研究了Ru和Cu助剂对无K的费托(F-T)合成Fe基催化剂的织构性质、物相结构、还原和碳化行为的影响.在n(H2)/n(CO)=2.0,t=260℃,P=1.5MPa和GHSV=2000h-1的条件下,采用固定床反应器考察了Ru,Cu助剂对Fe基催化剂费托合成反应性能的影响.采用低温N2物理吸附、X射线衍射、穆斯堡尔谱和程序升温还原技术对催化剂进行了详细表征.结果发现,Ru或Cu的添加均提高了铁氧化物的分散度,不同程度地促进了催化剂的还原和碳化,Cu的作用更为显著.反应结果表明,Ru或Cu的添加均提高了催化剂上F-T合成反应活性,其中Cu的添加降低了CH4选择性,促进了C5+的生成;而Ru的作用则相反.
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