CO2 and SO2 capture capability of two Greek limestones

Abstract

Carbon dioxide has been identified as the major greenhouse gas contributing to global climate change. As a result, various processes are being explored that would allow CO2 to be captured and ultimately sequestered from processes, such as combustion, gasification, and steam methane reforming, where carbon dioxide is a major by-product. Use of amine solvents for CO2 capture, while common in industry, is expensive and unlikely to be feasible on a large scale. Looping cycles involving calcium sorbents, where CO2 is released at high temperature by calcinations and captured at lower temperature by carbonation, are of particular interest. However, evidence has shown that the ability of the sorbents to maintain their utilization over repeated cycles is quite limited.