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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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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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    Efficient and reversible separation of NH3 by deep eutectic solvents with multiple active sites and low viscosities

    Jiayin ZhangLu ZhengSiqi FangHongwei Zhang...
    97-105页
    查看更多>>摘要：The efficient separation and collection of ammonia(NH3)during NH3 synthesis process is essential to improve the economic efficiency and protect the environment.In this work,ethanolammonium hy-drochloride(EtOHACl)and phenol(PhOH)were used to prepare a novel class of deep eutectic solvents(DESs)with multiple active sites and low viscosities.The NH3 separation performance of EtOHACl+PhOH DESs was analyzed completely.It is figured out that the NH3 absorption rates in EtOHACl+PhOH DESs are very fast.The NH3 absorption capacities are very high and reach up to 5.52 and 10.74 mol kg-1 at 11.2 and 100.4 kPa under 298.2 K,respectively.In addition,the EtOHACl+PhOH DESs present highly selective absorption of NH3 over N2 and H2 and good regenerative properties after seven cycles of absorption/desorption.The intrinsic separation mechanism of NH3 by EtOHACl+PhOH DESs was further revealed by spectroscopic analysis and quantum chemistry calculations.
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    Ultra-high specific surface area activated carbon from Taihu cyanobacteria via KOH activation for enhanced methylene blue adsorption

    Yifang MiWenqiang WangSen ZhangYalong Guo...
    106-116页
    查看更多>>摘要：Cyanobacteria-based activated carbon(CBAC)was successfully prepared by pyrolysis-activation of Taihu cyanobacteria.When the impregnation ratio and activated temperature were 2 and 800 ℃,respectively,the optimal CBACs possessed an ultra-high specific surface(2178.90 m2·g-1)and plenty of micro-and meso-pores,as well as a high pore volume(1.01 cm3·g-1).Ascribed to ultra-high surface area,π-πinteraction,electrostatic interaction,as well as hydrogen-bonding interactions,the CBACs displayed huge superiority in efficient dye removal.The saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg g-1,superior to that of other reported biomass-activated carbons.The adsorption was endothermic and modeled well by the pseudo-second-order kinetic,intra-particle diffusion,and Langmuir models.This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.
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    Hydrodynamic analysis of carbon nanotube clusters in distributor-less conical fluidized beds with step-by-step scaling

    Tianle ZhangWenjuan BaiQianpeng DongDianming Chu...
    117-125页
    查看更多>>摘要：As a high-performance material with great application potential,the application of carbon nanotubes has been limited by their production volume.A distributor-less conical fluidized bed is the main equipment used in the industrial production of carbon nanotubes.To improve the production volume and product quality of carbon nanotubes,the study of fluidized-bed-diameter scaling is important.Three different diameters of distributor-less conical fluidized beds were established,and then the particle behavior and bubble characteristics of carbon nanotube clusters at these bed diameters were investigated.Time-series and wavelet analysis methods were used to analyze the pressure-fluctuation signals inside the fluidized beds.Results showed that the distributor-less design caused the airflow to break through the middle of the bed,which did not change with the change in bed diameter.The powder-bridging phenomenon of carbon nanotube clusters in a 100-mm-diameter fluidized bed was related to the special microstructure of carbon nanotube clusters.The frequency of pressure fluctuations in the bed decreased nonlinearly with increasing bed diameter.This study can guide the design and scale-up of distributor-less conical fluidized beds,especially for the scale-up of carbon nanotube production equipment,which can contribute to the improvement of carbon nanotubes'capacity and quality in industrial production.
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    Enhanced gas production and CO2 storage in hydrate-bearing sediments via pre-depressurization and rapid CO2 injection

    Hongnan ChenYifei SunBojian CaoMinglong Wang...
    126-134页
    查看更多>>摘要：Carbon emission reduction and clean energy development are urgent demands for mankind in the coming decades.Exploring an efficient CO2 storage method can significantly reduce CO2 emissions in the short term.In this study,we attempted to construct sediment samples with different residual CH4 hy-drate amounts and reservoir conditions,and then investigate the potentials of both CO2 storage and enhanced CH4 recovery in depleted gas hydrate deposits in the permafrost and ocean zones,respectively.The results demonstrate that CO2 hydrate formation rate can be significantly improved due to the presence of residual hydrate seeds;However,excessive residual hydrates in turn lead to the decrease in CO2 storage efficiency.Affected by the T-P conditions of the reservoir,the storage amount of liquid CO2 can reach 8 times that of gaseous CO2,and CO2 stored in hydrate form reaches 2-4 times.Additionally,we noticed two other advantages of this method.One is that CO2 injection can enhance CH4 recovery rate and increases CH4 recovery by 10％-20％.The second is that hydrate saturation in the reservoir can be restored to 20％-40％,which means that the solid volume of the reservoir avoids serious shrinkage.Obviously,this is crucial for protecting the goaf stability.In summary,this approach is greatly promising for high-efficient CO2 storage and safe exploitation of gas hydrate.
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    Particle agglomeration and inhibition method in the fluidized pyrolysis reaction of waste resin

    Congjing RenPeng ZhangQi SongZhengliang Huang...
    135-147页
    查看更多>>摘要：This work investigated the pyrolysis reaction of waste resin in a fluidized bed reactor.It was found that the pyrolysis-generated ash would adhere to the surface of ceramic particles,causing particle agglom-eration and defluidization.Adding kaolin could effectively inhibit the particle agglomeration during the fluidized pyrolysis reaction through physical isolation and chemical reaction.On 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 resin.On 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.
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    Highly efficient CO2 capture using 2-methylimidazole aqueous solution on laboratory and pilot-scale

    Kun LiHan TangShuangshuang LiZixuan Huang...
    148-156页
    查看更多>>摘要：To date,the primary industrial carbon capture approach is still absorption using aqueous solutions of alkanolamines.Here,to pursue a substitute for the amine-based approach to improve the CO2 capture efficiency and decrease the energy cost further,we report a new carbon capture approach using a 2-methylimidazole(mIm)aqueous solution.The properties and sorption behaviors of this approach have been experimentally investigated.The results show that the mIm solution has higher CO2 absorption capacity under relatively higher equilibrium pressure(＞130 kPa)and lower desorption heat than the methyldiethanolamine solution.91.6％sorption capacity of mIm solution can be recovered at 353.15 K and 80 kPa.The selectivity for CO2/N2 and CO2/CH4 can reach an exceptional 7609 and 4324,respectively.Furthermore,the pilot-scale tests were also performed,and the results demonstrate that more than 98％of CO2 in the feed gas could be removed and cyclic absorption capacity can reach 1 mol·L-1.This work indicates that mIm is an excellent alternative to alkanolamines for carbon capture in the industry.
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    Mechanism study of Cu(Ⅱ)adsorption from acidic wastewater by ultrasonic-modified municipal solid waste incineration fly ash

    Shunda linYang LuLin ZhengLing Long...
    157-165页
    查看更多>>摘要：High concentrations of copper ions(Cu(Ⅱ))in water will pose health risks to humans and the ecological environment.Therefore,this study aims to utilize ultrasonic-cured modified municipal solid waste incineration(MSWI)fly ash for Cu(Ⅱ)adsorption to achieve the purpose of"treating waste by waste."The effects of pH,adsorption time,initial concentration,and temperature on the modified MSWI fly ash's adsorption efficiency were systematically studied in this article.The adsorption performance of the modified MSWI fly ash can be enhanced by the ultrasonic modification.At pH=2,3 and 4,the adsorption capacity of the modified MSWI fly ash for Cu(Ⅱ)increased by 2.7,1.9 and 1.2 times,respec-tively.Furthermore,it was suggested that the adsorption process of the modified MSWI fly ash can be better simulated by the pseudo-second-order kinetic model,with a maximum adsorption capacity calculated by the Langmuir model of 24.196 mg·g-1.Additionally,the adsorption process is spontaneous,endothermic,and chemisorption-dominated from the thermodynamic studies(ΔH and ΔS＞0,ΔG＜0).Finally,the enhanced adsorption performance of the modified MSWI fly ash for Cu(Ⅱ)may be attributed to electrostatic interaction and chelation effects.
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    In situ modification of heavy oil catalyzed by nanosized metal-organic framework at mild temperature and its mechanism

    Li WangJi-Xiang GuoRui-Ying XiongChen-Hao Gao...
    166-173页
    查看更多>>摘要：Two catalysts,nano-sized cobalt-metal-organic framework(Co-MOF)and nickel(Ni)-MOF,were suc-cessfully prepared by the modification method.Tetralin(C10H12)was used as the hydrogen donor for the catalytic cracking and hydrogenation modification study of the dehydrated crude oil from the Shengli Oilfield.The optimal reaction conditions were determined through orthogonal experiments,and the components of the crude oil and modified oil samples were analyzed.The results revealed that the nano-MOF catalysts were successfully prepared and exhibited high catalytic activity.They could catalyze the cracking of large molecules in heavy oil at mild temperatures(＜300 ℃),leading to the decomposition of the hydrogen donor.When the mass fraction of the catalyst was 0.2％,the mass fraction of the hydrogen donor was 1％,and the reaction temperature was 280 ℃,the Ni-MOF showed the best catalytic viscosity reduction effect.It could reduce the viscosity of heavy oil at 50 ℃ from 15761.9 mPa·s to 1266.2 mPa·s,with a viscosity reduction rate of 91.97％.The modification effect of Co-MOF was the next best,which could reduce the viscosity of heavy oil to 2500.1 mPa·s with a viscosity reduction rate of 84.14％.Mo-lecular dynamics simulations revealed a strong interaction force between the MOF surface and asphal-tene molecules.In the process of heavy-oil catalytic hydrogenation,the nano-MOF catalyst exhibited high catalytic activity.On the one hand,the empty d orbitals outside the metal atoms in the catalyst could polarize the carbon atoms in the organic matter,accelerating the breaking of long chains.On the other hand,the metal atoms in the catalyst could bond with the carbon σ bonds,breaking the carbon-carbon bonds.This disrupted the structure of the recombined components in the crude oil,irrevers-ibly reducing the viscosity of the heavy oil and improving its fluidity.
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    Effect of surfactant frequently used in soil flushing on oxygen mass transfer in micro-nano-bubble aeration system

    Mei BaiZhibin LiuZhu LiuChenfei He...
    174-181页
    查看更多>>摘要：In-site soil flushing and aeration are the typical synergetic remediation technology for contaminated sites.The surfactant present in flushing solutions is bound to affect the aeration efficiency.The purpose of this study is to evaluate the effect of surfactant frequently used in soil flushing on the oxygen mass transfer in micro-nano-bubble(MNB)aeration system.Firstly,bio-surfactants and chemical surfactants were used to investigate their effects on Sauter mean diameter of bubble(dBS),gas holdup(ε),volumetric mass-transfer coefficient(kLa)and liquid-side mass-transfer coefficient(kL)in the MNB aeration system.Then,based upon the experimental results,the Sardeing's and Frössling's models were modified to describe the effect of surfactant onkLin the MNB aeration.The results showed that,for the twenty aqueous surfactant solutions,with the increase in surfactant concentration,the value of dBS,kLa and kL decreased,while the value of ε and gas-liquid interfacial area(a)increased.These phenomena were mainly attributed to the synergistic effects of immobile bubble surface and the suppression of coales-cence in the surfactant solutions.In addition,with the presence of electric charge,MNBs in anionic surfactant solutions were smaller and higher in number than in non-ionic surfactant solutions.Furthermore,the accumulation of surfactant on the gas-liquid interface was more conspicuous for small MNB,so the reduction of kL in anionic surfactant solutions was larger than that in non-ionic surfactant solutions.Besides,the modified Frössling's model predicted the effect of surfactant on kL in MNB aeration system with reasonable accuracy.
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    Uncertainty and disturbance estimator-based model predictive control for wet flue gas desulphurization system

    Shan LiuWenqi ZhongLi SunXi Chen...
    182-194页
    查看更多>>摘要：Wet flue gas desulphurization technology is widely used in the industrial process for its capability of efficient pollution removal.The desulphurization control system,however,is subjected to complex re-action mechanisms and severe disturbances,which make for it difficult to achieve certain practically relevant control goals including emission and economic performances as well as system robustness.To address these challenges,a new robust control scheme based on uncertainty and disturbance estimator(UDE)and model predictive control(MPC)is proposed in this paper.The UDE is used to estimate and dynamically compensate acting disturbances,whereas MPC is deployed for optimal feedback regulation of the resultant dynamics.By viewing the system nonlinearities and unknown dynamics as disturbances,the proposed control framework allows to locally treat the considered nonlinear plant as a linear one.The obtained simulation results confirm that the utilization of UDE makes the tracking error negligibly small,even in the presence of unmodeled dynamics.In the conducted comparison study,the introduced control scheme outperforms both the standard MPC and PID(proportional-integral-derivative)control strategies in terms of transient performance and robustness.Furthermore,the results reveal that a low-pass-filter time constant has a significant effect on the robustness and the convergence range of the tracking error.
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