Catalyst for complete methanation of synthesis gas from coal and preparation method thereof

A technology for complete methanation and coal-to-synthesis gas, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Lack of operating experience, small number of development and other problems, to achieve the effect of reducing the risk of pyrolysis carbon deposition, improving catalytic activity, and increasing surface area

Active Publication Date: 2011-08-03
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current methanation catalysts are not suitable for coal-to-natural gas projects, and there is also a lack of operating experience in the complete methanation process of coal-to-synthesis gas. It is necessary to carefully study the applicable range of catalysts during the inspection.
However, the number of

Method used

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  • Catalyst for complete methanation of synthesis gas from coal and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] The mass percent content of each component of the present embodiment is: the NiO content is 60% of the total mass of the catalyst, the Al 2 o 3 The content is 20% of the total mass of the catalyst, and the content of MgO is 8% of the total mass of the catalyst; the first auxiliary rare earth metal oxide La 2 o 3 The content is 8% of the total mass of the catalyst, the content of the second auxiliary agent basic oxide CaO is 2% of the total mass of the catalyst, and the content of graphite is 2% of the total mass of the catalyst.

[0031] The preparation method of the present embodiment comprises the following steps:

[0032] Step 1, 8.53 grams of active Al 2 o 3 Mixed with 3.41 grams of MgO, roasted in a muffle furnace at a constant temperature of 1000°C for 6 hours to form a magnesium-aluminum spinel structure, and cooled for later use;

[0033] Step 2, take by weighing 99.62 grams of hydrated nickel nitrate Ni (NO 3 ) 2 ·6H 2 O, 7.18 grams of water and lanthan...

Embodiment 2

[0040] The mass percent content of each component of the present embodiment is: the NiO content is 55% of the total mass of the catalyst, the Al 2 o 3 The content is 25% of the total mass of the catalyst, and the content of MgO is 10% of the total mass of the catalyst; the first additive is rare earth metal oxide La 2 o 3 The content is 3% of the total mass of the catalyst and Sm 2 o 3 The content is 3% of the total mass of the catalyst, the content of the second auxiliary agent basic oxide BaO is 2% of the total mass of the catalyst, and the content of graphite is 2% of the total mass of the catalyst.

[0041] The preparation method of the present embodiment comprises the following steps:

[0042] Step 1, 10.66 grams of active Al 2 o 3 Mix it with 4.27 grams of MgO, and roast it in a muffle furnace at a constant temperature of 1000°C for 6 hours to form a magnesium-aluminum spinel structure, and cool it for later use;

[0043] Step 2, take by weighing 91.31 grams of hy...

Embodiment 3

[0050] The mass percentages of each component in this embodiment are: NiO content is 44% of the total mass of the catalyst, Al 2 o 3 The content is 30% of the total mass of the catalyst, and the content of MgO is 15% of the total mass of the catalyst; the first additive is rare earth metal oxide La 2 o 3 The content is 6% of the total mass of the catalyst, the content of the second auxiliary agent basic oxide CaO is 4% of the total mass of the catalyst, and the content of graphite is 1% of the total mass of the catalyst.

[0051] The preparation method of the present embodiment comprises the following steps:

[0052] Step 1, 12.80 grams of active Al 2 o 3 Mix it with 6.40 grams of MgO, roast it in a muffle furnace at a constant temperature of 1000°C for 8 hours to form a magnesium-aluminum spinel structure, and cool it for later use;

[0053] Step 2, take by weighing 73.07 grams of hydrated nickel nitrate Ni (NO 3 ) 2 ·6H 2 O, 5.39 grams of water and lanthanum nitrate ...

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Abstract

The invention discloses a catalyst for the complete methanation of synthesis gas from coal and a preparation method thereof. The catalyst is prepared by using NiO as an active component, one or two of rare earth metal oxides La2O3, CeO2 and Sm2O3 as a first assistant, one of alkali oxides CaO, BaO and SrO as a second assistant, and magnesium aluminate spinel formed by mixing Al2O3 with MgO as a carrier, and the obtained catalyst contains the ingredients in percent by mass as below: 20% to 70% of NiO, 15% to 50% of Al2O3, 6% to 30% of MgO, 5% to 20% of the rare earth metal oxide-type first assistant, 1% to 8% of the alkali oxide-type second assistant and 1% to 3% of graphite; the catalyst provided by the invention has the advantages of high catalytic activity, high mechanical strength, good thermal stability, strong carbon deposition resistance, strong resistance to toxicants in feed gas, excellent low temperature activity and low cost.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, in particular to a catalyst used in the complete methanation of carbon monoxide in coal-to-synthesis gas to synthesize natural gas and a preparation method thereof. Background technique [0002] my country is relatively rich in coal resources. For a long time, coal has occupied a major position in my country's primary energy consumption structure. However, the use of coal often causes a large amount of sulfur oxides, nitrogen oxides and dust pollution. In today's environment where environmental protection is emphasized and energy conservation and emission reduction are advocated, efficient and clean conversion of coal is in line with the clean utilization of coal and the requirements of sustainable development. [0003] Compared with technologies such as coal-to-methanol, coal-to-dimethyl ether, coal direct liquefaction, and coal indirect liquefaction, coal-to-synthetic natural gas...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07C9/04C07C1/04
Inventor 许世森陈亮徐越王保民
Owner HUANENG CLEAN ENERGY RES INST
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