ABSTRACT
The calcium looping process, namely, calcination-carbonation cycles of calcium-based sorbent, is a promising method to capture carbon dioxide from coal-fired power plants and hydrogen production. It is believed that anthropogenic CO2 emission due to the combustion of fossil fuels has become a major contributor to global climate warming. Every year, lots of calcium-based industrial wastes such as carbide slag, white mud, and steel slag are produced. The chemical components of calcium-based industrial solid wastes compared with limestone are analyzed by x-ray fluorescence. Optimizing the reaction conditions for in situ CO2 capture represents a compromise between thermodynamic and kinetic limitations. The carbonation temperature has been shown to affect the cyclic CO2 capture capacity of the calcium-based sorbents. Increasing the carbonation temperature favors a higher reaction rate. The required calcination temperature for calcium-based sorbent depends on CO2 concentration in the calcination atmosphere.
