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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

双月刊

1004-9541

64980783@126.com

010-64980783

100011

北京东城区青年湖南街13号

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

    Lixin ChenHui ZhangLinxi HouXin Ge...
    1-8页
    查看更多>>摘要：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 functions. However, 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 reactions. In 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 CTAB. Concurrently, elemental sulfur was used to replace organosulfur to achieve a highly efficient and atom-economical multicomponent C-S coupling reaction.
      原文链接:
    • 万方数据
    • 维普

    Simulation of gas-solid flow characteristics of the circulating fluidized bed boiler under pure-oxygen combustion conditions

    Kaixuan GaoXiwei KeBingjun DuZhenchuan Wang...
    9-19页
    查看更多>>摘要：Under the pressure of carbon neutrality, many carbon capture, utilization and storage technologies have witnessed rapid development in the recent years, including oxy-fuel combustion (OFC) technology. However, the conventional OFC technology usually depends on the flue gas recirculation system, which faces significant investment, high energy consumption, and potential low-temperature corrosion prob-lem. Considering these deficiencies, the direct utilization of pure oxygen to achieve particle fluidization and fuel combustion may reduce the overall energy consumption and CO2-capture costs. In this paper, the fundamental structure of a self-designed 130 t·h-1 pure-oxygen combustion circulating fluidized bed (CFB) boiler was provided, and the computational particle fluid dynamics method was used to analyze the gas-solid flow characteristics of this new-concept boiler under different working conditions. The results indicate that through the careful selection of design or operational parameters, such as average bed-material size and fluidization velocity, the pure-oxygen combustion CFB system can maintain the ideal fluidization state, namely significant internal and external particle circulation. Besides, the contraction section of the boiler leads to the particle backflow in the lower furnace, resulting in the particle suspension concentration near the wall region being higher than that in the center region. Conversely, the upper furnace still retains the classic core-annulus flow structure. In addition to increasing solid circulation rate by reducing the average bed-material size, altering primary gas ratio and bed inventory can also exert varying degrees of influence on the gas-solid flow characteristics of the pure-oxygen combustion CFB boiler.
      原文链接:
    • 万方数据
    • 维普

    Causal temporal graph attention network for fault diagnosis of chemical processes

    Jiaojiao LuoZhehao JinHeping JinQian Li...
    20-32页
    查看更多>>摘要：Fault detection and diagnosis (FDD) plays a significant role in ensuring the safety and stability of chemical processes. With the development of artificial intelligence (AI) and big data technologies, data-driven approaches with excellent performance are widely used for FDD in chemical processes. However, improved predictive accuracy has often been achieved through increased model complexity, which turns models into black-box methods and causes uncertainty regarding their decisions. In this study, a causal temporal graph attention network (CTGAN) is proposed for fault diagnosis of chemical processes. A chemical causal graph is built by causal inference to represent the propagation path of faults. The attention mechanism and chemical causal graph were combined to help us notice the key variables relating to fault fluctuations. Experiments in the Tennessee Eastman (TE) process and the green ammonia (GA) process showed that CTGAN achieved high performance and good explainability.
      原文链接:
    • 万方数据
    • 维普

    A concise review on surface and structural modification of porous zeolite scaffold for enhanced hydrogen storage

    B.A.AbdulkadirR.S.R.Mohd ZakiA.T.Abd WahabS.N.Miskan...
    33-53页
    查看更多>>摘要：Investigating zeolites as hydrogen storage scaffolds is imperative due to their porous nature and favor-able physicochemical properties. Nevertheless, the storage capacity of the unmodified zeolites has been rather unsatisfactory (0.224％-1.082％ (mass)) compared to its modified counterpart. Thus, the contemporary focus on enhancing hydrogen storage capacities has led to significant attention towards the utilization of modified zeolites, with studies exploring surface modifications through physical and chemical treatments, as well as the integration of various active metals. The enhanced hydrogen storage properties of zeolites are attributed to the presence of aluminosilicates from alkaline and alkaline-earth metals, resulting in increased storage capacity through interactions with the charge density of these aluminosilicates. Therefore, there is a great demand to critically review their role such as well-defined topology, pore structure, good thermal stability, and tunable hydrophilicity in enhanced hydrogen storage. This article aimed to critically review the recent research findings based on modified zeolite performance for enhanced hydrogen storage. Some of the factors affecting the hydrogen storage ca-pacities of zeolites that can affect the rate of reaction and the stability of the adsorbent, like pressure, structure, and morphology were studied, and examined. Then, future perspectives, recommendations, and directions for modified zeolites were discussed.
      原文链接:
    • 万方数据
    • 维普

    Experimental study on secondary air mixing along the bed height in a circulating fluidized bed with a multitracer-gas method

    Qingyu ZhangLeming ChengKun LiQixun Kang...
    54-62页
    查看更多>>摘要：A multitracer-gas method was proposed to study the secondary air (SA) mixing along the bed height in a circulating fluidized bed (CFB) using carbon monoxide (CO), oxygen (O2), and carbon dioxide (CO2) as tracer gases. Experiments were carried out on a cold CFB test rig with a cross-section of 0.42 m × 0.73 m and a height of 5.50 m. The effects of superficial velocity, SA ratio, bed inventory, and particle diameter on the SA mixing were investigated. The results indicate that there are some differences in the measure-ment results obtained using different tracer gases, wherein the deviation between CO and CO2 ranges from 42％to 66％and that between O2 and CO2 ranges from 45％to 71％in the lower part of the fluidized bed. However, these differences became less pronounced as the bed height increased. Besides, the high solid concentration and fine particle diameter in the CFB may weaken the difference. The measurement results of different tracer gases show the same trends under the variation of operating parameters. Increasing superficial velocity and SA ratio and decreasing particle diameter result in better mixing of the SA. The effect of bed inventory on SA mixing is not monotonic.
      原文链接:
    • 万方数据
    • 维普

    Experimental and numerical investigations on micromixing performance of multi-orifice cross-flow jet mixers

    Hang YangZhaojin LuLikun MaWei Yin...
    63-72页
    查看更多>>摘要：Multi-orifice cross-flow jet mixers (MOCJMs) are used in various industrial applications due to their excellent mixing efficiency, but few studies have focused on the micromixing performance of MOCJMs. Herein, the flow characteristics and micromixing performance inside the MOCJM were investigated using experiments and computational fluid dynamics (CFD) simulations based on the Villermaux/Dushman system and the finite-rate/modified eddy-dissipation model. The optimal A value was correlated with the characteristic parameters of MOCJMs to develop a CFD calculation method applicable to the study of the micromixing performance of the MOCJMs. Then the micromixing efficiency was evaluated using the segregation index XS, and the effects of operational and geometric parameters such as mixing flow Reynolds number (ReM), flow ratio (RF), total jet area (ST), the number of jet orifices (n), and outlet configuration on the micromixing efficiency were investigated. It was found that the intensive turbulent region generated by interactions between jets, as well as between jets and crossflows, facilitated rapid reactions. XS decreased with increasing ReM and decreasing RF. Furthermore, MOCJMs with lower ST, four jet orifices, and the narrower outlet configuration demonstrated a better micromixing efficiency. This study contributes to a deeper understanding of the micromixing performance of MOCJMs and provides valuable guidance for their design, optimization, and industrial application.
      原文链接:
    • 万方数据
    • 维普

    Oil-in-water nanoemulsions loaded with lycopene extracts encapsulated by spray drying: Formulation, characterization and optimization

    Junyang LiRoberta CampardelliGiuseppe FirpoJingtao Zhang...
    73-81页
    查看更多>>摘要：Lycopene is very susceptible to degradation once released from the protective chromoplast environment. In this study, oil-in-water (O/W) nanoemulsions coupled with spray drying technology were applied for the encapsulation and stabilization of lycopene extracted from tomato waste. Tomato extract was ob-tained by ultrasound-assisted extraction. Nanoemulsions were prepared by a high-speed rotor stator using isopropyl myristate as the oil phase and Pluronic F-127 as the emulsifier for the aqueous external phase. The effect of emulsification process parameters was investigated. Spray drying of the produced emulsions was attempted to obtain a stabilized dry powder after the addition of a coating agent. The effect of different coating agents (maltodextrin, inulin, gum arabic, pectin, whey and poly-vinylpyrrolidone), drying temperature (120-170 °C), and feed flow rate (3-9 ml·min-1) on the obtained particles was evaluated. Results revealed that the emulsion formulation of 20/80 (O/W) with 1.5％ (mass fraction) of Pluronic F-127 as stabilizer in the aqueous phase resulted in a stable nanoemulsion with droplet sizes in the range of 259-276 nm with a unimodal and sharp size distribution. The extract in the nanoemulsion was well protected at room temperature with a degradation rate of lycopene of about 50％during a month of storage time. The most stable emulsions were then processed by spray drying to obtain a dry powder. Spray drying was particularly successful when using maltodextrin as a coating agent, obtaining dried spherical particles with mean diameters of (4.87±0.17) mm with a smooth surface. The possibility of dissolving the spray dried powder in order to repristinate. The original emulsion was also successfully verified.
      原文链接:
    • 万方数据

    Modeling analysis of cobalt-based Fischer-Tropsch catalyst particles

    Huashuai WuGang WangYong YangYongwang Li...
    82-92页
    查看更多>>摘要：The influences of particle size, shape, and catalyst distribution on the reactivity and hydrocarbon product selectivity of a cobalt-based catalyst for Fischer-Tropsch synthesis were investigated in the present work. A self-consistent kinetic model for Fischer-Tropsch reaction proposed here was found to correlate experimental data well and hence was used to describe the consumption rates of reactants and for-mation rates of hydrocarbon products. The perturbed-chain statistical associating fluid theory equation of state was used to describe vapor-liquid equilibrium behavior associated with Fischer-Tropsch reac-tion. Local interaction between intraparticle diffusion and Fischer-Tropsch reaction was investigated in detail. Results showed that in order to avoid the adverse influence of intraparticle diffusional limitations on catalyst reactivity and product selectivity, the use of small particles is necessary. Large eggshell spherical particles are shown to keep the original catalyst reactivity and enhance the selectivity of heavy hydrocarbon products. The suitable layer thickness for a spherical particle with a diameter of 2 mm is nearly 0.15 mm. With the same outer diameter of 2 mm, the catalyst reactivity and heavy product selectivity of hollow cylindrical particles with a layer thickness of 0.25 mm are found to be larger than eggshell spherical particles. From the viewpoint of catalytic performance, hollow cylindrical particles are a better choice for industrial applications.
      原文链接:
    • 万方数据
    • 维普

    Amine-functionalized metal organic framework@graphene oxide as filler in PAEK-containing carboxyl group membrane for ultrafiltration with ultra-high permeability and strong fouling resistance

    Zhaoli WangWenjing LiYi ZhangYanyin Cheng...
    93-103页
    查看更多>>摘要：Achieving high fouling resistance and permeability using membrane separation technology in water treatment processes remains a challenge. In this work, a novel mixed-matrix membrane (MMM) (pol-y(arylene ether ketone) [PAEK]-containing carboxyl groups [PAEK-COOH]/UiO-66-NH2@graphene oxide [GO]) with superb fouling resistance and high permeability was prepared by the nonsolvent-induced phase separation method, by in-situ growth of UiO-66-NH2 on the GO layer, and by preparing hydrophilic PAEK-COOH. On the basis of the structure and performance analysis of the MMM, the maximum water flux reached 591.25 L·m-2·h-1 for PAEK-COOH/UiO-66-NH2@GO, whereas the retention rate for bovine serum albumin increased from 85.40％to 94.87％. As the loading gradually increased, the hydrophilicity of the MMMs increased, significantly enhancing their fouling resistance. The strongest anti-fouling ability observed was 94.74％, which was 2.02 times greater than that of the pure membrane. At the same time, the MMMs contained internal amide and hydrogen bonds during the preparation process, forming a cross-linked structure, which further enhanced the mechanical strength and chemical stability. In summary, the MMMs with high retention rate, strong permeability, and anti-fouling ability were suc-cessfully prepared.
      原文链接:
    • 万方数据
    • 维普

    Hierarchical multihead self-attention for time-series-based fault diagnosis

    Chengtian WangHongbo ShiBing SongYang Tao...
    104-117页
    查看更多>>摘要：Fault diagnosis is important for maintaining the safety and effectiveness of chemical process. Considering the multivariate, nonlinear, and dynamic characteristic of chemical process, many time-series-based data-driven fault diagnosis methods have been developed in recent years. However, the existing methods have the problem of long-term dependency and are difficult to train due to the sequential way of training. To overcome these problems, a novel fault diagnosis method based on time-series and the hierarchical multihead self-attention (HMSAN) is proposed for chemical process. First, a sliding window strategy is adopted to construct the normalized time-series dataset. Second, the HMSAN is developed to extract the time-relevant features from the time-series process data. It improves the basic self-attention model in both width and depth. With the multihead structure, the HMSAN can pay attention to different aspects of the complicated chemical process and obtain the global dynamic features. However, the multiple heads in parallel lead to redundant information, which cannot improve the diagnosis perfor-mance. With the hierarchical structure, the redundant information is reduced and the deep local time-related features are further extracted. Besides, a novel many-to-one training strategy is introduced for HMSAN to simplify the training procedure and capture the long-term dependency. Finally, the effec-tiveness of the proposed method is demonstrated by two chemical cases. The experimental results show that the proposed method achieves a great performance on time-series industrial data and outperforms the state-of-the-art approaches.
      原文链接:
    • 万方数据
    • 维普