A Co/SiO2 catalyst is prepared and used in F-T reaction for thesynthesis of heavy hydrocarbons. The effects of various operation conditions including temper ature, pressure and space velocity on its performance are investigated and a tes t for the catalyst stability is carried out for 500 h. The experimental results show that the C5+ selectivity has only a little change on stream, but CO conversion gradually decreases. Thus the reaction temperature must be raised slow ly to maintain the catalyst activity. After H2 regeneration in situ, the a ctivity is approximately recovered to the original level. Hydrocarbon products are mainly composed of alkane and the content of alkene in C5+ hydrocarbons is about 2.25%. C12～C20 distillate range is superior in hydrocar bon products. The products in water phase contain 3.56%～6.56% of oxygenates w hich are mainly lower carbon number alcohols.%对近期筛选出的一种重质烃合成反应性能良好的Co/SiO2催化剂进行了500h的寿命试验,考察了在不同反应温度、压力和空速条件下催化剂的反应性能.结果表明,随着反应的进行,催化剂合成重质烃的选择性基本保持不变,但催化剂的活性缓慢下降;经原位再生后,催化剂活性可基本恢复到原来的水平.烃产物主要由烷烃组成,C5+中烯烃仅占2.25%,产物主要集中在C12～C20馏分段,水相产物中含3.56%～6.56%的有机含氧化合物,其中主要是低碳醇.
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