气候变化领域集成服务门户(CCPortal): Ambient and sub-ambient temperature direct air CO2 capture (DAC) by novel supported in situ polymerized amines

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DOI	10.1039/d3ta07909k
	Ambient and sub-ambient temperature direct air CO2 capture (DAC) by novel supported in situ polymerized amines
	Al-Absi, Akram A.; Benneker, Anne M.; Mahinpey, Nader
发表日期	2024
ISSN	2050-7488
EISSN	2050-7496
起始页码	12
结束页码	17
卷号	12 期号:17
英文摘要	With the dramatic increase in CO2 emissions over the last few decades and the subsequent increase in global temperatures leading to climate change, substantial efforts have been directed towards the development of materials designed for the direct capture of CO2 from the atmosphere, a process known as direct air capture (DAC). DAC stands out as one of the primary negative emission technologies (NETs) expected to play a pivotal role in achieving negative CO2 emissions. However, most of the reported sorbent performances have been focused on ambient temperatures (around 25 degrees C) or higher, specifically under dry conditions, with very few exceptions. This limitation has posed a significant obstacle to the widespread deployment of DAC, as a substantial portion of the world experiences sub-ambient temperatures and non-zero humidity levels. In this study, we evaluate the in situ cationic ring-opening polymerization of three different 2-oxazolines monomers initiated by CPTMS or IPTMS, which are chemically tethered to mesoporous silica foam (MSF) and large-pore alumina-silica (LPAlSi) supports, and their performance for CO2 capture under various conditions. Among all combinations of supports, initiators, and monomers, the MSF-C-EtOX sorbent demonstrated exceptional utilization of the support, initiator, and monomer properties, resulting in superior CO2 uptakes under various conditions. The optimum adsorption temperature under dry conditions was found to be 40 degrees C, achieving a CO2 uptake of 1.72 mmol g(-1). Further testing under sub-ambient dry adsorption conditions at -20 degrees C showed a CO2 capacity of 0.80 mmol g(-1). The introduction of moisture significantly enhanced CO2 uptakes, reaching 2.45 mmol g(-1) at 20 degrees C. Under humid conditions, the sorbent exhibited robust performance at low temperatures, with CO2 uptakes of 1.88 and 1.40 mmol g(-1) at 0 degrees C and -20 degrees C, respectively. Importantly, the sorbent demonstrated stable cycling capacity over 50 and 10 cycles under dry and humid conditions, respectively. The findings presented in this study suggest that supported in situ polymerized amines are promising materials for DAC under ambient-temperature and low-temperature conditions. There are additional prospects for fine-tuning these materials to facilitate the large-scale implementation of DAC facilities under diverse environmental conditions.
语种	英语
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:001196226700001
来源期刊	JOURNAL OF MATERIALS CHEMISTRY A
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305700
作者单位	University of Calgary
推荐引用方式 GB/T 7714	Al-Absi, Akram A.,Benneker, Anne M.,Mahinpey, Nader. Ambient and sub-ambient temperature direct air CO2 capture (DAC) by novel supported in situ polymerized amines[J],2024,12(17).
APA	Al-Absi, Akram A.,Benneker, Anne M.,&Mahinpey, Nader.(2024).Ambient and sub-ambient temperature direct air CO2 capture (DAC) by novel supported in situ polymerized amines.JOURNAL OF MATERIALS CHEMISTRY A,12(17).
MLA	Al-Absi, Akram A.,et al."Ambient and sub-ambient temperature direct air CO2 capture (DAC) by novel supported in situ polymerized amines".JOURNAL OF MATERIALS CHEMISTRY A 12.17(2024).