Kinetics of hydrodesulfurization of benzothiophene catalyzed by sulfided Co$z.sbnd;Mo/Al2O3

Hydrogenolysis and hydrogenation of dibenzothiophene catalyzed by sulfided CoO‐MoO3/γ‐Al2O3: The reaction kinetics

“…The literature concerning kinetics of hydrogenolysis reactions in hydrodesulfurization of thiophenic compounds catalyzed by Co-Mo/y-A120:, is generally consistent with t h e results presented here for dibenzothiophene, Much of the work has been done with thiophene (Satterfield and Roberts, 1968;Lee and Butt, 1977;Phillipson, 1971;Morooka and Hamrin, 1977) and benzothiophene (Kilanowski and Gates, 1980) at pressures near atmospheric and for narrow ranges of H2 partial pressure.…”

“…The literature supports the proposal of two different kinds of sites for hydrogenation and C-S bond hydrogenolysis. The evidence is provided by the results of poisoning (Lee and Butt, 1977;Desikan and Amberg, 1964;Urimoto and Sakikawa, 1972) and kinetics (Satterfield and Roberts, 1968;Lee and Butt, 1977;Bhinde, 1979;Kilanowski and Gates, 1980) studies, among others. One kind of site is strongly poisoned by bases such as pyridine and quinoline, and the other is less acidic and less sensitive to such poisons.…”

Possible precursors and products of deep hydrodesulfurization of gasoline and distillate fuels III. The thermodynamic properties of 1,2,3,4-tetrahydrodibenzothiophene

“…The group-contribution method values, T c ¼ 857 K, p c ¼ 3450 kPa, and q c ¼ 349 kg Á m À3 , differ substantially with those derived in this research T c ¼ 825 K, p c ¼ 2680 kPa, and q c ¼ 328 kg Á m À3 . Figure 2 shows the major route for the hydrodesulfurization of dibenzothiophene [7][8][9][10][72][73][74]. A previous NIPER/DOE Report [17] compared the thermodynamics of nitrogen and sulfur removal in heavy oil upgrading, but was restricted to acyclic and monocyclic compounds.…”

Effect of Co on HDS Activity of Alumina-supported Heteropolymolybdate

“…The process was described with a scheme of four parallel consecutive reactions of pseudofirst order: hydrogenation of BT to DH, dehydrogenation of DH to BT, and hydrogenolysis of both BT and DH to EB (Scheme 1) [40,41]. Because none of the achieved rate constants k 1 -k 4 represented a proper index of overall HDS activity, conversion of EB, x EB , at space time W/F BT = 3 g h mol -1 taken from the fitting and an empiric pseudofirst order rate constant, k EB, of EB formation were used as the activity indexes.…”