Article
Chemistry, Multidisciplinary
KeFa Sheng, Kai Cui
Summary: The influence of different calcination temperatures on the catalytic performance of Ni-Al2O3 catalyst was comprehensively studied. A rod-like Ni-Al2O3-700 catalyst with excellent resistance to carbon deposition and sintering was successfully created, providing a new strategy for constructing structured and high-performance Ni-based catalysts.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Xingru Yan, Shuo Huang, Fan Yang, Siyuan Sun, Ge Zhang, Bo Jiang, Bing Zhang, Sai Che, Wang Yang, Yongfeng Li
Summary: A high-performance and non-noble metal hydrogen evolution reaction (HER) electrocatalyst (Ni2P/PC) was developed using a facile hydrothermal synthesis, demonstrating excellent electrocatalytic activity. The PC substrate successfully adjusted the electron density of Ni2P, leading to improved catalyst performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Peng Cao, Bo Yan, Yuting Chu, Shiwei Wang, Hongbo Yu, Tong Li, Chunrong Xiong, Hongfeng Yin
Summary: Pd/SiO2 catalysts with highly dispersed palladium nanoparticles were prepared using different methods, with samples obtained via strong electrostatic adsorption (SEA) and charge-enhanced dry impregnation (CEDI) showing higher palladium dispersions. Key factors affecting palladium dispersion in the Pd/SiO2-SEA samples include surface loading, pH regulator, Pd loading, and reduction temperature.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Qinglong Liu, Qiuna Zhao, Mingsheng Luo, Zhi Yang, Fengli Wang, Hong Li
Summary: Catalytic oxidation of toluene-bearing VOCs can be effectively achieved using Co-grafted dendritic mesoporous silica nanospheres. The catalysts exhibit superior micro-structure, high dispersion of CoOx species, and proper metal-support interaction. The presence of moisture negatively affects the catalytic activity but this effect is reversible. Introducing Pd into the catalysts significantly enhances the catalytic performance by influencing the oxygen activation and toluene adsorption synergistic effect.
MOLECULAR CATALYSIS
(2022)
Article
Multidisciplinary Sciences
Zhenzhen Liu, Helong Li, Xueying Gao, Xuan Guo, Shuizhong Wang, Yunming Fang, Guoyong Song
Summary: Producing monomeric phenols from lignin biopolymer depolymerization in a detachable and efficient manner has attracted significant attention for the fullest utilization of sustainable lignocellulosic biomass. In this study, a low-loaded and highly dispersed Ru anchored on a chitosan-derived N-doped carbon catalyst (RuN/ZnO/C) is reported. This catalyst exhibits outstanding performance in the reductive catalytic fractionation of lignocellulose, achieving nearly theoretical maximum yields of phenolic monomers from lignin. The selectivity towards propyl end-chained guaiacol and syringol allows for easy purification, and the process leaves high retention of (hemi)cellulose for enzymatic hydrolysis. The good stability and transformation of Ru species contribute to the effectiveness of the catalyst. Time-course experiments and reactivity screening shed light on the mechanism. Overall, this work opens up new possibilities for the valorization of lignin and the economic feasibility of lignocellulosic biomass.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Chao Feng, Yunxia Wang, Chong Chen, Xueqing Fu, Yuan Pan, Hongchuan Xin, Zhong Wang, Yukun Lu, Xuebing Li, Runduo Zhang, Yunqi Liu
Summary: A limited pyrolysis oxidation strategy was used to prepare Pd-Mn3O4 spinel catalysts with uniform morphology and active component dispersion. The Pd-Mn3O4 catalyst with a Pd/Mn ratio of 1.08 showed the highest catalytic efficiency with a T90 value of 240 degrees C. The strong metal-support interaction (SMSI) effect between Pd and Mn3O4 promoted the redistribution of surface charges, enhanced the oxidation-reduction ability of the active sites, and improved the migration and generation of active surface oxygen species.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Teng Liu, Xuefeng Bai
Summary: In this study, a simple and environmentally friendly nitrogen glow discharge plasma reduction method was developed for synthesizing palladium nanoparticles supported on exfoliated Mg-Al-layered double hydroxide catalysts, achieving highly dispersed PdNPs loading. Nitrogen plasma treatment improved the catalytic performance of the catalysts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Applied
Zhaolu Feng, Xuefeng Bai
Summary: Highly dispersed Pd/KIT-6 catalysts were prepared via inorganometallic chemical adsorption and sonochemical reduction, exhibiting excellent performance in the dehydrogenation of dodecahydro-N-ethylcarbazole with a high efficiency of 97.4% and maintaining above 95% efficiency after 10 cycles.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Mohnnad H. Alabsi, Xingzhu Chen, Xilong Wang, Maolin Zhang, Adrian Ramirez, Aijun Duan, Chunming Xu, Luigi Cavallo, Kuo-Wei Huang
Summary: A Pd-2.0/CZZ catalyst with dendritic morphology and highly dispersed Pd was prepared for efficient methanol synthesis from CO2 hydrogenation. The high dispersion of Pd on the support plays a crucial role in enhancing reaction pathways and improving product selectivity and catalytic activity.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Xinyi Miao, Fengwu Tian, Miaomiao Bai, Yujia Zhang, Wei Wang, Zuoping Zhao, Xianzhao Shao, Xiaohui Ji
Summary: In this study, a simple and effective strategy using NH2-functionalized, phosphorous-doped glucose-based porous carbon supported Pd nanoparticles was reported for promoting the reactivity of formic acid. The system exhibited exceptional catalytic activity, selectivity, and stability, producing CO-free hydrogen gas efficiently.
Article
Materials Science, Multidisciplinary
Congcong Shen, Yinhui Yang, Xiaolu Wu, Yanan Liu
Summary: In this study, Pd/ZnFe2O4 nanocomposites were successfully prepared and applied in the hydrogenation of styrene. The results showed that Pd/ZnFe2O4 could effectively convert styrene into ethylbenzene without the formation of byproducts or derivatives. Kinetic studies also indicated that the hydrogenation reaction followed a zero-order kinetics model.
Article
Chemistry, Multidisciplinary
Jagdish C. Bhangoji, Ulka B. Suryavanshi, Gurudas P. Mane, Gurmeet C. Wadhawa, Nagesh D. Pawar, Suresh S. Shendage
Summary: Uniform dispersion of Pd nanostructures supported on hydrothermally synthesized bimetal oxides on Ni foam substrate was achieved using an electrochemical approach. The resulting nanocomposite materials exhibit superior electro-catalytic performance for ethanol sensing applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Zhicheng Wang, Tao Xu, Dingding Tang, Yan Zhou, Bijuan Zheng, Yicheng Qiu, Dongkai He, Xiang Zeng, Rui Jiang, Xuhui Mao
Summary: Citric acid-modified Al2O3 spheres were used as a support for loading iron species, resulting in a highly dispersed and high-performance Fe-III/CA-Al2O3 catalyst.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Yaohan Chen, Yonggang Li, Lei Dai, Guorui Qin, Jing Guo, Qifeng Zhang, Shenghai Li, Tauqir A. Sherazi, Suobo Zhang
Summary: An innovative method was developed to prepare porous organic polymer membranes through interfacial azo-coupling polymerization. These membranes, with plenty of anchoring sites for loading Pd nanoparticles, served as membrane reactors and exhibited high-performance catalytic reduction with a flux of 27.3 t m(-2) day(-1). These membranes also showed good long-term stability due to almost zero Pd leaching.
CHEMICAL COMMUNICATIONS
(2021)
Article
Engineering, Chemical
Hatem M. Altass, Moataz Morad, Abd El-Rahman S. Khder, Mohammed A. Mannaa, Rabab S. Jassas, Abdulrahman A. Alsimaree, Saleh A. Ahmed, Reda S. Salama
Summary: Pd nanoparticles were successfully dispersed on rGO@Cu-BTC nanocomposite surface, showing excellent catalytic activity for CO oxidation. The presence of rGO played a vital role in the dispersion of Pd NPs on the catalyst surface, leading to higher catalytic activity compared to catalyst without rGO.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Physical
Zifei Yan, Yunpeng Hu, Chencan Du, Jian Deng, Kai Wang, Guangsheng Luo
JOURNAL OF CATALYSIS
(2020)
Article
Chemistry, Multidisciplinary
Jian Deng, Pengcheng Zou, Kai Wang, Guangsheng Luo
JOURNAL OF FLOW CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
JiaYu Hu, Jiaxin Tian, Kai Wang, Jian Deng, Guangsheng Luo
Review
Engineering, Chemical
Zifei Yan, Jiaxin Tian, Kai Wang, Krishna D. P. Nigam, Guangsheng Luo
Summary: Microreaction processes are increasingly utilized in the synthesis and utilization of epoxide compounds due to their excellent characteristics such as high safety, rapid reactant mixing, and high mass transfer rates. The catalyst loading strategies and transfer characteristics of heterogeneous catalytic microreactors are discussed to illustrate the essence of process intensification in microflow reactors. Strengths and further challenges are proposed to provide a perspective for the development of microreaction technology in the epoxide industry.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Chemical
Xiao Liang, Xueying Wang, Shiyao Lu, Kai Wang, Guangsheng Luo
Summary: Locally constrictive microchannels are effective for droplet break-up in microfluidic processes. This study used pressure drop analysis to experimentally investigate droplet break-up flow, confirmed by Fourier transform analysis. The effects of surfactant concentration, fluid flow rate, and viscosity on droplet break-up were studied, along with the additional hydrostatic energy cost for droplet stretching and deformation.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Chunli Han, Jian Deng, Kai Wang, Guangsheng Luo
Summary: The formation process of monodispersed polysilsesquioxane (PSQ) spheres was revealed for the first time, showing a four-stage mechanism including rapid hydrolysis and growth, formation of aggregates, dispersed particle growth, and slow growth to form monodispersed PSQ spheres. The reversibility of reactions led to the transformation of unstable particles into hydrolytic monomers/oligomers.
Article
Engineering, Chemical
Jiaxin Tian, Chencan Du, Kai Wang, Jian Deng, Guangsheng Luo
Summary: This paper investigates the characteristics of mainly involved reactions and constructs the main reaction network for MBTS synthesis with H2O2 as an oxidant. Several general principles are provided for the controllable preparation of MBTS.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Mechanics
Yi Zong, Min Li, Kai Wang
Summary: This article introduces a new outflow boundary condition for the color gradient model in the multiphase lattice Boltzmann method, based on the phase ratio equation and utilizing the Zou-He boundary condition. Experimental results demonstrate that this new boundary condition can effectively enhance pressure stability and mass conservation characteristics.
Article
Chemistry, Multidisciplinary
Kai Cheng, Shiyao Lu, Kai Wang, Guangsheng Luo
Summary: Using CO2 as terminator, n-hexane as antisolvent, and a flow ROP reactor, a green and sustainable synthetic route for poly(delta-valerolactone) with efficient recycling has been successfully achieved.
REACTION CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Chemical
Qingchuan Chen, Yubin Wang, Kai Wang, Jian Deng, Guangsheng Luo
Summary: This work systematically investigates the scaling-up of microsieve dispersion mixers (MDMs), including sizing-up and numbering-up. The results show that sizing-up improves micromixing performance at low flow rate ratio, while numbering-up is superior in general. Two flow patterns, unrestricted and restricted flows, are observed and distinguished by a dimensionless number. A mathematical model is established to predict the micromixing performance, and a design procedure for scaling up of MDMs is proposed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Lin Sheng, Shaowei Li, Kai Wang, Yu Chang, Jian Deng, Guangsheng Luo
Summary: This study reveals a strong hysteresis phenomenon in the flow state transition between parallel flow and Taylor flow in gas-liquid microfluidics. Three different flow regions are identified, and the hydrodynamics in the bistable region are controlled by kinetic energy and interfacial energy. It emphasizes the importance of following a suitable operating method for gas-liquid microfluidics.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Xinting Liu, Siyuan Zheng, Kai Wang
Summary: Visualized experimental research was conducted to analyze the bubble growth and detachment behaviors on a needle electrode and investigate the voltage-time diagrams of electrochemical reactions in a microchannel reactor. Two types of gas-liquid flow patterns were observed, resulting in different current fluctuations. Quick bubble rupturing was important for maintaining stable electrochemical reactions by preventing ionic conduction blockage. The voltage fluctuation caused by periodic bubble growth and detachment on the electrode exhibited variations in the electrochemical reaction process. The bubble shear-rupture diameter from the electrode was exponential with the capillary number of the electrolyte solution, and the relative diameter of the bubble and electrode was linearly related to the relative voltage fluctuation. The voltage fluctuation was mainly contributed by bubble-induced activation and ohmic overpotentials, with each accounting for approximately 50%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Shenglong Zhang, Kai Wang, Guangsheng Luo
Summary: A parallel scaling-up strategy for the capillary-assembled stepwise microchannel was developed to prepare uniform polystyrene particles with a diameter of ten microns. The strategy generated high-throughput uniform droplets as emulsion templates for the polymerization process. The microchannel droplet generator showed robustness for flow rate deviation and achieved a droplet generation frequency of up to 2.8 x 104 Hz with only four parallel droplet generators.
Article
Engineering, Chemical
Shuyuan Zhang, Haoran Li, Kai Wang, Tong Qiu
Summary: We propose an integrated microfluidic image processing method based on transfer deep learning, which can accelerate the analysis of droplets and bubbles in microfluidic images and accurately determine the critical conditions and size laws of droplets and bubbles based on the recognition results.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Siyuan Zheng, Kai Wang, Guangsheng Luo
Summary: This study proposes an electrolytic approach to synthesize thiuram disulfides based on a microfluidic reactor, achieving high yields and electron utilization efficiency while avoiding waste salt generation and over-oxidation of reaction products.
