α-TETRADECENE COFEEDIG EFFECT ON THE SUPERCRITICAL-PHASE FISCHER-TROPSCH SYNTHESIS OVER Co/SiO_2 CATALYSTS

以Ｃｏ／ＳｉＯ２为催化剂在固定床反应器中进行了超临界ＦｉｓｈｅｒＴｒｏｐｓｃｈ合成，同时考察了αＣ１４烯共进料对该反应的影响。结果表明，所添加的αＣ１４烯可以借助超临界流体到达催化剂的表面参与链增长过程，但不同于原始的链传递。还发现，Ｃ１４烯的加入可以明显提高Ｃ１４烃的得率，而Ｃ１Ｃ１３烃的选择性则相应降低，使得产物烃的分布偏离ＡＳＦ动力学。另一方面，从产物蜡的分析结果可以看出，蜡的平均分子量和饱和度都在增加，其中含氧化合物的含量随着Ｃ１４烯的加入而减少。

|? TETRADECENE COFEEDIG EFFECT ON THE SUPERCRITICAL PHASE FISCHER TROPSCH SYNTHESIS OVER Co/SiO2 CATALYSTS

Supercritical phase Fischer Tropsch synthesis cofeed with 1-tetradecene over Co/SiO2 catalysts has been carried out on a fixed bed reactor system. It was found that the added 1-tetradecene could reach the surface of catalyst by the aid of supercritical fluid, and participated in the chain growth process there, which was indistinguishable from the original chain propagation. Consequently, the yield of hydrocarbons larger than C14 increased significantly, while the selectivity to C1-C13 decreased correspondingly, which made the carbon number distribution deviate from ASF kinetics drastically.