论文部分内容阅读
以原位合成的USL/γ-Al_2O_3为复合载体,以磷酸为磷源,采用等体积共浸渍法与镍和钨活性组分共浸渍;或以磷酸氢二铵为磷源,采用等体积分步浸渍法或共浸渍法与镍和钨制备成相应催化剂。磷改性系列催化剂采用XRD、NH_3-TPD、H_2-TPR、UV-Vis DRS、拉曼以及N_2吸附-脱附等技术进行表征。以硫和氮含量均较高的FCC柴油为原料,在高压加氢微反装置中进行催化剂加氢脱硫和加氢脱氮活性评价。结果表明,催化剂经适量的磷酸改性后,加氢脱硫率和加氢脱氮率明显提高,产品中的硫和氮含量均小于20μg·g~(-1)。
In situ synthesis of USL / γ-Al 2 O 3 as a composite carrier, phosphoric acid as a phosphorous source, co-impregnation with an equal volume of co-impregnation with nickel and tungsten active components; or diammonium phosphate as a phosphorous source, Step impregnation method or co-impregnation method with nickel and tungsten preparation of the corresponding catalyst. The catalysts for phosphorus modification were characterized by XRD, NH_3-TPD, H_2-TPR, UV-Vis DRS, Raman and N_2 adsorption-desorption techniques. FCC diesel with high content of sulfur and nitrogen was used as raw material to evaluate the activity of hydrodesulfurization and hydrodenitrogenation of catalysts in high pressure hydrogenation micro-reactor. The results showed that the hydrodesulfurization rate and hydrodenitrogenation rate of the catalyst increased obviously with the proper phosphoric acid modification. The content of sulfur and nitrogen in the product was less than 20μg · g -1.