Bifunctional catalysis combining acidic catalysts and sulfide active phases is usually related to hydrocracking catalysts which balances the hydrogenation function of a NiMo (NiW) alumina supported sulfide catalysts and the acidic function of a zeolite. The discovery of sulfur-resistant catalysts for selective ring opening (SRO) is an important challenge for refiners, considering the future legislation on cetane index of diesel fuels. In the present work, we studied the properties of various transition metal sulfides (TMS) supported on Y zeolite in gas-phase decalin hydroconversion at high hydrogen pressure (5 MPa) in the presence of 0.8 % H₂S concentration. This screening shows high activities for noble metal based sulfides with a mechanism which proceeds by skeletal isomerization induced by the zeolite. Catalytic activity was improved by the use of ternary sulfides such as Ni_1-xRu_xS₂ or NiRh₂S₄ on Y zeolites. High decalin conversion levels can be reached below 250 °C with more of 20 % of ring opening products and thanks to the use of comprehensive GC, a detailed mechanism of the SRO of decalin is given.

结合酸性催化剂和硫化物活性相的双功能催化通常与加氢裂化催化剂有关，该催化剂平衡了 NiMo (NiW) 氧化铝负载的硫化物催化剂的加氢功能和沸石的酸性功能。考虑到未来有关柴油十六烷值指数的立法，发现用于选择性开环 (SRO) 的耐硫催化剂是炼油厂面临的一项重要挑战。在目前的工作中，我们研究了负载在 Y 沸石上的各种过渡金属硫化物 (TMS) 在高氢气压力 (5 MPa) 和 0.8% H ₂存在下的气相十氢化萘加氢转化的性质S 浓度。该筛选显示贵金属基硫化物的高活性，其机制是由沸石诱导的骨架异构化进行的。通过在 Y 沸石上使用三元硫化物，例如 Ni _1-x Ru _x S ₂或 NiRh ₂ S ₄来提高催化活性。在 250 °C 以下可以达到高的十氢化萘转化水平，开环产物超过 20%，并且由于使用了综合 GC，给出了十氢化萘 SRO 的详细机制。