Journal of Chemical Engineering of Chinese Universities

 

Current Issue

  • Research process on low-temperature CO2 methanation catalysts

    LI Nina;LI Zhengjia;CEN Jie;YAO Nan;College of Chemical Engineering,Zhejiang University of Technology;

    This paper provides a review of the research progress in catalytic systems for low-temperature CO_2 methanation,which focuses on the detail discussion of the regulation effect of supports,promoters,and metals as active species on catalyst performance. In conventional catalytic systems, Ni-based catalysts have been widely studied due to their excellent activity and low cost. For example,the modified Mn-Ni/Al_2O_3 catalyst could achieve a CO_2 conversion of 88.9% and a CH_4 selectivity close to 100% at a reaction temperature of 220 ℃. Secondly,in terms of new catalytic technologies,the paper provides a detailed overview of recent advances in plasma-catalytic synergetic systems and photothermal catalyst. By activating CO_2 molecules through non-thermal plasma technology,the activation energy of the reaction can be significantly reduced. For example,in the plasma-catalytic synergetic system,the Ni/Al_2O_3 catalyst could achieve a CO_2 conversion of 60% and a CH_4 selectivity of 97% at a reaction temperature of 150 ℃. In addition,the introduction of photo-thermal catalytic technology further expands the reaction pathways for low-temperature CO_2 methanation. The NiFe M(M=Al, Zr, Mg, Cr) catalyst could achieve a CO_2 conversion up to 98% and a CH_4 selectivity of 99% under light illumination. The introduction of these novel technologies offers a broader application prospect for low-temperature CO_2 methanation. Finally, based on the current research status,the paper provides an outlook on the future development direction of the low-temperature CO_2 methanation field, which clarifies the key scientific challenges and technical difficulties that need to be addressed and offers the valuable insights for further research in this area.

    2026 01 v.40 [Abstract][OnlineView][Download 1029K]

  • Research progress on process intensification of mass transfer and reaction in the microreactors

    QI Yabing;ZHAO Yajuan;Munaiwaier·Tuerxun;ZHANG Sijing;School of Chemistry and Chemical Engineering,Xi′an University of Architecture and Technology;

    Microreactors have been widely applied in many fields such as chemical, pharmaceutical,environmental,materials,metallurgy,energy,and medical diagnosis industries due to these advantages,for example, small volume, high heat and mass transfer performances, high security, and good controllability.Therein, the global researchers have always focused on intensification of mass transfer and reaction in the microreactors. The structure of microreactors,the enhancements of ultrasonic field,centrifugal field,magnetic field,light and stir have been systematically reviewed. Then,the reasons of intensification of mass transfer and reaction in the microreactors have been in-depth analysis. Finally,the development trends on intensification of mass transfer and reaction in the microreactors have been prospected. In order to enhance mass transfer and reaction in the microreactors,the following measures may be taken:(1) The formation mechanism of droplets,liquid slugs,liquid flows,bubbles,gas slugs and gas flows,and affecting factors and transformation mechanism of fluid flow pattern in the microreactors have been in-depth-study.(2) The satisfactory reinforcement effect will achieve by using the coupling measures. For example,integration of spiral microchannels and ultrasonic field,combination of spiral microchannels and photocatalysis, and integration of gas stir and rotating microchannels.(3) The performance optimization and improvement of microreactors have been realized through numerical simulation,experimental study, and scale-up process. The ultimate aim is the application of microreactors in industrial production.

    2026 01 v.40 [Abstract][OnlineView][Download 1568K]

  • The rheological properties of the polyamic acid solution synthesized from pyromellitic dianhydride and 4,4'-diaminodiphenyl ether

    WANG Jinke;Abduhelil·Yakup;DONG Yue;DONG Xiao;DAI Zhenyu;LUO Chen;ZHU Dezhao;MA Yue;YUE Changtao;College of Science,China University of Petroleum(Beijing);Petrochemical Research Institute PetroChina;National Elite Institute of Engineering,CNPC;Department of Thermal Scienceand Energy Engineering,University of Scienceand Technology of China;

    Polyamide acid(PAA) solutions were synthesized using pyromellitic dianhydride(PMDA) and 4,4'-oxydianiline(ODA) as monomers within the PMDA-ODA system, employing N,N-dimethylacetamide(DMAC),dimethyl sulfoxide(DMSO),N,N-dimethylformamide(DMF),and N-methyl-2-pyrrolidone(NMP)as solvents. The rheological properties of these PAA solutions were characterized via rotational rheometry,encompassing flow ramp tests, small-amplitude oscillatory frequency sweeps, and small-amplitude oscillatory temperature sweeps. The flow behavior of the system was described using the power-law model. Results demonstrate that the system exhibits pseudoplastic(shear-thinning) non-Newtonian behavior,albeit exhibiting only mild nonNewtonian characteristics. Both the storage modulus(G') and loss modulus(G'') were observed to increase with rising angular frequency. The evolution of the moduli during heating was analyzed by combining in situ Fourier transform infrared spectroscopy and thermogravimetric analysis(TG). The findings reveal that during the initial heating stage, the moduli are significantly influenced by solvent volatility; the concurrent increase in solution concentration due to solvent evaporation constitutes the primary factor driving modulus enhancement. For solvents exhibiting lower volatility, the PAA solution modulus initially decreases with increasing temperature due to intensified molecular thermal motion,followed by an increase. A distinct modulus plateau region emerges during the intermediate heating stage,where modulus variations remain relatively minor. Beyond 130 °C,a pronounced imidization reaction occurs within the system,triggering a sharp increase in modulus and a transition from viscousdominant to elastic-dominant behavior. After reaching 180 ℃,the storage modulus exceeds 10~6 Pa.

    2026 01 v.40 [Abstract][OnlineView][Download 1225K]

  • Study on the transport process and heat transfer of boiling vapor film on PFA hydrophobic surface

    WANG Jiahui;ZHENG Yi;MA Xuehu;Liaoning Key Laboratory of Clean Utilization of Chemical Resources,Institute of Chemical Engineering,Dalian University of Technology;Sinopec Qingdao Research Institute of Safety Engineering;

    Petroleum products are essential energy sources with increasing demand worldwide. At the same time,the storage of liquefied natural gas(LNG) in chemical plants is getting more and more attention,among which the boiling liquid expanding vapor explosion(BLEVE) accidents are the most common accidents in chemical plants,so how to reduce the boiling heat transfer coefficient(HTC) is very important. Compared to hydrophilic surfaces,hydrophobic surfaces have hydrophobic properties,which allow bubbles to link into a film at low heat flux and reduce the HTC. Based on the principle of surface wettability,different sizes of spherical tanks in the chemical plant are scaled down in equal proportions.The boiling process of PFA hydrophobic surfaces with different curvatures was investigated and compared with smooth copper surfaces by combining heat transfer data and visualization pictures. The results show that the critical heat flux density(CHF) and HTC of the surfaces coated with PFA hydrophobic coatings are significantly reduced,in which the highest HTC at the center angle of 0° of the four PFA hydrophobic surfaces with curvatures of 35~(-1),47~(-1),80~(-1),and 120~(-1) mm~(-1) are reduced by 59.5%,80.7%,61.4% and 60.0%,respectively,in comparison with the curved smooth surfaces.

    2026 01 v.40 [Abstract][OnlineView][Download 1532K]

  • Kinetic comparison and simulation of methanol synthesis catalysts

    KONG Lingkai;ZHANG Dazhou;LU Wenxin;Wuhuan Engineering Co.Ltd.;

    Currently,few reports have been published on the quantitative comparison of catalysts for methanol synthesis from syngas in industry. The kinetic models of seven kinds of methanol synthesis catalysts at home and abroad were summarized in this paper. Through theoretical analysis and computational fluid dynamics simulation,the reaction rates of each kinetic model under the same operating conditions were calculated,the reaction behaviors of various types of catalysts in a single tube of the Lurgi-type methanol synthesis reactor were analyzed,and the key operating parameters such as temperature and concentration distributions,conversion and daily methanol yield were compared. The results show that the C-B catalyst has a relatively high reaction rate under syngas conditions,and the reaction tube filled with this catalyst has the highest daily methanol yield.

    2026 01 v.40 [Abstract][OnlineView][Download 1501K]

  • Nucleation mechanism and crystallization kinetics of potassium dihydrogen phosphate in ethylene glycol-water system

    MAI Wenhao;LYU Hao;ZHENG Yayuan;DU Huaiming;MA Ting;XU Xinping;GOU Cheng;ZHOU You;School of Chemical Engineering,Sichuan University of Science and Engineering;

    Potassium dihydrogen phosphate(KH_2PO_4) is a crucial chemical component widely applied in industry,agriculture,and medicine. Although its industrial production has been relatively mature,issues such as inclusions, cracks, and dendritic crystal growth often occur in pure water systems, leading to poor optical uniformity and a low laser damage threshold. To address this problem, this study explored the growth and nucleation kinetics of KH_2PO_4 in an ethylene glycol-water system at a specific ratio.First, by controlling the solution's supersaturation ratio(S) and temperature,the relationship between the induction period and nucleation rate was analyzed. The results showed that homogeneous nucleation dominated when S>1.08,while heterogeneous nucleation dominated when S<1.06. Regarding nucleation parameters, an increase in the supersaturation ratio significantly reduced the nucleation free energy barrier, critical nucleation radius, and critical number of nucleation molecules, while increasing the primary nucleation rate, which confirmed the important roles of temperature and supersaturation ratio in the nucleation process. Analysis of the surface entropy factor demonstrated that the crystallization of KH_2PO_4 primarily followed a continuous growth mechanism.Second, the effects of rotation speed,supersaturation ratio,and suspension density on particle size,growth rate,and nucleation rate were investigated. The linear growth rate of KDP was fitted and calculated using the two-parameter C-R model and three-parameter ASL model,and the kinetic equations for the growth and nucleation processes were determined.This study provides a reference for solving core issues in industrial KDP synthesis,such as crystal defects,high energy consumption,and unstable processes.

    2026 01 v.40 [Abstract][OnlineView][Download 1519K]

  • Production of xylitol from L-Arabinose by recombinant Escherichia coli

    XU Xudong;YUAN Dongxu;LIN Jianping;JIANG Yiqi;WU Mianbin;Key Laboratory of Biomass Chemical Engineering of Ministry of Education,College of Chemical and Biological Engineering,Zhejiang University;Ningbo Innovation Center,Zhejiang University;School of Biological and Chemical Engineering,NingboTech University;

    L-Arabinose is a crucial component of hemicellulose hydrolysate. In the chemical production process of xylitol,it is often discharged along with the xylose mother liquor,leading to resource waste and environmental pollution. In this study, a biosynthetic pathway for converting L-Arabinose into xylitol was established in Escherichia coli W3110. A multicistron expression module containing three enzymes required for xylitol biosynthesis,namely DPE,AraA,and LXR,was constructed. Meanwhile,the araBAD and lyxK genes in the LArabinose metabolic branch pathway of the E. coli W3110 genome were knocked out,and the xylitol-producing strain ??W-DLA was successfully obtained. Shake-flask fermentation was carried out using 10 g·L~(-1),L-Arabinose as the substrate and 10 g·L~(-1) glycerol as the co-substrate. The results showed that after 30 h of fermentation,the xylitol yield reached 8.26 g·L~(-1),and the conversion rate of L-Arabinose was 92.3%. The culture medium of the engineered strain ΔW-DLA was optimized through single-factor experiments and response-surface experiments. After optimization,??W-DLA produced 9.46 g·L~(-1) xylitol after 24 hours of fermentation,and the xylitol production rate was increased by 39.3% compared with that before optimization. This study provides a new way for the resourceutilization of xylose mother liquor.

    2026 01 v.40 [Abstract][OnlineView][Download 1021K]

  • Solid-phase peptide synthesis under microwave power-temperature synergistic control

    LI Fei;YANG Xu;SU Xianbin;College of Chemical Engineering,Nanjing Tech University;

    This study focuses on exploring the synergistic interaction effect between temperature fields and electromagnetic fields during microwave-assisted solid-phase peptide synthesis(SPPS). A self-developed microwave irradiation–temperature control circulation system was employed to achieve precise regulation of both microwave power and reaction temperature. Under continuous microwave irradiation,the kinetics of peptide chain coupling and 9-fluorenylmethoxycarbonyl(Fmoc) deprotection were investigated, establishing optimal reaction durations(3.5 min for coupling and 2.5 min+2.5 min for deprotection). Based on these parameters,a model system featuring a representative difficult sequence in SPPS was selected. The synthesis performance under three different heating modes—continuous microwave,pulsed microwave(duty cycle 0.6),and conventional water bath—was compared under equivalent temperature conditions. The results demonstrated that continuous microwave irradiation significantly improves product purity and reduces the duration of key reaction steps by approximately 70%. These findings provide a novel engineering solution for the efficient synthesis of complex peptides.

    2026 01 v.40 [Abstract][OnlineView][Download 1401K]

  • Efficient recovery of spent LiFePO4 cathode powder using salt leaching-oxidation cycle process

    WANG Kai;HOU Xiaojing;HE Chaojun;WU Kejun;HE Chaohong;Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology,College of Chemical and Biological Engineering,Zhejiang University;Institute of Zhejiang University-Quzhou;Hangzhou Qizhen Technology Co.Ltd.;

    In order to realize the efficient and low-cost recycling of spent LFP cathode powder,the spent LFP cathode powder was recovered through the salt leaching-oxidation cycle process. FeCl_3 was used as the leaching agent,and the FeCl_2 in the leaching solution was oxidized back to FeCl_3 using H_2O_2,enabling the regeneration of the leaching agent. Under optimized conditions,the leaching efficiency of Li reached 99.56% in the first leaching cycle and remained at 97.37% after ten cycles. The residue was crude FePO_4. The purer LiCl solution was obtained by adding KOH to precipitate Fe~(2+),Fe~(3+),and Al~(3+) in the final leaching solution,and the concentration of Li~+ was 4.80 mol·L~(-1). Economic evaluations of three methods, i.e., salt leaching-oxidation cycle, selective lithium extraction by acid leaching,and coupled salt leaching-extraction,revealed that the salt leaching-oxidation cycle process consumes less water and incurs lower costs,making it highly promising for industrial application.

    2026 01 v.40 [Abstract][OnlineView][Download 1113K]

  • Effect of particle size distribution of ball-milled seeds on the crystallization and separation performance of DD3R zeolite membrane

    LIU Haiquan;DU Peng;ZHANG Yuting;GU Xuehong;State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University;

    To prevent the formation of SGT zeolite, ball-milled Sigma-1 zeolites with a uniform particle size distribution were used to prepare hollow fiber DD3R zeolite membranes for CO_2/CH_4 separation. Effects of ballmilling parameters and centrifugation on the particle size distribution of Sigma-1 seeds were systematically investigated. When the ball to powder ratio(BPR),speed and time were 25,300 r·min~(-1) and 0.5 h,the fraction of agglomerated flakes, average particle size and span value of ball-milled seed were 7 wt%, 370 nm and 1.4,respectively. The agglomerated flakes caused the growth of the impurity crystal phase of SGT,which significantly reduced the gas separation performance of membranes. After centrifugation,the agglomerated flakes were removed and a uniform seed was obtained. This seed had an average particle size of 360 nm and a span value of 0.8,and was then used to prepare pure-phase DD3R zeolite membrane, which exhibited a CO_2 permeance of 1.57×10~(-7) mol·m~(-2)·s~(-1)·Pa~(-1) and a CO_2/CH_4 selectivity of 398 at 30 ℃ and 0.1 MPa.

    2026 01 v.40 [Abstract][OnlineView][Download 1989K]

  • Preparation of thermoplastic polyimide composite film and its application in adhesive-free copper-clad laminates

    YE Zhiqin;XIAO Di;WANG Dan;QIN Zuzeng;MO Rongming;LU Hao;SU Tongming;LUO Xuan;XIE Xinling;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,School of Chemistry and Chemical Engineering,Guangxi University;Guangxi Fimart Technology Co.Ltd.;University Engineering Research Center of Green Chemical New Materials,School of Chemistry and Chemical Engineering,Guangxi University;

    Flexible copper-clad laminate(FCCL) is a key substrate material in fields such as mobile devices,wearable electronics,and biosensors. The purpose of this research is to address the problems of traditional threelayer copper-clad laminates(3L-FCCL) relying on epoxy resin adhesives,which suffer from issues such as thick adhesive layers and insufficient heat resistance. Developed an adhesive-free double-sided copper-clad laminates(2L-FCCL) with excellent dimensional stability,heat resistance and high peel strength. In this research,zinc sulfidethermoplastic polyimide(ZnS-TPI) was prepared by introducing ether bonds and asymmetric structures and zinc sulfide(ZnS) particles as fillers by quaternary copolymer-thermal method. The purchased high-modulus lowthermal expansion polyimide(PI) film was used as the base film,and then ZnS-TPI precursor solution was used as the coating material to prepare thermoplastic polyimide(TPI/PI/TPI) composite film by coating-thermal imide method. Finally,2L-FCCL was prepared by pressing copper foil and TPI/PI/TPI composite film by hot pressing.The composite film showed excellent comprehensive properties, the thermal decomposition temperature was as high as 541.3 ℃,the coefficient of thermal expansion(CTE) of 18.9×10~(-6)·K~(-1). Additionally,the composite film exhibits good dielectric properties, with a dielectric constant of 3.55 and a dielectric loss of 0.008 4. Under optimized lamination conditions(350 ℃, 3×10~6 Pa, 60 s), the 2L-FCCL exhibited a peel strength of 1.35N·mm~(-1), indicated that the TPI/PI/TPI composite film is an excellent adhesive-free FCCL interlayer dielectric material. The research conclusion provides an effective strategy for the development of high-performance adhesivefree copper clad laminate.

    2026 01 v.40 [Abstract][OnlineView][Download 1574K]

  • The preparation and rate charge/discharge performance of PANI/GO connected by ionic and hydrogen bonds

    YANG Fanming;XIAO Lang;FU Xiaoting;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, College of Materials and Chemical Engineering, Hunan City University;

    In order to improve the rate charge/discharge performance and cyclic performance of graphite oxide(GO),PANI/GO composites with excellent charge/discharge performance were prepared by grafting polyaniline(PANI) on GO through ionic and hydrogen bonds. The physical characteristics of PANI/GO were analyzed by X-ray diffraction, infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersion spectrum and N_2 adsorption/desorption techniques. Besides, the charging/discharge performance of PANI/GO in KOH electrolyte was evaluated using a symmetrical capacitor. The results show that GO has a hexagonal phase crystalline structure. After the modification,GO is coated with PANI particles and the content of N atoms is increased by 5 times. In PANI/GO,PANI and GO are connected by ionic and hydrogen bonds and N exists in the framework as ─NH_2~+─, ─NH─ and ═N─ species. In KOH solution, the electrochemical feature of PANI/GO is dominated by both electrical double-layer capacitance(EDLC) and pseudocapacitance. At 0.2 A·g~(-1),the specific discharge capacity of PANI/GO is 99.1 F·g~(-1),which is 2.1 times that of GO. When the current density is enhanced to 10 A·g~(-1),the capacitance retention rate is 1.15 times that of GO. After 5 000 cycles,the capacity retention of PANI/GO is 4.9% higher than that of GO. The research results could provide reference for the improvement of rate charge/discharge properties and cyclic feature of low conductivity porous materials.

    2026 01 v.40 [Abstract][OnlineView][Download 1852K]

  • Continuous-flow synthesis of Au@Al2O3 nanoparticles and their surface-enhanced Raman scattering performance

    ZHU Hongfei;ZHANG Shiru;LIN Liangliang;Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University;

    To address the complex procedures and reliance on chemical reductants in conventional noble metal nanomaterial synthesis,a continuous-flow synthesis strategy was proposed by coupling a microchannel reactor with dielectric barrier discharge(DBD) plasma. HAuCl_4 was reduced by plasma within the microchannel to generate AuNPs, and combined with Al_2O_3 to form Au@Al_2O_3 nanoparticles. The effects of HAuCl_4 concentration,residence time, and plasma power on the products and their surface-enhanced Raman scattering(SERS)performance were systematically investigated. The results showed that optimal synthesis conditions were:HAuCl_4 concentration of 0.5 mmol·L~(-1),residence time of 6 seconds,and plasma power of 5.5 W. The SERS substrates constructed using Au@Al_2O_3 nanoparticles exhibited high sensitivity and stability in detecting various analytes. In particular, the detection limit for rhodamine B reached as low as 10~(-12) mol·L~(-1), with quantitative detection achievable over the range of 10~(-4) to 10~(-12) mol·L~(-1). These findings provide guidance for the efficient and controllable synthesis of functional nanomaterials.

    2026 01 v.40 [Abstract][OnlineView][Download 2257K]

  • Synthesis of multimorphic BiOBr via microwave hydrothermal/dilute acetic acid solvothermal method and its photocatalytic mechanism

    ZHOU Jingyi;QIN Jinmei;LIU Kun;SU Caiwei;WEI Xiaoyan;ZHANG Hanbing;QIN Xinyu;FAN Minguang;TONG Zhangfa;School of Resources,Environment and Materials Science,Guangxi University;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,School of Chemistry and Chemical Engineering,Guangxi University;

    To address the issues associated with conventional hydrothermal/solvothermal methods for synthesizing multimorphic BiOBr,such as long heating times,high temperatures,and the necessity to add additional modifiers or templating agents. In this work,a microwave-assisted hydro/solvothermal method was first employed to rapidly synthesize four distinct BiOBr morphologies(spherical(BiOBr_(U1)),flower-like(BiOBr_(U2)),thick-sheet(BiOBr_(A1)),and thin-sheet(BiOBr_(A2)) within 2 hours, using only readily available ultrapure water and dilute acetic acid as solvents and modulating only the reaction temperature. Optical characterization demonstrated visible-light absorption capability for all BiOBr photocatalysts, with absorption edges around 440 nm; BiOBr_(U1), BiOBr_(U2) exhibited stronger absorption in the UV-Vis region. The photocatalytic degradation performance was evaluated using tetracycline(TC) and ciprofloxacin(CIP) antibiotics. Under visible light irradiation for 120 minutes,both BiOBr_(U1) and BiOBr_(U2) demonstrated favorable catalytic degradation activity. Notably, BiOBr_(U1) achieved a degradation efficiency of approximately 76% for a 20 mg·L~(–1) TC solution. Besides,the TC degradation still reached 51% after under through three cycling experiments. Furthermore,the band structures and work functions of the four BiOBr samples were elucidated through combined characterization analysis and DFT calculations. The valence band(VB)position of the sheet-like BiOBr was determined to be sufficiently positive to generate strongly oxidizing photogenerated holes(h+),reacting with –OH to produce primarily ·OH as the oxidizing active species. BiOBr_(U1) microspheres possessed the highest oxidation and reduction potentials for their VB and conduction band(CB)positions, enabling the generation of both ·O_2~-via highly reductive photogenerated electrons(e~-) and ·OH via photogenerated h~+. This study provides a theoretical reference and technical support for the design and synthesis of BiOBr photocatalysts.

    2026 01 v.40 [Abstract][OnlineView][Download 1661K]

  • In situ construction of double S-Scheme NiO/Fe2O3/g-C3N4 heterojunction in collaboration with Photo-Fenton catalytic degradation of oxytetracycline

    MAO Na;MA Xinyue;TANG Jiaxuan;Weinan Normal University,College of Chemistry and Materials Science;

    Aiming at the problems of low response efficiency of g-C_3N_4 to visible light and low separation efficiency of photogenerated electron-hole, a method of loading semiconductors onto the surface of g-C_3N_4 is proposed, which can improve the application of g-C_3N_4 in the photocatalytic degradation of organic pollutants.NiO/Fe_2O_3/g-C_3N_4 composites were synthesized by immersion method,and characterized by XRD,FT-IR and PL.The research results show that the degradation rate of OTC can reach 89.1% under photo-Fenton system. After the addition of TEOA,the degradation efficiency of OTC solution decreased from 89.1% to 42.1%. It can be concluded that hole(h+),superoxide radical(·O_2~-) and hydroxyl radical (·OH) were the main factor affecting the degradation process of OTC. NiO/Fe_2O_3/g-C_3N_4 photocatalytic composites have good photocatalytic degradation effect on OTC solution because double-S Scheme heterojunction formed between Fe_2O_3, NiO and g-C_3N_4 semiconductor can effectively separate electrons and holes and inhibit electron hole recombination. The research conclusion provides a reference for the application of heterojunction catalysts in conjunction with photo-Fenton in wastewater treatment.

    2026 01 v.40 [Abstract][OnlineView][Download 1974K]

  • Energy consumption optimization of tail gas treatment unit based on Plackett-Burman design and response surface methodology

    YIN Xiaoyun;LI Jing;LIN Dong;ZHU Yingru;CAO Jie;ZHAO Liang;ZENG Pengsheng;YUE Tianqi;YUAN Ying;SUN Jie;Safety,Environment and Technology Supervision Research Institute,Southwest Oil and Gas Field Company,PetroChina;Key Laboratory of Shale Gas Evaluation and Exploitation of Sichuan Province;Planning and Engineering Institute,PetroChina;PetroChina Suining Natural Gas Purification Ltd.Co.;College of Petroleum Engineering,Xi'an Shiyou University;School of Oil & Natural Gas Engineering,Southwest Petr

    To address the issue of high energy consumption in tail gas treatment units of natural gas purification plants, this research proposes an optimization method that combines process simulation with statistical data analysis. Initially,the Plackett-Burman(PB) experimental design was employed to identify the key factors that significantly affect the energy consumption of tail gas treatment unit. Subsequently, the Box-Behnken Design(BBD) response surface methodology was used to optimize the tail gas treatment process. Finally,the effectiveness of the BBD optimization method was validated through simulation analysis. The results indicated that number of absorber stages,lean amine circulation rate,rich amine temperature to regenerator,and regenerator reflux ratio were the most significant factors affecting the energy consumption of tail gas treatment unit. The order of significance of these factors was as follows:lean amine circulation rate > regenerator reflux ratio > rich amine temperature to regenerator > number of absorber stages. The optimal process conditions determined were:number of absorber stages was 10,lean amine circulation rate was 90 000 kg·h~(-1),rich amine temperature to regenerator was 100 °C,and regenerator reflux ratio was 3.0. Under the optimized conditions,the energy consumption of the tail gas treatment unit could be reduced by 31.63%. The relative error between the software simulation value and the model prediction value was only 0.07%, confirming the accuracy and reliability of the established energy consumption model for the tail gas treatment unit. The research conclusions can provide a reference for energy optimization of tail gas treatment units in actual natural gas purification plants.

    2026 01 v.40 [Abstract][OnlineView][Download 1424K]