Performance of nano-CaCO3 coated with SiO2 on CO2 adsorption at high temperature
• 现代化工技术 • Previous Articles Next Articles
WU Rong;WU Sufang
Online:
Published:
吴嵘;吴素芳
浙江大学材料与化工学院,浙江 杭州 310027
Abstract: Nano-CaCO3 particles were surface-coated with SiO2 by the sol-gel method and used as the high temperature CO2 adsorption material.CaCO3 samples prepared at 60—90℃ were characterized with TEM, EDS and XRD methods and the initial and final decomposition temperature were determined with TGA.The CO2 adsorption ratio and carbonation-calcination characteristics were evaluated in a φ12 mm fixed bed reactor.The analytical results showed that there was an amorphous SiO2 film formed on the surface of nano-CaCO3,and the atomic ratio of Si to Ca is 1∶39.The initial and final decomposition temperatures were 595—620℃ and 800—820℃ respectively.The maximum CO2 adsorption ratio of SiO2 coated with nano-CaCO3 was 92.1% at 600℃with a 10% increase as compared with the uncoated nano-CaCO3 particles.After 20 cyclic carbonation and calcination runs, CO2 adsorption ratio of the SiO2 coated samples was 63%.The XRD analysis illustrated that the crystal type of nano-CaCO3 had no change after 20 cyclic runs.
WU Rong;WU Sufang.
吴嵘;吴素芳 . 包硅改性纳米碳酸钙应用于高温CO2吸附的性能 [J]. CIESC Journal.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: https://hgxb.cip.com.cn/EN/
https://hgxb.cip.com.cn/EN/Y2006/V57/I7/1722