Co/SiO2催化剂合成重质烃的反应性能

 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．

Performance of Co/SiO2 Catalyst for the Synthesis of Heavy Hydrocarbons in F-T Reaction

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.