Abstract

Bimetallic catalysts MoW/СОK-12 are synthesized on the basis of mesostructured silicate COK‑12 prepared from sodium silicate aqueous solution using the Keggin structure hetero polyacid H₄Si-Mo₃W₉O₄₀ as an oxide precursor of the sulfide active phase and with the use of the mechanical mixture of two monometallic hetero polyacids (H₄SiMo₁₂O₄₀ and H₄SiW₁₂O₄₀) at a molar ratio of Mo/W = 3/9. Alumina-based analogs with the same surface metal content are used as reference samples. The test samples are analyzed by low-temperature nitrogen adsorption and high-resolution transmission electron microscopy. The catalytic activity is studied in the combined hydrotreatment of dibenzothiophene and naphthalene and in the hydrodesulfurization of 4,6-dimethyldibenzothiophene in a flow unit. It is shown that the use of mesostructured silicate COK-12 as a support leads to an increase in catalytic activity in target hydrotreating reactions.

中文翻译：

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基于杂多酸SiMo 3 W 9和介孔结构硅酸盐COK-12的新型双金属加氢处理催化剂MoWS 2

摘要

MoW /СОK-12双金属催化剂是在介孔结构硅酸盐COK-12的基础上合成的，介孔结构是从硅酸钠水溶液中制备的，使用Keggin结构杂多酸H ₄ Si-Mo ₃ W ₉ O ₄₀作为硫化物活性相的氧化物前体，使用两种单金属杂多酸（H ₄ SiMo ₁₂ O ₄₀和H ₄ SiW ₁₂ O ₄₀）的摩尔比为Mo / W = 3/9。具有相同表面金属含量的基于氧化铝的类似物用作参考样品。通过低温氮吸附和高分辨率透射电子显微镜对测试样品进行分析。在二苯并噻吩和萘的联合加氢处理中以及在流动单元中对4,6-二甲基二苯并噻吩进行加氢脱硫研究了催化活性。结果表明，使用介孔结构的硅酸盐COK-12作为载体会导致目标加氢处理反应中催化活性的增加。