Article
Chemistry, Physical
Li Ma, Yu Qiu, Min Li, Dongxu Cui, Shuai Zhang, Dewang Zeng, Rui Xiao
Summary: A new study proposed using YSZ supported Fe2O3 to prepare oxygen carrier materials, demonstrating high reactivity and stability. The Fe2O3/YSZ20 composite showed high hydrogen yield and production rate, outperforming Fe2O3/Al2O3. Additionally, transient pulse test indicated that active oxygen diffusion was the rate-limiting step during the redox process.
GREEN ENERGY & ENVIRONMENT
(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
Energy & Fuels
Zhong Ma, Yonggang Lu, Guofu Liu, Hui Zhang
Summary: By doping with Sr, the redox activity and cyclic stability of hematite in chemical looping combustion (CLC) were significantly improved. Sr could enhance the sintering resistance of hematite and 5 wt% SrO doping was found to be the optimal ratio. High temperature calcination also enhanced the redox activity of Sr-doped hematite.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Energy & Fuels
Ivana Stanicic, Emil Ola Lidman Olsson, Hao Wu, Peter Glarborg, Inaki Adanez-Rubio, Henrik Leion, Tobias Mattisson
Summary: In this study, the interaction between zinc compounds and ilmenite particles was investigated by exposing three types of ilmenites to gas-phase Zn and ZnCl2. The results showed that the gaseous conditions, particle ash layer composition, and iron availability played an important role in the interaction between zinc compounds and ilmenite particles.
Article
Chemistry, Applied
Olena Vozniuk, Thomas Cacciaguerra, Nathalie Tanchoux, Stefania Albonetti, Lorenzo Stievano, Jean-Marc M. Millet, Nicolas Bion, Francesco Di Renzo, Fabrizio Cavani
Summary: Copper-manganese spinel ferrites were evaluated as solid oxygen carriers for hydrogen production from water. The nature of the oxygen carrier phases greatly affected the amount and purity of hydrogen produced. Cu-rich ferrites were reduced to metallic copper and iron carbides, while Mn-rich ferrites were less deeply reduced to manganowustite. The oxidation reactions of ethanol by Cu-ferrites mainly produced CO and CO2, while Mn-ferrites mainly formed oxydehydrogenation products. The production of CO and CO2 during the reoxidation negatively affected the purity of the hydrogen formed.
Article
Chemistry, Multidisciplinary
Shailesh Singh Sikarwar, Ramsagar Vooradi, Venkata Suresh Patnaikuni, Manohar Kakunuri, Kiran Donthula
Summary: Chemical looping combustion (CLC) is a promising combustion technology with low-energy penalty and the ability for 100% CO2 capture. The nanostructured oxygen carriers (OCs) in nanoscale CLC offer inherent advantages, but cyclic stability at high transition metal oxide loadings is crucial for its successful adoption.
Article
Chemistry, Physical
Qiming Tang, Yuxi Ma, Kevin Huang
Summary: FeOx is commonly used in CLH reactors and SOIARBs due to its abundance, low cost, and high oxygen content. However, the reduction kinetics of FeOx limits the performance of Fe/FeOx chemical looping cycles. This study investigates the kinetics of Fe3O4 reduction and highlights the crucial role of ZrO2 in preventing Fe particle sintering and ensuring stable operation of chemical looping cycles.
ACS APPLIED ENERGY MATERIALS
(2021)
Review
Chemistry, Physical
Wenxi Chang, Yue Hu, Weibin Xu, Chuande Huang, Haonan Chen, Jiahui He, Yujia Han, Yanyan Zhu, Xiaoxun Ma, Xiaodong Wang
Summary: Chemical looping water-splitting (CLWS) technology is an energy-efficient and environmentally friendly method for hydrogen production. The key lies in selecting suitable oxygen carriers (OCs). This review discusses recent advances in designing OCs and emphasizes the crucial parameters that determine their redox performance and future challenges.
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
Engineering, Environmental
Avishek Goel, Arnold Ismailov, Elyas M. Moghaddam, Chao He, Jukka Konttinen
Summary: Biomass Chemical Looping Gasification (BCLG) is a cost-effective and efficient alternative to conventional gasification. The study investigated various oxygen carriers (OCs), including industrial wastes, residential waste, and natural ore, and evaluated their reactivity, selectivity, material strength, and sintering behavior. Nickel slag calcined at 1100 degrees C was identified as the most promising OC material for BCLG, with optimal reactivity, selectivity, material strength, and minimal sintering.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Da Song, Yan Lin, Chengyang Li, Shiwen Fang, Fang He, Zhen Huang, Zengli Zhao, Ya Xiong, Hongyu Huang
Summary: Chemical looping technology is a promising approach in various fields and has been extensively studied for over two decades. The migration and transformation of lattice oxygen play a crucial role in chemical looping processes. This article reviews recent advances in exploring the migration mechanism of lattice oxygen, with a focus on structure-activity relationships.
Article
Engineering, Chemical
Junru Liu, Rui Hu, Xinlei Liu, Qunfeng Zhang, Guanghua Ye, Zhijun Sui, Xinggui Zhou
Summary: This study proposes, models, simulates, and optimizes a redox process that combines propane dehydrogenation with selective hydrogen combustion. The results show that the redox process can significantly increase propylene yield compared to the conventional process. The optimized operating conditions are a feed temperature of 973 K, a feed pressure of 0.1 MPa, an H2/C3H8 mole ratio of 0.15, and a mass fraction of 0.5 for the PDH catalyst.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Jie Gao, Ge Pu, Pengcheng Wang, Cong Yuan, Shuaihui Jia
Summary: This study improved the performance of NiFe2O4 oxygen carrier by doping Ce and loading inert carrier support, increasing hydrogen production efficiency and stability.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
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)
Article
Engineering, Environmental
Runxia Cai, Leo Brody, Yuan Tian, Luke Neal, Arnab Bose, Fanxing Li
Summary: Chemical looping oxidative dehydrogenation (CL-ODH) has the potential to replace steam cracking for ethylene production. Accurate reactor modeling is crucial for scaling up and optimizing this new technology. A one-dimensional packed bed model was used to simulate the CL-ODH of ethane to ethylene, and the results were validated by experiments. Overall, this study provides insights for efficient and optimized operation of CL-ODH reactors.
CHEMICAL ENGINEERING JOURNAL
(2023)