Patent ID: 8114808

Claim:
A sorbent for the capture of carbon dioxide (CO 2 ) from gas comprising CO 2 , the sorbent comprising calcium oxide (CaO) and at least one refractory dopant having a Tammann temperature greater than about 530° C., wherein the sorbent has a metal to calcium atomic ratio of about 1:1, about 1:5, about 1:10, about 3:10, about 1:20, or about 1:50, wherein the refractory dopant comprises a metal selected from the group consisting of silicon, titanium, chromium, cobalt, cerium, zirconium, and mixtures thereof, and wherein the refractory dopant enhances resistance to sintering, thereby conserving a nanostructure of the sorbent at temperatures of at least about 530° C.