Development of a new waste cement recycling process by carbonation for flue gas desulphurization process

Atsushi Iizuka, Yasuro Katsuyama, Minoru Fujii, Akihiro Yamasaki, Yukio Yanagisawa

Research output: Contribution to conferencePaperpeer-review

Abstract

We propose a new cement recycling process via carbonic acid treatment. The dependencies of the extraction reaction rate on the ratio of waste cement to water, CO2 pressure, and the particle size of the raw waste cement particles were investigated experimentally with a laboratory-scale setup. Calcium carbonate with about 97 % purity was obtained in the precipitation process. A process simulation was conducted based on the experimental results, and energy consumption and the cost for a model process were estimated. The cost for the production of 1 metric-ton of CaCO3 for desulfurization of the 500 MW thermal power plant is estimated to be about 120 USD.

Original languageEnglish
Pages79-86
Number of pages8
Publication statusPublished - 2004 Dec 1
Externally publishedYes
Event2004 AIChE Annual Meeting - Austin, TX, United States
Duration: 2004 Nov 72004 Nov 12

Other

Other2004 AIChE Annual Meeting
Country/TerritoryUnited States
CityAustin, TX
Period04/11/704/11/12

ASJC Scopus subject areas

  • Engineering(all)

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