Preparation method of catalyst carrier for preparing natural gas from coke-oven gas

A catalyst carrier and natural gas technology, applied in the field of catalysis, can solve the problems of difficult operation, high reaction space velocity, high pressure, poor high temperature resistance, etc., and achieve the effects of good hydrothermal stability and less carbon deposition.

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Domestically, methanation catalysts have been developed a long time ago, mainly used for syngas purification, such as J105 developed by Nanhua Group Research Institute, which is suitable for methanation of low-concentration carbon oxides in feed gas, and is not easy to operate at high temperatures
The new methanation catalyst prepared in Chinese patent CN200710146033.7 is used for deep methanation of syngas to produce high-concentratio

Method used

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  • Preparation method of catalyst carrier for preparing natural gas from coke-oven gas

Examples

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Embodiment 1

[0019] Example 1: (1) mix 800g of magnesium nitrate with water; (2) under stirring, add the prepared sodium carbonate solution into the solution formed in step 1 for neutralization reaction, the reaction temperature is 60°C, and the pH value at the end of the reaction is controlled at 8.0; (3) Wash the precipitate obtained in step 2 with deionized water; (4) add 90g of calcium oxide, 30g of magnesium oxide and 300g of γ-Al to the washed qualified precipitate obtained in step 3 2 o 3 Mix and beat together; (5) The material is filtered, dried, and roasted at 550°C for 2 hours; (6) Add 3% methyl cellulose for granulation; (7) Press into tablets; Calcined for 2 hours to obtain the methane synthesis catalyst carrier I.

Embodiment 2

[0020] Example 2: (1) Mix 600g of magnesium sulfate with water; (2) Under stirring, add the prepared sodium bicarbonate solution into the solution formed in step 1 for neutralization reaction, the reaction temperature is 90°C, and the pH value at the end of the reaction is controlled At 8.0; (3) Wash the precipitate obtained in step 2 with deionized water; (4) add 90g of calcium oxide, 90g of magnesium oxide, 150g of lanthanum nitrate and 350g of γ-Al to the washed precipitate obtained in step 3 2 o 3 Mixing and beating together; (5) The material is filtered, dried, and roasted at 450°C for 2 hours; (6) Add 5% cellulose acetate for granulation; (7) Press into tablets; (8) Roast at 900°C 2h to obtain the methane synthesis catalyst carrier II.

Embodiment 3

[0021] Example 3: (1) mix 600g of magnesium sulfate with water; (2) under stirring, add the prepared sodium carbonate solution into the solution formed in step 1 for neutralization reaction, the reaction temperature is 80°C, and the pH value at the end of the reaction is controlled at 7.5; (3) Wash the precipitate obtained in step 2 with deionized water; (4) add 150g of barium oxide, 90g of magnesium oxide, 150g of cerium nitrate and 350g of γ-Al to the washed qualified precipitate obtained in step 3 2 o 3 Mixing and beating together; (5) The material is then filtered, dried, and roasted at 500°C for 2 hours; (6) Add 4% nitrocellulose for granulation; (7) Press into tablets; (8) Roast at 900°C 2h to obtain the methane synthesis catalyst carrier III.

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Abstract

The invention belongs to the technical field of catalysis, and relates to a preparation method of a catalyst carrier for preparing natural gas from coke-oven gas. The preparation method comprises the following steps: neutralizing a soluble salt solution of magnesium by using an alkali, washing the above obtained precipitate until the precipitate is qualified, adding alkali earth oxide, rare earth metal nitrate and gamma-Al2O3, mixing and beating above materials, filtering the obtained mixture, drying the filtered mixture, roasting the dried mixture, granulating the roasted mixture, carrying out pressing molding, and roasting the molded mixture to obtain the catalyst carrier The carrier has good hydrothermal stability, and a methane synthesis catalyst prepared by using the carrier is suitable for a methanation reaction for preparing natural gas from C2 hydrocarbon-containing coke-oven gas and realizes difficult carbon deposition at high CO content.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and relates to a method for preparing a catalyst carrier for natural gas produced from coke oven gas. Background technique [0002] In recent years, with the successive completion and commissioning of national-level gas transmission projects such as "Shaanxi Gas Entering Beijing" and "West-to-East Gas Transmission", the demand for natural gas has shown explosive growth, and my country will face the challenge of natural gas supply security. [0003] As a high-quality clean energy, the proportion of natural gas in my country's energy consumption is increasing year by year. Over the years, the production of natural gas is far from meeting the demand of consumption, resulting in a substantial increase in the import of natural gas year by year. Therefore, people began to pay attention to the use of coke oven gas to produce natural gas to meet the growing demand for natural gas. In recent years, Ch...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/10B01J23/83C10L3/08
Inventor 张杰吴琳朱艳芳吴学其徐本刚蔡进黄先亮王金利魏士新
Owner CHINA PETROLEUM & CHEM CORP
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