Magnesium aluminate spinel-supported sulphur-tolerant methanation catalyst

A sulfur-resistant methanation, magnesium-aluminum spinel technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, organic chemistry, etc., can solve the problem of insufficient reaction stability and reaction catalytic activity decline, shortened catalyst life, etc.

Active Publication Date: 2013-07-10
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the catalysts disclosed in the above patent documents have certain improvements in terms of carbon monoxide conversion and methane selectivity compared to traditional catalysts, there are deficiencies in reaction stability. With long-term high-temperature use, the catalytic activity of the above catalysts will be obvious Decrease, which will lead to shortened catalyst life, at the same time, the production raw materials of the above catalysts, such as CeO 2 Expensive, so they can't achieve a good balance and balance between performance and production costs

Method used

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  • Magnesium aluminate spinel-supported sulphur-tolerant methanation catalyst
  • Magnesium aluminate spinel-supported sulphur-tolerant methanation catalyst
  • Magnesium aluminate spinel-supported sulphur-tolerant methanation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Example 1: Preparation of 15MoO 3 / 100 Al-Mg spinel (0.91Al 2 o 3 / 0.09MgO) catalyst

[0093] Step (1): Preparation of 91Al by co-precipitation method 2 o 3 -9MgO aluminum magnesium spinel porous support

[0094] 311.4 g Al(NO 3 )3 9H 2 O and 32.1 g Mg(NO 3 ) 3 ·6H 2 Dissolve O together in 500 ml of deionized water to form a mixed solution. Add the mixed solution and ammonia water with a concentration of 3 mol / L into the beaker under vigorous stirring at 70°C, keep the pH value at about 11, and react until the precipitation is complete. After static aging for 2 hours, the precipitate was filtered, washed three times with deionized water, and the obtained filter cake was dried in an oven at 120° C. for 12 hours to obtain a dry powder. The above dry powder was calcined in a muffle furnace at 700 °C for 2 hours to obtain 91Al 2 o 3 / 9MgO Al-Mg spinel porous carrier, its specific surface area measured by BET is 235m 2 / g. Step (2): Preparation of 15MoO 3 / 100...

Embodiment 2

[0098] Embodiment 2: Preparation of 15MoO 3 / 100 Al-Mg spinel (0.83Al 2 o 3 / 0.17MgO) catalyst

[0099] Step (1): Preparation of 83Al by co-precipitation method 2 o 3 -17MgO aluminum magnesium spinel porous carrier

[0100] In addition to Mg(NO 3 ) 3 ·6H 2 The amount of O is changed from 32.1 grams to 64.2 grams, and the step (1) in Example 1 is repeated to obtain 83Al 2 o 3 -17MgO Al-Mg spinel porous carrier, the BET specific surface area is 213m 2 / g.

[0101] Step (2): Preparation of 15MoO 3 / 100 Al-Mg spinel (0.83Al 2 o 3 / 0.17MgO) catalyst

[0102] Repeat step (2) in Example 1 to obtain 15MoO 3 / 100 Al-Mg spinel (0.83Al 2 o 3 / 0.17MgO) sulfur-resistant methanation catalyst, its specific surface area measured by BET is 197m 2 / g.

Embodiment 7

[0121] Example 7: Preparation of 15MoO 3 / 100 Al-Mg spinel (0.83Al 2 o 3 / 0.17MgO) catalyst

[0122] Step (1): Preparation of 83Al by impregnation method 2 o 3 -17MgO aluminum magnesium spinel porous carrier

[0123] 53.8 g Mg(NO 3 ) 3 ·6H 2 O was dissolved in 80 mL of deionized water to form a solution. Weigh 42 grams of alumina powder (commercial Sasol product, specific surface area is 200m 2 / g), then add alumina powder into the above solution and stir vigorously, evaporate the water to dryness, put it in a drying oven at 110°C for 16 hours, and finally bake it in a muffle furnace at 700°C for 2 hours to obtain 83Al 2 o 3 / 17MgO Al-Mg spinel porous carrier, its specific surface area measured by BET is 175m 2 / g.

[0124] Step (2): Preparation of 15MoO 3 / 100 Al-Mg spinel (0.83Al2 o 3 / 0.17MgO) catalyst

[0125] Repeat the process of step (2) in Example 1 to obtain 15MoO 3 / 100 Al-Mg spinel (0.83Al 2 o 3 / 0.17MgO) sulfur-resistant methanation catalyst, its ...

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Abstract

The invention discloses a magnesium aluminate spinel-supported sulphur-tolerant methanation catalyst. The magnesium aluminate spinel-supported sulphur-tolerant methanation catalyst comprises 0-20 parts (by weight) of catalyst auxiliary (M1) AOB (ammonia oxidizing bacteria), 5-90 parts (by weight) of catalyst active component (M2) COD (chemical oxygen demand), 5-90 parts (by weight) of support modifier (M3) EOF (electroosmotic flow), and 100 parts (by weight) of porous support-magnesium aluminate spinel, wherein M1 is Co, Ni, La and/or K; M2 is Mo, W and/or V; and M3 is Ce, Zr, Ti and/or Si.

Description

technical field [0001] The present invention relates to a kind of sulfur-resistant catalyst for methanation reaction, in particular, relates to a kind of syngas effective component CO and H containing acid gas such as hydrogen sulfide 2 converted to CH 4 A methanation reaction catalyst, wherein the catalyst is composed of a catalyst promoter, a catalyst active component, a carrier modifier and a porous carrier-magnesium aluminum spinel. At the same time, the invention also relates to a preparation method of the catalyst. Background technique [0002] The methanation reaction refers to the process in which CO in the synthesis gas reacts with H2 under the action of a certain temperature, pressure and catalyst to form methane. Its reaction formula can be expressed as follows: [0003] CO+3H 2 =CH 4 +H 2 O (1) [0004] CO+H 2 O=CO 2 +H 2 (2) [0005] 2CO+2H 2 =CH 4 +CO 2 (3) [0006] It is generally believed that the methanation reaction of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/882B01J23/883C07C9/04C07C1/04
Inventor 秦绍东田大勇龙俊英汪国高孙守理孙琦
Owner CHNA ENERGY INVESTMENT CORP LTD
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