Techno-economic analysis of geopolymer production from the coal fly ash with high iron oxide and calcium oxide contents

You, S. , Ho, S. W., Li, T., Maneerung, T. and Wang, C.-H. (2019) Techno-economic analysis of geopolymer production from the coal fly ash with high iron oxide and calcium oxide contents. Journal of Hazardous Materials, 361, pp. 237-244. (doi:10.1016/j.jhazmat.2018.08.089) (PMID:30199823)

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Abstract

In this work, we firstly examined the technical feasibility of geopolymer synthesis from the coal fly ash with high iron oxide (48.84 wt.%) and calcium oxide (22.15 wt.%) contents. The heat resistance of geopolymer was represented by the dry weight loss which ranged from 2.5 to 4.9% and was better than that (11.7%) of OPC. However, the high iron oxide content made the acid resistance (13–14%) of geopolymer inferior to OPC. The economics of geopolymer production changes significantly upon the variation in the arrangement of material use and geopolymer price. The costs of Na2SiO3 and NaOH and the benefit of geopolymer selling were the major factors affecting the economic feasibility of geopolymer production. When the Na2SiO3 price was around 400 USD/ton, the geopolymer production will be profitable even if the geopolymer price was as low as 50 USD/ton. It is possible to improve the economics of geopolymer production by varying the arrangement of material use while not impairing the performance of geopolymer.

Item Type:Articles
Additional Information:This research program is funded by the National Research Foundation (NRF), Prime Minister’s Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) program. Grant Number R-706-001-101-281, National University of Singapore.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:You, Dr Siming
Authors: You, S., Ho, S. W., Li, T., Maneerung, T., and Wang, C.-H.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Hazardous Materials
Publisher:Elsevier
ISSN:0304-3894
ISSN (Online):1873-3336
Published Online:29 August 2018
Copyright Holders:Copyright © 2018 Elsevier B.V.
First Published:First published in Journal of Hazardous Materials 361:237-244
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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