工业尾气中的乙烯在络合型吸附剂上的变压吸附性能  

Pressure Swing Adsorption of Complex Adsorbent for Ethylene in Industrial Off-Gas

作　　者：姚稳[1] 刘晓勤[1] 戴岳[1] 姚虎卿[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《石油化工》2005年第7期660-663,共4页Petrochemical Technology

基　　金：国家自然科学基金资助项目(20276029)

摘　　要：为解决环氧乙烷装置排放气中C2H4的回收问题,采用N J型吸附剂,考察了C2H6,CO2,CH4,O2对吸附剂吸附C2H4的影响,测定了吸附剂对环氧乙烷装置排放气中C2H4的吸附性能,并初步考察了解吸性能。实验结果表明,除O2对吸附C2H4有一定影响外,N J型吸附剂吸附C2H4具有很好的稳定性,通过减压和抽真空可使吸附剂再生。在C2H4-C2H6,C2H4-CO2,C2H4-CH4体系中,C2H4的吸附容量均达10mL/g以上;在O2存在的条件下,C2H4的吸附容量约为7.5mL/g;在环氧乙烷装置的排放气体系中,C2H4的吸附容量约为6mL/g;脱附气体中C2H4的体积分数可达到50%。With the purpose of recovering ethylene from industrial off-gas of ethylene oxide (EO) plant by pressure swing adsorption (PSA), the performance of self-made NJ adsorbent was investigated focusing on the effects of C2H6, CO2, CH4 and O2 on adsorption of C2H4. The NJ adsorbent had great PSA stability, except O2 present in off-gas had some influence on C2H4 adsorption. The adsorbent could be regenerated by depressurizing and vacuum degassing. Adsorption capacity of C2H4 in C2H4-C2H6, C2H4-CO2, C2H4-CH4 systems were all above 10 mL/g; the adsorption capacity of C2H4 in C2H4-CH4-O2 was about 7.5 mL/g; the adsorption capacity of C2H4 in the off-gas from the EO plant was about 6 mL/g. The CH4 content in desorption gas reached 50% (volume fraction) before displacement.

关 键 词：吸附剂 变压吸附 环氧乙烷 乙烯 

分 类 号：TQ424.1[化学工程]