Continuous testing of silica-PEI adsorbents in a lab.-scale twin bubbling fluidized-bed system

Kim, Jae-Young; Woo, Je-Min; Jo, Sung-Ho; Lee, Seung-Yong; Moon, Jong-Ho; Kim, Hyunuk; Yi, Chang-Keun; Lee, Hyojin; Snape, Colin E.; Stevens, Lee; Sun, Chenggong; Liu, Hao; Liu, Jingjing; Park, Young Cheol

Abstract

In this study, a lab.-scale twin bubbling fluidized-bed system (TBS) has been used continuously to test the performance for CO2 adsorption of silica-PEI (S.PEI) adsorbents, containing 40 wt.% of PEI, which were supplied by the University of Nottingham (UNOTT). The TBS comprises bubbling-bed adsorption and desorption reactors, a riser for pneumatic conveying of solids from the adsorption to the desorption reactor, and a cyclone for solid-gas separation. The adsorbent prepared using PEI with a molecular mass of 800 (S.PEI-0.8K) was a preliminarily tested for almost 24 h at the given operating conditions by varying the inlet sorbent/CO2 mass ratio at the adsorber to analyse the CO2 removal efficiency in the adsorption reactor and the dynamic sorption capacity of the adsorbent. A 180-h continuous test was then carried out by changing various experimental conditions such as the H2O concentration, reaction temperature, solid layer height, reaction gas flow rate, and inlet sorbent/CO2 mass ratio at the adsorber using PEI with a molecular mass of 5000 (S.PEI-5K) adsorbent. In this test, a CO2 removal efficiency of above 80% and a dynamic sorption capacity greater than 6.0 wt.% were achieved.

Citation

Kim, J., Woo, J., Jo, S., Lee, S., Moon, J., Kim, H., …Park, Y. C. (2019). Continuous testing of silica-PEI adsorbents in a lab.-scale twin bubbling fluidized-bed system. International Journal of Greenhouse Gas Control, 82, 184-191. https://doi.org/10.1016/j.ijggc.2019.01.007

• Journal Article Type: Article
• Acceptance Date: Jan 9, 2019
• Online Publication Date: Jan 17, 2019
• Publication Date: 2019-03
• Deposit Date: Mar 18, 2019
• Publicly Available Date: Mar 18, 2019
• Journal: International Journal of Greenhouse Gas Control
• Print ISSN: 1750-5836
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 82
• Pages: 184-191
• DOI: https://doi.org/10.1016/j.ijggc.2019.01.007
• Keywords: Post-combustion CO2 capture; Dry solid sorbent; Silica-PEI adsorbents; Lab.-scale twin bubbling fluidized-bed system; Continuous performance test
• Public URL: https://nottingham-repository.worktribe.com/output/1660767
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S175058361830728X?via%3Dihub