C2H4,CO2在分子筛上的吸附与分离

为回收利用石化生产装置的排放气和尾气中的Ｃ２Ｈ４，在Ｃａｈｎ－２０００电子天平上，采用重量法测定了Ｃ２Ｈ４、ＣＯ２气体在５Ａ分子筛和碳分子筛吸附剂上的吸附等温线和吸附速率曲线。结果表明，用碳分子筛作吸附剂，利用ＣＯ２的吸附速率远大于Ｃ２Ｈ４的吸附速率，可实现两种气体之间的分离。在双塔变压吸附分离装置上进行了Ｃ２Ｈ４－ＣＯ２气体混合物的分离试验，考察了吸附时间、吸附压力等条件对吸附分离性能的影响。结果表明，碳分子筛可有效地吸附脱除混合气中的ＣＯ２。

ADSORPTION SEPARATION OF ETHYLENE AND CARBON DIOXIDE ON MOLECULAR SIEVES

The adsorption and diffusion properties of ethylene and carbon dioxide on 5A zeolite and carbon molecular sieve were measured by gravimetric method with Cahn2000 electric balance. It was showed that ethylene and carbon dioxide can be separated by carbon molecular sieve due to the adsorption rate of carbon dioxide was much higher than that of ethylene. The separation of the mixture of ethylene and carbon dioxide was conducted on a pressure swing adsorption equipment with two columns, and the effect of experimental conditions on separation were investigated. The result showed that carbon dioxide can be adsorbed and removed from the mixture.