工艺条件对费-托蜡加氢裂化催化剂反应性能的影响

采用等体积浸渍法，制备了以USY-Al2O3为载体、Ni-W为金属组分的加氢裂化催化剂，并用X-射线衍射、吡啶吸附红外漫反射光谱、低温N2吸附-脱附等对催化剂进行表征。利用单因素变量法，分别考察了温度、空速、氢油比以及压力等工艺条件对费-托合成蜡加氢裂化反应性能的影响。结果表明，工艺条件对催化剂反应性能的影响强度由大到小的顺序为：温度＞空速＞氢油比＞压力，在温度340 ℃、质量空速1.5 h-1、氢油体积比1 000、压力4 MPa的条件下，转化效果最佳，重质蜡转化率高达98.11%，轻质燃料油选择性为92.77%，裂解气选择性仅为7.23%。

EFFECT OF PROCESS CONDITIONS ON PERFORMANCE OF FISCHER-TROPSCH WAX HYDROCRACKING CATALYST

The hydrocracking catalysts were prepared by loading Ni-W onto USY-Al2O3 carrier through incipience wetness impregnation method and characterized by X-ray diffraction，infrared diffuse reflectance Pyridine adsorption and low temperature nitrogen adsorption desorption techniques. The effects of temperature, space velocity, hydrogen-oil ratio, and pressure on the hydrocracking performance of Fischer-Tropsch waxes were investigated by the single-factor variable method. The results showed that the influence of operating conditions changes as orders: temperature> space velocity> hydrogen oil volume ratio> pressure. At the optimized conditions of 340°C, 4 MPa, Sv 1.5h-1, hydrogen to oil ratio 1 000(v), the conversion is the best. The conversion rate of heavy wax oil is as high as 98.11%, light oil yield reaches 93.5%, and the yield of cracked gas is only 6.5%.