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首页> 外文期刊>Solid Fuel Chemistry >Sulfidation of an Aluminum-Nickel-Molybdenum Catalyst and Its Activity in Thiophene Hydrodesulfurization
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Sulfidation of an Aluminum-Nickel-Molybdenum Catalyst and Its Activity in Thiophene Hydrodesulfurization

机译：铝镍钼催化剂的硫化及其在噻吩加氢脱硫中的活性

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We consider the interaction of H_2S with the molybdenum component of the catalyst using an MO_7O_(24)H_(12) cluster as an example. At 200-300℃, SH groups substitute for OH groups of the molybdenum component. Intense reduction of the molybdenum component starts at 300℃. The reaction of hydrogen with the molybdenum component at 300℃ generates Mo-H hydride groups, Mo~(5+) ions, and anionic vacancies; these vacancies are filled in by sulfur anions produced by the dissociation of hydrosulfuric acid. An NiMoO_4 crystal phase is reduced and completely sulfided at 300℃. Mo_7O_(24)H_(14) clusters are sulfided only partially; complete substitution by sulfur does not occur in them even at 600-650℃. We consider the thiophene hydrodesulfurization scheme on molybdenum oxysulfide in the presence of nickel, as well as the scheme of this reaction on MoS_2 in the absence of nickel. We conclude that hydrodesulfurization and hydrid-ing occur at the same sites. Catalytically active surface sites in Mo_7O_xS_y + Ni, MoS_2 + Ni, and MoS_2 structures are alike. A common feature of these structures is the existence of Mo-H~- and MoSH" basic sites. The difference between them lies in the nature of proton-donor sites: in MoS_2, proton donors are Mo-S-H~+ groups, whereas in nickel-containing structures, nickel crystallites reacting with hydrogen are generators of protons and hydride ions.
机译：我们以MO_7O_（24）H_（12）簇为例，研究了H_2S与催化剂中钼组分的相互作用。在200-300℃下，SH基团取代了钼组分的OH基团。钼成分从300℃开始强烈还原。氢与钼组分在300℃下反应生成Mo-H氢化物基团，Mo〜（5+）离子和阴离子空位。这些空位被氢硫酸解离产生的硫阴离子所填补。 NiMoO_4晶相在300℃被还原并完全硫化。 Mo_7O_（24）H_（14）团簇仅被部分硫化；即使在600-650℃下，硫也不会完全取代。我们考虑在存在镍的情况下对氧硫化钼进行噻吩加氢脱硫的方案，以及在不存在镍的情况下在MoS_2上进行该反应的方案。我们得出结论，加氢脱硫和氢化发生在相同的位置。 Mo_7O_xS_y + Ni，MoS_2 + Ni和MoS_2结构中的催化活性表面位点相似。这些结构的共同特征是存在Mo-H〜-和MoSH“碱性位点。它们之间的区别在于质子供体位点的性质：在MoS_2中，质子供体是Mo-SH〜+基团，而在MoS_2中，质子供体是Mo-SH〜+基团。含镍结构，与氢反应的镍微晶是质子和氢离子的产生者。

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    《Solid Fuel Chemistry》 |2009年第6期|400-408|共9页
  • 作者

    G. D. Chukin; B. K. Nefedov;

  • 作者单位

    Institute for Fossil Fuels-Science and Technology Center for Complex Processing of Solid Fossil Fuels, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991 Russia;

    Institute for Fossil Fuels-Science and Technology Center for Complex Processing of Solid Fossil Fuels, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991 Russia;

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