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Nickel-based catalyst and preparation method thereof

A nickel-based catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as poor nickel dispersion and achieve good technical effects. highly active effect

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the poor dispersion of nickel in existing nickel-based catalysts, and a nickel-based catalyst is provided

Method used

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  • Nickel-based catalyst and preparation method thereof
  • Nickel-based catalyst and preparation method thereof
  • Nickel-based catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] At a constant temperature of 35°C, mix 12.9 grams of tetraethyl orthosilicate 6 grams, surfactant P123, 11.8 grams of concentrated hydrochloric acid, 0.18 grams of nickel nitrate, 6 grams of n-butanol, and 217 grams of water, and mix the mixed solution at a constant temperature of 35°C Stir under low temperature for 24 hours, then stand at 95°C for 48 hours, then cool it to room temperature and adjust pH=8 with ammonia water, continue to stand at 95°C for 48 hours, filter, dry, and place in a muffle furnace at 550°C Calcined under air atmosphere for 4 hours, then put it under hydrogen atmosphere, after 650°C reduction activation for 4 hours, the catalyst of the present invention was obtained.

[0018] Catalyst performance evaluation was carried out in a fixed-bed quartz reactor with an inner diameter of 7 mm, loaded with 0.2 g of catalyst, and fed methane and carbon dioxide gas with a molecular ratio of 1:1, and the space velocity was 1.56×10 4 Hour -1 , reacted at 800...

Embodiment 2～6

[0020] According to the synthesis steps described in Example 1, only changing the amount of nickel nitrate added, the catalyst of the present invention with a nickel content of 4%, 6%, 10%, 20%, and 30% can be synthesized. See catalyst formulation, preparation conditions and physical properties. Table 1 and Table 2. The catalyst evaluation method is the same as that in Example 1, and the catalytic reaction evaluation results are shown in Table 3.

Embodiment 7～18

[0022] According to the synthesis steps described in Example 1, the catalyst of the present invention can be synthesized by changing the type and proportion of silicon source, nickel source, surfactant, and pH regulator. The catalyst formula, preparation conditions and physical properties are shown in Table 1 and Table 2. . The catalyst evaluation method is the same as that in Example 1, and the catalytic reaction evaluation results are shown in Table 3.

[0023] Synthetic raw materials, proportioning ratio and catalyst physical properties of catalyst in Table 1 embodiment 1~18

[0024]

[0025]

[0026] The preparation conditions of catalyst in table 2 embodiment 1~18

[0027]

[0028] Catalytic performance of the catalyst in the embodiment 1-18 of table 3 to carbon dioxide reforming methane reaction

[0029]

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Abstract

The invention relates to a nickel-based catalyst and a preparation method thereof, and mainly aims at solving the problem that the metal nickel grain of the conventional nickel-based catalyst is poor in dispersity. The problem is well solved by adopting the technical scheme of the nickel-based catalyst and the preparation method of the nickel-based catalyst, wherein the nickel-based catalyst comprises the following ingredients in parts by weight: A) 1-30 parts of metal nickel; and B) 100 parts of silicon oxide, wherein the number of the metal nickel grains which is less than 5 nanometers in the catalyst is more than 85% of the total number of the metal nickel grains; and the specific surface area of the catalyst is 100-1000m<2> / g, and the pore volume of the catalyst is 0.2-2.5cm<3>. The preparation method can be used in industrial preparation of the nickel-based catalyst.

Description

technical field [0001] The invention relates to a nickel-based catalyst and a preparation method thereof. Background technique [0002] Nickel-based catalysts are widely used due to their simple preparation method, low price, excellent performance and easy recycling, such as hydrogenation catalysts, olefin polymerization catalysts, methanol hydroxylation catalysts, etc., but the nickel-based catalysts prepared by the traditional impregnation method, Nickel particles are of different sizes and unevenly dispersed, and most of them have a particle size of more than 10 nanometers. After high-temperature reaction, metal Ni is easy to agglomerate and carbon deposits are likely to be generated during the reaction to cover the surface of the catalyst and cause catalyst deactivation [J.T. Richardson; S.A. Paripatyadar. Appl Catal. 1990, 61, 293.]. [0003] In order to solve the above problems, in recent years, researchers have proposed to control the grain size and distribution of n...

Claims

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Application Information

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IPC IPC(8): B01J23/755C01B3/40
CPCY02P20/52
Inventor 刘志成曹焜高焕新杨为民许云风
Owner CHINA PETROLEUM & CHEM CORP
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