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中国化学工程学报（英文版）
中国化学工程学报（英文版）

廖叶华

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1004-9541

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010-64980783

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中国化学工程学报（英文版）/Journal Chinese Journal of Chemical EngineeringCSCDCSTPCD北大核心EISCI
查看更多>>The Chinese Journal of Chemical Engineering (Bimonthly, started in 1982) is the official journal of the Chemical Industry and Engineering Society of China and published by the Chemical Industry Press. The aim of the journal is to develop the international exchange of scientific and technical information in the field of chemical engineering. It publishes original research papers that cover the major advancements and achievements in chemical engineering in China as well as some articles from overseas contributors. The topics of journal include chemical engineering, chemical technology, biochemical engineering, energy and environmental engineering and other relevant fields. Papers are published on the basis of their relevance to theoretical research, practical application or potential uses in the industry as Research Papers, Research Notes, Chemical Engineering Data and Reviews. Prominent domestic and overseas chemical experts and scholars have been invited to form an International Advisory Board and the Editorial Committee. It enjoys recognition among Chinese academia and industry as a reliable source of information of what is going on in chemical engineering research, both domestic and abroad.
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    Study on the evolution of solid-liquid-gas in multi-scale pore methane in tectonic coal

    Junjie CaiXijian LiHao SuiHonggao Xie...
    122-131页
    查看更多>>摘要：The rich accumulation of methane (CH4) in tectonic coal layers poses a significant obstacle to the safe and efficient extraction of coal seams and coalbed methane. Tectonic coal samples from three geologically complex regions were selected,and the main results obtained by using a variety of research tools,such as physical tests,theoretical analyses,and numerical simulations,are as follows:22.4-62.5 nm is the joint segment of pore volume,and 26.7-100.7 nm is the joint segment of pore specific surface area. In the dynamic gas production process of tectonic coal pore structure,the adsorption method of methane molecules is"solid-liquid adsorption is the mainstay,and solid-gas adsorption coexists". Methane stored in micropores with a pore size smaller than the jointed range is defined as solid-state pores. Pores within the jointed range,which transition from micropore filling to surface adsorption,are defined as gaseous pores. Pores outside the jointed range,where solid-liquid adsorption occurs,are defined as liquid pores. The evolution of pore structure affects the methane adsorption mode,which provides basic theoretical guidance for the development of coal seam resources.
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    Study on trifluoromethanesulfonic acid-promoted synthesis of daidzein:Process optimization and reaction mechanism

    Hai CaoHaibin YangYanxiong FangYuandi Zeng...
    132-139页
    查看更多>>摘要：Daidzein has been widely used in pharmaceuticals,nutraceuticals,cosmetics,feed additives,etc. Its preparation process and related reaction mechanism need to be further investigated. A cost-effective process for synthesizing daidzein was developed in this work. In this article,a two-step synthesis of daidzein (Friedel-Crafts acylation and[5+1]cyclization) was developed via the employment of tri-fluoromethanesulfonic acid (TfOH) as an effective promoting reagent. The effect of reaction conditions such as solvent,the amount of TfOH,reaction temperature,and reactant ratio on the conversion rate and the yield of the reaction,respectively,was systematically investigated,and daidzein was obtained in 74.0％ isolated yield under optimal conditions. Due to the facilitating effect of TfOH,the Friedel-Crafts acylation was completed within 10 min at 90 ℃ and the[5+1]cyclization was completed within 180 min at 25 ℃. In addition,a possible reaction mechanism for this process was proposed. The results of the study may provide useful guidance for industrial production of daidzein on a large scale.
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    Four-channel catalytic micro-reactor based on alumina hollow fiber membrane for efficient catalytic oxidation of CO

    Baichuan XuBin WangTao Li
    140-147页
    查看更多>>摘要：The traditional automotive catalytic converter using commercial ceramic honeycomb carriers has many problems such as high back pressure,low engine efficiency,and high usage of precious metals. This study proposes a four-channel catalytic micro-reactor based on alumina hollow fiber membrane,which uses phase inversion method for structural molding and regulation. Due to the advantages of its carrier,it can achieve lower ignition temperature under low noble metal loading. With Pd/CeO2 at a loading rate of 2.3％(mass),the result showed that the reaction ignition temperature is even less than 160 ℃,which is more than 90 ℃ lower than the data of commercial ceramic substrates under similar catalyst loading and airspeed conditions. The technology in turn significantly reduces the energy consumption of the reaction. And stability tests were conducted under constant conditions for 1000 h,which proved that this catalytic converter has high catalytic efficiency and stability,providing prospects for the design of innovative catalytic converters in the future.
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    Multiple factors influencing high-purity indium electrolytic refining

    Hong-Qiang FanFei LiHong-Xing ZhengWu-ji Pan...
    148-160页
    查看更多>>摘要：The effects of various contaminants in the electrolytic refinement of indium were investigated using a glow discharge mass spectrometer (GDMS). The effects of several factors such as the indium ion (In3+) concentration,the sodium chloride (NaCl) concentration,the current density,the gelatin concentration,the pH,and the electrode distance,were examined. Significant variations in impurity levels concerning gelatin concentration were observed. Both the gelatin and In3+concentration were moderately positively correlated with the Pb content. The Sb concentration was associated positively with the NaCl concen-tration,while the Ti concentration had an adverse correlation with the NaCl concentration. The Bi element content was positively linked to the electrode distance. As the current density increased,Cu,Pb,and Bi impurities initially rose and then eventually declined. Notably,a critical current density of 45 A·m-2 was identified in this behavior.
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    One-step preparation of efficient cuprous chloride catalyst for direct synthesis of trimethoxysilane

    Jiaxin ZhangLu WangZhiqiang MaChuanjun Di...
    161-171页
    查看更多>>摘要：CuCl-based catalysts are the most commonly used catalysts for the"direct synthesis"of trimethoxysilane (M3). CuCl species are sensitive to air and water,and are prone to oxidation deactivation. When CuCl is directly used as a catalyst,it needs to be purified before the utilization,and the operating conditions for the catalyst preparation are relatively harsh,requiring the inert gas environment. Considering a high-temperature activation step required for CuCl-based catalysts used for catalyzing synthesis of M3 to form active phase Cu-Si alloys (CuxSi) with Si powder,in this work,a series of catalysts for the"direct synthesis"of M3 were obtained by a one-step high-temperature activation of the mixture of stable CuCl2 precursors,activated carbon-reducing agent,and Si powder,simultaneously achieving the reduction of CuCl2 to CuCl and the formation of active phase CuxSi alloys of CuCl with Si powder. The prepared samples were characterized through various characterization techniques,and investigated for the cat-alytic performance for the"direct synthesis"of M3. Moreover,the operation conditions were optimized,including the activation temperature,catalyst dosage,Si powder particle size,and reaction temperature. The characterization results indicate that during the one-step activation process,the CuCl2 precursor is reduced to CuCl,and the resulting CuCl simultaneously reacts with Si powder to form active phases Cu3Si and Cu15Si4 alloys. The optimal catalyst Sacm(250,0.8:10) exhibits a good catalytic activity with selectivity of 95％ and yield of 77％ for M3,and shows a good universality for various alcohol substrates. Further-more,the catalytic mechanism of the prepared catalyst for the"direct synthesis"of M3 was discussed.
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    Promoted catalytic property of Cu/SSZ-13 by introducing a minority of Mn for NO removal from diesel engine exhaust

    Runnong YangWuyuan LiuZhaoying WangMing Sun...
    172-182页
    查看更多>>摘要：The Cu-exchanged SSZ-13 with the small-pore chabazite framework is considered as a highly efficient catalyst for selective catalytic reduction of NO with NH3 (NH3-SCR). In order to further improve the catalytic property,a series of Mn ion-assisted Cu/SSZ-13 powder catalysts were prepared by co-exchange method and stepwise exchange method. It is found that the NH3-SCR activity,N2 selectivity,hydro-thermal stability and sulfur resistance of Cu/SSZ-13 are promoted by introducing a minority of Mn (0.15％ to 0.23％ (mass)) through co-exchange method. Characterization results reveal that the Cu,Mn co-exchange enables the higher amounts of Cu2+active sites,the abundant medium strong and strong acid,the optimized ratio of Lewis acid to Brønsted acid etc.,which are required for a good NH3-SCR catalytic property over broad temperature range and under harsh working environment. Moreover,a monolithic catalyst was prepared by impregnating a cordierite ceramic support into the coating slurry containing the optimized CuMn/SSZ-13 powder. The diesel engine bench tests show that Cu,Mn co-exchange gives the monolith catalyst a better catalytic property than commercial catalysts. This work provides an important guidance for the rational design of secondary-ion-assisted zeolites applied in NH3-SCR.
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    A deep reinforcement learning approach to gasoline blending real-time optimization under uncertainty

    Zhiwei ZhuMinglei YangWangli HeRenchu He...
    183-192页
    查看更多>>摘要：The gasoline inline blending process has widely used real-time optimization techniques to achieve optimization objectives,such as minimizing the cost of production. However,the effectiveness of real-time optimization in gasoline blending relies on accurate blending models and is challenged by sto-chastic disturbances. Thus,we propose a real-time optimization algorithm based on the soft actor-critic (SAC) deep reinforcement learning strategy to optimize gasoline blending without relying on a single blending model and to be robust against disturbances. Our approach constructs the environment using nonlinear blending models and feedstocks with disturbances. The algorithm incorporates the Lagrange multiplier and path constraints in reward design to manage sparse product constraints. Carefully abstracted states facilitate algorithm convergence,and the normalized action vector in each optimization period allows the agent to generalize to some extent across different target production scenarios. Through these well-designed components,the algorithm based on the SAC outperforms real-time optimization methods based on either nonlinear or linear programming. It even demonstrates compa-rable performance with the time-horizon based real-time optimization method,which requires knowledge of uncertainty models,confirming its capability to handle uncertainty without accurate models. Our simulation illustrates a promising approach to free real-time optimization of the gasoline blending process from uncertainty models that are difficult to acquire in practice.
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    Three-dimensional porous bimetallic metal-organic framework/gelatin aerogels:A readily recyclable peroxymonosulfate activator for efficient and continuous organic dye removal

    Wenlong XiangXian ZhangRou XiaoYanhui Zhang...
    193-202页
    查看更多>>摘要：As promising catalysts for the degradation of organic pollutants,metal-organic frameworks (MOFs) often face limitations due to the particle agglomeration and challenging recovery in liquid-catalysis application,stemming from their powdery nature. Engineering macroscopic structures from pulverous MOF is thus of great importance for broadening their practical applications. In this study,three-dimensional porous MOF aerogel catalysts were successfully fabricated for degrading organic dyes by activating peroxymonosulfate (PMS). MOF/gelatin aerogel (MOF/GA) catalysts were prepared by directly integrating bimetallic FeCo-BDC with gelatin solutions,followed by freeze-drying and low-temperature calcination. The FeCo-BDC-0.15/GA/PMS system exhibited remarkable performance in degrading various organic dyes,eliminating 99.2％ of rhodamine B within a mere 5 min. Compared to the GA/PMS system,there was over a 300-fold increase in the reaction rate constant. Remarkably,high removal efficiency was maintained across varying conditions,including different solution pH,co-existing inorganic anions,and natural water matrices. Radical trapping experiments and electron paramagnetic resonance analysis revealed that the degradation involved radical (SO4-·) and non-radical routes (1O2),of which 1O2 was dominant. Furthermore,even after a continuous 400-min reaction in a fixed-bed reactor at a liquid hourly space velocity of 27 h-1,the FeCo-BDC/GA composite sustained a degradation efficiency exceeding 98.7％. This work presents highly active MOF-gelatin aerogels for dye degradation and expands the po-tential for their large-scale,continuous treatment application in organic dye wastewater management.
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    Research progress on catalysts for organic sulfur hydrolysis:Review of activity and stability

    Bingning WangXianzhe WangSong YangChao Yang...
    203-216页
    查看更多>>摘要：The removal of organic sulfur through catalytic hydrolysis is a significant area of research in the field of desulfurization. This review provides an overview of recent advancements in catalytic hydrolysis tech-nology of organic sulfur,including the activity,stability,and atmosphere effects of hydrolysis catalysts. The emphasis is on strategies for enhancing hydrolysis activity and anti-oxygen poisoning property of catalysts. Surface modification,metal doping and nitrogen doping have been found to improve the ac-tivity of catalysts. Alkaline components modification is the most commonly used method,the formation of oxygen vacancies through metal doping and creation of nitrogen basic sites through nitrogen doping also contribute to the hydrolysis of organic sulfur. The strategies for anti-oxygen poisoning are discussed in a systematic manner. The structural regulation of catalysts is beneficial for the desorption and diffusion of hydrogen sulfide (H2S),thereby effectively inhibiting its oxidation. Nitrogen doping and the addition of electronic promoters such as transition metals can protect active sites and decrease the number of active oxygen species. These methods have been proven to enhance the anti-poisoning performance of catalysts. Additionally,this article summarizes how different atmospheres affect the activity of hydrolysis catalysts. The objective of this review is to pave the way for the development of efficient,stable and widely used catalysts for organic sulfur hydrolysis.
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    Synergistically constructed lamination-like network of redox-active polyimide and MXene via π-π interactions for aqueous NH4+storage

    Jing HeHongye XuanJing JinKe Yu...
    217-224页
    查看更多>>摘要：As a nonmetallic charge carrier,ammonium ion (NH4+) has garnered significant attention in the con-struction of aqueous batteries due to its advantages of low molar mass,small hydration size and rapid diffusion in aqueous solutions. Polymers are a kind of potential electro-active materials for aqueous NH4+storage. However,traditional polymer electrodes are typically created by covering the bulky collectors with excessive additives,which could lead to low volume capacity and unsatisfactory stability. Herein,a nanoparticle-like polyimide (PI) was synthesized and then combined with MXene nanosheets to syn-ergistically construct an additive-free and self-standing PI@MXene composite electrode. Significantly,the redox-active PI nanoparticles are enclosed between conductive MXene flakes to create a 3D lamination-like network that promotes electron transmission,while the π-π interactions existing between PI and MXene contribute to the enhanced structural integrity and stability within the composite electrode. As such,it delivers superior aqueous NH4+storage behaviors in terms of a notable specific capacity of 110.7 mA·h·cm-3 and a long lifespan with only 0.0064％ drop each cycle. Furthermore,in-situ Raman and UV-Vis examinations provide evidence of reversible and stable redox mechanism of the PI@MXene composite electrode during NH4+uptake/removal,highlighting its significance in the area of electro-chemical energy storage.
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