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Efficient, continuous oxidation of durene to pyromellitic dianhydride mediated by a V-Ti-P ternary catalyst: The remarkable doping effect

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Chinese Journal of chemical engineering 2023年第3期55卷 156-164页

作者： Da Ke Minjia Wang Jiancheng Ruan Xinzhi Chen Shaodong Zhou College of Chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China Institute of Zhejiang University±Quzhou Quzhou 324000China

Continuous preparation of pyromellitic dianhydride(PMDA) from durene has been studied using a fixedbed reactor. The reaction was performed using a phosphorus-vanadium-titanium ternary *** high selectivity and yield of PMDA was obtained. The in-situ characterization was combined with theoretical calculation to reveal the reaction mechanisms, and the remarkable doping effect was discussed.

关键词： Continuous oxidation Anhydride CAH activation V-Ti-P ternary catalyst

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Acidity Modification of ZSM-5 for Methane Conversion in Co-feeding Method with MTA Reaction

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chemical Research in Chinese Universities 2022年第4期38卷 1012-1017页

作者： YU Yue XI Zhixiang ZHOU Bingjie JIANG Binbo LIAO Zuwei YANG Yao WANG Jingdai HUANG Zhengliang SUN Jingyuan YANG Yongrong Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027P.R.China

Acidity plays a vital role in methane conversion by co-feeding method,which is one of the best strategies to improve the utilization and gentle the reaction conditions of *** this work,Zn,Ni,Mo,La,Ga,Fe and Co-impregnated ZSM-5 zeolites have been prepared with the same substitutions to variate the acidities and tested in co-aromatization of methanol with *** is demonstrated that the new medium-strong acid sites formed by metal and strong acid sites are the key role to activate methane in ***-modified ZSM-5 catalyst is preferred to exhibit the best methane conversion of 12%,whose aromatic selectivity increases from 27.2%to 52.2%compared with that of ***,the addition of methane further improves the production of high-valued aromatics compared with methanol to aromatics(MTA)reaction.

关键词： Methane Methanol to aromatics(MTA) Co-reaction Acid site

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Particle agglomeration and inhibition method in the fluidized pyrolysis reaction of waste resin

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Chinese Journal of chemical engineering 2024年第3期67卷 135-147页

作者： Congjing Ren Peng Zhang Qi Song Zhengliang Huang Yao Yang Yongrong Yang Ningbo Innovation Center Zhejiang UniversityNingbo 315100China College of Chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China

This work investigated the pyrolysis reaction of waste resin in a fluidized bed *** was found that the pyrolysis-generated ash would adhere to the surface of ceramic particles,causing particle agglomeration and *** kaolin could effectively inhibit the particle agglomeration during the fluidized pyrolysis reaction through physical isolation and chemical *** the one hand,kaolin could form a coating layer on the surface of ceramic particles to prevent the adhesion of organic ash generated by the pyrolysis of *** the other hand,when a sufficient amount of kaolin(-0.2%(mass))was added,the activated kaolin could fully contact with the Na+ ions generated by the pyrolysis of resin and react to form a high-melting aluminosilicate mineral(nepheline),which could reduce the formation of low-melting-point sodium sulfate and thereby avoid the agglomeration of ceramic particles.

关键词： Pyrolysis reaction of waste resin Fluidization Particle agglomeration Kaolin

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Dual-emission fluorescent probe with sequential two-step ESIPT activation mechanism for selective hydrazine detection and multifunctional applications

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Journal of Hazardous Materials 2025年 493卷 138388页

作者： Zou, Hanxun Lin, Guoming Bao, Yuxuan Liang, Jie Li, Yunyun Cai, Lifeng Wu, Han-Ying Yang, Fan Chen, Hang Lin, Xiuchun Xiao, Yi-Hong Yang, Lei Huang, Jianhui Hai, Yu Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants Key Laboratory of Ecological Environment and Information Atlas College of Environmental and Biological Engineering Putian University Putian351100 China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials Science Zhejiang Normal University 688 Yingbin Road Jinhua321004 China Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China Department of Physics National University of Singapore Singapore117551 Singapore Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering School of Chemical Engineering and Technology North University of China Taiyuan030051 China

Hydrazine is a commonly used chemical in various industries, including pharmaceuticals, agriculture, and aerospace. However, its high toxicity may cause serious harm to the natural environments and human health. The development of new methods for sensitive and selective detection of hydrazine is of great significance. In this study, we present a fluorescent probe that employs a unique two-step excited-state intramolecular proton transfer (ESIPT) activation mechanism for hydrazine detection. This probe integrates a phthalimide group into benzothiazole scaffold with its fluorescence initially quenched due to the inhibition of ESIPT process and photo-induced electron transfer (OFF state). Upon exposure to hydrazine, the nucleophilic cleavage of the phthalimide group activates the first ESIPT process, yielding yellow emission (ON1 state). A subsequent deprotection step triggers the second ESIPT process, producing blue fluorescence (ON2 state). These three states fluorescent change along with dual-emission signal output provide a highly sensitive and reliable method for hydrazine detection and monitoring, with a limit of detection (LOD) of 18 nM. Moreover, this probe showed versatile applications in environmental monitoring, food sample analysis, plant imaging, and bioimaging, including a convenient smartphone-assisted quantitative assay. The dual-activation mechanism offers valuable insights for the design of novel ESIPT probes, paving the way for promoting their applications in chemical, biological, and environmental fields. © 2025 Elsevier B.V.

关键词： Hydrazine

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Synthesis and characterization of caprolactone based polyurethane with degradable and antifouling performance

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Chinese Journal of chemical engineering 2021年第6期34卷 299-306页

作者： Abid Ali Lina Song Jiankun Hu Jingxian Jiang Qingqing Rao Muhammad Shoaib Shah Fahad Yongjie Cai Xiaoli Zhan Fengqiu Chen Qinghua Zhang College of Chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical EngineeringManufacture TechnologyZhejiang UniversityHangzhou 310027China Ningbo Research Institute Zhejiang UniversityNingbo 315100China

In this work,a degradable polyurethane composed of caprolactone(CL)and L-Lactide(LLA)as soft segments,and 4,40-methylenebis(cyclohexyl isocyanate)(H12 MDI)and polytetramethylene ether glycol(PTMEG)as hard segments,was *** degradation experiment revealed that the degradable polyurethane(PU)could be degraded in artificial *** also showed that caprolactone-copolyurethane(CL-PU)copolymer with higher crystallinity degraded much slower in artificial ***,the introduction of LLA resulted in an increase in the hydrophilicity and reduction in the crystallinity of degradable PU,as demonstrated by the contact angle *** result of the scanning electron microscope showed that the surface of degradable PU renewed under static ***,degradable PU was able to be used as a carrier,and it controlled the release rate of 4,5-dichloro-2-octyl-isothiazolone(DCOIT).The anti-diatom(Navicula incerta)test demonstrated that the(caprolactone-co-L-lactide)-co-polyurethane 4(CL/LAx-PU4)with DCOIT contents prevented the adhesion of diatom Navicula incerta(88.37%reduction)due to their self-polishing and the release of ***,the degradable PU consisted of CL,LLA,and DCOIT could be a durable resin with good antifouling activity for the application in the marine anti-biofouling field.

关键词： Antifoulant 4 5-dicholoro-2-octyl-isothiazolone Degradable polyurethane L-Lactide Caprolactone

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Effect mechanism of diamond content on tribo-chemical processing of sapphire wafers using developed clusters of diamond and ceria chemically agglomerated abrasive cluster

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Ceramics International 2025年

作者： Wang, Zhankui Huang, Shangci Liu, Kuncheng Zhao, Zhicheng Fan, Yihang Chen, Jiapeng Yao, Yunlong Pang, Minghua Ma, Lijie Su, Jianxiu School of Mechanical and Electrical Engineering Henan Institute of Science and Technology Henan Xinxiang453003 China School of Information Engineering Henan University of Science and Technology Henan Luoyang471000 China Research Center for Advanced Micro-/Nano- Fabrication Materials College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai201620 China State Key Laboratory for High Performance Tools Zhengzhou Abrasive Grinding Research Institute Co. Ltd Henan 450001 China State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University Hangzhou310027 China Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology National Key Laboratory of Science and Technology on Helicopter Transmission College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China

To enhance the material removal rate (MRR) and surface quality of sapphire wafers during lapping, this study proposes a new method for preparing chemically agglomerated abrasive clusters (CAAC). Using this method, five distinct CAAC abrasives, each with a different diamond content, were prepared for lapping experiments on sapphire wafers. MRR and surface roughness Ra were used as evaluation indicators to elucidate the removal behavior of CAAC abrasive particles during the lapping of sapphire wafers. The study analyzed changes in the friction curve, the elemental composition of the sapphire surface before and after lapping, and the microscopic morphology of the CAAC abrasives. The results indicate that #4 CAAC demonstrates the highest MRR and favorable surface quality among the tested variants. Specifically, #4 CAAC achieved the highest removal rate of 380.267 nm/min and the lowest surface roughness of 33.978 nm, outperforming #1, #2, #3, and #5 CAAC. Compared to W50 single crystalline diamond (W50 SCD) of equivalent grain size, the MRR increased by a factor of 3.1. Furthermore, within a certain range, the machining performance of CAAC improves with an increase in diamond content;however, both excessively high and low diamond contents negatively impact overall performance. When the diamond content in CAAC reaches 42 %, machinability is optimized. This method enhances the processing efficiency of sapphire wafers, improves surface quality, and offers innovative approaches for efficient and cost-effective sapphire wafer processing. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： chemically agglomerated abrasives cluster Diamond Lapping Sapphire

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Direct Conversion of Methane to Propylene

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Research 2024年第2期2023卷 463-472页

作者： Yunpeng Hou Yuxiang Lan Chao Qian Shaodong Zhou College of Chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang University310027 HangzhouP.R.China Zhejiang Provincial Innovation Center of Advanced Chemicals Technology Institute of Zhejiang University-Quzhou324000 QuzhouP.R.China

Nonoxidative coupling of methane exhibits promising prospect in that it affords value-added hydrocarbons and hydrogen with high atom ***,challenge remains in direct,selective conversion of methane to more valuable hydrocarbons like *** current work presents a catalyst with well-dispersed Ta atoms anchored by graphitic C_(3)N_(4)-supported *** a catalyst is able to convert methane selectively to ethylene and propylene at a relatively low temperature(350℃).The conception of the active center and construction of the catalyst have been described,and the origins of the catalytic performance are discussed.

关键词： methane catalyst hydrocarbons

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Acoustic emission detection of slag performance in coal gasifiers

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Chinese Journal of chemical engineering 2020年第8期28卷 2200-2207页

作者： Zhengliang Huang Peng Zhang Yao Yang Jingyuan Sun JingdaiWang Yongrong Yang Chenghao Huang Zhixiong Huang College of Chemical and Biological Engineering Zhejiang UniversityZhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyHangzhou 310027China State Key Laboratory of Chemical Engineering Hangzhou 310027China Sinopec Group Anqing BranchAnqing 246000China

This work first investigated the detection of slags,slag pool liquid level,and slag accumulation height in laboratory scale based on acoustic emission(AE)detection,and further tried the feasibility of this method in an industrial scale coal *** show that the energy and variance of acoustic signals can realize the accurate detection of large slag(criterion:E>1.5 E0,S>1.2 S0),and the average relative error is only 0.28%.The acoustic energy in the frequency range of 20–40 k Hz is defined as the characteristic energy,which can realize the accurate detection of slag accumulation height and slag pool liquid level,and the average relative error is only 3.94%.Furthermore,AE detection also realize accurate detection of large slag in an industrial scale gasifier and the acoustic signals at slag screen can be used to realize the early warning of the slag collapse(5 h earlier).

关键词： Acoustic emission(AE)detection Slag pool liquid level Slag accumulation height Early warning

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Constructing globally consecutive 3D conductive network using P-doped biochar cotton fiber for superior performance of silicon-based anodes

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Journal of Materials Science & technology 2024年第6期173卷 181-191页

作者： Jun Cao Jianhong Gao Kun Wang Zhuoying Wu Xinxin Zhu Han Li Min Ling Chengdu Liang Jun Chen Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Zheda Road 99Quzhou 324000China

The inferior conductivity and drastic volume expansion of silicon still remain the bottleneck in achieving high energy density Lithium-ion Batteries(LIBs).The design of the three-dimensional structure of electrodes by compositing silicon and carbon materials has been employed to tackle the above challenges,however,the exorbitant costs and the uncertainty of the conductive structure persist,leaving ample room for ***,silicon nanoparticles were innovatively composited with eco-friendly biochar sourced from cotton to fabricate a 3D globally consecutive conductive *** network serves a dual purpose:enhancing overall electrode conductivity and serving as a scaffold to maintain electrode *** conductivity of the network was further augmented by introducing P-doping at the optimum doping temperature of 350℃.Unlike the local conductive sites formed by the mere mixing of silicon and conductive agents,the consecutive network can affirm the improvement of the conductivity at a macro ***,first-principle calculations further validated that the rapid diffusion of Li^(+)is attributed to the tailored electronic microstructure and charge rearrangement of the *** prepared consecutive conductive Si@P-doped carbonized cotton fiber anode outperforms the inconsecutive Si@Graphite anode in both cycling performance(capacity retention of 1777.15 mAh g^(-1) vs.682.56 mAh g^(-1) after 150 cycles at 0.3 C)and rate performance(1244.24 mAh g^(-1) vs.370.28 mAh g^(-1) at 2.0 C).The findings of this study may open up new avenues for the development of globally interconnected conductive networks in Si-based anodes,thereby enabling the fabrication of high-performance LIBs.

关键词： 3D conductive network Biochar carbon-silicon anode Heteroatoms doping strategy DFT calculation Lithium-ion battery

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On the distinct reactivity of two isomers of[IrC_(4)H_(2)]^(+)toward methane and water

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Science China Chemistry 2022年第9期65卷 1720-1724页

作者： Bowei Yuan Zizhuang Liu Xiao-Nan Wu Shaodong Zhou College of Chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China Department of Chemistry Fudan UniversityShanghai 200438China

The gas-phase reactions of[IrC_(4)H_(2)]^(+)with methane and water have been explored by using mass spectrometry combined with quantum chemical ***,under the employed conditions,two isomers of[IrC_(4)H_(2)]^(+)co-exist with different *** of them only activates methane while the other is solely reactive with water to produce ***,upon varying the coordination patterns,the Ir center gains rather distinct capabilities of mediating the bond breaking and making *** reactivity toward methane mainly depends on the orbital orientation,while the π-aromaticity of the reaction complex matters for the conversion of *** experimental and theoretical findings in this work not only imply the promising role the Ir atom can play in the bulk-system methane conversion,but may also be instructive on how to construct a highperformance center for steam reforming of methane.

关键词： aromaticity Ir-complex orbital distribution steam-reforming of methane

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