Premium
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.