In:
Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 284-287 ( 2013-1), p. 342-346
Abstract:
LiOH is known to be one of the most efficient CO 2 adsorbent because it reacts with CO 2 to form Li 2 CO 3 . However, LiOH still suffers from lack of enough hardness for practical use. In this study, various substrates, were modified with LiOH. Their X-ray diffraction patterns were investigated, and LiOH peak was observed from all prepared samples. CO 2 adsorption capacity of each prepared sample was measured by monitoring CO 2 concentration change during the adsorption process under constant CO 2 gas inflow condition. LiOH-modified Al 2 O 3 and zeolite 5A showed good CO 2 adsorption performance, while LiOH-modified AC and SiO 2 showed relatively poor CO 2 adsorption. Al 2 O 3 and zeolite 5A contains many basic functional groups of Al3+, which promote the neutralization reaction with acidic CO 2 . The effect of carrier gas, carrier gas flow rate, initial CO 2 concentration, and amount of LiOH-modified Al 2 O 3 loading was investigated. CO2 adsorption performance was better when the carrier gas was N 2 , because O 2 competes with CO 2 on LiOH. CO 2 adsorption performance was better with lower carrier gas flow rate, lower initial CO 2 concentration, and less loading of adsorbent due to the increase of contact time and contact points.
Type of Medium:
Online Resource
ISSN:
1662-7482
DOI:
10.4028/www.scientific.net/AMM.284-287
DOI:
10.4028/www.scientific.net/AMM.284-287.342
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2013
detail.hit.zdb_id:
2251882-4
