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Preparation method of polyhydroxy phenyl improved type methanation catalyst

The technology of a methanation catalyst and polyhydroxy phenol is applied in the field of preparation of an improved polyhydroxy phenol methanation catalyst, which can solve the problems of strong alkalinity of the catalyst, residual precipitant, deactivation and the like, and achieve uniform grain size and distribution. uniform effect

Active Publication Date: 2015-04-22
HUANENG CLEAN ENERGY RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the Chinese patent application CN103071507A (named "a method for preparing a complete methanation catalyst"), a step-by-step reverse precipitation method is adopted, and the obtained catalyst has high activity and stability, but the preparation steps are too cumbersome and there are many interference factors , easy to cause unstable performance of different batches of catalysts
[0004] In the Chinese patent application CN102513119A (named "a catalyst for coal-to-natural gas and its preparation method"), the catalyst is prepared by coprecipitation method, and the catalyst has the advantages of high strength, good activity, good thermal stability, and anti-carbon deposition. However, this type of catalyst is often prone to entrapment during the preparation process, and the residual precipitant causes the catalyst to be too alkaline and deactivated.

Method used

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  • Preparation method of polyhydroxy phenyl improved type methanation catalyst
  • Preparation method of polyhydroxy phenyl improved type methanation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A preparation method of polyhydric phenol improved methanation catalyst, comprising the following steps:

[0023] Step 1. Take 100g of alumina and add 20g of ethanol as a dispersant, and mill it on a ball mill for 30 minutes to achieve the effect of surface activation;

[0024] Step 2, take 0.5g phloroglucinol and 11.6g nickel nitrate to configure nickel nitrate-phloroglucinol solution, and impregnate 10g of activated alumina prepared in step 1;

[0025] Step 3. Dry the catalyst precursor prepared in step 2 overnight at room temperature, dry at 105°C for 4h, and calcinate at 550°C for 5h in an air atmosphere. Phloroglucinol is decomposed at high temperature to obtain 23.1NiO / Al 2 o 3 (3.85 Phloroglucinol A) catalyst.

[0026] The composition and activity evaluation results of the catalyst in this example are shown in Table 1.

Embodiment 2

[0028] A preparation method of polyhydric phenol improved methanation catalyst, comprising the following steps:

[0029] Step 1, take 100g of pseudo-boehmite and add 20g of ethanol as a dispersant, and ball mill on a ball mill for 30 minutes to achieve the effect of surface activation;

[0030] Step 2, taking 0.5g phloroglucinol and 11.6g nickel nitrate to configure nickel nitrate-phloroglucinol solution, impregnated into 13.5g activated pseudoboehmite prepared in step 1;

[0031] Step 3. Dry the catalyst precursor prepared in step 2 overnight at room temperature, dry at 105°C for 4h, and calcinate at 550°C for 5h in an air atmosphere. Phloroglucinol is decomposed at high temperature to obtain 23.1NiO / Al 2 o 3 (3.85 Phloroglucinol B) catalyst.

[0032] The composition and activity evaluation results of the catalyst in this example are shown in Table 1.

Embodiment 3

[0034] A preparation method of polyhydric phenol improved methanation catalyst, comprising the following steps:

[0035] Step 1. Take 100g of alumina and add 20g of ethanol as a dispersant, and mill it on a ball mill for 30 minutes to achieve the effect of surface activation;

[0036] Step 2, take 0.5g hydroquinone and 11.6g nickel nitrate to configure nickel nitrate-hydroquinone solution, impregnate 10g activated alumina prepared in step 1;

[0037] Step 3. Dry the catalyst precursor prepared in step 2 overnight at room temperature, dry at 105°C for 4h, and calcinate at 550°C for 5h in an air atmosphere. Hydroquinone is decomposed at high temperature to obtain 23.1NiO / Al 2 o 3 (3.85% Hydroquinone A) catalyst.

[0038] The composition and activity evaluation results of the catalyst in this example are shown in Table 1.

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Abstract

The invention discloses a preparation method of a polyhydroxy phenyl improved type methanation catalyst. The preparation method comprises the following steps: firstly, adding an ethanol dispersant into aluminum oxide or pseudo-boehmite, and performing ball milling on a ball mill to prepare activated aluminum oxide or pseudo-boehmite microsphere particles; secondly, preparing a nickel nitrate-polyhydroxy phenyl solution by using polyhydroxy phenyl and nickel nitrate, or preparing a nickel nitrate / M nitrate-polyhydroxy phenyl solution by using polyhydroxy phenyl, nickel nitrate and nitrate corresponding to an auxiliary agent M, and dipping to an activated aluminum oxide or pseudo-boehmite microsphere particles carrier; and finally, drying overnight at room temperature, and calcining at a nitrogen atmosphere or air atmosphere to prepare a NiO / Al2O3 catalyst or NiO-M / Al2O3 catalyst. By adopting the preparation method disclosed by the invention, the activity, selectivity and thermal stability of the catalyst are improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts for coal-to-natural gas, and in particular relates to a preparation method of a polyhydroxyphenol-improved methanation catalyst. Background technique [0002] The key to the coal-to-natural gas process is the methanation catalyst. Nickel-based catalysts have been widely used because of their high conversion rate, good selectivity, and strong adaptability to feed gas. It is also a research hotspot. [0003] In the Chinese patent application CN103071507A (named "a method for preparing a complete methanation catalyst"), a step-by-step reverse precipitation method is adopted, and the obtained catalyst has high activity and stability, but the preparation steps are too cumbersome and there are many interference factors , easily lead to unstable performance of different batches of catalysts. [0004] In the Chinese patent application CN102513119A (named "a catalyst for coal-to-natural gas and its pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/83C07C1/04C07C9/04
Inventor 王晓龙蒋彪郜时旺肖天存许世森
Owner HUANENG CLEAN ENERGY RES INST
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