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Measurement and correlation of solubility of 9-fluorenone in 11 pure organic solvents from T = 283.15 to 323.15 K

Chinese Journal of chemical engineering 2023年第8期60卷 235-241页

作者： Huiqi Wang Jianpo Ren Shihao Zhang Jiayu Dai Yue Niu Ketao Shi Qiuxiang Yin Ling Zhou School of Chemical Engineering and Technology State Key Laboratory of Chemical EngineeringTianjin UniversityTianjin 300072China Sinochem Hebei Xinbao Chemical Technology Co. LtdHandan 056500China The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin Tianjin UniversityTianjin 300072China

In this work, the solubility data of 9-fluorenone in 11 pure solvents(methanol, ethanol, n-propanol, isopropanol, n-butanol, iso-butanol, acetonitrile, ethyl formate, ethyl acetate, dimethyl sulfoxide, n-hexane)were measured by the gravimetric method from 278.15 K to 318.15 K under atmospheric pressure. The results showed that the solubility of 9-fluorenone in all tested solvents increased with the raised temperature. The solubility data were correlated by the modified Apelblat equation, λh model and NRTL(nonradom two fluid) model. The average relative deviation(ARD) correlated by three thermodynamic models in different solvents was all below 5%, which indicated that the three thermodynamic models fit the solubility data well. Furthermore, the mixing thermodynamic properties of 9-fluorenone in pure solvent systems were calculated via NRTL model. The results indicated the dissolution process of 9-fluorenone is spontaneous and entropically favorable. The solubility and the mixing thermodynamic properties provided in this paper would play an important role in industrial manufacture and follow-up operation of 9-fluorenone.

关键词： 9-Fluorenone Solubility Correlation model Thermodynamic properties

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Metal-organic-framework-derived copper-based catalyst for multicomponent C-S coupling reaction

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Chinese Journal of chemical engineering 2024年第6期70卷 1-8页

作者： Lixin Chen Hui Zhang Linxi Hou Xin Ge Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Department of Materials-Oriented Chemical Engineering School of Chemical EngineeringFuzhou UniversityFuzhou 350116China Qingyuan Innovation Laboratory Quanzhou 362801China

Copper-based metal-organic frameworks(Cu-MOFs)are a promising multiphase catalyst for catalyzing C-S coupling reactions by virtue of their diverse structures and ***,the unpleasant odor and instability of the organosulfur,as well as the mass-transfer resistance that exists in multiphase catalysis,have often limited the catalytic application of Cu-MOFs in C-S coupling *** this paper,a Cu-MOFs catalyst modified by cetyltrimethylammonium bromide(CTAB)was designed to enhance mass transfer by increasing the adsorption of organic substrates using the long alkanes of ***,elemental sulfur was used to replace organosulfur to achieve a highly efficient and atom-economical multicomponent C-S coupling reaction.

关键词： Design Copper-based metal-organic frameworks (Cu-MOFs) Adsorption C-S coupling reaction Multiphase reaction

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Elaborate construction of potent antioxidant properties in PBP-Ce(Ш)nanosheets via a one-pot approach for seamless integration of anti-corrosion,wear-resistance,and flame-retardancy

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Journal of Materials Science & technology 2024年第34期201卷 197-209页

作者： Xiaoling He Qihan Weng Ruiqin Guo Li Zhang Xinxin Sheng Delong Xie Department of Polymeric Materials and Engineering School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan ProvinceFaculty of Chemical EngineeringKunming University of Science and TechnologyKunming 650500China Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangdong University of TechnologyGuangzhou 510006China

Contemporary industrial sectors are experiencing a growing imperative for coatings that exhibit a multi-tude of *** this study,PBP-Ce(Ш)nanosheets,characterized by robust structural stability,were synthesized using a one-pot method and incorporated into waterborne epoxy resin(WEP)to formu-late nanocomposite *** findings demonstrate that the coating,containing 0.6 wt.%PBP-Ce(Ш)nanosheets,exhibits superb anti-corrosion,flame-retardant,and wear-resistant *** 42 days of 3.5%NaCl solution immersion,the fb of the 6-PBTC coating was a mere 3.55 Hz,significantly lower than the 309.51 Hz measured for the pure WEP ***,the Peak heat release rate(PHRR)of the microscale combustion calorimeter(MCC)and the wear rate of the 6-PBTC coating were reduced by 41.63%and 84.65%,respectively,in comparison to the pure WEP *** work not only delves into the utilization of BP nanosheets but also presents a viable solution for advancing the development of multifunctional coatings.

关键词： Black phosphorus(BP) Anti-corrosion Wear-resistance Flame-retardancy

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Thermodynamic Study on Aromatization of Methanol

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China Petroleum Processing & Petrochemical technology 2024年第4期26卷 105-115页

作者： Zhang Yanjun Du Haofan Zhang Liangjie Li Jianwei State Key Laboratory of Chemical Resources Engineering Beijing University of Chemical TechnologyBeijing 100029China

The number of independent reactions in the methanol aromatization system using a Zn/ZSM-5 molecular sieve as a catalyst is first determined by the atomic matrix ***,the thermodynamic network structure of the methanol aromatization system is proposed based on the double-cycle mechanism and independent reaction *** analysis is performed to determine the reaction enthalpy change,equilibrium constant,and Gibbs free energy at different temperatures for each *** effects of temperature and pressure on the equilibrium composition are also *** results indicated that the entire system is a process that generates a considerable amount of *** the temperature is not conducive to forming olefins,alkanes,and aromatics,except for methanol *** equilibrium composition of aromatics tends to increase and then decrease with the temperature *** equilibrium molar fraction of aromatics at pressures below 1.5 MPa,except benzene,increases significantly with increasing *** analysis of equilibrium components at varying temperatures and pressures is conducted to narrow the range for selecting the appropriate reaction temperature and pressure.

关键词： methanol aromatization ZSM-5 molecular sieve thermodynamics

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Structural characteristics and viscous behaviors of Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3) slags

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International Journal of Minerals,Metallurgy and Materials 2025年第5期32卷 1068-1078页

作者： Renze Xu Zhen Wang State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 101408China

The high-temperature properties of the Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3) basic slag had significant influences on steelmaking opera-tions and waste slag *** further clarify the structural characteristics and properties of Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3)slags,the struc-tures and viscosities of the slags were *** slag liquidus temperature was determined,which decreased from 1365 to 1287℃ after 4.16wt%-8.52wt%Al_(2)O_(3) was added to the slags and then increased to 1356℃ after 17.07wt%Al_(2)O_(3) was *** analysis indicated that increasing temperature depolymerized the structure of the 4.16wt%Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3) slag by decreasing the amount of complex AlO_(4) units and promoting the formation of simplified silicate *** addition of Al_(2)O_(3) to slags could promote the polymerization of the slag structure by increasing the quantities of complex AlO_(4) tetrahedral and complicated Si-O *** in the degree of structure polymerization showed similar trends at the same superheat degree and the same quenching temperature,and both samples could be used for analyzing the impact of Al_(2)O_(3) on slag ***,the viscous behavior of the present slag system was *** Al_(2)O_(3) content could increase slag viscosity,and the apparent activation energy increased from 132.13 to 174.83 kJ/mol as the content of Al_(2)O_(3)increased from 4.16wt%to 17.07wt%.

关键词： molten slag alumina structure viscosity spectroscopy

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Ten-Minute Synthesis of a New Redox-Active Aqueous Binder for Flame-Retardant Li-S Batteries

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Energy & Environmental Materials 2024年第2期7卷 48-57页

作者： Tianpeng Zhang Borui Li Zihui Song Wanyuan Jiang Siyang Liu Runyue Mao Xigao Jian Fangyuan Hu School of Materials Science and Engineering State Key Laboratory of Fine ChemicalsFrontiers Science Center for Smart Materials Oriented Chemical Engineering Technology Innovation Center of High Performance Resin Materials(Liaoning Province)Key Laboratory of Energy Materials and Devices(Liaoning Province)Dalian University of TechnologyDalian 116024China State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart Materials Oriented Chemical EngineeringSchool of Chemical Engineering Technology Innovation Center of High Performance Resin Materials(Liaoning Province)Key Laboratory of Energy Materials and Devices(Liaoning Province)Dalian University of TechnologyDalian 116024China

As a critical role in battery systems,polymer binders have been shown to efficiently suppress the lithium polysulfide shuttling and accommodate volume changes in recent ***,preparation processes and safety,as the key criterions for Li-S batteries'practical applications,still attract less ***,an aqueous multifunction binder(named PEI-TIC)is prepared via an easy and fast epoxy-amine ring-opening reaction(10 min),which can not only give the sulfur cathode a stable mechanical property,a strong chemical adsorption and catalytic conversion ability,but also a fire safety *** Li-S batteries based on the PEI-TIC binder display a high discharge capacity(1297.8 mAh g^(-1)),superior rate performance(823.0 mAh g^(-1)at 2 C),and an ultralow capacity decay rate of 0.035%over more than 800 *** under 7.1 mg cm^(-2)S-loaded,the PEI-TIC electrode can also achieve a high areal capacity of 7.2 mA h g^(-1)and excellent cycling stability,confirming its application ***,it is also noted that TG-FTIR test is performed for the first time to explore the flame-retardant mechanism of polymer *** work provides an economically and environmentally friendly binder for the practical application and inspires the exploration of the flame-retardant mechanism of all electrode components.

关键词： 3D cross-linked network environmentally friendly flame retardant Li-S batteries multifunction binder

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Rational design of heterogeneous catalysts by breaking and rebuilding scaling relations

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Chinese Journal of chemical engineering 2022年第1期35卷 22-28页

作者： Wei-Qi Yan Yi-An Zhu Xing-Gui Zhou Wei-Kang Yuan State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

Various scaling relations have long been established in the field of heterogeneous catalysis,but the resultant volcano curves inherently limit the catalytic performance of catalyst *** the other hand,it is still very challenging to develop universal descriptors that can be used in various types of catalysts and reaction *** these reasons,several strategies have recently been proposed to break and rebuild scaling relations to go beyond the top of *** this review,some previously proposed descriptors have been briefly ***,the strategies for breaking known and establishing new and more generalized scaling relations in complex catalytic systems have been ***,the application of machine-learning techniques in identifying universal descriptors for future computational design and high-throughput screening of heterogeneous catalysts has been discussed.

关键词： Density functional theory(DFT) Heterogeneous catalysis Microkinetic analysis Scaling relations

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Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways

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National Science Review 2024年第2期11卷 168-176页

作者： Xiaowei Du Peng Zhang Gong Zhang Hui Gao Lili Zhang Mengmeng Zhang Tuo Wang Jinlong Gong School of Chemical Engineering and Technology Key Laboratory for Green Chemical Technology of the Ministry of Education Tianjin University Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) National Industry-Education Platform of Energy Storage Tianjin University Joint School of the National University of Singapore and Tianjin University International Campus of Tianjin University Haihe Laboratory of Sustainable Chemical Transformations

Gas diffusion electrodes（GDEs） mediate the transport of reactants, products and electrons for the electrocatalytic CO2reduction reaction（CO2RR） in membrane electrode assemblies. The random distribution of ionomer, added by the traditional physical mixing method, in the catalyst layer of GDEs affects the transport of ions and CO2. Such a phenomenon results in elevated cell voltage and decaying selectivity at high current densities. This paper describes a pre-confinement method to construct GDEs with homogeneously distributed ionomer, which enhances mass transfer locally at the active centers. The optimized GDE exhibited comparatively low cell voltages and high CO Faradaic efficiencies（FE > 90%） at a wide range of current densities. It can also operate stably for over 220 h with the cell voltage staying almost unchanged. This good performance can be preserved even with diluted CO2feeds, which is essential for pursuing a high single-pass conversion rate. This study provides a new approach to building efficient mass transfer pathways for ions and reactants in GDEs to promote the electrocatalytic CO2RR for practical applications.

关键词： CO2 electroreduction gas diffusion electrode mass transfer ionomer Ag catalyst

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Modeling of propane dehydrogenation combined with chemical looping combustion of hydrogen in a fixed bed reactor

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Chinese Journal of chemical engineering 2022年第7期35卷 165-173页

作者： Junru Liu Rui Hu Xinlei Liu Qunfeng Zhang Guanghua Ye Zhijun Sui Xinggui Zhou State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

A redox process combining propane dehydrogenation(PDH)with selective hydrogen combustion(SHC)is proposed,modeled,simulated,and *** this process,PDH and SHC catalysts are physically mixed in a fixed-bed reactor,so that the two reactions proceed *** redox process can be up to 177.0%higher in propylene yield than the conventional process where only PDH catalysts are packed in the *** reason is twofold:firstly,SHC reaction consumes hydrogen and then shifts PDH reaction equilibrium towards propylene;secondly,SHC reaction provides much heat to drive the highly endothermic PDH *** propylene yield,operating time,and other factors,the preferable operating conditions for the redox process are a feed temperature of 973 K,a feed pressure of 0.1 MPa,and a mole ratio of H_(2) to C_(3)H_(8) of 0.15,and the optimal mass fraction of PDH catalyst is *** work should provide some useful guidance for the development of redox processes for propane dehydrogenation.

关键词： Propane dehydrogenation Selective hydrogen combustion Simulation Optimization Redox process

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Tuning Li/Ni mixing by reactive coating to boost the stability of cobalt-free Ni-rich cathode

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Journal of Energy Chemistry 2024年第10期97卷 20-29,I0002页

作者： Fanghui Du Xitong Zhang Yingchao Wang Lei Ding Pengfang Zhang Lingyang Liu Dong Wang Jianzong Man Yuling Chen Yunwu Li Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology and School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000ShandongChina School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina

Cobalt-free cathode materials are attractive for their high capacity and low cost,yet they still encounter issues with structural and surface ***_(4),in particular,has garnered attention as an effective stabilizer for bulk and ***,the impact of interfacial reactions and elemental interdiffusion between AlPO_(4) and LiNi_(0.95)Mn_(0.05)O_(2) upon sintering on the bulk and surface remains *** this study,we demonstrate that during the heat treatment process,AlPO_(4) decomposes,resulting in Al doping into the bulk of the cathode through elemental ***,PO_(4)^(3-)reacts with the surface Li of material to form a Li_3PO_(4) coating,inducing lithium deficiency,thereby increasing Li/Ni *** suitable Li/Ni mixing,previously overlooked in AlPO_(4) modification,plays a pivotal role in stabilizing the bulk and surface,exceeding the synergy of Al doping and Li_3PO_(4) *** presence of Ni^(2+)ions in the lithium layers contributes to the stabilization of the delithiated structure via a structural pillar ***,suitable Li/Ni mixing can stabilize the lattice oxygen and electrode-electrolyte interface by increasing oxygen removal energy and reducing the overlap between the Ni^(3+/4+)e_g and O^(2-)2p *** findings offer new perspectives for the design of stable cobalt-free cathode materials.

关键词： Cobalt-free Ni-rich cathode Li/Ni mixing Al doping Li_(3)PO_(4) coating Lithium-ion batteries

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