Article
Chemistry, Multidisciplinary
Junbu Wang, Zeai Huang, Ying Wang, Jundao Wu, Zhiqiang Rao, Fang Wang, Ying Zhou
Summary: The conversion of methane to syngas is an important route for producing high value-added products. An impregnation method was used to synthesize a NiO-MgO composite, which showed enhanced catalytic activity in converting methane to syngas without gaseous oxidants.
CHINESE CHEMICAL LETTERS
(2022)
Article
Engineering, Chemical
Junbu Wang, Zeai Huang, Zhiqiang Rao, Yunxi Zhang, Wei Hu, Fang Wang, Ying Zhou
Summary: This study investigates the dynamic trends of surface lattice oxygen in the conversion of methane to syngas using transition metal-modified MgO catalysts. The introduction of CuO enhances the combination of methane and surface lattice oxygen, leading to the direct generation of CO. The Cu-MgO catalyst exhibits significantly higher formation rates of H2 and CO compared to the MgO catalyst. These findings provide an efficient strategy for methane conversion using lattice oxygen at mild temperatures.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Applied
Zhonglian Xiao, Xuanyi Wu, Heyun Tan, Shiyou Hao
Summary: Fe-Ce-OH@AR14 was obtained by adsorbing acid red 14 (AR14) on Fe-Ce-OH prepared by codeposition of cerium nitrate hexahydrate, ferric nitrate nonahydrate, and ammonia. Subsequently, FeCeO@C with high photocatalytic efficiency was synthesized by calcinating Fe-Ce-OH@AR14 in N-2. The results of characterization techniques including XRD, Raman, XPS, FT-IR, SEM, PL, and UVevis showed that doping Fe3+ greatly reduced the band gap of CeO2 and carbon loading from the decomposition of AR14 improved carrier life, visible light absorption, and oxygen vacancy concentration. Photocatalytic results using AR14 as a probe molecule indicated that adding 1% ferric nitrate nonahydrate (by mass percentage to cerium nitrate hexahydrate) as a dopant and 25 mL of 0.01 mmol/L AR14 as loading carbon resource improved the photocatalytic efficiency of CeO2.
JOURNAL OF RARE EARTHS
(2023)
Article
Energy & Fuels
Haiming Gu, Xiaobo Cui, Jianqiang Wang, Wanqi Li, Xuyang Wu, Liang Wang, Shanhui Zhao, Zhenghui Qiao, Miaomiao Niu
Summary: Ce-doped and La-doped iron ore as oxygen carriers showed higher reduction reactivity compared to raw iron ore, promoting H-2 production efficiency. Reasonable doping amounts and temperature can enhance oxygen carrier conversion and stability, leading to increased H-2 yield.
Article
Chemistry, Applied
Xinfei Chen, Luwen Wang, Yan Lin, Tao Zeng, Zhen Huang, Yongqi Zhang, Ya Xiong, Jun Li, Lisheng Deng, Hongyu Huang
Summary: Ca2Fe2O5/Zr0.5Ce0.5O2 exhibited excellent reactivity in chemical looping dry reforming of methane. The migration of lattice oxygen during redox process was explored, revealing the release of lattice oxygen, structural change, and crystalline phase transformation. The understanding of oxygen migration provides a reference for improving the cyclic stability of Ca2Fe2O5/Zr0.5Ce0.5O2.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Applied
Xingyun Li, Zhishan Li, Chunqiang Lu, Danyang Li, Zhiqiang Li, Jian Gao, Jiali Wei, Kongzhai Li
Summary: This study proposes a modified NiO/LaFeO3 oxygen carrier to enhance the activity of lattice oxygen in methane partial oxidation. The results demonstrate that the loading of Ni has a significant impact on methane conversion rate and product selectivity, and 5 wt% Ni/ LaFeO3 oxygen carrier exhibits higher methane conversion rate and CO selectivity.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jie Yang, Erlend Bjorgum, Hui Chang, Ka-Ke Zhu, Zhi-Jun Sui, Xing-Gui Zhou, Anders Holmen, Yi-An Zhu, De Chen
Summary: Research has shown that the dynamic nature of active sites on La-Fe-based perovskites in chemical looping methane oxidation is influenced by the Fe coordination environment (and hence the oxygen vacancy concentration), which is the key parameter governing the catalyst selectivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Hongyuan Yang, Guoliang Dai, Ziliang Chen, Jie Wu, Hui Huang, Yang Liu, Mingwang Shao, Zhenhui Kang
Summary: A unique dual metal oxides lattice coupling strategy was proposed to fabricate NiO/CeO2 nanowires arrays, which exhibited excellent electrochemical performance as a precatalyst for oxygen evolution reaction (OER), showing low overpotential and impressive cycle durability. The atomic coupling of CeO2 was found to significantly promote the generation of oxygen vacancies, expedite the phase transformation of NiO, and effectively inhibit the aggregation of NiOOH nanodomains, optimizing the reaction free energy towards oxygen-containing intermediates.
Article
Chemistry, Physical
Xinhe Wang, Stephane Abanades, Srirat Chuayboon, Junshe Zhang, Jinjia Wei
Summary: This study explores the use of a strontium ferrite-calcium manganese oxide nanocomposite as an oxygen carrier for chemical looping reforming of methane in a solar tubular reactor. The nanocomposite exhibits stable performance and higher solar-to-fuel efficiency compared to powder nanocomposites. High temperatures and methane flowrates are required to increase productivity and efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Zhiyuan Yang, Yane Zheng, Kongzhai Li, Yajing Wang, Yuhao Wang, Hua Wang, Yaming Wang, Lihong Jiang, Xing Zhu, Yonggang Wei
Summary: A series of La-Mn-Fe-O perovskite oxides were successfully prepared and used for Chemical-looping reforming of methane. The La0.85MnFe0.15O3-800 showed better structural and thermal stability during 9 cycled reactions.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Energy & Fuels
Kai Yuan, Yane Zheng, Kongzhai Li, Zhiyuan Yang, Hua Wang, Yaming Wang, Lihong Jiang, Xing Zhu, Yonggang Wei, Yuhao Wang
Summary: The study investigates the effects of doping amounts of Ce and Ni ions and calcination temperature on the reactivity of oxygen carriers in chemical looping reforming. The results show that the La_0.6Ce_0.4Fe_0.6Ni_0.4O_3 oxygen carrier calcined at lower temperature displays better resistance to carbon deposition.
Article
Engineering, Chemical
Chenlong Liu, Jing Luo, Hao Dong, Zhihua Zhao, Chenghua Xu, Siddig Abuelgasim, Atif Abdalazeez, Wenju Wang, Dengke Chen, Qianlin Tang
Summary: In this study, iron-based oxygen carriers modified by different ratios of Ca were prepared via the sol-gel method. The hydrogen production performance of these carriers in a fixed-bed system was investigated by reacting them with biomass char. The results showed that the CaFe2O4 sample exhibited excellent hydrogen yield at specific temperature and ratio, and maintained stable performance after cycling experiments.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Abbas Khaleel, Abdul Rasheed Pillantakath, Abdulmuizz Adamson
Summary: Coking is a major cause of catalyst deactivation in catalytic methane reforming processes. Doping the support of Ni/g-Al2O3 catalysts with iron was found to significantly enhance coking resistance in methane partial oxidation, mainly due to the redox functionality of iron after reduction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Juxia Xiong, Ji Yang, Xiao Chi, Kang Wu, Linghe Song, Tan Li, Yun Zhao, Haomin Huang, Peirong Chen, Junliang Wu, Liming Chen, Mingli Fu, Daiqi Ye
Summary: Developing advanced Pd-based catalysts with highly efficient catalytic activity and long-term stability remains challenging. The Pd-Co2NiO4 catalysts prepared in this study exhibited attractive activity and stability for methane complete oxidation. The enhanced catalytic properties were attributed to the modulation of electronic structure and metal-support interactions by PdOx species incorporated into Co2NiO4 lattice and surface.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Green & Sustainable Science & Technology
Haiming Wang, Guicai Liu, Andrei Veksha, Xiaomin Dou, Apostolos Giannis, Teik Thye Lim, Grzegorz Lisak
Summary: The redox performances of iron ore modified with different alkaline earth metals as oxygen carriers for chemical looping combustion of municipal solid waste derived syngas were evaluated. It was found that BaO-modified iron ore demonstrated the best reactivity, and AEM oxides showed superior performance compared to AEM aluminates due to their strong interaction with Fe2O3.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Xuezhu Li, Guiyuan Cai, Yongkui Li, Xing Zhu, Xianjin Qi, Xin Zhang, Bo Shu, Kongzhai Li, Yonggang Wei, Hua Wang
Summary: Using limonite as an in situ solid iron source promotes the crystallization of scorodite for effective arsenic removal from high-arsenic smelting wastewater. This method can precipitate 99.6% of arsenic in the wastewater as environmentally stable scorodite, with the residual arsenic concentration in the filtrate further reduced to 0.1 μg/L through additional treatment with fresh limonite.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Chunqiang Lu, Rongrong Deng, Ruidong Xu, Yannan Zhao, Xing Zhu, Yonggang Wei, Kongzhai Li
Summary: The CeO2/MnCo2O4 oxygen carrier significantly improves the redox stability for methane combustion in Chemical Looping Combustion (CLC). Among different compositions, the 10% CeO2/MnCo2O4 sample shows the highest stability during successive CLC testing, with a methane combustion capacity of 2.22 mmol/g and average methane conversion rate of over 90%.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Zhiyuan Yang, Yane Zheng, Kongzhai Li, Yajing Wang, Yuhao Wang, Hua Wang, Yaming Wang, Lihong Jiang, Xing Zhu, Yonggang Wei
Summary: A series of La-Mn-Fe-O perovskite oxides were successfully prepared and used for Chemical-looping reforming of methane. The La0.85MnFe0.15O3-800 showed better structural and thermal stability during 9 cycled reactions.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Applied
Yane Zheng, Linzhou Zhao, Yajing Wang, Yuhao Wang, Hua Wang, Yaming Wang, Lihong Jiang, Xing Zhu, Yonggang Wei, Kongzhai Li
Summary: La1-xMnCuxO3 perovskites prepared via sol-gel method showed good oxygen mobility and reactivity in chemical looping steam methane reforming process, with high thermal stability and carbon formation resistance. La0.85MnCu0.15O3 and La0.8MnCu0.2O3 exhibited the best performance in terms of syngas productivity and selectivity.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Guixian Deng, Guifang Zhang, Xing Zhu, Qingjie Guo, Xiangbiao Liao, Xi Chen, Kongzhai Li
Summary: The modification of Ni-based catalysts by CeO2 and ZrO2 suppresses the negative effect of O-2, leading to high CH4 and CO2 conversion rates even at high temperatures. The interaction among Ni, CeO2, and ZrO2 results in well-dispersed Ni particles, contributing to long-term catalyst stability and high conversion rates.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Yanhui Long, Kun Yang, Zhenhua Gu, Shen Lin, Danyang Li, Xing Zhu, Hua Wang, Kongzhai Li
Summary: An efficient LaFeO3-based perovskite oxygen carrier doped with a small amount of Ni was designed to preferentially oxidize methane to syngas in COG, increasing the yield of H-2 from water splitting. Experimental and theoretical results demonstrate that the incorporation of Ni cations can greatly improve the activity and stability of the oxygen carrier, reducing the reaction temperature required.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Xianming Cheng, Zhenhua Gu, Fashe Li, Xing Zhu, Yonggang Wei, Min Zheng, Dong Tian, Hua Wang, Kongzhai Li
Summary: Chemical-looping combustion (CLC) is a promising technology for CO2 capture with low energy consumption, but carbon deposition from methane poses a challenge. This study investigated carbon formation behaviors of four typical oxygen carriers (OCs) and proposed a strategy to eliminate carbon by arranging them in a fixed-bed reactor. The findings show that NiO/ZrO2 OC is prone to carbon formation, while CuO/SiO2 OC has high CH4 conversion and minimal carbon formation. Mixing these OCs in a suitable sequence can significantly enhance CLC efficiency and resistance to carbon deposition.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Zhixu Lu, Xianjin Qi, Xing Zhu, Xuezhu Li, Kongzhai Li, Hua Wang
Summary: A method for treating high-arsenic wastewater using red mud was proposed for efficient arsenic removal; RM showed high arsenic removal capacity and stability in wastewater with varying concentrations; it has the potential to treat wastewater containing heavy metals and produce clean water for industrial purposes.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Applied
Zhiqiang Li, Xiangbo Feng, Zhenhua Gu, Chunqiang Lu, Danyang Li, Xing Zhu, Lei Jiang, Guixian Deng, Kongzhai Li
Summary: Adding NiO into CeO2-MgO oxygen carrier significantly enhances the activity for CH4 and CO2 conversion, especially at 800 degrees C. The addition of NiO also improves the selectivity and yield of CO. The formation of CeO2-NiO and NiO-MgO double solid solutions contributes to the stability of the oxygen carrier.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Wenming Liu, Le Li, Sixue Lin, Yiwei Luo, Zhenghong Bao, Yiru Mao, Kongzhai Li, Daishe Wu, Honggen Peng
Summary: Carbon dioxide and methane are major greenhouse gases contributing to global warming, but dry reforming of methane (DRM) can convert them into useful products. However, the coking formation on nickel-based catalysts is a challenge for industrialization. Confined indium-nickel intermetallic alloy nanocatalysts show superior resistance to coking in DRM, with the In0.5Ni@SiO2 catalyst demonstrating the best balance of carbon deposition resistance and reactivity. This study provides guidance on designing high-performance catalysts for methane dry reforming to utilize greenhouse gases efficiently.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiangbiao Liao, Yanhui Long, Yan Chen, Amirali Zangiabadi, Hua Wang, Qinggang Liu, Kongzhai Li, Xi Chen
Summary: A cyclic redox scheme with self-generated Ni nanoparticles/LaFeO3 heterogeneous structure was reported for efficient CO2 utilization at a low temperature of 800 degrees Celsius. The modified LaFeO3 sample showed stable and superior performance with high CO selectivity and CO2 conversion rates, even in the presence of impurities, over 100 redox cycles. The exsolved Ni metal nanoparticles on the perovskite surface served as catalytically active sites for methane conversion and activation of C-O bonds during CO2 reduction.
Review
Chemistry, Multidisciplinary
Dong Tian, Steven R. Denny, Kongzhai Li, Hua Wang, Shyam Kattel, Jingguang G. Chen
Summary: Transition metal carbides and nitrides, as interesting non-precious materials that can replace or reduce the loading of precious metals for catalyzing important electrochemical reactions, have attracted high interest from scientific communities. This review summarizes density functional theory studies, describes reaction pathways, identifies activity and selectivity descriptors, and provides a future outlook for designing carbide and nitride catalysts.
CHEMICAL SOCIETY REVIEWS
(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
Chemistry, Multidisciplinary
Hansheng Xiao, Hua Zhu, Wei Weng, Kongzhai Li, Wei Li, Wei Xiao
Summary: The conversion of carbon dioxide into a hydrogen-evolution electrocatalyst using a molten salt electrochemical method shows efficient modulation of thickness, adhesion, and interfacial confinement. The resulting Mo2C-Mo binder-free electrode displays enhanced electrocatalytic activity towards hydrogen evolution due to lower hydrogen adsorption energy at the Mo2C-Mo interface. This generic method integrates carbon dioxide fixation and surface carbonization of a metal to functional films.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Energy & Fuels
Yanhui Long, Zhenhua Gu, Shen Lin, Kun Yang, Xing Zhu, Yonggang Wei, Hua Wang, Kongzhai Li
Summary: Chemical looping combustion is a new combustion technology that can generate electricity and capture carbon dioxide for the long term. Research indicates that monolithic oxygen carriers exhibit better adaptability at high flow rates, and combining different orders of oxygen carriers can significantly enhance CH4 conversion and CO2 selectivity.
JOURNAL OF THE ENERGY INSTITUTE
(2021)