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High-temperature-resistant methanation catalyst and preparation method thereof

A methanation catalyst, high temperature resistant technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Large-scale production, consumption of large organometallic solvents, etc., to achieve the effect of weakening the surface tension of the liquid, small grain size, and improving the anti-carbon performance.

Active Publication Date: 2015-09-16
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents CN101306361A and CN101152629A disclose a method for preparing hexaaluminate by inverse microemulsion method, wherein the hexaaluminate carrier prepared by inverse microemulsion method combined with supercritical drying method has stable performance and has a large specific surface area and excellent anti-coking properties, but this method will consume a large amount of expensive organic metal solvents in the process of preparing the catalyst, and the operating conditions of supercritical drying are harsh, which is not conducive to the large-scale production of the catalyst; CN102674413A and CN102836718 disclose a A method for preparing a methanation catalyst prepared by using a hexaaluminate carrier; the catalyst prepared by the sol-gel method has poorer dispersibility than the precipitation method, and the cycle of sol and gel is longer, the specific surface area of ​​the catalyst is smaller, and the anti-carbon deposition performance is poor

Method used

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  • High-temperature-resistant methanation catalyst and preparation method thereof
  • High-temperature-resistant methanation catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment includes the following steps:

[0022] A. Preparation of barium hexaaluminate carrier:

[0023] 90.03gAl(NO 3 ) 3 9H 2 O and 5.23g Ba(NO 3 ) 2 Dissolved in 400ml deionized water to form salt solution I, 30.7g (NH 4 ) 2 CO 3 Dissolve in 400ml ice-water bath to form alkali solution II, control 200ml mother liquor constant temperature water bath at 70°C, gradually add salt solution I and alkali solution II to the constantly stirring mother liquor for co-precipitation reaction, and maintain the mother liquor pH value at 7.5; after the precipitation reaction, age at 90°C for 2 hours under microwave conditions, wash the precursor solution with deionized water to remove excess ammonium salt; after suction filtration, dry the filter cake at 80°C for 1 hour under microwave radiation conditions, and roast at 450°C 4h, roast at 1300°C for 4h, cool to room temperature for later use. B. Introduction of active components:

[0024] 341.93Ni(NO) 3 ·6H 2 O an...

Embodiment 2

[0034] This embodiment includes the following steps:

[0035] A. Preparation of barium hexaaluminate carrier:

[0036] 90.03g Al(NO 3 ) 3 9H 2 O and 7.84g Ba(NO 3 ) 2 Dissolved in 400ml deionized water to form salt solution I, 32.67g (NH 4 ) 2 CO 3 Dissolve in 400ml ice-water bath to form alkaline solution II, control 200ml mother liquor constant temperature water bath at 80°C, gradually add salt solution I and alkali solution II to the constantly stirring mother liquor for co-precipitation reaction, and maintain the pH value of the mother liquor at 7.5; after the precipitation reaction, age at 90°C for 2h under microwave conditions, wash the precursor solution with deionized water to remove excess ammonium salt; after suction filtration, dry the filter cake at 80°C for 2h under microwave radiation, and roast at 500°C for 4h , 1300 ° C roasting 4h, cooled to room temperature for later use.

[0037] B. Introduction of active components:

[0038] 372.02gNi(NO) 3 ·6H ...

Embodiment 3

[0048] This embodiment includes the following steps:

[0049] A. Preparation of barium hexaaluminate carrier:

[0050] 90.03g Al(NO 3 ) 3 9H 2 O and 10.45g Ba(NO 3 ) 2 Dissolved in 400ml deionized water to form salt solution Ⅰ, 27.82g NH 4 HCO 3 Dissolve in 400ml ice-water bath to form alkali solution II, control 200ml mother liquor constant temperature water bath at 70°C, gradually add salt solution I and alkali solution II to the constantly stirring mother liquor for co-precipitation reaction, and maintain the mother liquor pH value at 7.5; after the precipitation reaction, age at 90°C for 2 hours under microwave conditions, wash the precursor solution with deionized water to remove excess ammonium salt; after suction filtration, dry the filter cake at 80°C for 2h under microwave radiation conditions, and roast at 600°C 2h, roast at 1200°C for 2h, cool to room temperature for later use.

[0051] B. Introduction of active components:

[0052] 402.11gNi(NO) 3 ·6H 2 ...

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Abstract

The invention relates to a high-temperature-resistant methanation catalyst and a preparation method thereof. The preparation method comprises the following steps: by taking nickel as a main active ingredient, hexa-aluminate barium as a carrier and rare earth metals as a cocatalyst, preparing a hexa-aluminate barium carrier by virtue of a precipitation method combined with a microwave drying technology; then introducing an active ingredient nickel oxide to prepare a catalyst semi-finished product; then adding anti-sintering components such as kaolin, potassium carbonate, alkaline-earth metals and the like; and finally adding calcium aluminate cement and mixing, roasting and grinding the mixture together and slicing and forming the mixture to prepare the methanation catalyst. The methanation catalyst comprises the following components in percentage by mass: 5-15% of NiO, 5-30% of SiO2, 2-30% of BaO, 7-12% of K2CO3, 5-30% of CaO, 0.5-5% of La2O3, 5-15% of MgO and 30-65% of Al2O3. The methanation catalyst maintains relatively good methanation activity in a using temperature range form 300 DEG C to 700 DEG C and has good stability and anti-carbon performance.

Description

technical field [0001] The invention belongs to the technical field of coal-to-synthesis gas to natural gas, in particular to a preparation method of a high-temperature-resistant methanation catalyst. Background technique [0002] As an efficient, safe and clean fossil energy, the proportion of natural gas in global energy consumption is increasing year by year; with the enhancement of people's awareness of environmental protection and the improvement of quality of life, especially the aggravation of smog in my country, the demand for natural gas is increasing year by year increase. However, my country's energy structure is "rich in coal, short of oil, and low in gas". Using relatively abundant coal resources to develop coal-based natural gas can not only make up for the shortage of natural gas resources in my country, reduce the gap between my country's natural gas supply and demand, but also contribute to the realization of oil and gas resources. Diversification, energy sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C10L3/08
Inventor 王晓龙何忠郜时旺肖天存冯向程
Owner HUANENG CLEAN ENERGY RES INST
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