evaluated. The oxygen carriers were prepared by mechanical mixing and high-temperature calcination. The composition of the carriers and the process temperature were found to impact their reactivity with hard coal. The amount of manganese in the carriers positively correlated with their reactivity towards the fuel. It was concluded that the presented oxygen carriers exhibited good physicochemical stability after eight reaction cycles.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Ying Li, Yanan Wang, Kunlei Liu, Haibo Zhao
Summary: This study explores the advantages of Cu/Fe-based composite oxygen carriers in terms of cyclic reactivity and kinetic parameters, providing guidance and optimization methods for the design of low-cost oxygen carriers.
Article
Materials Science, Multidisciplinary
Yanhong Fang, Zhenghao Wang, Chengrui Wang, Huamei Duan, Yandong Li, Guoquan Zhang
Summary: The process of chemical looping partial oxidation of methane (CLPOM) offers advantages of low energy consumption, environmental friendliness, and high quality gas products. The main challenge is finding suitable oxygen carriers that are highly reactive, stable, low cost, and environmentally friendly. This study demonstrates that Fe-2(SiO3)(3) can enhance the reactivity in CLPOM and dramatically increase CH4 conversion by 272% compared to Fe2O3. The optimal conditions for the CLPOM process were determined through calculations, and Fe-2(SiO3)(3) was successfully prepared and showed excellent performance.
Article
Thermodynamics
Husain Al Hashimi, Omar Chaalal
Summary: Metallic tailoring plays a crucial role in chemical looping combustion (CLC) applications. The role of electronegativity of bimetallic carriers upon CLC performance was investigated in this study. Results revealed that a higher electronegativity difference within the bimetallic structure leads to higher reactivity in the iron-based oxide system.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Energy & Fuels
Fang Liu, Weiliao Kang, Chen Song, Zhixuan Jia, Wenbin Chen, Li Yang
Summary: This study conducted experiments to investigate the attrition behavior of an iron-based oxygen carrier under different conditions in chemical looping combustion, revealing the importance of chemical stress on attrition and proposing the attrition mechanism of the oxygen carrier. The results show a dynamic increase process of contribution of chemical stress to attrition and a dominance of chemical stress after a certain number of cycles, indicating the significance of understanding and managing chemical stress in optimizing the performance of chemical looping combustion systems.
Article
Chemistry, Multidisciplinary
Qianwenhao Fan, Chuande Huang, Shibo Xi, Yong Yan, Jijiang Huang, Syed Saqline, Longgang Tao, Yihu Dai, Armando Borgna, Xiaodong Wang, Wen Liu
Summary: This study reports the development of a sintering-resistant MgO-doped Fe2O3 oxygen carrier with superior cyclic stability and high oxygen-carrying capacity. The unique solid solution mixture effectively reduces exergonicity and prevents structural transformations.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Energy & Fuels
Cheng Zhou, Kalpit Shah, Hui Song, Jafar Zanganeh, Elham Doroodchi, Behdad Moghtaderi
Article
Energy & Fuels
Kalpit Shah, Cheng Zhou, Hui Song, Elham Doroodchi, Behdad Moghtaderi
Article
Chemistry, Applied
Ning Yang, Jiang-long Yu, Jin-xiao Dou, Arash Tahmasebi, Hui Song, Behdad Moghtaderi, John Lucas, Terry Wall
FUEL PROCESSING TECHNOLOGY
(2016)
Article
Energy & Fuels
B. Moghtaderi, H. Song
Article
Energy & Fuels
Hui Song, Kalpit Shah, Elham Doroodchi, Behdad Moghtaderi
Article
Energy & Fuels
Hui Song, Kalpit Shah, Elham Doroodchi, Terry Wall, Behdad Moghtaderi
Article
Energy & Fuels
Hui Song, Kalpit Shah, Elham Doroodchi, Terry Wall, Behdad Moghtaderi