Bulk metallic catalyst precursor compositions are provided that include a Group VIB metal, a Group VIII metal, an organic-compound based component, and an organo-metalloxane polymer or gel. The catalyst precursor compositions can further include a binder. Amorphous sulfided catalysts formed from the catalyst precursor compositions are also provided. The catalyst precursor compositions can have a surface area of about 20 m.sup.2/g or less.

The present invention relates to the preparation of catalysts used in the hydrodesulfurization of fossil fuels and proposes a method for preparing thermally stable, low-cost catalysts for the hydrodesulfurization of petrol and diesel, based on highly active CoMo and NiMo. The catalyst for the hydroprocessing of gasoil or petrol in the present invention comprises a precursor which consists of chemical compounds obtained from organic acids and metal salts, and a support containing an ultra-stable Y-type zeolite useful in the hydroprocessing of heavy gas oil and/or light cyclic gas oil with high conversion rates.

The present invention relates to the preparation of catalysts used in the hydrodesulfurization of fossil fuels and proposes a method for preparing thermally stable, low-cost catalysts for the hydrodesulfurization of petrol and diesel, based on highly active CoMo and NiMo. The catalyst for the hydroprocessing of gasoil or petrol in the present invention comprises a precursor which consists of chemical compounds obtained from organic acids and metal salts, and a support containing an ultra-stable Y-type zeolite useful in the hydroprocessing of heavy gas oil and/or light cyclic gas oil with high conversion rates.

The present invention provides a transition metal chalcogenide photocatalyst, a reactor using the transition metal chalcogenide photocatalyst, and methods of making and using a transition metal chalcogenide photocatalyst for reforming CH.sub.4 with CO.sub.2.

Disclosed here is a method for hydrocarbon conversion, comprising contacting at least one graphene-supported assembly with at least one hydrocarbon feedstock, wherein the graphene-supported assembly comprises (i) a three-dimensional network of graphene sheets crosslinked by covalent carbon bonds and (ii) at least one metal chalcogenide compound disposed on the graphene sheets, wherein the chalcogen of the metal chalcogenide compound is selected from S, Se and Te, and wherein the metal chalcogenide compound accounts for at least 20 wt. % of the graphene-supported assembly.

Bulk metallic catalyst precursor compositions are provided that include a Group VIB metal, a Group VIII metal, an organic-compound based component, and an organo-metalloxane polymer or gel. The catalyst precursor compositions can further include a binder. Amorphous sulfided catalysts formed from the catalyst precursor compositions are also provided. The catalyst precursor compositions can have a surface area of about 20 m.sup.2/g or less.

Systems and methods are provided for slurry hydroconversion of a heavy oil feedstock, such as an atmospheric or vacuum resid, in the presence of an enhanced or promoted slurry hydroconversion catalyst system. The slurry hydroconversion catalyst system can be formed from a) a Group VIII non-noble metal catalyst precursor/concentrate (such as an iron-based catalyst precursor/concentrate) and b) a Group VI metal catalyst precursor/concentrate (such as a molybdenum-based catalyst precursor/concentrate) and/or a Group VI metal sulfided catalyst.

A method is disclosed for preparing a slurry catalyst for use in upgrading a renewable feedstock. The method includes the steps of (a) providing a rework material obtained from a process of making a supported hydroprocessing catalyst, the hydroprocessing catalyst comprising a support and an active component supported thereon, wherein the rework material has an average particle size of from 1 to 300 m; (b) mixing the rework material with a liquid component to form a slurry catalyst precursor, wherein the liquid component is selected from the renewable feedstock and a liquid carrier, wherein the liquid carrier is a polyol and/or a recycled renewable feedstock comprising heavy and/or unconverted fractions from a slurry hydroprocessing process; and (c) sulfiding the slurry catalyst precursor forming the slurry catalyst.

Photocatalytic water-splitting processes are described using an aqueous solution of at least one neutral salt, where the process is conducted at a temperature of 200-400 C. When compared with conventional photocatalytic water-splitting processes, the processes of the invention give rise to notably increased activity and quantum efficiency.