Transition metal phosphide hydrofined catalyst and preparation method thereof

Abstract

The invention relates to a transition metal phosphide hydrofined catalyst and a preparation method thereof. In the transition metal phosphide hydrofined catalyst, mesoporous carbon is used as a carrier, the phosphide of a first transition metal is used as an active component, and a second transition metal element is used as an aid. The phosphide of the first transition metal is one or more phosphides of Fe, Co, Ni, W, Mo, Ru, Pd and Pt, and the second transition metal element is one or more metals or metallic oxides of Ti, Ce, La, Y, Zn and Nb. The phosphide of the first transition metal is loaded by a method for dipping in required transition metal phosphate solution; after drying and roasting, the second transition metal element is loaded by a dipping method; and the final catalyst is obtained after drying, sintering and reducing. The transition metal phosphide hydrofined catalyst has high activities of hydrodesulphurization and hydrodedenitrification and is particularly suitable for a deep desulphurization reaction process of macromolecular sulfocompounds difficult to remove in distillate oil.

Description

technical field [0001] The invention relates to a hydrorefining catalyst and a preparation method thereof, in particular to a hydrorefining catalyst containing transition metal phosphides and a preparation method thereof. Background technique [0002] In recent years, the trend of heavy and inferior oil has become increasingly serious, and environmental protection regulations have become increasingly stringent, making the development direction of diesel hydrofining technology as follows: the processed raw materials are developed towards high sulfur, and the products produced are towards ultra-low sulfur clean Fuel direction development. Starting from 2009 in EU countries, all motor vehicles must fully use sulfur-free fuels with a sulfur content of less than 10 μg / g (Euro V standard). China's vehicle fuel standards are also constantly improving. Beijing and other places have begun to implement emission standards equivalent to Euro IV (sulfur content less than 50 μg / g) in 200...

AI Technical Summary

Problems solved by technology

The supported phosphide catalyst has the advantages of high metal utilization rate and easy adjustment of pore structure, but its disadvantage is that the force between the active component and the support is strong, making it difficult to form phosphide or the phosphide is not in an ideal catalytic state , the dispersity of the generated phosphide is not high, which reduces the activity of the catalyst