The Catalytic Hydrogenolysis Reaction of Dibenzothiophene

Abstract

Summary:The hydrogenolysis reaction of dibenzothiophene over molybdenum sulfide, tungsten sulfide, cobalt sulfide, and nickel sulfide catalysts were studied by means of a batch method. From the experimental results, the following conclusions were obtained.

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

“…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.…”

Hydrodesulfurization of dibenzothiophene catalyzed by sulfided CoO‐MoO3γ‐Al2O3: The reaction network

“…The hydrodesulfurization of dibenzothiophene has been investigated by Hoog (1950), Obolentsev andMashkina (1958, 1959), Landa and Mrnkova (1966), Urimoto and Sakikawa (1972), Bartsch and Tanielian (1974), and Rollmann ( 1977). The results of these authors, representing a variety of temperatures, hydrogen partial pressures, and catalyst compositions, fail to establish a unique reaction network (Kilanowski et al, 1978).…”

The thermodynamic properties of thianthrene and phenoxathiin

“…12C(cr, graphite) + 4H2(g) + S2(g)= C12HeS2(cr). c Sublimation pressure calculated using equation (14). d t_(p) = p{cr(I)} -p(calc)} is the difference between measured and calculated values of the sublimation pressure.…”

“…The method applied here was the same as that used previously for biphenyl (60). The sublimation vapor pressures for thianthrene were represented by the equation:In(p/pO)=29.3663-7641.7(T/K)'1-1.5411x106(T/K)-2+1.6388x108(T/K) -3,(14) in the temperature region 350 K to 429.576 K with pO= 1 Pa.4. DISCUSSION THIANTHRENE THE ENERGYOF COMBUSTIONANDENTHALPYOF FORMATION Literature values(23-28,30) for the energy of combustion of thianthrene are in excellent accord.…”