中文版 | English
Title

Novel PEI@CSH adsorbents derived from coal fly ash enabling efficient and in-situ CO2 capture: The anti-urea mechanism of CSH support

Author
Corresponding AuthorYan,Feng; Zhang,Zuotai
Publication Years
2022-12-10
DOI
Source Title
ISSN
0959-6526
EISSN
1879-1786
Volume378
Abstract
Solid amine adsorption is considered to be the most promising technology for post-combustion CO capture, but it still has drawbacks due to the high cost of supports and the easy occurrence of CO-induced chemical deactivation. Herein, we propose a novel eco-friendly method for realizing efficient and stable solid amine adsorbents. A calcium silicate hydrate (CSH) support with a pore volume of 3.0 cm g is synthesized from coal fly ash (CFA) with the pore-expanded assistance of azeotropic distillation, and then the PEI@CSH adsorbents are prepared by impregnation. The adsorption capacity of the prepared 60%PEI@CSH-0.1 adsorbent reaches 198 mg g and exhibits an excellent cyclic stability, with an attenuation of only 1.9% after 10 cycles under ideal regeneration conditions. Even under realistic regeneration conditions, the CO uptake remains at 103 mg g after 10 cycles, which shows obvious advantages over that of commercial SiO supports. By using FT-IR, solid-state NMR and DFT calculations, we found that the CSH support promotes the conversion of primary amines to secondary amines in PEI molecules, and thus effectively inhibits the inactivation induced by the formation of urea compounds. Therefore, the PEI@CSH adsorbents provide a low-cost and high-efficiency approach for both in-situ CFA utilization and CO mitigation inside coal-fired power plants.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
Basic and Applied Basic Research Foundation of Guangdong Province[2021A1515010148];National Natural Science Foundation of China[22008104];National Natural Science Foundation of China[52225407];Shenzhen Graduate School, Peking University[JCYJ20200109141642225];Shenzhen Graduate School, Peking University[JSGG20210713091810035];Shenzhen Graduate School, Peking University[RCBS20210609104422047];
WOS Research Area
Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
WOS Subject
Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
WOS Accession No
WOS:000874806400005
Publisher
Scopus EID
2-s2.0-85140136996
Data Source
Scopus
Citation statistics
Cited Times [WOS]:5
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/406883
DepartmentSchool of Environmental Science and Engineering
Affiliation
1.School of Environmental Science and Engineering,Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,Southern University of Science and Technology,Shenzhen,518055,China
2.Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen City,Shenzhen,518055,China
First Author AffilicationSchool of Environmental Science and Engineering
Corresponding Author AffilicationSchool of Environmental Science and Engineering
First Author's First AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Qu,Fan,Yan,Feng,Shen,Xuehua,et al. Novel PEI@CSH adsorbents derived from coal fly ash enabling efficient and in-situ CO2 capture: The anti-urea mechanism of CSH support[J]. Journal of Cleaner Production,2022,378.
APA
Qu,Fan.,Yan,Feng.,Shen,Xuehua.,Li,Chunyan.,Chen,Heijin.,...&Zhang,Zuotai.(2022).Novel PEI@CSH adsorbents derived from coal fly ash enabling efficient and in-situ CO2 capture: The anti-urea mechanism of CSH support.Journal of Cleaner Production,378.
MLA
Qu,Fan,et al."Novel PEI@CSH adsorbents derived from coal fly ash enabling efficient and in-situ CO2 capture: The anti-urea mechanism of CSH support".Journal of Cleaner Production 378(2022).
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