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Methanation catalyst used for preparing substitute natural gas from synthesis gas, and preparation method and application thereof

A methanation catalyst and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, gas fuels, etc., to improve low-temperature methanation activity, thermal stability, The effect of carbon properties

Inactive 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

[0005] Chinese patent CN101347735A discloses a methanation catalyst for removing trace carbon oxides in crude hydrogen gas. The active components are nickel oxide, tungsten oxide and / or aluminum oxide, selected from alkali metal oxides and alkaline earth metal oxides and at least one of rare earth metal oxides, the carrier is alumina, silica, titania, zirconia or their mixtures, which have high low-temperature activity, high anti-poisoning ability and thermal stability, but only Methanation for low CO concentrations

Method used

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  • Methanation catalyst used for preparing substitute natural gas from synthesis gas, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 nickel-lanthanum / magnesium-Al 2 o 3

[0031] Weigh the treated Al 2 o 3 Microsphere 10g, denoted as A.

[0032] Measure 20.56mL of 2M magnesium nitrate solution, and concentrate the solution to about 7.5mL by heating. Put A into the solution for immersion, and the immersion time is 8 hours. After impregnation, put A into a muffle furnace and heat at a high temperature at 700°C for 6 hours to obtain B.

[0033] Measure 12.78ml of 2M nickel nitrate solution and 2.4mL of 0.3M lanthanum nitrate solution, mix well, heat and concentrate the solution to about 7.5mL. Put B into the mixed solution and soak for 8 hours. After impregnation, put B into a muffle furnace and heat at a high temperature at 600°C for 6 hours to obtain a catalyst containing 15% nickel, 10% magnesium and 1% lanthanum.

Embodiment 2

[0034] Embodiment 2 nickel-magnesium-lanthanum / magnesium-Al 2 o 3

[0035] Weigh the processed Al 2 o 3 Microsphere 10g, denoted as A.

[0036] Measure 20.56mL of 2M magnesium nitrate solution, and concentrate the solution to about 7.5mL by heating. Put A into the solution for immersion, and the immersion time is 8 hours. After impregnation, put A into a muffle furnace and heat at a high temperature at 900°C for 6 hours to obtain B.

[0037] Measure 12.78ml of 2M nickel nitrate solution, 10.28mL of 2M magnesium nitrate solution, and 6mL of 0.3M lanthanum nitrate solution, mix well, heat and concentrate the solution to about 7.5mL. Put B into the mixed solution and soak for 8 hours. After impregnation, put B into a muffle furnace and heat at a high temperature at 630°C for 6 hours to obtain a catalyst containing 15% nickel, 15% magnesium and 2.5% lanthanum.

Embodiment 3

[0038] Example 3 Nickel-lanthanum / magnesium-Al 2 o 3

[0039] Weigh the treated Al 2o 3 Microsphere 10g, denoted as A.

[0040] Measure 20.56mL of 2M magnesium nitrate solution, and concentrate the solution to about 7.5mL by heating. Put A into the solution for immersion, and the immersion time is 8 hours. After impregnation, put A into a muffle furnace and heat at a high temperature at 900°C for 6 hours to obtain B.

[0041] Measure 6.39ml of 2M nickel nitrate solution and 12mL of 0.3M lanthanum nitrate solution, mix well, heat and concentrate the solution to about 7.5mL. Put B into the mixed solution and soak for 8 hours. After impregnation, put B into a muffle furnace and heat at a high temperature at 700°C for 8 hours to obtain a catalyst containing 7.5% nickel, 10% magnesium and 5% lanthanum.

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Abstract

The invention discloses a methanation catalyst. The methanation catalyst comprises a. 5-30wt% of nickel by metallic element, b. 0-30wt% of magnesium and / or calcium by metallic element, c. 0-5.0wt% of lanthanide series metals by metallic element, d. 5-30wt% of magnesium aluminate spinel by magnesium element and e. the balance of Al2O3. A preparation method of the catalyst comprises the following steps of: adhering a water-soluble salt containing magnesium to Al2O3 and roasting the components so that a magnesium aluminate spinel structure is generated on the surface of a catalyst support; dipping water-soluble salts of the components a, b and c on the support; and drying and roasting the support, thus obtaining the catalyst. On the XRD (X-ray diffraction) spectrogram of the catalyst support, a group of obvious magnesium aluminate spinel characteristic diffraction peaks exist between 10 degrees and 80 degrees (angle 2theta). The catalyst has the characteristics of high low-temperature methanation activity, good heat stability, good anti-carbon deposition property and the like.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, in particular to a methanation catalyst, its preparation and its application in the process of producing substitute natural gas from synthetic gas. Background technique [0002] The long-term problems of resource shortage, price rise and energy security in domestic natural gas supply provide an opportunity for the application of coal-based natural gas (SNG) technology. Utilize coal with relatively large resource advantages in my country, especially some low-calorific-value lignite, high-sulfur coal that is banned from mining, and coal resources that are located in remote areas with high transportation costs, and transform them on-site through coal gasification, CO conversion, and methanation. Utilizing natural gas is a good way to utilize coal. Among them, methanation is a core technology in the process of coal-to-natural gas substitution. [0003] Research on CO methanation can be...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/755C07C1/04C07C9/04C10L3/08
Inventor 潘智勇慕旭宏宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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