能源化学(英文版)

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (6): 902-906.

• ARTICLES • 上一篇    下一篇

Removal of carbonyl sulfide from CO2 stream using AgNO3-modified NaZSM-5

Yanjun Wang, Shaoyun Chen, Heng Chen, Xingzhou Yuan, Yongchun Zhang   

  1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116023, Liaoning, China
  • 收稿日期:2013-03-25 修回日期:2013-05-26 出版日期:2013-11-20 发布日期:2013-11-28
  • 通讯作者: Yongchun Zhang

Removal of carbonyl sulfide from CO2 stream using AgNO3-modified NaZSM-5

Yanjun Wang, Shaoyun Chen, Heng Chen, Xingzhou Yuan, Yongchun Zhang   

  1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116023, Liaoning, China
  • Received:2013-03-25 Revised:2013-05-26 Online:2013-11-20 Published:2013-11-28

摘要： Removal of carbonyl sulfide (COS) from CO2 stream is significant for the production and utilization of food grade CO2. This study investigates the adsorption performance of Ag/NaZSM-5 as adsorbent prepared by incipient wetness impregnation for the removal of COS from a CO2 stream in a fixed-bed adsorption apparatus. Effects of various conditions on the preparation of adsorbent, adsorption and desorption were intensively examined. The results revealed that COS can be removed to below 1×10-9 from a CO2 stream (1000 ppm COS/CO2) using Ag/NaZSM-5 (10 wt% AgNO3) with an adsorption capacity of 12.86 mg·g-1. The adsorbent can be fully regenerated using hot air at 450 ℃. The adsorption ability remained stable even after eight cycles of regeneration.

关键词: carbonyl sulfide, adsorption, π-complexation, completely regeneration, Ag-modified adsorbents

Abstract: Removal of carbonyl sulfide (COS) from CO2 stream is significant for the production and utilization of food grade CO2. This study investigates the adsorption performance of Ag/NaZSM-5 as adsorbent prepared by incipient wetness impregnation for the removal of COS from a CO2 stream in a fixed-bed adsorption apparatus. Effects of various conditions on the preparation of adsorbent, adsorption and desorption were intensively examined. The results revealed that COS can be removed to below 1×10-9 from a CO2 stream (1000 ppm COS/CO2) using Ag/NaZSM-5 (10 wt% AgNO3) with an adsorption capacity of 12.86 mg·g-1. The adsorbent can be fully regenerated using hot air at 450 ℃. The adsorption ability remained stable even after eight cycles of regeneration.

Key words: carbonyl sulfide, adsorption, π-complexation, completely regeneration, Ag-modified adsorbents