Understanding the Sulfation Pattern of CaO-Based Sorbents in a Novel Process for Sequential CO2 and SO2 Capture

• DOI: 10.1021/acs.iecr.6b02827
• Publication Date: 2016-09-14T20:08:33Z
• Authors: Donglin He; Yan Shao; Changlei Qin; Ge Pu; Jingyu Ran; Li Zhang
• Keywords: Calcium looping; Degradation

The CaO-based sorbent is considered to be a potential candidate for high-temperature CO2 capture. However, its application limited by the loss in sorption activity with increasing number of calcium looping (CaL) cycles, which leads vast spent sorbents pollution. To solve problem, optimized utilization through novel process achieve sequential capture and SO2 retention studied work, sulfation pattern CaO coming from CaL under different variables investigated. It observed that experiencing dozens carbonation/calcination cycles severe conditions have even better capacity than fresh CaO. By use combination testing approaches, phenomenon revealed related variation CaL-spent CaO, pores diameter approximately 60–100 nm material are thought key factor determining retention. On basis results, model proposed understand reaction behavior highly cycled capturing. Moreover, it found mode sensitive calcination particle size sorbents.