Review
Chemistry, Multidisciplinary
Junchen Liu, Fanxing Li
Summary: Chemical looping combustion (CLC) has been extensively studied as a promising method for power generation and carbon capture. The strategy can be applied beyond combustion and can result in unexpected energy and carbon dioxide savings. The design of effective oxygen carriers is crucial for selective chemical conversion. Mixed oxides can be used as multi-function reaction media in chemical looping catalysis (CLCa) and have potential applications in chemical production.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yongcheng Cai, Chenxuanzi Wang, Mingxuan Zhong, Zewei Zhang, Bo Xiao, Tingting Xu, Xun Wang
Summary: In this study, Ca2Fe2O5 oxygen carrier was prepared by the sol-gel method and its reduction and oxidation kinetics were evaluated in H2 and CO2 atmospheres, respectively. The reduction process of Ca2Fe2O5 followed a random nucleation and growth model, while the oxidation process followed a zero-order contraction model. The kinetics analysis showed that both the reduction and oxidation processes of Ca2Fe2O5 were one-step reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Felix Donat, Agnieszka Kierzkowska, Christoph R. Muller
Summary: In chemical looping, using Fe and Co as the main and side reaction metals can effectively reduce the extent of carbon deposition and improve the catalytic effect of oxygen carriers on methane decomposition.
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
Chemistry, Applied
Zhong Ma, Guofu Liu, Yonggang Lu, Junfeng Wang, Hui Zhang
Summary: This study investigated the effect of doping different metals onto iron-based oxygen carriers, finding that Sr could effectively enhance the stability of the oxygen carriers, while Ce and La had weaker effects. The research provides guidance for the preparation of iron-based oxygen carriers with high redox performance.
FUEL PROCESSING TECHNOLOGY
(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
Energy & Fuels
Richard A. Newby, Dale L. Keairns, Robert W. Stevens
Summary: The objective of this study was to estimate the cost of commercial production of oxygen carriers (OCs) for large-scale application in the chemical looping combustion (CLC) power generation industry. Two production facility scenarios were considered, and two OC production techniques were addressed. The estimated OC product costs can be used to guide development and determine the maximum OC makeup rate for achieving a designated cost-of-electricity (COE) reduction goal.
Article
Chemistry, Applied
Alberto Abad, Teresa Mendiara, Maria T. Izquierdo, Luis F. de Diego, Francisco Garcia-Labiano, Pilar Gayan, Juan Adanez
Summary: This study evaluated the potential of different manganese-titanium mixed oxides to release oxygen and regenerate in air, as well as the reactivity of the mixed oxide samples to main fuel gases. Results indicate that these materials have the potential to serve as low-cost and environmentally friendly oxygen carriers.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Applied
M. T. Izquierdo, F. Garcia-Labiano, A. Abad, A. Cabello, P. Gayan, L. F. de Diego, J. Adanez
Summary: This study evaluated the stability of a CuO/Al2O3 impregnated oxygen carrier during methane chemical looping combustion at high oxygen carrier to fuel ratios. The research found that low oxygen carrier conversion variation reduced copper loss from particles, but reoxidizing the oxygen carrier at high temperatures was difficult due to the formation of CuAlO2. Operating at temperatures around 800 degrees C with low solid conversion variation is recommended to limit copper loss while maintaining physical stability.
FUEL PROCESSING TECHNOLOGY
(2021)
Review
Energy & Fuels
Guicai Liu, Grzegorz Lisak
Summary: This review summarizes the basic properties and opportunities of Cu-based OCs in various chemical looping processes. It covers the applications of Cu-based OCs in chemical looping combustion (CLC), chemical looping oxygen uncoupling (CLOU), chemical looping air separation (CLAS), chemical looping for syngas/H2 production, integrated CaO/CuO looping process, and thermochemical energy storage (TCES). The review also discusses the technical challenges and current strategies related to agglomeration, attrition, and ash accumulation. It provides insights and guidance for the design and development of Cu-based OCs and their applications in chemical looping processes.
Article
Thermodynamics
Zhong Ma, Guofu Liu, Hui Zhang, Shuai Zhang, Yonggang Lu
Summary: This study investigated two pyrite cinder samples as oxygen carriers, and found that Pc-2 sample exhibited excellent redox performance and anti-sintering ability, making it a potential oxygen carrier. Additionally, it was observed that Pc-1 sample was prone to deactivation and surface sintering in multiple cycle experiments.
Article
Engineering, Environmental
Lei Liu, Zhenshan Li, Zuoan Li, Yngve Larring, Ningsheng Cai
Summary: This study investigates the effect of SO2 on the redox kinetics of a CaMn0.375Ti0.5Fe0.125O3-delta perovskite oxygen carrier, revealing that SO2 has minimal impact on reduction reactivity at high temperatures but decreases oxidation reactivity. The sulfur mainly exists in the form of sulfates/sulfides on the particle surface, leading to sulfur poisoning effect during oxidation and reduction processes.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Clemens F. Patzschke, Matthew E. Boot-Handford, Qilei Song, Paul S. Fennell
Summary: The study found that copper manganese spinel oxides are promising oxygen carriers for the CLOU and CLAS processes due to their high O-2 release capacity and fast release kinetics. Material properties of oxygen carriers can be improved by adjusting Cu:Mn ratios and synthesis conditions to optimize performance. After extended cycling tests, the oxygen carriers showed excellent stability and high resistance to attrition.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Ming Luo, Lunzheng Zhou, Cao Kuang, Chao Wang, Haiyan Zhang
Summary: Chemical-looping combustion (CLC) technology is an efficient solution for fuel conversion with CO2 separation, with sulfur being a major consideration in coal utilization. The study investigated the release and fate of pyritic sulfur in the CLC process. SO2 was the dominant sulfurous gas released and metal sulfides were confirmed to be present in the oxygen carriers, affecting the sulfur conversion in both reduction and reoxidation stages.
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
Yuan Tian, Phillip R. Westmoreland, Fanxing Li
Summary: The reduction kinetics and stability of Na2MoO4-promoted CaMn0.9Ti0.1O3 were investigated for its application in CL-ODH of ethane, showing promising results with excellent selectivity towards hydrogen combustion. The addition of Na2MoO4 effectively suppressed C2H4 combustion relative to H2 oxidation, making it a potential alternative for ethylene production. The core-shell structure of CaMn0.9Ti0.1O3@Na2MoO4 was well-maintained with deep reduction, demonstrating excellent performance after 50 redox cycles.
Article
Chemistry, Applied
Sherafghan Iftikhar, William Martin, Yunfei Gao, Xinbin Yu, Iwei Wang, Zili Wu, Fanxing Li
Summary: The study investigates LaFe1_xNixO3_delta redox catalysts for CO2 utilization and production of syngas. Different compositions of LaFe1_xNixO3_delta were prepared and tested, showing favorable reactive performance. The flexibility of the catalysts to produce syngas or hydrogen with tunable compositions depends on the iron/nickel ratio. The stability and performance of the redox catalysts were proven over multiple cycles.
Article
Food Science & Technology
Ying Feng, Zhangkai Cheng, Xianhu Wei, Moutong Chen, Jumei Zhang, Youxiong Zhang, Liang Xue, Minling Chen, Fan Li, Yuting Shang, Tingting Liang, Yu Ding, Qingping Wu
Summary: In this study, a novel method that combines metabolomics with deep learning was developed for the detection and identification of Listeria monocytogenes. By establishing a convolutional neural network model and using a pseudotargeted metabolomics approach, high prediction accuracies were achieved and different Listeria species were successfully distinguished. This is a promising powerful tool for the detection and classification of pathogens.
Article
Chemistry, Physical
Jian Dou, Joey Funderburg, Kunran Yang, Junchen Liu, Dennis Chacko, Kui Zhang, Adam P. Harvey, Vasudev P. Haribal, S. James. Zhou, Fanxing Li
Summary: CO2-assisted oxidative dehydrogenation of propane (CO2-ODH) is a promising method for propylene production and CO2 utilization. This study focuses on designing CexZr1-xO(2)-mixed oxide-supported CrOx catalysts for CO2-ODH with enhanced selectivity and stability. The addition of Ce to the ZrO2 support greatly improves catalyst stability by enhancing coke resistance.
Article
Nanoscience & Nanotechnology
Siyuan Zhu, Yufeng Chen, Vasishta Somayaji, Peter Novello, Dennis Chacko, Fanxing Li, Jie Liu
Summary: High entropy oxide (HEO) is a promising catalyst support for various chemical reactions due to its tunable composition-function properties. In this study, highly dispersed rhodium nanoparticles were successfully synthesized on HEO using a one-step glycine-nitrate-based combustion method. The resulting catalyst exhibited significantly higher selectivity and activity in CO2 hydrogenation compared to rhodium nanoparticle-based catalysts. The high CO selectivity was attributed to the presence of copper and zinc in the HEO support, which weakened the *CO binding strength and formed a strong metal-support interaction.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Runxia Cai, Hilal Bektas, Xijun Wang, Kyle McClintock, Lauren Teague, Kunran Yang, Fanxing Li
Summary: This paper reports a high-throughput combinatorial approach for accelerated development and optimization of perovskite oxides for thermochemical energy storage. Promising candidates are selected based on thermodynamic screening criteria and DFT simulation results. The experimental results confirm the effectiveness of the high-throughput approach in determining key properties of perovskite oxides.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Vahid Rahmanian, Tahira Pirzada, Eduardo Barbieri, Sherafghan Iftikhar, Fanxing Li, Saad A. Khan
Summary: We have developed a robust method for creating polyvinylpyrrolidone (PVP)-titania (TiO2) nanofibrous aerogels (NFA) with multifunctional and triggered performances. These 3D self-supported aerogels have low density and high porosity, and are fabricated through solid templating of sol-gel electrospun PVP-TiO2 hybrid nanofibers. The aerogels exhibit photocatalytic activity, antibacterial properties, ability to sorb volatile organic compounds (VOCs) and oils, as well as excellent thermal insulation and mechanical flexibility.
APPLIED MATERIALS TODAY
(2023)
Article
Energy & Fuels
Leo Brody, Mahe Rukh, Runxia Cai, Azin Saberi Bosari, Reinhard Schomaecker, Fanxing Li
Summary: Sorption-enhanced steam reforming (SESR) of toluene using A- and B-site doped Sr(1-x)A'(x)Fe1-yB'(y)O3-delta perovskites in a chemical looping scheme shows promise in converting aromatic tar byproducts into hydrogen-rich syngas. Impregnating Ni on the perovskite surface improves toluene conversion, and a dual bed configuration enhances cyclic CO2 capture and release for H2-rich product syngas.
JOURNAL OF PHYSICS-ENERGY
(2023)
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)
Article
Chemistry, Applied
Yuan Tian, Zoe Benedict, Fanxing Li, Yingchao Yang, Debtanu Maiti, Yixiao Wang, Rebecca Fushimi
Summary: In the context of energy and environment, finding energy efficient routes for chemical manufacturing and reducing greenhouse gas emissions is crucial. This study presents a pathway for continuous syngas production through chemical looping conversion of CH4 and CO2. The chemical looping approach mitigates catalyst deactivation and improves energy efficiency. The study explores the structure-function relationships of catalysts and demonstrates the activation of CH4 over Ni-promoted samples. The findings highlight the potential of chemical looping reactors for efficient syngas production from waste greenhouse gases.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Chongyan Ruan, Ryota Akutsu, Kunran Yang, Noha M. Zayan, Jian Dou, Junchen Liu, Arnab Bose, Leo Brody, H. Henry Lamb, Fanxing Li
Summary: A two-step solar thermochemical hydrogenation process for furfural upgrading is developed, which sources hydrogen directly from water and concentrated solar radiation. The catalytic performance achieved in this process is significantly higher than that of state-of-the-art catalytic hydrogenation method, with up to two-orders-of-magnitude-higher hydrogen utilization efficiency. The active sites for furfural adsorption and water dissociation are provided by a metal or reduced metal oxide, eliminating the barriers to hydrogen dissolution and the subsequent dissociation at the catalyst surface. The hydrogenation selectivity can be conveniently mediated by solvents with different polarity and metal/reduced metal oxide catalysts with varying oxophilicity. This work offers an efficient and versatile strategy for bio-oil upgrading and a promising pathway for renewable energy storage.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xiaojiao Yuan, Kunran Yang, Chloe Grazon, Cong Wang, Lorenzo Vallan, Jean-David Isasa, Pedro M. Resende, Fanxing Li, Cyril Brochon, Hynd Remita, Georges Hadziioannou, Eric Cloutet, Jian Li
Summary: The relationship between the aggregation of 4,7-bis(thiophen-2-yl) benzothiadiazole (TBT)-based conjugated trimers and their photocatalytic activity was systematically investigated by methyl side-chain engineering. TBT-3 with the smallest size of aggregates and highest crystallinity exhibit the highest photocatalytic H2 evolution activity, which is due to the shorter charge carrier transport distance and solid long-range order.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Vahid Rahmanian, Muhammed Ziauddin Ahmad Ebrahim, Seyedamin Razavi, Mai Abdelmigeed, Eduardo Barbieri, Stefano Menegatti, Gregory N. Parsons, Fanxing Li, Tahira Pirzada, Saad A. Khan
Summary: This study presents a novel method for synthesizing metal-organic frameworks (MOFs) on 3D-structured nanofibrous aerogels (NFAs). The resulting hybrid aerogels exhibit promising applications in CO2 adsorption, heavy metal removal, and antibacterial properties.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Sherafghan Iftikhar, William Martin, Xijun Wang, Junchen Liu, Yunfei Gao, Fanxing Li
Summary: This study reports the use of AxA '1-xByB '1-yO3-delta perovskite oxide materials as redox catalysts for CO2 splitting and methane partial oxidation. DFT calculations and experimental investigation were used to optimize and validate the performance of these catalysts. Impregnation of 1 wt% ruthenium was found to significantly improve the redox kinetics, and air treatment was effective in reactivating the catalyst. The study provides a strategy for CO2 utilization and suggests approaches to enhance the redox kinetics and long-term catalyst performance.
Article
Chemistry, Multidisciplinary
Zachary S. Campbell, Steven Baro, Yunfei Gao, Fanxing Li, Milad Abolhasani
Summary: A generalizable and versatile microfluidic approach for the synthesis of various metal oxide microparticles using atypical metal-organic precursors is reported. Different types of microparticles, such as zinc oxide, tin oxide, cerium oxide, and lanthanum praseodymium oxide, were successfully synthesized, and the composition and crystal phase of tin oxide can be controlled by adjusting the annealing temperature.
