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

通信作者：Liu, L[1];Ren, S[2]

机构：[1]Chem Engn Inst, Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China;[2]Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China;[3]Guizhou Prov Key Lab Energy Chem, Guiyang 550003, Guizhou, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Chem Engn Inst, Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China;corresponding author), Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China.|贵州理工学院;

年份：2022

卷号：251

外文期刊名：ENERGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000798562800005)】；

基金：Acknowledgements We gratefully acknowledged the National Natural Science Foundation of China (52164033) , and the Science and Technology Project of Guizhou Province (Qiankehezhicheng [2022] yiban032) for financial support.

语种：英文

外文关键词：Co -combustion; Biomass; Alkali metals; Ash characteristics; Coal gangue

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 <40%, one hand the released SO2 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, cocombustion 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 center dot h) of CG and reduce 0.45-0.43 kg-CO2/(kW center dot h).