加氢尾油在改性HZSM-5催化剂上的非临氢降凝

以加氢裂化尾油为原料，锡、锌和磷改性的HZSM-5分子筛为降凝催化剂，在常压、非临氢条件下，考察了反应温度、空速对降凝效果的影响。实验结果表明，磷改性的HZSM-5型非临氢降凝催化剂有较高的液体产品收率。降凝的最佳反应条件为，反应温度390℃，空速1.7h^-1（W），液体产品收率达96％，加氢尾油凝点降低最高幅度达54℃。再生后的催化剂的降凝效果基本保持不变，磷改性的HZSM-5型非临氢降凝催化剂具有良好的应用前景。

Non-Hydrogen-Pour Point Depression of Hydrogenation Tail Oil on the Modified HZSM-5 Catalyst

The effects of reaction temperature and space velocity on the pour point depression were investigated at normal pressure without hydrogen with using hydrocracking tail oil as raw material, and HZSM -5 molecular sieve as the pour point depression catalyst which was modified with tin, zinc and phosphorus. The result show that the liquid yield of phosphorus modified HZSM-5 is higher than others. The optimum conditions for non-hydrogen-pour point depression are as follows： the reaction temperature is 390℃, reaction space velocity is 1.7h^-1（w）. Under these conditions, the liquid yield reaches more than 96%, and the pour point of hydrocracking tail oil reduced 54℃. The pour point depression effect of catalyst remains the same after regeneration. The phosphorus modified HZSM - 5 non - hydrogen - pour point depression catalyst has a good application foreground.