Article
Engineering, Environmental
Guicai Liu, Grzegorz Lisak
Summary: This study proposes a new concept of converting plastic waste into high-value products and utilizing CO2 through fast pyrolysis integrated with volatile chemical looping CO2 splitting. Three conversion modes were evaluated, and it was found that the cracking mode with Ni/Al2O3 or Ni/MgAl2O4 catalyst exhibited better performance in fuel conversion and syngas separation. The cracking mode's efficiency increased with higher temperature, but the interaction between Ni and the support limited the full separation of syngas.
CHEMICAL ENGINEERING JOURNAL
(2023)
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, 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
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, Physical
Marwan Laqdiem, Alfonso J. Carrillo, Georgios Dimitrakopoulos, Maria Balaguer, Julio Garcia-Fayos, Ahmed F. Ghoniem, Jose M. Serra
Summary: This study investigates the application of cerium oxide (CeO2) particles in solar-driven thermochemical cycles and explores the effect of doping with other cations on oxygen-vacancy concentration and crystal lattice. The results show that doping can enhance fuel yield and redox oxygen-exchange kinetics.
SOLID STATE IONICS
(2023)
Article
Engineering, Chemical
Anita Haeussler, Stephane Abanades, Julien Jouannaux, Anne Julbe
Summary: The direct one-step splitting of CO2 and H2O using an oxygen-transport membrane (OTM) reactor was studied as a potential way to generate renewable fuels from concentrated solar energy. Operating at high temperature and using composite membranes coated with redox active perovskite materials showed significant enhancements in fuel production rates compared to uncoated ceria membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Applied
Jinchen Ma, Xue Zhang, Peng Peng, Xin Tian, Mengshuang Li, Ying Li, Zuwei Xu, Haibo Zhao
Summary: In this study, LaFeO3 perovskite with an ordered porous structure was synthesized via the sol-gel method and used as an oxygen carrier for chemical looping dry reforming (CLDR) of ethane. The performance and characteristics of the oxygen carrier and the CLDR process were comprehensively investigated. Results showed that LaFeO3 efficiently converted ethane into syngas (H2 and CO), and the deposited carbon on the oxygen carrier could be effectively removed by CO2. The highest C2H6 conversion, CO yield, and CO selectivity were achieved at 800 degrees C and 12,000 L/(kg center dot h).
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Daniel Sastre, Consuelo Alvarez Galvan, Patricia Pizarro, Juan M. Coronado
Summary: Catalytic dry reforming of methane is an effective route for CO2 valorization, while chemical looping processes based on discontinuous cyclic operation show potential advantages in terms of stability and syngas production. The study found that perovskite modified with yttria-stabilized zirconia support achieved higher syngas production in chemical looping operation compared to continuous feed of CH4 and CO2 blend, with stable but moderate activity in the latter.
Article
Energy & Fuels
Liya Zhu, Heng Pan, Shaocong Chen, Youjun Lu
Summary: This study investigates the CO2 splitting characteristics of membrane reactors based on CeO2 and CaTiO3 at high temperatures. The results show that the CaTiO3 membrane reactor can achieve comparable fuel production rates to the state-of-the-art CeO2 membrane reactor under the same conditions, and the CO production rate can be significantly improved by reducing the membrane thickness.
Article
Energy & Fuels
Liya Zhu, Heng Pan, Shaocong Chen, Youjun Lu
Summary: The CO2 splitting characteristics of CeO2 and CaTiO3 membrane reactors under different gas configurations were investigated. The CO production rate of CaTiO3 membrane reactor was significantly improved by reducing the membrane thickness, and oxides with higher oxygen affinity can be applied in high-temperature oxygen permeable membrane reactors.
Article
Energy & Fuels
Cong Yuan, Ge Pu, Jie Gao, Mengliang Gao, Xingqiang Lu
Summary: In this study, Ce-modified BaFe2O4 prepared by the sol-gel method was investigated for gasification performance in a fixed bed experiment. The effects of temperature, steam-to-biomass ratio, oxygen supply coefficient, and Ce loading were analyzed. The optimal oxygen carrier was found to be 6 wt % BaFe2O4 (6Ce-BF) with excellent gasification performance achieved at specific temperature, steam-to-biomass ratio, and oxygen supply coefficient.
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
Energy & Fuels
Sherafghan Iftikhar, Qiongqiong Jiang, Yunfei Gao, Junchen Liu, Haiming Gu, Luke Neal, Fanxing Li
Summary: LaNi0.5Fe0.5O3-δ exhibits excellent redox performance, showing high catalytic efficiency for CO2 splitting and methane partial oxidation. The gradual loss of activity can be addressed by deep oxidation with air, while periodic reactivation of the redox catalyst has been proven to effectively prolong its lifespan.
Article
Chemistry, Physical
Qian Yang, Lihua Chen, Nannan Jin, Yanyan Zhu, Jiahui He, Peijie Zhao, Chuande Huang, Liping Wei, Xiaoxun Ma, Xiaodong Wang
Summary: The potential for carbon deposition over metallic Fe0 severely hampers the enhancement of methane-to-syngas selectivity through chemical looping technology. However, the in-situ formed CeFexAl1_xO3 over ceria-hexaaluminate was found to greatly improve carbon resistance even in the presence of Fe0. This CeFexAl1_xO3/Fe0/hexaaluminate sandwich-like structure provided a convenient pathway for CeFexAl1_xO3 as an oxygen pool to supply sufficient oxygen for timely oxidation of carbon over adjacent Fe0, resulting in outstanding carbon resistance and high CH4 conversion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Xianglei Yin, Laihong Shen, Shen Wang, Baoyi Wang, Cheng Shen
Summary: In this study, high reactivity and coking resistance of the La1-xSrxMn1-yCoyO3+delta oxygen carriers were achieved by adjusting the levels of Co and Sr. The introduction of cobalt provided surface active sites to accelerate methane activation, while Sr doping increased oxygen vacancies for improved oxygen migration. The optimal substitution ratios of Co and Sr were found to be in the ranges of 0.4-0.5 and 0.2-0.4, respectively, with La0.8Sr0.2Mn0.5Co0.5O3+delta showing satisfactory performance and stability in redox tests.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
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
Electrochemistry
Heng Wang, Jianhang Hu, Kongzhai Li, Yu Wang, Feng Zhang, Hua Wang
Summary: The study investigated the effects of MPS, PEG, TU and ETU on copper electrodeposition and found that the additives have inhibitory effects on the process. MPS and PEG inhibit copper deposition through direct adsorption on the cathode surface, while TU and ETU inhibit it through complex intermediate reactions, resulting in flatter and finer-grained deposits. These findings suggest that TU and its derivatives are suitable additives for direct copper electrodeposition at low copper ion concentration.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Energy & Fuels
Chunqiang Lu, Ruidong Xu, Ibrar Khan Muhammad, Xing Zhu, Yonggang Wei, Xianjin Qi, Kongzhai Li
Summary: The behavior of chemical looping reforming of methane over the magnetite oxygen carrier has been studied through thermodynamic analysis and experiments, revealing the importance of appropriate operating conditions and material composition. The study showed that higher temperatures are favorable for desired syngas production, while inhibiting carbon deposition. The research highlighted the significance of thermodynamic analysis in studying the reaction characteristics of chemical looping reforming of methane.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Yi Xing, Hui Zhang, Wei Su, Kongzhai Li, Juan Zhang, Jianwen Shi, Jinglei Tian, Jiaqing Wang
Summary: The novel mineral-derived catalyst showed high efficiency in degrading nitrogen oxides, with sulfuric acid modified catalyst exhibiting high NOx conversion and sulfur resistance, indicating the modification method plays a significant role in the catalytic activity.
JOURNAL OF CLEANER PRODUCTION
(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
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)