石炭の接触ガス化における触媒活性序列

炭種, ガス化剤の影響

抄録

Ten coals ranging from anthracite coal to brown coal were impregnated with four catalysts (K, Ba, Fe, Ni) during pulverization. Three different gases, that is, H₂O, CO₂ and H₂ were used to determine the effect of gasifying agent on the activity sequence of catalysts. The gasification was carried out in a thermobalance. The reaction profile (the variation of specific rate with fixed-carbon conversion) strongly depended on catalyst type and reaction atmosphere, but was almost independent of coal type. The activity sequence of catalysts was also independent of coal type, and the sequences obtained were as follows
H₂O gasification: K>Ba>Ni>Fe
CO₂ gasification: K>Ba>Fe>Ni
H₂ gasification: Ni≥Fe>K>Ba