A Novel Indirect Wollastonite Carbonation Route for CO2 Sequestration

✍ Scribed by J. Zhang; R. Zhang; H. Geerlings; J. Bi

• Book ID: 101831482
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 254 KB
• Volume: 33
• Category: Article
• ISSN: 0930-7516
• DOI: 10.1002/ceat.201000024

✦ Synopsis

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.