Methanation catalyst for removing trace amounts of oxycarbide

A methanation catalyst and carbon oxide technology are applied in the field of catalysts for methanation reaction of carbon oxides and the field of preparation thereof, which can solve the problems of not mentioning hydrotreating catalysts and the like, and achieve high anti-poisoning ability and thermal stability, Effects of high and low temperature activity and stability

Active Publication Date: 2009-01-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no mention in the above documents that the involved hydrofinishing catalyst can be used to catalyze the methanation reaction of carbon oxides

Method used

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  • Methanation catalyst for removing trace amounts of oxycarbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Ni-W / TiO 2

[0044] Weigh the titanium dioxide (TiO 2 ) 100 grams of carrier, denoted as A.

[0045] 125 grams of nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], 1.7 grams of ammonium metatungstate [(NH 4 ) 6 h 2 W 12 o 40 ·xH 2 O] Dissolved with deionized water to form a 200ml mixed aqueous solution, dipped into A. Bake at 110°C for 5 hours to obtain B.

[0046] Decompose B in an air atmosphere at 300° C. and 450° C. for 2 hours each by using a temperature-programmed heating decomposition method to obtain a catalyst containing 20% ​​by weight of nickel and 1.0% by weight of tungsten.

Embodiment 2

[0047] Embodiment 2Ni-W-Y / Al 2 o 3

[0048] Weigh the alumina (γ-Al 2 o 3 ) 100 grams of carrier, denoted as A.

[0049] 126 grams of nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], 1.7 grams of ammonium metatungstate [(NH 4 ) 6 h 2 W 12 o 40 ·xH 2 O] and 2.7 g of yttrium nitrate [YNO 3 ·6H 2 O] Dissolved with deionized water and configured to form a 200ml mixed aqueous solution, and dipped it into A. Bake at 110°C for 5 hours to obtain B.

[0050] Decompose B in an air atmosphere at 300° C. and 450° C. for 2 hours each by temperature-programmed thermal decomposition method to obtain a catalyst containing 20% ​​by weight of nickel, 1.0% by weight of tungsten, and 0.5% by weight of yttrium.

Embodiment 3

[0051] Embodiment 3Ni-W-La / Al 2 o 3

[0052] Weigh the alumina (γ-Al 2 o 3 ) 100 grams of carrier, denoted as A.

[0053] 169 grams of nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], 1.8 grams of ammonium metatungstate [(NH 4 ) 6 h 2 W 12 o 40 ·xH 2 O] and 2.1 grams of lanthanum nitrate [La(NO 3 ) 3 ·6H 2 O] Dissolved with deionized water and configured as a 200ml mixed aqueous solution, impregnated on the calcined carrier A.

[0054] The steps of drying and roasting are the same as in Example 2, and the obtained catalyst (weight %) contains 25% nickel, 1.0% tungsten, and 0.5% lanthanum.

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Abstract

The invention discloses a methanation catalyst of carbon oxides containing nickel, the methanation catalyst contains active components of a) nickel oxide, b) tungsten oxide and/or molybdenum oxide, and c) at least one active component which is selected from alkali metal oxides, alkaline earth metal oxides and rare earth metal oxides which are loaded on a carrier of the oxides, and the carrier of the oxides is aluminium oxide, silicon oxide, titanium oxide, zirconium oxide or the mixture thereof. The catalyst of the invention has very high activity at low temperature, high anti-poisoning capacity and thermal stability and broad application prospect.

Description

technical field [0001] The present invention relates to a kind of methanation catalyst and its preparation method and application, specifically, relate to a kind of carbon oxide (comprising CO, CO 2 ) Catalyst for methanation reaction, preparation method and application thereof. Background technique [0002] Domestically used methanation catalysts are mainly used in ethylene plants and ammonia plants. Specifically, in the ethylene plant, the methanation reaction unit is before the carbon 2 and carbon 3 hydrogenation units, and provides hydrogenation hydrogen sources that meet the process requirements for the latter two reaction units; while in the ammonia synthesis unit, the methanation unit is also The last step in the entire feed gas purification process. The methanation reaction of carbon oxides, that is, the carbon oxides in a hydrogen-rich process gas (such as less than 0.4%) are hydrogenated to CH 4 and H 2 The O form is removed. The role of the methanation cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C01B3/58
Inventor 王翀王秀玲王红亚戴伟
Owner CHINA PETROLEUM & CHEM CORP
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