DOI: 10.1016/j.jcou.2019.02.002
Scopus记录号: 2-s2.0-85062686119
论文题名: Capturing CO 2 from air: Technical performance and process control improvement
作者: Bajamundi C.J.E. ; Koponen J. ; Ruuskanen V. ; Elfving J. ; Kosonen A. ; Kauppinen J. ; Ahola J.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 30 起始页码: 232
结束页码: 239
语种: 英语
英文关键词: Carbon dioxide
; Direct air capture
; Negative emissions
; Temperature vacuum swing adsorption
Scopus关键词: Adsorption
; Atmospheric humidity
; Carbon dioxide
; Land use
; Molar ratio
; Air captures
; Atmospheric conditions
; Control improvements
; Measurement-based
; Specific energy requirement
; Technical performance
; Thermal energy requirement
; Vacuum swing adsorptions
; Process control
英文摘要: Direct air capture (DAC) is a technology for collecting and concentrating carbon dioxide from ambient air. If driven with renewable power, DAC is potentially a negative CO 2 emissions technology that can compensate emissions from non-point sources such as aviation, shipping and land-use change. This study presents the results of 10 days capture campaign done between May and July 2018 plus a process control improvement test. The bench scale DAC device is composed of eight beds containing amine-functionalized adsorbent and follows a temperature and vacuum swing adsorption (TVSA) operation cycle. The outlet CO 2 concentration reached less than 100ppm at the start of the adsorption. Dynamic atmospheric conditions (varying T, relative humidity) affect the capture profile of the beds. Desorption is accomplished by heating the bed up to around 80°C coupled with vacuum. The product gas has purity range of 95-vol% to 100-vol% CO 2 . Major impurities are O 2 , N 2 , and H 2 O. The DAC system also produced water at molar ratio of 3.9 moles H 2 O per mole of CO 2 . Water production is affected by air humidity. Measurement-based process control increased the production to 3.4kg CO 2 per cycle with specific energy requirement of 10kWhkg -1 . The thermal energy requirement accounted for 76% of the total energy input during the improvement test. © 2019 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/117285
Appears in Collections: 气候变化与战略
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Recommended Citation:
Bajamundi C.J.E.,Koponen J.,Ruuskanen V.,et al. Capturing CO 2 from air: Technical performance and process control improvement[J]. Journal of CO2 Utilization,2019-01-01,30