Carbon dioxide sequestration involving two-salt-based thermolytic processes

摘要

The present invention relates to an energy efficient carbon dioxide sequestration processes whereby Group 2 silicate minerals and CO2 are converted into limestone and sand using a two-salt thermolytic process that allows for the cycling of heat and chemicals from one step to another.

主权项

1. A method of sequestering carbon dioxide produced by a source, comprising:
(a) heating a first halide or hydrate thereof with water to form a first hydroxide, oxide and/or hydroxychloride and HCl, and removing the HCl; (b) admixing some or all of the first hydroxide, oxide, and/or hydroxychloride with a second halide or hydrate thereof and carbon dioxide to form a first halide or hydrate thereof, a carbonate salt, and water; and (c) separating some or all of the carbonate salt from step b, whereby the carbon dioxide is sequestered into a mineral product form.