Excellent thermal stability of potassium-based sorbent using ZrO₂ for post combustion CO₂ capture

详细信息    查看全文

• 作者：Soo Chool Lee ; Yong Mok Kwon ; Suk Yong Jung ; Joong Beom Lee ; Chong Kul Ryu ; Jae Chang Kim
• 关键词：Sorbent ; CO2 ; Capture ; ZrO2
• 刊名：Fuel
• 出版年：2014
• 出版时间：January, 2014
• 年：2014
• 卷：115
• 期：Complete
• 页码：97-100
• 全文大小：781 K

文摘

Effects of calcination temperature and atmosphere on the CO₂ sorption and regeneration characteristics of potassium-based sorbents using ZrO₂ or TiO₂ as supports were investigated in a fixed bed reactor in a temperature range 60-150 ¡ãC. We found in this study that potassium-based sorbents using ZrO₂ showed excellent CO₂ capture capacity regardless of calcination temperature and atmosphere. This is due to the fact that the potassium-based ZrO₂ sorbents form only K₂CO₃ and ZrO₂ phases without any new alloy species, whereas the inactive K-Ti alloy species such as K₂Ti₂O₅ and K₂Ti₆O₁₃ are formed during calcination for potassium-based sorbents using TiO₂. From these results, we conclude that the thermal stability of the sorbents can be improved by using ZrO₂ as a support instead of TiO₂.