石油焦-氧气气化制备合成气的模拟研究
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摘要
基于Aspen Plus建立石油焦-氧气流化床气化制备合成气模型,用仿真模拟结果与实验值相比较,发现模拟值与实验值基本吻合。并且分析了不同条件下(气化温度、气化压强、氧气当量比(ER)、水蒸气与石油焦质量比(m(水)/m(石油焦))对合成气(H2+CO)体积分数、合成气产率、V(H2)/V(CO)的影响。结果表明:当氧气当量比为0.45时,合成气体积分数、合成气产率达到最大;升高温度有利于制备合成气,当温度达到850℃时,合成气体积分数和产率上升的趋势比较小;高压不利于制备合成气;通入水蒸气可以调节V(H2)/V(CO)的值,当m(水)/m(石油焦)为3.5时,此时的合成气可以制备甲醇。
Based on Aspen Plus software,an oxygen gasification model of petroleum coke for syngas gas production in the fluidized bed was established.Comparing the simulation results with the experimental data,it was found that the simulated values are in agreement with the experimental values.The influence of gasification temperature,gasification pressure,ER and the mass ratio of steam to petroleum coke on the volume fraction of syngas(the volume fraction of hydrogen and carbon monoxide),syngas yield and the molar ratio of H2 to CO was analyzed.The results show that when the oxygen equivalent ratio is 0.45,the syngas volume fraction and the syngas yield reach the maximum.The higher temperature contributes to more syngas yield.When the temperature reaches 850 ℃,the volume fraction and syngas yield increase slightly.The high pressure is not conducive to the synthesis of syngas.The steam can adjust the molar ratio of H2 to CO in syngas.When the the mass ratio of H2 O to PC is 0.35,the syngas can be prepared methanol.
Based on Aspen Plus software,an oxygen gasification model of petroleum coke for syngas gas production in the fluidized bed was established.Comparing the simulation results with the experimental data,it was found that the simulated values are in agreement with the experimental values.The influence of gasification temperature,gasification pressure,ER and the mass ratio of steam to petroleum coke on the volume fraction of syngas(the volume fraction of hydrogen and carbon monoxide),syngas yield and the molar ratio of H2 to CO was analyzed.The results show that when the oxygen equivalent ratio is 0.45,the syngas volume fraction and the syngas yield reach the maximum.The higher temperature contributes to more syngas yield.When the temperature reaches 850 ℃,the volume fraction and syngas yield increase slightly.The high pressure is not conducive to the synthesis of syngas.The steam can adjust the molar ratio of H2 to CO in syngas.When the the mass ratio of H2 O to PC is 0.35,the syngas can be prepared methanol.
引文
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[4]冯飞,宋国辉,沈来宏,等.生物质气化制取合成气的模拟[J].现代化工,2012,32(12):100-103.FENG Fei,SONG Guohui,SHEN Laihong,et al.Simulation of bio-syngas from biomass gasification[J].Modern Chemical Industry,2012,32(12):100-103.
[5]田伟,阎富生,黄永红,等.石油焦流化床气化模拟研究[J].材料与冶金学报,2017,164):232-236.TIAN Wei,YAN Fusheng,HUANG Yonghong,et al.Gasification simulation of petroleum coke in fluidized bed[J].Materials and Metallurgy Journal,2017,16(4):256-260.
[6]陈汉平,赵向富,米铁,等.基于ASPEN PLUS平台的生物质气化模拟[J].华中科技大学学报(自然科学版),2007,35(9):49-52.CHEN Hanping,ZHAO Xiangfu,MI Tie,et al.Simulation of biomass gasification by ASPEN PLUS[J].Journal of Huazhong University of Science and Technology,2007,35(9):49-52.
[7]刘荣厚.生物质能工程[M].北京:化学工业出版社,2009:222-223.LIU Ronghou.Biomass Energy Engineering[M].Beijng:Chemical Industry Press,2009:222-223.
[8]车德勇,李少华,杨文广,等.稻壳在固定床中空气气化的数值模拟[J].太阳能学报,2013,33(1):100-104.CHE Deyong,LI Shaohua,YANG Wenguang,et al.Numerical simulation of rice husk air gasification in fixed bed[J].Solar Journal,2013,33(1):100-104.
[9]BARRERA R,SALAZAR C,PREZ,J F.Thermochemical equilibrium model of synthetic natural gas production from coal gasification using Aspen Plus[J].International Journal of Chemical Engineering,2014,4(2):1-18.
[10]YI Q,FENG J,LI W Y.Optimization and efficiency analysis of polygeneration system with coke-oven gas and coal gasified gas by Aspen Plus[J].Fuel,2012,96(7):131-140.
[11]XIAO J,HUANG J,ZHONG Q,et al.Modeling and simulation of petroleum coke calcination in pot calciner using two-fluid model[J].Journal of Metals,2016,68(2):643-655.
[12]于德平.石油焦气化反应特性与动力学研究[D].湘潭:湘潭大学,2013.YU Dengping.Study on Gasification Reaction Characteristics and Kinetics of Petroleum Coke[D].Xiangtan:Xiangtan University,2013.