ELUCIDATION OF HYDRODESULFURIZATION AND HYDROGENATION MECHANISMS USING RADIOISOTOPE TRACER METHODS

作     者：Atsushi ISHIHARA, Wei hua QIAN, Toshiaki KABE (Department of Chemical Engineering Faculty of Technology, Tokey University of Agriculture and Technology, 2 24 1 Nakacho, Koganei, Tokyo 184 8588, Japan) Atsushi ISHIHARA, Wei hua QIAN, Toshiaki KABE (Department of Chemical Engineering Faculty of Technology, Tokey University of Agriculture and Technology, 2 24 1 Nakacho, Koganei, Tokyo 184 8588, Japan)

作者机构：Tokey University of Agriculture and Technology 日本 184 8588 

出 版 物：《石油学报（石油加工）》 (Acta Petrolei Sinica(Petroleum Processing Section))

年 卷 期：2001年第17卷第1期

页      面：18-24页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 

主　　题：加氢脱硫 氢化作用 柴油机 催化转化 

摘      要：To meet the specification of sulfur and aromatic contents in diesel fuel, it is necessary for refiners to develop a new catalyst with high activity of hydrodesulfurization and hydrogenation. In the present study, the properties of noble metal catalysts for hydrodesulfurization and hydrogenation in the presence of sulfur compounds have been investigated. The hydrogenation activity of phenanthrene (PHE) on single noble metal and double noble metal catalysts—Pt/Al 2O 3, Pd/Al 2O 3 and Pd Pt/Al 2O 3 in the presence of dibenzothiophene (DBT) was perforrned in a fixed bed flow reactor. The Pt based catalysts revealed the similar HDS activities and higher HYD activity compared with convertional Mo based ca talysts . The maximum activity was obtained around 320 ℃ for both catalyst types. The Pt based catalysts produced perhydrophenanthrene as a major product at the maximum activity in the hydrogenation of PHE while the Mo based catalysts produced octahydrophenanthrene. A 35 S radioisotope pulse tracer method ( 35 S RPTM) was used to estimate the behavior of sulfur on the working catalysts and to clarity the differences between Pt and Mo based catalysts. Very little amount of labile sulfur was accumulated on the Pt and Pd catalysts in the HDS of [ 35 S]DBT (PtS 0.25 or PdS 0.25 ). This indicates that the mechanism of DBT HDS on noble metal catalysts is significantly different from that on conventional Mo based catalysts where Mo is present as MoS 2 less than 60% of which can be labile in the case of Co Mo/Al 2O 3. Another Ru Cs/Al 2O 3 catalysts were also prepared and the behavior of sulfur on the working catalyst was compared with those of Mo based catalysts and Pt and Pd catalysts. The values of labile sulfur in the HDS reaction for Ru Cs catalysts approximately correspond to RuS 0.5-0.74 . These amounts of labile sulfur are much higher than those for Pt and Pd catalysts. The result suggests that the oxidation state of Ru species is present between the oxidation states of