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| 1 | Numerical Simulation of Particle Concentration in a Gas Cyclone Separator显示文摘The particle concentration inside a cyclone separator at different operation parameters was simulated with the FLUENT software. The Advanced Reynolds Stress Model (ARSM) was used in gas phase turbulence modeling. Stochastic Particle Tracking Model (SPTM) and the Particle-Source-In-Cell (PSIC) method were adopted for particles computing. The interaction between particles and the gas phase was also taken into account. The numerical simulation results were in agreement with the experimental data. The simulation revealed that an unsteady spiral dust strand appeared near the cyclone wall and a non-axi-symmetrical dust ring appeared in the annular space and under the cover plate of the cyclone. There were two regions in the radial particle concentration distribution, in which particle concentration was low in the inner region (r/R≤0.75) and increased greatly in the outer region (r/R>0.75). Large particles generally had higher concentration in the near-wall region and small particles had higher concentration in the inner swirling flow region. The axial distribution of particle concentration in the inner swirling flow (r/R≤0.3) region showed that there existed serious fine particle entrainment within the height of 0.5D above the dust discharge port and a short-cut flow at a distance of about 0.25D below the entrance of the vortex finder. The dimensionless concentration in the high-concentration region increased obviously in the upper part of the cyclone separation space when inlet particle loading was large. With increasing gas temperature, the particle separation ability of the cyclone was obviously weakened. | Xue Xiaohu Sun Guogang Wan Gujun Shi Mingxian | 2007 | Petroleum Science2007，4，3： | 8 |
| 2 | Hydrodynamics and Mass Transfer in a Modified Three-phase Airlift Loop Reactor显示文摘A modified internal-loop airlift reactor (MIALR) with a continuous slurry phase was studied to investigate the local hydrodynamic characteristics, including gas holdup, bubble size, bubble rise velocity and local mass transfer properties. Based on the analysis of geometrical construction and fluid properties of gas and slurry, MIALR was divided into six flow regions. In these flow regions, the local hydrodynamic characteristics were investigated over a wide range of operating variables. Furthermore, a new method was developed to measure the dissolved oxygen concentration. The volumetric mass-transfer coefficient in six flow regions was also calculated for comparison. | Liu Mengxi Lu Chunxi Shi Mingxian Ge Baoli Huang Jie | 2007 | Petroleum Science2007，4，3： | 5 |
| 3 | Post-riser Regeneration Technology in FCC Unit显示文摘In our present work, a post-riser regeneration technology (PRRT) for fluid catalytic cracking (FCC) units was developed to deal with increasingly heavier feedstock and hereby the larger amount of coke deposited on the catalyst particles during reaction. This technology can make full use of the advantages of riser regenerator, such as high coke-burning efficiency and low residual carbon, and at the same time overcome its disadvantages, such as difficulty in starting combustion. The average particles concentration on the cross section of the system was studied on a large scale cold model experimental set-up. Also a necessary software was developed by combining the hydrodynamics research results in our work with the coke-burning kinetics model and the heat and mass transfer model developed by previous researchers. The simulation results showed that the PRRT could increase regeneration capability by 16.28%-26.24% over the conventional turbulent fluidized bed regenerator under the similar operation conditions, and that the residual carbon could be kept below 0.1 wt %. | Liu Xiancheng Lu Chunxi Shi Mingxian | 2007 | Petroleum Science2007，4，2： | 3 |
| 4 | Studies on strongly swirling flows in the full space of a volute cyclone separator 显示文摘 | Hu Liyuan Zhou Lixing Shi Mingxian | 2005 | AIChE2005，51，3： | 1 |
| 5 | Solids Concentration Simulation of Different Size Particles in a Cyclone Separator 显示文摘 | Gujun Wan Guogang Sun XiaoXue Mingxian Shi | 2003 | Powder Technology2003，，183： | 1 |
| 6 | A universal model to calcu- late cyclone pressure drop 显示文摘 | Jianyi Chen Mingxian Shi | 2007 | Powder technology2007，171，3： | 1 |
| 7 | Numerical simulation of the asymmetry of gas - phase flow field in a volute cyclone separator 显示文摘 | WEI YAODONG SONG JIANFEI SHI MINGXIAN | 2005 | Progress in Natural Science Special Issue2005，15，： | 1 |
| 8 | Research on High-Efficiency Cyclone Separators and Their Optimum Design显示文摘ResearchonHighEficiencyCycloneSeparatorsandTheirOptimumDesignShiMingxian,JinYouhai,WuXiaolin,ChenJianyi,LiuJunren(UnitedRese... | Shi Mingxian, Jin Youhai, Wu Xiaolin, Chen Jianyi, Liu Junren (United Research Institute of Applied Chemistry and Chemical Engineering, University of Petroleum, Beijing 100083) | 1997 | 石油学报(石油加工)1997，13，S1： | 1 |
| 9 | Solids concentration simulation of different size particles in a cyclone separator显示文摘 | Wan Gujun Sun Guogang Xue Xiaohu Shi Mingxian | 2008 | Powder Technology2008，183，： | 1 |
| 10 | Studies on strongly swirling flows in the full space of a volute cyclone separator 显示文摘 | Hu Liyuan Zhoa Lixing Shi Mingxian | 2005 | AIChE Journal2005，51，3： | 1 |
| 11 | A universal model to calculate cyclone pressure drop显示文摘 | CHEN Jianyi SHI Mingxian | 2007 | Powder Technology2007，171，3： | 1 |
| 12 | Transient flow analysis of pulse-jet generating system in ceramic filter 显示文摘 | Ji Zhongli Shi Mingxian Ding Fuxing | 2004 | Powder Technology2004，139，3： | 1 |
| 13 | The cyclone separators performances under high temperature in PFBC unit显示文摘 | Shi Mingxian Liu Junren | 1995 | Heat recovery systems &CHP1995，，15： | 1 |
| 14 | Performance test of a 5 kW solid oxide fuel cell system under high fuel utilization with industrial fuel gas feeding显示文摘As the demand for green energy with high efficiency and low carbon dioxide(CO2)emissions has increased,solid oxide fuel cells(SOFCs)have been intensively developed in recent years.Integrated gasification fuel cells(IGFCs)in particular show potential for large-scale power generation to further increase system efficiency.Thus,for commercial application of IGFCs,it is important to design reliable multi-stacks for large systems that show long-term stability and practical fuel gas for application to industrial equipment.In this work,a test rig(of a 5 kW SOFC system,with syngas from industrial gasifiers as fuel)was fabricated and subjected to long-term tests under high fuel utilization to investigate its performance.The maximum steady output power of the system was 5700 W using hydrogen and 5660 W using syngas and the maximum steady electrical efficiency was 61.24%while the fuel utilization efficiency was 89.25%.The test lasted for more than 500 h as the fuel utilization efficiency was larger than 83%.The performances of each stack tower were almost identical at both the initial stage and after long-term operation.After 500 h operation,the performances of the stack towers decreased only slightly under lower current and showed almost no change under high current.These results demonstrate the reliability of the multi-stack design and the prospect of this SOFC power-generation system for further enlarging its application in a MWth demonstration. | Ming Xu Hanlin Wang Mingxian Liu Jianning Zhao Yuqiong Zhang Pingping Li Mingliang Shi Siqi Gong Zhaohuan Zhang Chufu Li | 2021 | International Journal of Coal Science & Technology2021，8，3： | 0 |
| 15 | Gas-solids separation model of a novel FCC riser terminator device: super short quick separator (SSQS)显示文摘The gas flow field and the separation efficiency of a novel fluid catalytic cracking (FCC) riser terminal device, named as Super Short Quick Separator (SSQS), were studied. On the basis of above investigations, a section-lateral-mixing separation model was proposed, which included both the effect of inertia and structure of gas outlet on particles capture. After final modification, the results predicted with this model could be in good agreement with the cold experimental data. According to this model, the separation efficiency of SSQS is mainly influenced by the difference between the arc radius and the center pipe radius as well as the magnitude of particle tangential velocity. | Chunxi LU Ruxin LI Xiancheng LIU Mingxian SHI | 2008 | Frontiers of Chemical Science and Engineering2008，2，4： | 0 |
| 16 | Porous carbon globules with moss-like surfaces from semi-biomass interpenetrating polymer network for efficient charge storage显示文摘The bio-nanotechnological fabrication of high-surface-area carbons has attracted widespread interest in supercapacitor applications by using readily-available natural products as raw materials or bio-templates,and is expected to refine on pore accessibility for compact energy storage. Here, a renovated design strategy of semi-biomass interpenetrating polymer network(IPN) derived carbon is demonstrated through physically knitting the biomacromolecule(sodium alginate, SA) polymeric chains into the highly crosslinked resorcinol-formaldehyde(RF) network and subsequent thermochemical conversion. Moleculelevel interlacing forces in such IPN efficiently relieve the RF skeleton shrinkage when producing carbon,while the other SA network addresses the macrophase separation issue to sacrifice as an in-knitted porogen and a morphology-directing agent. As a result, porous carbon globules are equipped with moss-like surfaces and interconnected pore architecture for high accessible electrode surface(1013 m^(2)/g), and efficient electrochemical responses are reached with the specific capacitance of 312 F/g at 1 A/g. Taking the advantage of 9 mol/kg NaClO_(4) complex-solvent electrolyte, the voltage window is extended to 2.4 V,endowing the two-electrode device with the high energy delivery of 32.3 Wh/kg at 240 W/kg. | Guchuan Ping Ling Miao Abuduheiremu Awati Xiaoyu Qian Ting Shi Yaokang Lv Yafei Liu Lihua Gan Mingxian Liu Dazhang Zhu | 2021 | Chinese Chemical Letters2021，32，12： | 0 |
| 17 | Modeling the gas flow in a cyclone separator at different temperature and pressure显示文摘The gas flow field in a cyclone separator,operated within a temperature range of 293 K-1373 K and a pressure range of 0.1-6.5 MPa,has been simulated using a modified Reynolds-stress model(RSM)on commercial software platform FLUENT 6.1.The computational results show that the temperature and pressure significantly influence the gas velocity vectors,especially on their tangential component,in the cyclone.The tangential velocity decreases with an increase in temperature and increases with an increase in pressure.This tendency of the decrease or increase,however,reduces gradually when the temperature is above 1000 K or the pressure goes beyond 1.0 MPa.The temperature and pressure have a relatively weak influence on the axial velocity profiles.The outer downward flow rate increases with a temperature increase,whereas it decreases with a pressure increase.The centripetal radial velocity is strong in the region of 0-0.25D below the vortex finder entrance,which is named as a short-cut flow zone in this study.Based on the simulation results,a set of correlations was developed to calculate the combined effects of temperature and pressure on the tangential velocity,the downward flow rate in the cyclone and the centripetal radial velocity in the short-cut flow region underneath the vortex finder. | Gujun WAN Guogang SUN Cuizhi GAO Ruiqian DONG Ying ZHENG Mingxian SHI | 2010 | Frontiers of Chemical Science and Engineering2010，4，4： | 0 |
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