Effects of moisture on pyrolysis products distribution of Shendong coal

XU Ming; GAO Peng; MEN Zhuowu; WANG Xianghui; LI Chufu

doi:10.13226/j.issn.1006-6772.2017.01.010

Abstract：To investigate the effects of moisture of feed coal on the pyrolysis products distribution of Shendong coal,Gray-King and kilogram-scale pyrolysis with solid heat carrier experiments were conducted to investigate the products distribution under different moisture.The results of Gray-King experiments showed that moisture had significant influence on the ratio of coal tar and pyrolysis gas.The tar yield percent decreased from 9.98％ to 4.92％ as moisture decreased,while pyrolysis gas yield increased from 8.47％ to 11.07％ and pyrolysis water yield increased from 2.74％ to 5.94％.The results of kilogram-scale experimental equipment illustrated the similar tendency as the Gray-King experiments.As moisture decreased,the yield of tar decreased while the yield of pyrolysis gas increased.The pyrolysis tar yield of coal without drying treatment was 2.17％ higher than that of coal with drying treatment,while the pyrolysis gas yield was 1.58％ lower.The analysis results showed that the pyrolysis temperature had influence on the content of H2 and CO.The increasing moisture had benefit for the reduce of pyrolysis water and gas while yielding more tar.Therefore,the distribution of pyrolysis products could be adjusted by controlling the moisture of feed coal.