Nickel iron bimetallic methanation catalyst and preparation and application thereof

A methanation catalyst and catalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve low-selectivity, pure nickel-based methanation catalyst Low activity and other problems, to achieve the effect of reducing the deactivation rate, reducing the metal loading, and saving costs

Active Publication Date: 2014-12-17
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Pure nickel-based methanation catalysts have low activity and low selectivity in the low temperature range

Method used

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  • Nickel iron bimetallic methanation catalyst and preparation and application thereof
  • Nickel iron bimetallic methanation catalyst and preparation and application thereof
  • Nickel iron bimetallic methanation catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Pseudoboehmite powder was added with 2% acetic acid solution, kneaded, extruded, dried in the air, and roasted in a muffle furnace at 500°C for 5 hours to obtain a carrier;

[0022] The nickel nitrate solution is impregnated on the carrier according to the proportion of 5wt% Ni, and left to stand for 10 minutes; the ferric nitrate solution prepared is impregnated on the above-mentioned nickel-containing carrier according to the proportion of 5wt% Fe, and left standing in the air for 24 hours, Until it is dry, it is dried in an oven at 80°C for 60 minutes; finally, it is calcined in a muffle furnace at 500°C for 5 hours to obtain catalyst No. 1.

Embodiment 2

[0039] Pseudo-boehmite powder was added with 2% acetic acid solution, kneaded, extruded, dried in the air, and calcined in a muffle furnace at 500°C for 5 hours to obtain an alumina carrier;

[0040] Immerse the magnesium nitrate solution according to the ratio on the carrier and let it stand for 10 minutes; dry it in an oven at 80-120°C for 60 minutes; bake it in a muffle furnace at 500°C for 2 hours to obtain a carrier containing 3wt% magnesium ;

[0041] The nickel nitrate solution is equally impregnated on the magnesium-containing carrier according to the proportion of 5wt% Ni, and left to stand for 10 minutes; the ferric nitrate solution prepared is excessively impregnated on the above-mentioned nickel-containing carrier according to the proportion of 5wt% Fe, and left to stand for 24 Hours, until dry, then dry in an oven at 80°C for 60 minutes; finally bake in a muffle furnace at 500°C for 5 hours to prepare catalyst No. 5.

Embodiment 3

[0043] Pseudo-boehmite powder was added with 2% acetic acid solution, kneaded, extruded, dried in the air, and calcined in a muffle furnace at 500°C for 5 hours to obtain an alumina carrier;

[0044] Immerse the lanthanum nitrate solution according to the proportion on the alumina carrier, and let it stand for 10 minutes; dry it in an oven at 80-120°C for 60 minutes; bake it in a muffle furnace at 500°C for 2 hours to obtain a lanthanum-containing 3wt% a;

[0045] The nickel nitrate solution is equally impregnated on the lanthanum-containing carrier according to the proportion of 5wt% Ni, and left to stand for 10 minutes; Let stand for 24 hours until dry, then dry in an oven at 80°C for 60 minutes; finally bake in a muffle furnace at 500°C for 5 hours to prepare catalyst No. 6.

[0046] Take No. 1, No. 5 and No. 6 catalysts, crush them, sieve out 20-40 mesh particles, measure 1ml, about 0.65-0.7g, and put them into the reactor for methanation reaction evaluation. Before the ...

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Abstract

The invention relates to a nickel iron bimetallic methanation catalyst and preparation and application thereof; according to the ratio of 0.7-1ml of a soluble salt solution to 1g of an alumina carrier, the prepared soluble salt solution is immersed on the carrier; according to the ratio of 0.7-1ml of a soluble nickel salt solution to 1g of an additive-containing carrier, the soluble nickel salt solution is immersed on the carrier to obtain a nickel containing carrier; according to the ratio of 0.7-1ml of a soluble iron salt solution to 1g of the nickel containing carrier, the soluble iron salt solution is immersed on the nickel containing carrier for drying and roasting to obtain the catalyst; nickel oxide is 2.5-10wt%; iron oxide is 2.5-10wt%; an additive is 0.01-5wt%; the additive is at least one substance from lanthanum, cerium, barium and magnesium; the catalyst greatly improves low temperature methanation activity of the catalyst, decreases the cost of the catalyst, improves methane selectivity of the catalyst, and increases the stability of the catalyst.

Description

technical field [0001] The invention relates to a low-cost, high-activity, high-selectivity methanation reaction catalyst and a preparation method thereof. The catalyst can be applied to methanation reactions in hydrogen production units, ammonia synthesis units, and coal-to-natural gas units, and provides a catalyst technology for the complete conversion of a small amount of CO in hydrogen-rich gas to produce methane. Background technique [0002] The methanation reaction equation is as follows: [0003] CO+3H 2 =CH 4 +H 2 O (ΔH 0 298 =-206kJ / mol) [0004] This reaction is widely used in hydrogen purification in hydrogen production units and ammonia synthesis units, that is, to reduce CO in hydrogen to below 20 ppm through methanation reaction. The methanation reaction can also be applied to coal-to-gas conversion of stoichiometric synthesis gas into substitute natural gas (SNG). Industrially used methanation catalysts are generally nickel-based catalysts, and the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/83C07C9/04C07C1/04B01J37/02
Inventor 张天釜田志坚阎立军曲炜孔繁华王从新迟克彬沈宜泓朱晓晓庞新梅李发永
Owner PETROCHINA CO LTD
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