摘要
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 synthesised Al2O3/USL-supported NiW-P catalysts were prepared by the incipient-wetness co-impregnation method or the incipient-wetness serial impregnation method with ammonium meta- tungstate, nickel nitrate and different phosphorus sources including phosphoric acid and diammonium phosphate. The physieochemical properties of the catalysts were characterized by means of XRD, NH3- TPD, H2-TPR, UV-Vis DRS, Roman and nitrogen adsorption-desorption isotherm. Catalytic performances of the catalysts were tested in a high pressure fixed bed microreactor with high sulfurous and nitrous FCC diesel as feed. The evaluation results showed that the activities of hydrodesulfurization and hydrodenitrogenation were obviously enhanced, and sulfur and nitrogen contents in the products were both below 20 μg · g^-1 over γ-A12O3/USL supported-NiW catalyst modified by appropriate content of phosphoric acid.
出处
《工业催化》
CAS
2010年第10期42-49,共8页
Industrial Catalysis
基金
国家自然科学基金项目(20876173
20773163
20833011)
2009年度教育部科学技术研究重点项目(31)
中国石油科技管理部项目(2008A-3801)
