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- W2022164594 abstract "Abstract The reactions of diphenyl ether (DPE) and diphenylmethane (DPM) with hydrogen, hydrogen sulphide and combinations thereof in stainless steel reactors are described. The use of hydrogen or hydrogen sulphide alone produces little cleavage of these compounds after 1 h at 450 °C. Both DPE and DPM are extensively converted when hydrogen and hydrogen sulphide are used in tandem. DPE mainly produces phenol and benzene with smaller amounts of cyclohexane and methylcyclopentane. Reactions of benzene and phenol indicate phenol to be the major precursor of the hydrogenated products. DPM produces benzene and toluene. The reactivity of the H2H2S system is ascribed to the formation of iron sulphides on the stainless steel reactor surface followed by the hydrocracking of the organic compounds over this activated surface. The reaction rates of DPE and DPM with H2 and H2H2S were shown to depend on the concentration of the organic substrate raised to the first power. Activation energies for these reactions are dependent upon the presence of H2S: H2DPE 45 kcal/mol, H2H2SDPE 31 kcal/mol, H2DPM 50 kcal/mol, H2H2SDPM 37 kcal/mol. Pyrrhotite was added to the DPE and DPM reactions and its activity determined as a function of hydrogen sulphide pressure. Comparison of these results to in situ Mossbauer analyses of the added pyrrhotite allowed the correlation of the sulphide catalyst composition to reactivity. For both DPE and DPM, the highest catalytic activity was reached at 5% partial pressure of hydrogen sulphide. At this partial pressure, pyrrhotite is the dominant form of iron sulphide present in the catalyst." @default.
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- W2022164594 date "1987-04-01" @default.
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- W2022164594 title "Hydrocracking of diphenyl ether and diphenylmethane in the presence of iron sulphides and hydrogen sulphide" @default.
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- W2022164594 doi "https://doi.org/10.1016/0016-2361(87)90160-8" @default.
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