复合床层变压吸附法脱除合成气中微量CO和CO_2  

Removal of CO and CO_2 from ammonia synthesis gas by pressure swing adsorption with layered bed

作　　者：杨彦钢[1] 丁艳宾 马正飞[1] 刘晓勤[1] 

机构地区：[1]南京工业大学化学化工学院材料化学工程国家重点实验室,江苏南京210009 [2]上海穗杉实业有限公司,上海201506

出　　处：《化学工程》2012年第8期42-46,共5页Chemical Engineering(China)

基　　金：长江学者和创新团队发展计划资助项目(IRT0732);江苏省高校自然科学重大基础研究资助项目(08KJA530001)

摘　　要：采用分别装载活性炭和NA型吸附剂的复合床层的变压吸附工艺来脱除合成气中微量的CO和CO2,并利用Aspen-Adsim软件对其进行模拟和优化。模拟结果表明,吹扫气量对工艺性能有较大的影响,吹扫气由处在顺放步骤的吸附塔提供,因此在顺放步骤将床层压力降至较低压力,可获得较大的吹扫气量,此时的工艺性能也较优。模拟结果还表明,均压次数对工艺性能也有影响。在相同的顺放压降下,将变压吸附过程中的3次均压变为2次均压,可减少吸附剂用量,吸附剂产率更高,但塔底尾气量要相应增加。A layered Pressure Swing Adsorption（PSA） process with activated carbon and NA as adsorbents was developed for the removal of CO and CO2 from ammonia synthesis gas.The simulation results with Aspen-Adsim software show that the pressure difference Δp of the Provide Purge（PP） step determines the purge gas amount that has a great effect on the process performance.With the increase of Δp,the process performance would be improved.Besides,the number of pressure equalization used in one PSA cycle can also affect the process performance.Under the same Δp,when the three pressure equalizations in one cycle are reduced to the two ones,less amount of adsorbent would be used,and thus a higher yield is reached,but much more exhaust gas would be produced respectively.

关 键 词：CO CO2 ASPEN-ADSIM 复合床层 变压吸附 模拟 

分 类 号：TE665.3[石油与天然气工程—油气加工工程]