Removal of carbonyl sulfide from CO_2 stream using AgNO_3-modified NaZSM-5

• 作 者: Yanjun Wang Shaoyun Chen Heng Chen Xingzhou Yuan Yongchun Zhang
• 机 构: State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technol
• 出 处: Journal of Energy Chemistry
• 发表日期: 2013年06期
• 关键词: carbonyl adsorbent sulfide impregnation removed desorption regenerated breakthro

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 1×10-9from a CO2stream(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 C. The adsorption ability remained stable even after eight cycles of regeneration.

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 C. The adsorption ability remained stable even after eight cycles of regeneration.