A KINETIC MODEL FOR SO2 CAPTURE OF A NOVEL T-T SORBENT FOR DRY FGD AT MODERATE TEMPERATURES
1. IntroductionThe dry flue gas desulphurization (FGD) technology at moderate temperatures (673-1073 K) using circulating fluidized bed (CFB) reactor has been developed in recent years 1. The key of this technology is the so-called T-T sorbent that is prepared by hydrating and drying a mixture of lime and fly ash. A high SO2 removal rate of over 95% at Ca/S ratio of 2 can be realized12. In order to characterize the T-T sorbent and optimize the FGD process in CFB reactors by numerical simulation, a kinetic model for SO2 capture of the sorbent is necessary. Eliminating the influence of the inter-grain gas diffusion generated by the sorbent in numerous layers is required to obtain the kinetic model.Some methods were used to avoid this gas diffusion, such as depositing a thin layer of Ca(OH)2, or introducing a small amount of Ca(OH)2 in the net sample-holder 3, or using a differential fixed-bed reactor45. The aim of this work is to try a new method to decrease the effect of the inter-grain gas diffusion and to develop a kinetic model of the T-T sorbent for dry FGD at moderate temperatures (673-1073K).
Yuran Li Lizhai Yang Changfu You Haiying Qi
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
183-184
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）