US 9,539,541 B2 · Mixed salt CO2 sorbent, process for making and uses thereof

Abstract

The invention relates to a mixed salt composition which is useful as a CO2 sorbent. The mixed salt composition comprises a Mg salt, and at least one Group IA element salt, where the Mg and Group IA element are present at a molar ratio of from 3:1 to 8:1. The resulting composition can adsorb about 20% or more of CO2 in a gas. Via varying the molar ratios of the components, and the Group IA element, one can develop compositions which show optional functionality at different conditions. The composition is especially useful in the adsorptive capture of CO2 on mobile sources, such as transportation vehicles, where it can be recovered during regeneration of the adsorbent composition and the CO2 used as a coolant gas, as a reactant in manufacture of fuel, and so forth.

Claims17

Dependent claims

A method for removing CO2 from a gas or gas mixture produced by combustion of hydrocarbon fuel by an internal combustion engine on a mobile source comprising contacting a mixed salt composition which consists of:

(i) MgCO3, (ii) at least one carbonate salt of Na, Li, K, or Rb, and (iii) at least one nitrate salt of Na, Li, K, or Rb, wherein the Mg of (i) and the Na, Li, K, or Rb of (ii) and (iii) are present in a molar ratio of from about 6:1 to about 4:1, with said gas or gas mixture produced by said internal combustion engine at a temperature of from about 100° C. to about 450° C. for a time sufficient for said mixed salt composition to remove a portion of CO2 therefrom and releasing adsorbed CO2 to regenerate said composition by heat exchange with hot exhaust gas discharged from said internal combustion engine.

Dependencies are inferred from the claim text.

Mixed salt CO2 sorbent, process for making and uses thereof

Life of this patent

Mixed salt CO2 sorbent, process for making and uses thereof

Life of this patent

Abstract

Claims17