【摘要】 <正> CO甲烷化是降低城市煤气中CO含量和增加热值的较好方法之一。镍、钌等过渡金属催化剂的硫中毒问题很难解决,因而近些年来对能抗硫中毒的钼基催化剂有了些研究,尽管这类催化剂在常压下的活性并不高。本文测定了不同硫化条件下MoO₃/γ-Al₂O₃催化剂的活性及硫钼原子比,並对催化剂甲烷化活性规律作了研究。更多还原

【Abstract】 The activity of a sulfided MoO₃/γ-Al₂O₃ catalyst for methanation at different degree of sulphuration and under different reaction conditions was investigated. For a sample containing 16.7w% Mo, S/Mo atomic ratio of the sample reached a stable value after sulphuration for 2h. at 400℃, whiie the optimun activity was abtained only after more than 6h. of sulphidration. The effect of reaction temperature on catalyst activity was measured and the apparent activation energy of methanation reaction was calculated to be 37.4kJ/mol. The rate of methane formation did not change significantly at different space velocities but increased with increasing hydrogen content in the reactant gas.更多还原