Ni/ZnO-Al_2O_3催化剂脱除含酚油中的硫

REMOVAL OF SULFUR FROM PHENOL OIL USING Ni/ZnO-Al_2O_3 CATALYST

采用等体积浸渍法制备了Ni/ZnO-Al_2O_3催化剂,以含酚油为原料,通过固定床实验筛选出了最优的脱硫催化剂,并评价了其对含酚油脱硫不脱酚的最佳工艺条件.结果表明,ZnO粒径越小,其制备出的脱硫催化剂脱硫活性越高;较高的反应温度和较低的体积空速有利于提高Ni/ZnO-Al_2O_3对含酚油的脱硫效果.Ni/ZnO-Al_2O_3脱硫剂脱硫不脱酚的适宜操作条件为：常压,温度320℃-340℃,空速0.2h-1,此时Ni/ZnO-Al_2O_3催化剂的脱硫率达99.1%,且可稳定运行200多小时.该催化剂在常压临氢条件下,可以实现对含酚油脱硫且不脱酚,不仅解决了工艺难题,也大大节约了生产成本.

Ni/ZnO-Al_2O_3 catalyst was prepared by isoehoric impregnation.The optimal desulfurization catalyst was selected to remove sulfur compounds from phenol oil in the fixed-bed unit and the optimal technological condition of desulfurization and undephenolization was investigated.The results showed that the smaller of the particle size of ZnO,the desulfurization activity of the prepared desulfurization catalyst is higher.The higher reaction temperature and the smaller LHSV can improve the better desulfurization activity of Ni/ZnO-Al_2O_3.The optimal operating conditions in desulfurization and undepheno-lization of phenol oil by using Ni/ZnO-Al_2O_3 as desulfurizer included atmospheric pressure,the reaction temperature of 320℃-340℃,the LHSV of 0.2h-1,under which the desulfurization rate would be 99.1%and the catalyst would be stable operation of more than 200 h.The Ni/ZnO-Al_2O_3 catalyst can realize desulphur and undephenolize from phenol oil under hydrogen at atmospheric conditions,which not only solved the technological difficulty,but also greatly saves the production cost.