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Hydro-denitrification catalyst for coal tar and preparation method thereof

A hydrodenitrogenation and catalyst technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Hydrodenitrogenation performance, the effect of reducing carbon deposition

Active Publication Date: 2013-11-13
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The experimental results of residual oil hydrogenation catalyst show that γ-Al 2 o 3 Strong interaction with active metals leads to incomplete sulfidation of active metals, which limits the further improvement of its catalytic performance in residual oil hydrogenation

Method used

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  • Hydro-denitrification catalyst for coal tar and preparation method thereof

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Experimental program
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preparation example Construction

[0026] The preparation method of catalyst of the present invention comprises:

[0027] The first step is to prepare the carrier:

[0028] 1) A certain number of parts by weight of activated carbon, alumina and Hβ molecular sieves are respectively ball milled to obtain a powder with a particle size of less than 0.046mm, and after drying at a temperature of 100-120°C for 2-6 hours, the carrier raw material powder is obtained for use;

[0029] 2) Add an aqueous organic acid solution (one of acetic acid, malonic acid or citric acid, with a concentration of 20-80vol.%) to the alumina powder and Hβ molecular sieve powder, and stir for 20-40 minutes to mix them Uniform; then add activated carbon powder and binder (one of sucrose, carboxymethyl cellulose or starch), continue to stir for 20-40 minutes to mix well, and let it stand in a closed container for 20-28 hours, then press or squeeze Out of shape;

[0030] 3) The formed carrier is dried at 100-120°C for 2-6h, and then placed i...

Embodiment 1

[0035] Weigh 54g of alumina powder milled to less than 0.046mm, 16g of Hβ molecular sieve powder with equal particle size, add 30cm 3 Acetic acid aqueous solution with a concentration of 80%, stirred for 40 minutes to make the mixture uniform, then added 24g of activated carbon powder with the same particle size, and added 30g of sucrose as a binder, and continued to stir for 40 minutes to make the mixture uniform. The obtained black viscous substance was left to stand in a closed container for 28 hours, and then pressed into tablets. Dry the obtained molding at 120°C for 2h, and then dry it at 600°CN 2 Calcined in the atmosphere for 2 hours, and after cooling, 101 g of the finished catalyst carrier was obtained. Calculated on a dry basis, alumina accounted for 53% of the total weight of the carrier, activated carbon accounted for 31% of the total weight of the carrier, and Hβ molecular sieve accounted for 16% of the total weight of the carrier.

[0036] Add 44g of ammonium m...

Embodiment 2

[0039] Weigh 68g of alumina powder milled to less than 0.046mm, 12g of Hβ molecular sieve powder with equal particle size, add 27cm 3 Concentration of 50% malonic acid aqueous solution, stir for 30 minutes to mix evenly, then add 16g of activated carbon powder with the same particle size, and add 20g carboxymethyl cellulose as a binder at the same time, continue to stir for 30min to mix evenly. The obtained black viscous substance was left to stand in a closed container for 24 hours, and then pressed into tablets. Dry the obtained molding at 110°C for 4h, and then at 500°CN 2 Calcined in the atmosphere for 4 hours, and after cooling, 100 g of the finished catalyst carrier was obtained. Calculated on a dry basis, alumina accounted for 68% of the total weight of the carrier, activated carbon accounted for 20% of the total weight of the carrier, and Hβ molecular sieve accounted for 12% of the total weight of the carrier.

[0040] Add 33g of ammonium metatungstate, the precursor ...

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Abstract

The invention discloses a hydro-denitrification catalyst for coal tar and a preparation method thereof. The catalyst is composed of an active component, an additive and a carrier, wherein the active component is composed of tungsten trioxide and nickel oxide, and through taking the total mass of the catalyst as a benchmark, the content of the tungsten trioxide accounts for 16-24 wt % of the catalyst, and the content of the nickel oxide accounts for 3-6 wt % of the catalyst; the additive is phosphorus, through taking the total mass of the catalyst as a benchmark, and in terms of an elementary substance, the phosphorus accounts for 1-2 wt % of the catalyst; through taking the total mass of the catalyst as a benchmark, and in terms of a carrier dry basis, the carrier accounts for 68-80 wt % of the catalyst; and the carrier is composed of activated carbon, alumina and a H beta molecular sieve, wherein the activated carbon accounts for 10-31 wt % of the carrier, the alumina accounts for 53-82 wt % of the carrier, and the H beta molecular sieve accounts for 8-16 wt % of the carrier. The catalyst disclosed by the invention is easy to vulcanize and relatively high in activity; and a pore structure of the activated carbon is adjustable, so that the conversion of colloid components and the removal of nitrogen impurities in coal tar are facilitated, thereby slowing the carbon deposition of the catalyst. Compared with conventional catalysts, the prepared catalyst has more excellent hydro-denitrification performance.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and relates to a catalyst and preparation method applicable to the hydrogenation and denitrification process in the process of producing fuel oil from medium and low temperature coal tar, in particular to the hydrogenation and denitrification of medium and low temperature coal tar with activated carbon added to the carrier Catalyst and method for its preparation. Background technique [0002] my country's energy status is "rich in coal, short of gas, and low in gas". The problem of energy supply has become a prominent problem facing my country's economic development and national security. In the case of limited oil resources and increasing demand for crude oil, it is of great practical and strategic significance to develop coal chemical industry and develop deep processing technologies and products. Coal tar is a by-product of coal coking, dry distillation and gasification. The domest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/78
Inventor 苏艳敏郑化安付东升李克伦肖荣林吕晓丽
Owner SHAANXI COAL & CHEM TECH INST
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