Synthesis of dry sorbents for carbon dioxide capture using coal fly ash and its performance

Jaehee Lee, Sang-Jun Han and Jung-Ho Wee

Applied Energy, 2014, vol. 131, issue C, 40-47

Abstract: The present paper investigates the application of raw coal fly ash (FA) to dry-based CO2 fixation. Dry sorbents are manufactured by mixing FA, NaOH, CaO and a small amount of water and their absorption behavior, performance, regeneration and leaching efficiency are analyzed. The CO2 absorption efficiency (AE) of FA-added sorbent (WNCF) is higher than that of FA-free sorbents (WNC) and its absorption behavior is improved. In addition, CO2 desorption from carbonated WNCF (CWNCF) occurs at 100°C lower than that from carbonated WNC (CWNC) and its desorption efficiency is 16.5% point higher than that of CWNC, due to the FA addition to the sorbent. However, the AE of regenerated CWNCF is substantially lower than that of fresh WNCF, which indicates that CWNCF cannot easily be regenerated by simple desorption increasing temperature. This is ascribed to the effect of the added FA and water in contributing to the production of Ca- and Na-based carbonated materials that cannot readily be regenerated during the carbonation. Some of the inherent K and Ca components present in the raw FA participate in the carbonation of WNCF, and Cr is co-precipitated during WNCF carbonation to become a stabilized material.

Keywords: Dry sorbents; Coal fly ash; Carbon dioxide capture and storage; Coal fired power plant; Carbonation (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261914005832
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:appene:v:131:y:2014:i:c:p:40-47

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2014.06.009

Access Statistics for this article

Applied Energy is currently edited by J. Yan

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