Abstract
This paper describes the first example of using porous aromatic frameworks as supports for sulfide catalysts for the hydrogenation of aromatic hydrocarbons. The synthesis of bimetallic Ni-W and Ni-Mo sulfides was performed by in situ decomposition of [(n-Bu)4N]2[Ni(MeS4)2] (Me = W, Mo) complexes, supported on mesoporous aromatic framework with a diamond-like structure. It is shown that the highest naphthalene conversions were achieved in the case of additional sulfidation with sulfur. After the reaction, catalysts were characterized by X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. The activity of synthesized catalysts has been studied using naphthalene as a model substrate. The materials used in this study were substantially active in hydrogenation and slightly in hydrocracking of naphthalene.
Highlights
One of the current problems of modern petrochemistry is the search for highly efficient catalysts for conversion of heavy hydrocarbons into light products by hydrocracking-hydrogenation reactions
The mechanisms, by which metal sulfides decompose to their active form were investigated in several studies [10,11]
The successfulinfiltration infiltrationofof metal salts the porous aromatic frameworks (PAF) be shown by photographic
Summary
One of the current problems of modern petrochemistry is the search for highly efficient catalysts for conversion of heavy hydrocarbons into light products by hydrocracking-hydrogenation reactions. VIB (molybdenum and tungsten) and Group VIII (cobalt, nickel) are of great industrial interest due to they are widely used in petroleum refining for hydroprocessing applications. These sulfides are active in catalytic coal liquefaction [1], i.e., in breaking up macromolecules into low molecular weight fragments. The mechanisms, by which metal sulfides decompose to their active form were investigated in several studies [10,11]. It is well-known, that the NiMoS (or NiWS) phase could be considered as slabs or “sandwiches”, where two sulfur compact planes are placed one over the other and form trigonal prismatic holes
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