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Continuous testing of silica-PEI adsorbents in a lab.-scale twin bubbling fluidized-bed system.
- Source :
- International Journal of Greenhouse Gas Control; Mar2019, Vol. 82, p184-191, 8p
- Publication Year :
- 2019
-
Abstract
- Highlights • A lab.-scale twin bubbling fluidized-bed CO 2 capture system has been developed. • Two kinds of silica-PEI adsorbents have been evaluated in a continuous way. • The CO 2 removal efficiency of above 80% was achieved. • The dynamic sorption capacity of above 6.0 wt.% was achieved. Abstract In this study, a lab.-scale twin bubbling fluidized-bed system (TBS) has been used continuously to test the performance for CO 2 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/CO 2 mass ratio at the adsorber to analyse the CO 2 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 H 2 O concentration, reaction temperature, solid layer height, reaction gas flow rate, and inlet sorbent/CO 2 mass ratio at the adsorber using PEI with a molecular mass of 5000 (S.PEI-5K) adsorbent. In this test, a CO 2 removal efficiency of above 80% and a dynamic sorption capacity greater than 6.0 wt.% were achieved. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17505836
- Volume :
- 82
- Database :
- Supplemental Index
- Journal :
- International Journal of Greenhouse Gas Control
- Publication Type :
- Academic Journal
- Accession number :
- 134848268
- Full Text :
- https://doi.org/10.1016/j.ijggc.2019.01.007