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High-temperature-resistant synthetic natural gas methanation catalyst and preparation method thereof

A technology for methanation catalysts and synthetic natural gas, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effect of improving activity and stabilizing operation

Active Publication Date: 2013-03-06
大连瑞克科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although Chinese patents CN101890353A and CN101920208A are both nickel-based catalysts and can be used at high temperatures, they have yet to be verified by industrial applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 73.2 g Ni(NO 3 ) 2 , 12.52 grams of Cr(NO 3 ) 3 , 9.4 g Mo(NO 3 ) 3 Dissolve in 500 grams of water to make solution A; prepare 2 mol / L sodium carbonate solution B; drop B into A under stirring until pH=10.0, then filter, wash, and dry at 400°C Active ingredient powder obtained after calcination for 3 hours.

[0017] Take 61.2 grams of Al(OH) 3 , 12.9 g Zr(OH) 4 After mixing evenly, calcining at 1000° C. for 5 hours to obtain a catalyst carrier.

[0018] Take 11.9 g La(NO 3 ) 3 , 17.6 g Ca(NO 3 ) 2 Dissolve in an appropriate amount of water, mix the solution with the catalyst active powder and catalyst carrier prepared above, press into tablets, dry, and bake at 600°C for 5 hours to prepare high temperature resistant methanation catalyst sample 1.

[0019] The evaluation results of the methanation reaction of the catalysts are shown in Table 1.

Embodiment 2

[0021] 146.4 g Ni(NO 3 ) 2 , 6.28 grams of Cr(NO 3 ) 3 , 18.8 g Mo(NO 3 ) 3 Dissolve in 800 grams of water to make solution A; prepare 1mol / L sodium hydroxide solution B; drop B into A under stirring until pH=10.0, then filter, wash, dry, and roast at 400°C After 3 hours a powder of the active ingredient was obtained.

[0022] Take 24.5 grams of Al(OH) 3 , 12.9 g Zr(OH) 4 After mixing evenly, calcining at 1100° C. for 5 hours to obtain a catalyst carrier.

[0023] Take 11.9 g La(NO 3 ) 3 , 17.6 g Ca(NO 3 ) 2 Dissolve in an appropriate amount of water, mix the solution with the catalyst active powder and catalyst carrier prepared above, press into tablets, dry, and bake at 600°C for 5 hours to obtain high temperature resistant methanation catalyst sample 2. The evaluation results are shown in Table 1.

Embodiment 3

[0025] 73.2 g Ni(NO 3 ) 2 , 12.9 grams of Cr(NO 3 ) 3 , 9.4 g Mo(NO 3 ) 3 Dissolve in 500 grams of water to make solution A; prepare 2mol / L sodium carbonate solution B; drop B into A under stirring until pH = 10.0, then filter, wash, dry, and roast at 400°C for 3 Obtain active component powder after 1 hour, standby;

[0026] Take 24.5 grams of Al(OH) 3 , 25.8 g Zr(OH) 4 , Take 12 grams of Ti(OH) 3 , 10 grams of SiO 2 After mixing evenly, calcining at 1000° C. for 5 hours to obtain a catalyst carrier for subsequent use;

[0027] Take 11.9 g La(NO 3 ) 3 , 17.6 g Ca(NO 3 ) 2 Dissolve in an appropriate amount of water, mix the solution with the catalyst active powder and catalyst carrier prepared above, press into tablets, dry, and bake at 700°C for 5 hours to obtain high temperature resistant methanation catalyst sample 3. The evaluation results are shown in Table 1.

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Abstract

The invention discloses a high-temperature-resistant synthetic natural gas methanation catalyst and a preparation method thereof, belonging to the fields of catalysts and coal chemical industry. The ingredients of the catalyst comprise active constituents, carriers and stabilizers, wherein the active constituents are Ni and Mo, the carriers are Al2O3, ZrO2, TiO2 and SiO2, and auxiliaries are rare-earth metals and alkaline-earth metals. The preparation method comprises the following steps of: A, preparing the active constituents of a precipitate via the soluble salt solution of the active constituents and a precipitator; B, preparing the high-temperature carriers by means of high-temperature roasting; and C, uniformly mixing the active constituents, the carriers and the auxiliaries, forming by tabletting, and then preparing the high-temperature-resistant methanation catalyst after high-temperature calcining. The catalyst has the characteristics that cheap non-noble metals are used as the active constituents, the high-temperature-resistant materials prepared by mixing and calcining conventional carrier oxides are used as the carriers, and the activity, the selectivity and the high-temperature stability of the catalyst are further improved by adding proper amount of rare-earth metal auxiliaries and alkaline-earth metal auxiliaries, so that the catalyst can stably run for a long time at a high temperature and a high pressure.

Description

technical field [0001] The invention relates to a high-temperature resistant synthetic natural gas methanation catalyst and a preparation method thereof, which belong to the field of catalysts and coal chemical industry. Background technique [0002] The main component of natural gas is methane, which contains almost no harmful substances such as sulfur and nitrogen. It produces less carbon dioxide than other fossil fuels when burned. It is recognized as a green and clean energy source. The main uses of natural gas are: as industrial and civil gas, power generation, vehicle fuel and chemical raw materials. my country's energy structure is characterized by "rich coal, short of oil, and little gas", of which coal accounts for 97.7%, oil 1.6%, and natural gas only 0.7%. The proportion of oil and natural gas is much lower than the world average. [0003] my country is rich in coal resources, and using coal as raw material to produce "synthetic natural gas" (SNG) is an importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C10L3/08
Inventor 周焕文邓少亮乔川曲雪琴
Owner 大连瑞克科技股份有限公司
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