Completely-methanated catalyst as well as preparation method and application thereof

A complete methanation and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of insufficient stability and no long-term industrial application test, etc., to improve activity And high temperature hydrothermal stability, wide activity temperature range, good stability

Active Publication Date: 2013-05-01
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN102091631A uses multiple impregnation methods to prepare a methanation catalyst for the production of synthetic natural gas

Method used

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  • Completely-methanated catalyst as well as preparation method and application thereof
  • Completely-methanated catalyst as well as preparation method and application thereof
  • Completely-methanated catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] This example is used to illustrate the preparation method of the complete methanation catalyst provided by the present invention.

[0071] (1) Weigh 53.5090 grams of Ni (NO 3 ) 2 ·6H 2 O, 7.3612 g La(NO 3 ) 3 ·6H 2 O, 13.7352 g Zr(NO 3 ) 4 ·5H 2 O and 4.5548 g Ca(NO 3 ) 2 4H 2 O was dissolved in 300ml deionized water at 60°C to obtain solution I;

[0072] Weigh 31.5950 g Na 2 CO 3 and 8.8376 g NaHCO 3 , dissolved in 300ml of deionized water at 60°C to obtain solution II; weigh 25.6760g of Na 2 CO 3 and 7.1820 g NaHCO3 , dissolved in 300ml of deionized water at 60°C to obtain solution II'.

[0073] Weigh 71.2747 grams of Al(NO 3 ) 3 9H 2 O was dissolved in 300ml of deionized water at 60°C to obtain solution III.

[0074] (2) Slowly add solution I to solution II and stir for 1 hour to obtain precipitation system I;

[0075] Add solution II' slowly to solution III and stir for 1 h to obtain precipitation system II.

[0076] (3) Add Precipitation Syste...

Embodiment 2

[0089] This example is used to investigate the influence of the first promoter and the second promoter on the stability of the catalyst, and the method of Example 1 is used to prepare catalysts with different compositions.

[0090] (1) Weigh 43.6215 grams of Ni (NO 3 ) 2 ·6H 2 O, 12.0183 grams of Zr(NO 3 ) 4 ·5H 2 O and 4.5548 g Ca(NO 3 ) 2 4H 2 O was dissolved in 300ml of deionized water at 60°C to obtain solution I;

[0091] Weigh 25.5139 g Na 2 CO 3 and 7.1366 g NaHCO 3 , dissolved in 300ml deionized water at 60°C to obtain solution II;

[0092] Weigh 25.6760 g Na 2 CO 3 and 7.1820 g NaHCO 3 , dissolved in 300ml of deionized water at 60°C to obtain solution Ⅱ′;

[0093] Weigh 71.2747 grams of Al(NO 3 ) 3 9H 2 O was dissolved in 300ml of deionized water at 60°C to obtain solution III.

[0094] (2) Slowly add solution I to solution II and stir for 1 hour to obtain precipitation system I;

[0095] Slowly add solution III to solution II' and stir for 1 h to ...

Embodiment 3

[0099] This example is used to investigate the influence of the first promoter and the second promoter on the stability of the catalyst, and the method of Example 1 is used to prepare catalysts with different compositions.

[0100] (1) Weigh 40.7134 grams of Ni (NO 3 ) 2 ·6H 2 O, 6.0621 g La(NO 3 ) 3 ·6H 2 O and 4.5548 g Ca(NO 3 ) 2 4H 2 O was dissolved in 300ml of deionized water at 60°C to obtain solution I;

[0101] Weigh 21.4598 g Na 2 CO 3 and 6.0026 g NaHCO 3 , dissolved in 300ml of deionized water at 60°C to obtain solution II;

[0102] Weigh 25.6760 g Na 2 CO 3 and 7.1820 g NaHCO 3 , dissolved in 300ml deionized water at 60°C to obtain solution Ⅱ′;

[0103] Weigh 71.2747 grams of Al(NO 3 ) 3 9H 2 O was dissolved in 300ml deionized water at 60°C to obtain solution III.

[0104] (2) Slowly add solution I to solution II and stir for 1 hour to obtain precipitation system I;

[0105] Slowly add solution III to solution II' and stir for 1 h to obtain precip...

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Abstract

The invention provides a completely-methanated catalyst as well as a preparation method and an application thereof. The preparation method comprises the following steps of: respectively mixing precursors of an active component, a first auxiliary agent and a second auxiliary agent and dissolving into water to prepare a solution I; adding a precipitating agent into water to be dissolved to respectively prepare a solution II and a solution II'; adding a precursor of a carrier into the water to be dissolved to prepare a solution III or a solution III'; adding the solution I into the solution II to carry out precipitation to obtain a precipitating system I; adding the solution II' into the solution III to carry out the precipitation to obtain a precipitating system II or adding an acidic solution into the solution III' to peptize to obtain the precipitating system II; and then mixing the precipitating system I with the precipitating system II. According to the completely-methanated catalyst as well as the preparation method and the application thereof, the catalyst is prepared by applying a sub-step reverse precipitating method; and the catalyst has the characteristics of high activity and high safety and is suitable for being applied to a high-temperature or low-temperature completely-methanated reaction process for synthesizing natural gas by coal gasification through methanation.

Description

technical field [0001] The invention relates to a complete methanation catalyst and its preparation method and application, especially a complete methanation catalyst for producing coal-based synthetic natural gas, its preparation method and application, and belongs to the field of catalyst chemistry and new coal chemical energy of coal-based synthetic natural gas . Background technique [0002] The sustainable development of my country's environment, ecology and society has an increasing demand for clean energy utilization, especially in recent years, the market demand for natural gas has been increasing at a relatively high speed. It is predicted that by 2020, my country's natural gas market demand will reach 4500 billion cubic meters, the market gap is 250 billion cubic meters, and the degree of external dependence will reach 50%. At the same time, the current situation of my country's rich coal and low gas resources makes the clean utilization of coal more and more urgen...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J37/03C10L3/08
Inventor 李春启梅长松周帅林陈爱平段世慈陈元应李德炳
Owner DATANG INT CHEM TECH RESINST
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