Article
Energy & Fuels
Chenxi Zhao, Wenjun Zhu, Changhai Liang
Summary: This study investigates the influence of different crystalline ZrO2 supports on the catalytic performance of NiMo/ZrO2 catalyst for hydrodeoxygenation. Monoclinic ZrO2 is found to exhibit better catalytic activity and selectivity. NiMo/m-ZrO2 shows higher hydrogenation conversion and liquid alkanes selectivity, as well as excellent catalytic stability.
Article
Engineering, Environmental
Zhendong Yu, Suhang Xun, Meizan Jing, Haofeng Chen, Weiyu Song, Yanhong Chao, Mohammad Rahmani, Yuxiao Ding, Mingqing Hua, Jian Liu, Wenshuai Zhu
Summary: A 3D assembly TiO2 nanoflower catalyst with controllable oxygen vacancies was developed for oxidative desulfurization (ODS) in diesel oil. The increased oxygen vacancies and Ti3+ promote the chemical adsorption and reduce the energy barriers, leading to the generation of hydroxyl radicals and superoxide radicals. The experiment showed a 100% ODS rate in only 30 minutes under optimal conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Xiaohai Zheng, Panjie Yu, Yaxin Liu, Yongde Ma, Yanning Cao, Zhenping Cai, Linsen Zhou, Kuan Huang, Shoutian Zheng, Lilong Jiang
Summary: This study systematically investigated the hydrogenation of methyl palmitate (MP) to hexadecanol over defect-rich Cu/m-ZrO2 catalysts. It was found that Cu/m-ZrO2-350 catalyst exhibited the best activity for MP hydrogenation due to its highest Cu dispersion, largest number of Cu0 sites, and surface oxygen vacancy concentration. The synergistic effect of Cu species and oxygen vacancies provides insights for the design of efficient catalysts for the conversion of fatty esters to fatty alcohols.
Article
Chemistry, Physical
Lijun He, Yan Zhang, Yuchao Zang, Caixia Liu, Weichao Wang, Rui Han, Na Ji, Shuting Zhang, Qingling Liu
Summary: By modifying the active sites in the La-Ag-Co perovskite catalyst, the catalytic performance was improved, with the formation of active oxygen vacancies. There is synergy between the oxygen vacancies and metal sites, enhancing the catalytic efficiency of the catalyst.
Article
Chemistry, Physical
Jiequan Wang, Xiao Chen, Xiaozhen Chen, Chenxi Zhao, Yu Ling, Changhai Liang
Summary: In this study, a highly efficient non-noble-metal catalyst was developed for hydrodeoxygenation (HDO) of fatty triglycerides into diesel range hydrocarbons. The cobalt-molybdenum bimetallic catalyst with an optimized structure and electronic coordination environment showed excellent conversion efficiency and stability under mild conditions.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Physical
Guobo Li, Kai Shen, Ling Wang, Yaping Zhang, Hongqiang Yang, Peng Wu, Bing Wang, Shule Zhang
Summary: Efficient development of synergistic degradation technology to prevent the emission of chlorinated organics and NOx is a major challenge in environmental chemistry. The multi-active center catalyst (PdV/TiO2) showed excellent efficiency in removing CB and NO, with Pd playing a key role in adsorbing gas molecules and O vacancies structure accelerating gas adsorption and reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Ceramics
Yunting Hou, Lijun Wang, Liuzhen Bian, Qifei Zhang, Li Chen, Kuo-chih Chou
Summary: The gradient doping of high-valence elements into LSF helps to resolve Sr segregation issue and significantly improves the reduction stability and CO2 tolerance of the material. LSFTi5591 exhibits better electrochemical performance due to stronger CO2 adsorption and dissociation compared to LSFNb5591 and LSFMo5591.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Mohammad Yazdanpanah, Mohammad Fereidooni, Victor Marquez, C. V. Paz, Tinnakorn Saelee, Martin Salazar Villanueva, Meena Rittiruam, Patcharaporn Khajondetchairit, Supareak Praserthdam, Piyasan Praserthdam
Summary: Recently, there has been an increased interest in converting bio-derived FAMEs into added-value products. This study focuses on the preparation of catalysts with different levels of oxygen vacancies and their effect on selectivity. The highest level of oxygen vacancy showed the maximum selectivity. Additionally, the rate of ketone formation was found to be directly proportional to acid density.
Article
Energy & Fuels
Kun-Lang Lu, Fan Yin, Xian-Yong Wei, Jia-Hao Li, Zhuang Li, Zi-Chun Fan, Zhi-Min Zong
Summary: In this study, Ni15Co5/ZrO2, Ni15Fe5/ZrO2, and Ni-15/ZrO (2) catalysts were applied for p-cresol deoxygenation. It was found that the introduction of Co or Fe altered the electronic structure of the catalyst surface, leading to different deoxygenation activity and yield.
Article
Chemistry, Physical
Hideo Maruyama, Hideshi Seki, Akito Furukawa
Summary: The adsorption behavior of methyl palmitate on a silica surface in the presence of methanol and toluene was studied, and an adsorption model based on Langmuir type adsorption was proposed. The experimental data matched well with the proposed model, and the equilibrium adsorption constant K correlated with the dielectric constant of each substance. The adsorption parameters were experimentally verified under different conditions.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Haonan Shi, Xiaoyu Gu, Yinteng Shi, Dandan Wang, Sihao Shu, Zhongze Wang, Jixiang Chen
Summary: Porous carbon-encapsulated Ni and Ni-Sn intermetallic compound catalysts were prepared and tested for in-situ hydrothermal deoxygenation of methyl palmitate. Sn doping reduced the size of carbon spheres and the formation of Ni-Sn intermetallic compounds led to larger pore volume and diameter. The synergism between Ni and Sn promoted the hydrogenation of palmitic acid, while the C-C bond hydrolysis and methanation were suppressed on the Ni-Sn intermetallic compounds.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Inyoung Jang, Jiseok Kwon, Chanho Kim, Hyungjun Lee, Sungmin Kim, Heesung Yoon, Ungyu Paik, Taeseup Song
Summary: As concerns related to climate change grow, studies on materials enhancing energy conversion/storage systems have increased. In this study, perovskite structures with high oxygen vacancy ratios have been explored as electrocatalysts for oxygen reduction reaction (ORR). Through synthesizing materials with different structures but the same cation stoichiometry, it was found that the layered perovskite structure exhibited superior electrochemical performance compared to the cubic structure, showing higher ORR activity at high and room temperatures. Furthermore, perovskite hybridized with nitrogen-doped reduced graphene oxide (N-rGO) compensated for the shortcomings of perovskite oxide and exerted catalytic synergy.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Tongfei Yang, Pengrong Ren, Xiangcheng Qi, Xin Wang, Qingnan Meng, Zhiyong Liu, Shu Yang
Summary: In this study, NaNbO3 powders were prepared using a hydrothermal method. The particle size of NaNbO3 decreased unexpectedly with increasing reaction temperature, indicating a nucleation-dominated growth mechanism. The sample reacted at 210 degrees C for 12 h showed the highest piezoelectric catalytic efficiency. The annealing of NaNbO3 powders in N2 increased the concentration of oxygen vacancy, as confirmed by impedance and XPS spectra. Simulation results showed that under the influence of oxygen vacancies, valence electrons of A-site Na cations on the surface were more easily excited to the conduction band compared to Nb cations, resulting in a more than 6 times increase in piezoelectric catalytic efficiency.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
N. Asikin-Mijan, G. AbdulKareem-Alsultan, M. S. Mastuli, A. Salmiaton, Mohamad Azuwa Mohamed, H. V. Lee, Y. H. Taufiq-Yap
Summary: Bifunctional Co-W catalysts were prepared for the catalytic deoxygenation-cracking of tung oil to produce jet fuel fractions. The CoW/SA catalyst showed the highest activity and outperformed the monometallic Co and W catalysts. It was found that excessively high metal dosages led to over cracking, while lower metal dosages effectively controlled over cracking. The resulting TO-jet fuel had excellent physicochemical properties and combustion characteristics.
Review
Chemistry, Physical
Yuanyuan Ma, Zhimin Tian, Wenfang Zhai, Yongquan Qu
Summary: CeO2 nanozymes with tailorable surface physicochemical properties exhibit diverse catalytic behaviors under different conditions, showing potential for disease diagnosis and treatments.
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)