Effects of Steam Addition on the Properties of High Temperature Ceramic CO2 Acceptors

摘要

The effects of steam addition on the stability and CO2 capture and regeneration properties of Li2ZrO3, K-doped Li2ZrO3,nNa2ZrO3, and Li4SiO4 at relevant sorption enhanced steam methane reforming conditions has been investigated. It has been observed thatnthe presence of water in the form of steam enhances the capture and regeneration rates. However, a large decay in the capacity is observednwhen compared to the performance of the acceptors in dry conditions. The reasons for the improved kinetics are not clear, but a highernmobility of the alkaline ions is suggested. The losses in capacity could be due to sintering under high pressure of steam, vaporization ofnalkali metals, and/or phase segregation.