CO2 capture on aminosilane functionalized alumina-extracted residue of catalytic gasification coal ash

Xiangyu Li, Zhiqing Wang, Ru Feng, Jiejie Huang and Yitian Fang

Energy, 2021, vol. 221, issue C

Abstract: The technology of alumina-extraction from coal ash provides an effective way for re-utilization of coal based solid waste as resource. However, one of the most serious challenges that this technology face is the harmless treatment of alumina-extracted residue (AR). Considering the structure and properties of AR, a scheme was proposed to make the AR as a potential sorbent for CO2, and in order to achieve enhanced CO2 adsorption performance, the AR was functionalized with (3-aminopropyl) triethoxysilane (APTES). Moreover, the effects of amine grafting amount and temperature on CO2 adsorption capacity of sorbents were investigated. The results show that at 25 °C and 100% CO2, the sample obtained by adding 12 mmol of APTES presented the maximum CO2 adsorption capacity of 1.23 mmol/g. The sorbent can be regenerated successfully at 110 °C and maintain a stable uptake in 5 repeated adsorption–desorption cycles. These results suggested that APTES functionalized alumina-extracted residue is a potential excellent sorbent for CO2 absorption.

Keywords: CO2 capture; Catalytic gasification ash; APTES; Chemiadsorption (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544220327493
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:221:y:2021:i:c:s0360544220327493

DOI: 10.1016/j.energy.2020.119642

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().