DOI: 10.1016/j.jcou.2017.03.014
Scopus记录号: 2-s2.0-85017093805
论文题名: Control of CO2 absorption capacity and kinetics by MgO-based dry sorbents promoted with carbonate and nitrate salts
作者: Joo H. ; Cho S.J. ; Na K.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 19 起始页码: 194
结束页码: 201
语种: 英语
英文关键词: Absorption capacity and kinetics
; Carbonate
; CO2 sorbent
; MgO
; Nitrate
Scopus关键词: Calcium carbonate
; Carbonates
; Carbonation
; Kinetics
; Magnesia
; Nitrates
; Precipitation (chemical)
; Rate constants
; Salts
; Sorbents
; Sorption
; Stability criteria
; Absorption capacity
; Absorption kinetics
; Absorption performance
; Absorption process
; Linear driving force
; Selection criteria
; Temperature swings
; Thermal gravimetric analyzer
; Carbon dioxide
英文摘要: MgO-based dry sorbents promoted by various metal carbonate and nitrate salts were prepared via co-precipitation of three precursors (MgO/carbonate/nitrate), wherein effects of metal types in carbonate and nitrate salt, and mole ratios in MgO/carbonate/nitrate on the absorption capacity and kinetics were investigated comprehensively during CO2 absorption/regeneration cycles under temperature swing absorption process (absorption at 300 °C with 15% CO2 and regeneration at 500 °C with 100% CO2 under dry condition). The CO2 absorption capacity was analyzed with thermal gravimetric analyzer, and the absorption kinetics were compared with rate constant derived by using linear driving force model. According to the change of metal types among Li, Na, K and Ca while variation of the composition in MgO/carbonate/nitrate, CO2 absorption capacity and kinetics were changed dramatically. MgO promoted with CaCO3 and NaNO3 (MC0.19N0.20) was the best sorbent showing 30.3 wt%, but significant decrease in absorption capacity was observed during three cycles. MgO promoted with Na2CO3 and NaNO3 (MN0.19N0.15) exhibited the largest rate constant of 0.811 min-1, whereas other sorbents are distributed down to 0.046 min-1. In view of sorbent stability, MgO with K2CO3 and KNO3 (MK0.40K0.03) might be good sorbents since they showed very stable absorption/regeneration performances without significant decrease in working capacity during 10 cycles. The present result on the MgO-based sorbent preparation and CO2 absorption performances would provide important selection criteria for MgO-based dry sorbents based on high working capacity, rapid absorption rate, and stability showing stable absorption/regeneration reversibility. © 2017 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52741
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Joo H.,Cho S.J.,Na K.. Control of CO2 absorption capacity and kinetics by MgO-based dry sorbents promoted with carbonate and nitrate salts[J]. Journal of CO2 Utilization,2017-01-01,19