【摘要】 测定了乙烯、二氧化碳、氮气和氧气在碳分子筛上的吸附平衡与吸附动力学数据,确定了变压吸附法回收乙烯的动力学机理是由于二氧化碳、氮气、氧气以及乙烯在碳分子筛上扩散速率的差异.考察了吸附时间与吸附压力两个因素对分离性能的影响,当吸附压力为400kPa,吸附时间为90s 时,产品气中乙烯浓度最高,为96.43% .初步确定了变压吸附工艺由四步组成:吸附、均压、抽真空、均压.更多还原

【Abstract】 The adsorption equilibrium and dynamic data of ethene, carbon dioxide, nitrogen and oxygen on carbon molecular sieve were measured. It is find that the dynamic theory of pressure swing adsorption for ethene recovery was determined and it was caused by the differences of diffusion rate of carbon dioxide, nitrogen, oxygen and ethene on carbon molecular sieve. The effects of adsorption time and adsorption pressure on ethene recovery were studied on a pilot equipment, when adsorption pressure set 400kPa, adsorption time 90s the recovered gases with the ethene percentage of 96.43%. The basic processes of pressure swing adsorption were determined with four steps: adsorption, pressure equal, vacuuming and pressure equal.更多还原