A Novel Indirect Wollastonite Carbonation Route for CO 2  Sequestration | Zendy

Zhang J. | Zendy; Zhang R. | Zendy; Geerlings H. | Zendy; Bi J. | Zendy

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A Novel Indirect Wollastonite Carbonation Route for CO 2 Sequestration

Author(s) -

Zhang J.,

Zhang R.,

Geerlings H.,

Bi J.

Publication year - 2010

Publication title -

chemical engineering and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.403

H-Index - 81

eISSN - 1521-4125

pISSN - 0930-7516

DOI - 10.1002/ceat.201000024

Subject(s) - wollastonite , carbonation , dissolution , hydrochloric acid , chemistry , chemical engineering , carbon sequestration , mineral , mineralogy , inorganic chemistry , carbon dioxide , organic chemistry , raw material , engineering

A new CO 2 sequestration approach through indirect wollastonite carbonation is proposed to mitigate anthropogenic CO 2 emissions from fossil fuel combustion. The wollastonite carbonation process includes three steps: (1) dissolution of wollastonite in hydrochloric acid to leach Ca 2+ from mineral matrix; (2) reaction of the resulting CaCl 2 solution with CO 2 in triisooctylamine (TIOA) at low temperature, producing CaCO 3 and an amino acid complex; (3) regeneration of the extractant and acid by backextraction through a temperature swing process and recycling to the dissolution and carbonation steps. It was found that the wollastonite dissolution rate was accelerated by hydrochloric acid and a maximum Ca 2+ dissolution extent of 95 % was obtained.

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