金属化合物对煤岩显微组分所制活性炭吸附性能的影响

Effect of metal oxides on the adsorption properties of activated carbons prepared from macerals

研究了Ni2O3、Fe2O3 等金属化合物对太西无烟煤和大同烟煤分离富集镜质组、丝质组所制活性炭吸附性能的影响。研究结果表明:金属化合物能显著加快太西无烟煤显微组份的活化反应速度,部分金属化合物可以提高太西无烟煤显微组分所制活性炭的吸附性能,但对大同烟煤显微组分所制活性炭的性能影响不大,其因在于大同烟煤的反应性高于太西无烟煤。加入金属化合物提高无烟煤显微组份活化反应速度的主要原由是金属化合物对碳与水蒸气活化反应有一定的催化作用,使活化活性点增加,进而提高了活化反应效率;而能否提高活性炭的吸附性能则与金属化合物和煤岩显微组分的性质有关。

The effect of metal oxides ( Ni2O3, Fe2O4 etc.) on the porous structure and adsorption capacity of activated carbons from Taixi anthracite and Datong bituminous macerals has been investigated. Results indicate that the rate of the water activation reaction of macerals separated from Taixi anthracite was enhanced by adding metal oxides. Some of metal oxides can improve the adsorption properties of activated carbons prepared from macerals separated from Taixi anthracite. Metal oxides have little effect oil the adsorption properties of activated carbons from macerals separated from Datong bituminous coal, because the reactivity of Datong bituminous coal is higher than that of Taixi anthracite. The mechanism of enhanced aactivation reaction rate is title to it catalytic reaction, which may be ascribed to the increase of the active sites produced by metal oxides. The adsorption properties of the resultant activated carbons are mainly dependent off the properties of the metal oxides and macerals.