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This paper presents a mathematical model based on the reaction rate expressions to describe the displacement of methane conversion in the steam reforming. The effect of several parameters including weight hourly space velocity (WHSV), load-to-surface ratio, reaction pressure, hydrogen partial pressure in permeate side and reaction temperature were investigated. Simulation and experimental results showed that a conversion higher than 80% could be achieved in a palladium membrane reactor at reaction temperature of 500 °C relative to 850 °C in a conventional fixed bed reactor (FBR). Besides, the yield of CO (<2%) in membrane reactor was much lower than that (>50%) in the FBR, which indicated the significant depression of CO production in use of membrane reactor. 相似文献
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以华北C4液化气为原料,采用小型固定流化床为芳构化反应装置,考察了空速对芳构化产物产率、转化率、马达法辛烷值(MON)和研究法辛烷值(RON)、气体产品组成和液体产品组成的影响规律。实验结果表明,随着空速的增加,干气和液化气的产率逐渐增加,而汽油、柴油和焦炭的产率呈缓慢下降趋势;华北C4液化气的转化率都在97%以上,且随空速升高而逐渐增加;液体产物的MON和RON随空速升高先增加然后减少,在空速1h-1~9h-1范围内存在最大值。在430℃条件下,华北C4液化气芳构化实验室内的最佳空速为3~5h-1。 相似文献
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由宏君 《河北工业大学学报》2006,35(6):49-54
以兰炼催化汽油为原料,采用小型固定流化床为芳构化反应装置,考察了反应条件对芳构化产物产率、转化率、MON和RON和液体产品组成的影响规律.实验结果表明,随着反应温度的升高,干气、液化气和焦炭产率呈上升趋势,而汽油和柴油产率呈下降趋势;随着空速的增加,干气、液化气和焦炭产率基本上呈缓慢下升的趋势,而汽油和柴油产率基本上呈缓慢上升的趋势;随着剂油比的提高,干气、液化气和焦炭产率逐渐增大,汽油和柴油产率逐渐减小;随着水油比的加大,汽油、柴油和焦炭产率和产品的马达法辛烷值(MON)和研究法辛烷值(RON)逐渐减少,干气和液化气产率变化不大.确定了兰炼FCC汽油的实验室的最佳操作条件为反应温度430~450℃、空速20~30h1、剂油比6~9,水油比为0.05左右. 相似文献
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Sofiane Arab Jean-Marc CommengeJean-François Portha Laurent Falk 《Chemical Engineering Research and Design》2014
This work investigates the impact of catalyst structuring into particles or monoliths on methanol production from only CO2 and H2 at a large scale. Methanol synthesis in multi-tubular reactors is evaluated using packed-bed and monolithic reactors by modeling heat and mass transfer in each reactor. The obtained simulation results show that, at low gas hourly space velocity (GHSV = 10,000 h−1), the performances of both reactor technologies are similar. In this case, the packed-bed reactor technology is the most appropriate technology due to its simplicity of installation and operation. At high GHSV (25,000 h−1), the packed-bed reactor technology is limited by a considerable pressure drop that causes an important loss in productivity due to thermodynamic equilibrium, whereas the monolithic reactors exhibit negligible pressure drop and achieve far better performances. 相似文献
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以华北C4液化气和华北C4液化气与中国石油兰州石化公司炼油厂FCC汽油为原料,采用小型固定流化床为芳构化反应装置,考察了反应温度和空速对华北C4液化气芳构化产物收率、转化率、马达法辛烷值、研究法辛烷值、液体产品组成的影响规律和华北C4液化气与中国石油兰州石化公司炼油厂FCC汽油的不同进料形式对芳构化反应的影响。实验结果表明,随反应温度的升高,干气、液化气和焦炭收率呈上升趋势,而汽油和柴油收率呈下降趋势,液体产物的马达法辛烷值和研究法辛烷值随反应温度的升高先增大后减小,当温度为430 ℃时,马达法辛烷值和研究法辛烷值存在最大值;随着空速的增加,干气和液化气的收率逐渐增加,而汽油、柴油和焦炭的收率呈缓慢下降的趋势;华北C4液化气的转化率均在97%以上,且随空速的升高而逐渐增加;液体产物的马达法辛烷值和研究法辛烷值随空速的升高先增加后减少,在空速(1~9) h-1内存在最大值。华北C4液化气芳构化实验室内的最佳操作条件:反应温度(430~450) ℃,空速(3~5) h-1。对于华北C4液化气与中国石油兰州石化公司炼油厂FCC汽油混炼而言,先通入汽油后通入液化气的汽油和柴油收率和液体中的芳烃含量明显高于液化气和汽油同时进料和先通入液化气后通入汽油。 相似文献
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