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1. Research on Reactor Design in Propane Dehydrogenation Process | |||
TANG Rongqing,YANG Manxia,YANG Lina,LIANG Tingting,JIN Mingxin | |||
Chemical Engineering 05 March 2020 | |||
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Abstract:The success of chemical technology process development depends to a large extent on the control level and control ability of the temperature, concentration, residence time and temperature distribution of the fluid in the reactor, and the distribution of residence time. The research project of the propane dehydrogenation process is mainly based on the Catofin process, and the Catofin process is improved by combining the catalyst and operating conditions of the Oleflex process. The main reactors involved in this process are propane dehydrogenation reactors. This paper uses Aspen Plus, Comsol, SW6 and other computer software to select the structure of its core equipment, and details the manufacturing process of the reactor to determine the reaction The volume and approximate structure of the reactor achieve the control requirements of chemical process parameters such as temperature distribution, concentration distribution, and reaction time, so that product quality and performance can be guaranteed. Finally, the reactor design specification is listed in a table. | |||
TO cite this article:TANG Rongqing,YANG Manxia,YANG Lina, et al. Research on Reactor Design in Propane Dehydrogenation Process[OL].[ 5 March 2020] http://en.paper.edu.cn/en_releasepaper/content/4751033 |
2. Effect of Compressive Pressure on the Contact Behavior Between Bipolar Plate and Carbon Paper in a Proton Exchange Membrane Fuel Cell | |||
LI Guo,TAN Jinzhu,GONG Jianming | |||
Chemical Engineering 19 March 2012 | |||
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Abstract:The compressive pressure during the assembly of proton exchange membrane (PEM) fuel cells has a great influence in the contact resistance between bipolar plate (BPP) and gas diffusion layer (GDL). In this paper, three different types of carbon papers are used as GDL materials. The contact resistance between BPP and GDL is measured under different applying clamping torques. Based on experimental data, a relationship of compressive pressure resulting from the applying claming torque and contact resistivity is established by the least square method. Based on the commercial code ABAQUS, a program is developed to predict the contact resistivity. In addition, the changes of contact pressure, contact area and porosity of GDL are studied. The experimental result shows that the contact resistivity nonlinearly decreases with increasing of the applying clamping torque. The thicker GDL without fillers has a higher contact resistivity. Finite element analysis (FEA) results show that both contact area and contact pressure increase with increasing of the compressive pressure in the same fillet radius of the rib except that the fillet radius is zero. The contact resistivity decreases with increase of the clamping force, which is consistent with the experimental results. The porosity decreases with increase of the clamping force. So the clamping force should be chosen carefully considering both the effect of contact resistance and porosity during the PEM fuel cell operation. The contact behavior can be predicted very well by finite element analysis instead of experimental test. | |||
TO cite this article:LI Guo,TAN Jinzhu,GONG Jianming. Effect of Compressive Pressure on the Contact Behavior Between Bipolar Plate and Carbon Paper in a Proton Exchange Membrane Fuel Cell[OL].[19 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4470612 |
3. Chemical aging of the silicone rubber in a simulated and three accelerated proton exchange membrane fuel cell environments | |||
LI Guo,TAN Jinzhu,GONG Jianming | |||
Chemical Engineering 13 March 2012 | |||
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Abstract:Long-term stability and durability of gaskets in Proton Exchange Membrane (PEM) fuel cell are important to both sealing and the electrochemical performance of PEM fuel cells. In this paper, the time-dependent aging process of silicone rubber, which is one of the potential gasket materials for PEM fuel cells, is investigated in one simulated PEM fuel cell environment and three accelerated durability test (ADT) media at 70 oC. Optical microscopy is employed to observe the topographical changes on the surfaces of samples. Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) are used to study the surface chemistry of the samples before and after exposure to the test environments over time. The optical microscopy results indicate that the surface conditions of the samples change from initially smooth to rough, crack appearance and finally crack propagation. The ATR-FTIR and XPS results reveal that the degradation mechanisms of the silicone rubber are likely due to the de-crosslinking and chain scission in the backbone,and the acid has a significant effect on the degradation. | |||
TO cite this article:LI Guo,TAN Jinzhu,GONG Jianming. Chemical aging of the silicone rubber in a simulated and three accelerated proton exchange membrane fuel cell environments[OL].[13 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4470697 |
4. Lattice Boltzmann Simulation on Flow in Porous Medium of Ceramic Filter | |||
Sun Meiyu,Ji Zhongli ,Chen Honghai | |||
Chemical Engineering 24 December 2007 | |||
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Abstract:The lattice Boltzmann method (LBM) is applied to simulate three dimensional flows through ceramic matrixes. The simplified structures are generated randomly by computer. As a test of the lattice Boltzmann code, the relation between pressure drop and superficial velocity in porous medium is obtained which agrees well with Darcy’s Law. Local velocities of different pores are also analyzed. The velocity distributions are approximate to parabolas. Calculation results show that the Darcy number increases along quadric curves with the increase of sphere diameter and porosity. | |||
TO cite this article:Sun Meiyu,Ji Zhongli ,Chen Honghai. Lattice Boltzmann Simulation on Flow in Porous Medium of Ceramic Filter[OL].[24 December 2007] http://en.paper.edu.cn/en_releasepaper/content/17318 |
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