摘要
以60％水蒸气和40％N2作为气化剂，采用热重方法，在850℃～950℃条件下，研究了澳大利亚高盐煤、水洗煤以及不同浓度酸洗后的煤在所制得的快速低温热解焦的水蒸气气化反应特性．同时，用N2作为吸附剂测定了几种煤焦的比表面积．结果表明：水洗煤焦和0．01mol／LHCl洗煤焦气化反应活性最高，原煤焦次之，0．1mol／LHCl洗煤焦和0．5mol／LHCl洗煤焦的活性较低．洗涤过程会导致煤焦孔径的扩大，煤焦的比表面积减小．原煤焦的活化能较高，而洗涤煤焦的活化能降低．
The gasification characteristics of rapid pyrolysis chars derived from raw Australian lignite and washed lignite by H2O and HCl was investigated with 60% steam and 40% N2 in a thermal balance at 850 ℃-950℃ and atmospheric pressure. At the same time, the specific surface area of coal or chars was determined by N2 absorption. The results show that the H2O washed-char and HCl （0. 01 mol/L） washed-char show higher gasification reactivity than that of raw coal char. The HCl （0. 1 mol/L） washed-char and HCl （0. 5 tool/L）washed-char have lower reactivity. Washing process may result in the enlargement of average pore diameter of chars and the decrease of specific surface area. The gasification activity energy of raw coal char is higher, while the gasification activity energy of the washed coal chars is lower.
出处
《煤炭转化》
CAS
CSCD
北大核心
2008年第3期10-13,共4页
Coal Conversion
基金
国家重点基础研究发展规划(973)项目(2005CB221200)
国家高技术研究发展计划(863)项目(2007AA050302)
关键词
高钠煤
水蒸气
气化
higher-sodium coal, steam, gasification
