中国无烟煤焦气化活性的研究——水蒸气与二氧化碳气化活性的比较

Study on reactivity of Chinese anthracite chars gasification——Comparison of reactivity between steam and CO_2 gasification

在常压和920℃-1050℃下，采用热重方法，进行了六种中国典型无烟煤焦水蒸气与二氧化碳气化活性比较的研究。结果表明，无烟煤焦与水蒸气气化反应的活性与无烟煤的煤化程度相对应，无烟煤煤化程度越高，水蒸气气化反应活性越小。无烟煤焦与二氧化碳气化反应的活性与煤中矿物质的催化作用有密切关系，煤中矿物质的催化作用越大，二氧化碳气化反应活性越大。无烟煤焦与二氧化碳气化反应活性明显小于与水蒸气气化反应活性，后者比前者大10倍左右。初步探讨了无烟煤焦与水蒸气和二氧化碳的气化机理。

The gasification reactivity of six kinds of typical Chinese anthracite chars with steam and CO2 at 0.1 MPa and 920℃ - 1050℃was investigated comparatively using thermogravimetric analysis （TGA）. The results show that the gasification reactivity of anthracite chars with steam has a good correlation with the coal rank, i.e. the higher the coal rank, the lower the reactivity. The gasification reactivity of anthracite chars with CO2 is related to the catalytic effect of mineral matter in coal, i.e. the higher catalytic effect leads to higher gasification reactivity. The gasification reactivity of anthracite chars with steam is about 10 times higher than that of chars with CO2 Gasification mechanism has been discussed preliminarily.