Catalyst system for preparing fuel oil from shale oil through catalytic hydrogenation and use method of catalyst system

Abstract

The invention relates to a catalyst system for preparing fuel oil from shale oil through catalytic hydrogenation and a use method of the catalyst system. The catalyst system comprises a hydrogenationprotection catalyst, a hydrogenation refining catalyst and a hydrogenation modification catalyst, wherein the hydrogenation protection catalyst comprises a first carrier, a first active metal and a first aid metal; the hydrogenation refining catalyst comprises a second carrier, a second active metal and a second aid metal; the hydrogenation modification catalyst comprises a third carrier, a thirdactive metal and a third aid metal; both the first carrier and the second carrier are macropore aluminum oxide; the third carrier is aluminum oxide with a modified molecular sieve; the first active metal, the second active metal and the third active metal are selected from one or more of W, Mo, Ni and Co in an oxidation state; and the first aid metal, the second aid metal and the third aid metal are selected from one or more of vanadium series meals, zirconium series metals or lanthanide series metals. By adopting the catalyst system and the method, the problems of coking and catalyst poisoning are effectively solved, and the catalyst system is low in cost and safe and stable.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a catalyst system for preparing fuel oil by catalytic hydrogenation of shale oil and a use method thereof. Background technique [0002] Shale oil is a product produced by thermal decomposition of kerogen shale after thermal processing of its organic matter. It is similar to natural oil, but contains more unsaturated hydrocarbons than natural oil, and contains non-hydrocarbon organic compounds such as nitrogen, sulfur, and oxygen. These unsaturated hydrocarbons and non-hydrocarbon organic compounds are the main reasons for the increase of oil colloid and the formation of sediment, which lead to poor stability and black color. In addition, shale oil contains more inorganic impurities than petroleum. Shale oil is an important part of the energy industry and a supplementary energy source to natural petroleum. However, high heterocyclic aromatic hydrocarbons in shale oil hinder its...

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Problems solved by technology

[0004] The unsaturated components in shale oil will react sharply to form colloid, and then high-temperature coking will block the catalyst pores or catalyst bed, resulting in an increase in system pressure difference, a decrease in device stability, and even forced shutdown

In addition, because shale oil itself is not as stable as crude oil, it is prone to produce metastable substances at high temperatures, and these metastable substances are prone to polymerization in the high-temperature, high-pressure hydrogen atmosphere in the reactor, further aggravating the coking phenomenon

Colloids and coking will cause catalyst activity to decrease, or even deactivate

In addition, due to the high nitrogen content in shale oil, which can reach 5000-18000 μg / g, in this case the NH in the reactor 3 The relative content of the hydrogenation catalyst will be quite high, which will easily destroy the acidic center of the hydrogenation catalyst, and cause the hydrogenation catalyst to deactivate rapidly and shorten the service life. It is necessary to continuously interrupt production to replace the catalyst, resulting in high production costs

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