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Microwave synthesis of vanadium phosphorus oxide catalysts for n-butane selective oxidation

Particuology 2025年第1期96卷 97-105页

作者： Zhiqi Xie Shengwen Zhu Xingsheng Wang Shuang Wei Ruirui Zhang Ruixia Liu Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringInnovation Academy for Green ManufactureCASBeijing100190China University of Chinese Academy of Sciences Beijing100049China

Vanadium phosphorus oxide (VPO) catalysts play a crucial role in the selective oxidation of n-butane to maleic anhydride (MA), and their catalytic performance is highly dependent on the synthesis conditions of the precursor. This study focuses on a facile and rapid microwave irradiation method for the synthesis of VPO precursors. The effects of microwave exposure time and power on morphology, crystalline structure, and catalytic effect of VPO are investigated. The relationship between the structure and performance of the catalysts is explored by SEM, TEM, BET, FT-IR, XRD, Raman, and XPS characterization. The results demonstrate that microwave power is the key factor influencing the size, thickness, surface area, and active surfaces of vanadium pyrophosphate after activation. Additionally, the P/V ratio and Lat-O/Sur-O ratio on the catalyst surface vary with different synthesis conditions, which significantly affect the catalytic performance. In conclusion, the microwave-synthesized VPO catalyst exhibits remarkable enhancements in n-butane conversion (87.2%) and maleic anhydride (MA) selectivity (70.2%), which shows high efficiency and energy-saving, providing a new research direction for the future preparation of VPO catalysts.

关键词： Microwave synthesis VPO catalyst n-butane oxidation Maleic anhydride yield

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Effects of internals on macroscopic fluid dynamics in a bubble column

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Chinese Journal of Chemical engineering 2025年第1期77卷 19-29页

作者： Shijie Liu Jin Liang Qin Li Hui Yu Haoliang Wang Xiangyang Li Chao Yang School of Chemical Engineering Sichuan UniversityChengdu 610065China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Petroleum Molecular&Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

The effects of internals on liquid mixing and gas-liquid mass transfer have rarely been investigated in bubble columns,and the commonly used measurement method overestimates significantly overall gas ***,gas holdup measurement method is improved by conducting multi-point liquid level measurement and using net fluid volume instead of bed volume to calculate gas ***,a stable conductivity method for liquid macromixing has been established by shielding large bubbles using#16nylon ***,the influences of internal coverage(=12.6%,18.9% and 25.1%) on macroscopic fluid dynamics in a bubble column with a free wall area are systematically *** is found that the presence of internals has a notable effect on macroscopic fluid *** overall gas holdup and gas-liquid volumetric mass transfer coefficient decrease,and the macromixing time decreases with the increase of internal cross-sectional area *** are mainly caused by the uneven distribution of airflow due to the low resistance in the free wall *** design makes maintenance easier,but in reality,the reactor performance has *** improvements will be made to the reactor performance based on such a configuration through flow guidance using baffles.

关键词： Bubble column Internals Macroscopic fluid dynamics Mixing Mass transfer

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Density functional theory studies of Pt-based catalysts for CO oxidation

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Science China(Technological Sciences) 2025年第3期68卷 54-71页

作者： Xue LI Yang ZOU Yongqi ZHAO Xiaolong LIU Tingyu ZHU CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China Key Laboratory of Green and High-value Utilization of Salt Lake Resources Chinese Academy of SciencesXining810008China

CO is highly toxic and seriously harmful to human health,so it is meaningful to control CO emissions,especially from industrial *** oxidation is regarded to be an effective method for CO removal,in which Pt-based catalysts show excellent *** of catalytic CO oxidation employing Pt-based catalysts often encounter challenges such as CO poisoning,challenges in activating O_(2),significant temperature sensitivity,and inadequate tolerance to water and sulfur *** experimental hurdles have been corroborated by density functional theory(DFT)computations,which model adsorption,reaction pathways,and electronic structures at catalyst *** analysis has elucidated the underlying mechanisms behind these limitations,laying the foundation for enhancing the efficacy of Pt-based catalysts within the scope of academic *** has been used intensively in recent years to study the reaction mechanism and functioning characteristics of Pt-based catalysts in CO ***,advancements in research on DFT experiments on Pt-based catalysts are *** review provides a comprehensive overview and insights into the mechanism of CO adsorption on the surface of single-atom and multi-atom Pt-based catalysts,its effect on CO oxidation performance,and reaction pathways of CO oxidation in the hope of providing theoretical guidance for the structural design of most effective catalysts.

关键词： platinum catalytic oxidation carbon monoxide density functional theory

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Numerical simulation of vortex breakdown in a cylindrical tank with rotating bottom and free surface using level set method

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Chinese Journal of Chemical engineering 2025年第1期77卷 293-300页

作者： Zepeng Zhao Qin Li Feng Ye Haoliang Wang Jianfeng Wang Hui Yu Xiangyang Li Chao Yang School of Chemical Engineering Sichuan UniversityChengdu 610065China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Petroleum Molecular&Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China

A cylindrical chamber with a rotating bottom holds significant potential for application in cell culture bioreactors due to its ability to generate more stable swirling *** order to control vortex breakdown within the chamber,this study first establishes a computational fluid dynamics simulation coupled with the level set *** by experimental results in literature,this method accurately simulates the position and shape of vortex breakdown,and also predicts the critical Reynolds numbers for the appearance and detachment of vortex breakdown bubbles from the ***,it precisely captures the gaseliquid interface and depicts the vortex breakdown phenomenon in the air above the liquid for the first ***,it predicts the impact of physical property of gaseliquid systems on vortex breakdown in response to significant changes in viscosity of microbial process systems.

关键词： Vortex breakdown Level set Microbial cultivation Micro-bioreactor

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Construction of Ni single-atom coordinated with doped N and S elements for mild hydrogenation of methyl acrylate to methyl propionate

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Nano Research 2025年第1期18卷 217-224页

作者： Taolue Sun Chen Jian Gang Wang Hui Zhao Guoliang Zhang Zengxi Li Chunshan Li State Key Laboratory of Mesoscience and Engineering CAS Key Laboratory of Green Process and EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Huizhou Institute of Green Energy and Advanced Materials Huizhou 516081China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516081China

Although the nickel-based catalyst is able toexhibit comparative catalytic activity to noble metal formethyl acrylate hydrogenation,it requires strict reactioncondition,which can be improved by regulation ofcoordination *** this study,we constructed akind of Ni single-atom coordinated with N and S(Ni-NSC)through the pyrolysis of organic Ni-based precursors at600℃.The existence and fine structure of Ni single-atom were confirmed by the spherical electron microscopicobservation in combination with the X-ray absorption spectroscopy(XAS)*** addition,the catalytichydrogenation assessment suggested that the as-prepared Ni-NSC catalyst exhibited higher activity and stability than theNi/NSC supported catalyst prepared by incipient wetness impregnation *** remarkable catalytic activity was dueto the high dispersion and density of Ni single-atom and weak adsorption energy of intermediates on these Ni sites.

关键词： methyl acrylate mild hydrogenation Ni single-atom coordination environment adsorption energy

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Absorption mechanism of SO_(3)on various alkaline absorbents in the presence of SO_(2)

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Journal of Environmental Sciences 2025年第3期149卷 268-277页

作者： Junxiang Guo Jin Xiong Yuran Li Jirigele Qinggele Tingyu Zhu Shougang Group Research Institute of Technology Beijing 100043China Beijing Key Laboratory of Green Recyclable Process for Iron&Steel Production Technology Beijing 100043China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China WISDRI City Environment Protection Engineering Limited Company Wuhan 430205China

Sulfur trioxide(SO_(3))as a condensable particle matter has a significant influence on atmospheric visibility,which easily arouses formation of *** is imperative to control the SO_(3)emission from the industrial flue *** commonly used basic absorbents,including Ca(OH)_(2),MgO and NaHCO_(3)were selected to explore the effects of temperature,SO_(2)concentration on the SO_(3)absorption,and the reaction mechanism of SO_(3)absorption was further *** suitable reaction temperature for various absorbents were proposed,Ca(OH)_(2)at the high temperatures above 500°C,MgO at the low temperatures below 320°C,and NaHCO_(3)at the temperature range of 320–500°*** competitive absorption between SO_(2)and SO_(3)was found that the addition of SO_(2)reduced the SO_(3)absorption on Ca(OH)_(2)and NaHCO_(3),while had no effect on *** order of the absorption selectivity of SO_(3)follows MgO,NaHCO_(3)and Ca(OH)_(2)under the given conditions in this *** absorption process of SO_(3)on NaHCO_(3)follows the shrinking core model,thus the absorption reaction continues until NaHCO_(3)was exhausted with the utilization rate of nearly 100%.The absorption process of SO_(3)on Ca(OH)_(2)and MgO follows the grain model,and the dense product layer hinders the further absorption reaction,resulting in low utilization of about 50%for Ca(OH)_(2)and *** research provides a favorable support for the selection of alkaline absorbent for SO_(3)removal in application.

关键词： Alkali absorbent Sulfur trioxide Selectivity Shrinking core model Grain model

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Adsorption removal of mercury from flue gas by metal selenide:A review

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Journal of Environmental Sciences 2025年第2期148卷 420-436页

作者： Yang Zheng Guoliang Li Yi Xing Wenqing Xu Tao Yue School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China

Mercury(Hg)pollution has been a global concern in recent decades,posing a significant threat to entire ecosystems and human health due to its cumulative toxicity,persistence,and transport in the *** intense interaction between mercury and selenium has opened up a new field for studying mercury removal from industrial flue gas *** the advantages of good Hg^(0) capture performance and lowsecondary pollution of the mineral selenium compounds,the most noteworthy is the relatively low regeneration temperature,allowing adsorbent regeneration with low energy consumption,thus reducing the utilization cost and enabling recovery of mercury *** paper reviews the recent progress of mineral selenium compounds in flue gas mercury removal,introduces in detail the different types ofmineral selenium compounds studied in the field ofmercury removal,reviews the adsorption performance of various mineral selenium compounds adsorbents on mercury and the influence of flue gas components,such as reaction temperature,air velocity,and other factors,and summarizes the adsorption mechanism of different fugitive forms of selenium *** on the current research progress,future studies should focus on the economic performance and the performance of different carriers and sizes of adsorbents for the removal of Hg^(0) and the correlation between the gas-particle flow characteristics and gas phase mass transfer with the performance of Hg^(0) removal in practical industrial *** addition,it remains a challenge to distinguish the oxidation and adsorption of Hg^(0) quantitatively.

关键词： Non-conventional pollutants Adsorbents Metal selenides Flue gas Mercury removal

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Synergistic solvent extraction system of bis(pyridin-2-ylmethyl)dodecan-1-amine and dinonylnaphthalene for enhanced selective extraction of nickel and cobalt

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Chinese Journal of Chemical engineering 2025年第1期77卷 10-18页

作者： Bharat Prasad Sharma Tianzhang Wang Yufeng Liang Jinping Xiong Liangrong Yang Zheng Li Beijing Key Laboratory of Electrochemical Process and Technology of Materials Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 101408China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Key Laboratory of Green and High-end Utilization of Salt Lake Resources Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Simultaneous recovery of Ni and Co from Fe(Ⅲ)and AI is a critical challenge in hydrometallurgical *** solvent extraction systems often struggle with selectivity and effective performance in mixed metal ion ***,a new synergistic solvent extraction(SSX)system comprised of a novel pyridine analog,N,N-bis(pyridin-2-ylmethyl)dodecan-1-amine(BPMDA),and dinonylnaphthalene sulfonic acid(DNNSA)with tributyl phosphate as phase modifier is *** SSX system demonstrates high extraction performance achieving>90%for Ni and>97%for Co in a singlestage extraction process,with high *** optimal conditions,the selectivity sequence is observed as Co^(2+)(>97%)>Ni^(2+)(>90%)>Mn^(2+)(<20%)>Fe^(3+)(<10%)>Mg^(2+)(<5%)>Al^(3+)(<2%)>Ca^(2+)(<1%).Spectroscopic analysis evidences the preferential binding of BPMDA with Ni and Co in the presence of DNNSA,concurrently achieving a significant reduction in the co-extraction of Fe(Ⅲ)and *** selective complexation of Ni and Co using the SSX system offers a highly efficient and selective approach for their extraction,with promising potential for applications in recovery-based processes.

关键词： Nickel and cobalt extraction Synergistic solvent extraction DNNSA Pyridine Hydrometallurgy

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Unveiling the CO2 electrocatalytic mechanism in ionic liquids via real-time AFM and voltammetry

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Chemical Communications 2025年第41期61卷 7498-7501页

作者： Li, Kaixuan Liu, Shuai Wang, Ting Mao, Bingwei Yan, Jiawei State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Mesoscience and Engineering CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

In situ AFM has revealed CO2-induced morphological changes of ionic liquid (IL) nanomembranes, which correlate with the interaction with CO2. Voltammetry measurements on GC and Au electrodes suggest that in the ILs BMIPF6, BMIDCA and BMINO3, which have the same cation but different anions, the electrode material plays a dominant role in the electrochemical CO2 reduction, while the ILs exhibit a synergistic effect on CO2RR. The magnitude of the reaction current is primarily related to the viscosity of the ILs. © 2025 The Royal Society of Chemistry.

关键词： Liquid membrane electrodes

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Sulfuric acid etching CeO2 nanoparticles to promote high KA-Oil selectivity in cyclohexane selective oxidation

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Chinese Journal of Chemical engineering 2025年 81卷 151-160页

作者： Wei, Shuang Li, Yingwei Wang, Longlong Li, Kexin He, Bin Zhang, Ruirui Liu, Ruixia Henan Institute of Advanced Technology Zhengzhou University Zhengzhou450001 China Sino-Danish College University of Chinese Academy of Sciences Beijing100049 China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Innovation Academy for Green Manufacture CAS Beijing100190 China Sino-Danish Centre for Education and Research CAS Beijing100190 China

Nanostructured ceria has attracted much attention in the field of redox catalysts due to the numerous active sites with excellent redox ability. Based on the acidic medium etching strategy, we constructed the strong binding centers (hydroxyl sites and strong acid sites) on the surfaces of nanostructured ceria, which regulate the adsorption process of KA-Oil (the mixture of cyclohexanol and cyclohexanone) and to promote high KA-Oil selectivity in cyclohexane oxidation. The three CeO2 (nanocube, nanorod and nanopolyhedron) with different exposed crystal planes were treated by acid etching to change the surface sites and catalytic properties. The transition behavior of surface sites during etching was revealed, abundant strong binding centers were proved to be constructed successfully. And especially for the nanorod treated by acid (Acid@CeO2-NR) with the strongest response for sulfuric acid etching, the strong adsorption of cyclohexanone by strong binding centers was confirmed based on the in-situ DRIFTs. The sulfuric acid etching strategy to enhance the selective oxidation of cyclohexane based on the construction of strong binding centers was proved to be feasible and effective, Acid@CeO2-NR with strongest etching response achieved the dramatic promotion of KA-Oil selectivity from 64.1% to 92.3%. © 2025 The Chemical Industry and engineering Society of China, and Chemical Industry Press Co., Ltd.

关键词： Chemical industry

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