文献类型：期刊文献

英文题名：Experimental study on K migration, ash fouling/slagging behaviors and CO2 emission during co-combustion of rice straw and coal gangue

作者：Liu, Lang Ren, Shan Yang, Jian Jiang, Donghai Guo, Junjiang Pu, Yubao Meng, Xianpiao

第一作者：刘浪;Liu, Lang

机构：[1] Chemical Engineering Institute, Guizhou Institute of Technology, Guizhou, Guiyang, 550003, China; [2] College of Material Science & Engineering, Chongqing University, Shapingba, Chongqing, 400044, China; [3] Guizhou Provincial Key Laboratory of Energy Chemistry, Guizhou, Guiyang, 550003, China

第一机构：贵州理工学院化学工程学院

年份：2022

卷号：251

外文期刊名：Energy

收录：EI(收录号：20221611976647);Scopus(收录号：2-s2.0-85128205105)

语种：英文

外文关键词：Chlorine compounds - Coal deposits - Blending - Coal - Quartz - Coal combustion - Potassium hydroxide

摘要：Co-combustion of biomass and coal gangue (CG) is a potential technique for using both resources. The alkali migration plays a key factor for reducing ash slagging and SO2 emission, but its mechanism unclear. Hence, the K migration in co-combustion of rice straw (RS) and CG was well studied in this work. The results indicated that the influence of CG addition on K migration is related to the CG blending ratio. For a CG blending ratio 2 reacted with KCl and KOH to form relatively stable K2SO4; On the other hand, KCl, KOH and K2SO4 interacted with mullite and quartz to form KAlSi3O8. For a CG blending ratio >40%, K mainly reacted with mullite and quartz to form KAlSi3O8. Therefore, co-combustion is expected to reduce SO2 emissions by up to 18.19% at a CG blending ratio of 30%. Furthermore, the ash fouling/slagging tendency decreased from 0.62 without CG to 0.26–0.47 with CG. Considering these reasons, we suggested a 20%–30% CG blending ratio as the optimum feedstock composition for the co-combustion of RS and CG, and the co-combustion could consume 0.17–0.23 kg/(kW·h) of CG and reduce 0.45–0.43 kg-CO2/(kW·h). ? 2022 Elsevier Ltd