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CO methanation catalyst and preparation method thereof

A methanation catalyst and catalyst technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of reducing hydrogen production efficiency and loss, and achieve the effects of long service life, stable performance, high CO selectivity and conversion rate

Inactive Publication Date: 2020-08-14
郑州帅先新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the 20-24vol% CO contained in the reformed gas 2 , while the methanation catalyst has high activity, it also needs to have high selectivity to CO, otherwise it will be affected by a large amount of CO 2 A large amount of H is lost through methanation 2 , reducing the efficiency of hydrogen production

Method used

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  • CO methanation catalyst and preparation method thereof
  • CO methanation catalyst and preparation method thereof
  • CO methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a method for preparing a CO methanation catalyst, which includes the following steps:

[0047] 1. Take 1000g CeO 2 Carrier, dried at 120°C for 2h, cooled to room temperature for later use, wherein, CeO 2 The particle size of the carrier is 30mm, and the specific surface area is 35m 2 / g;

[0048] 2. Weigh 103.6g nickel chloride hexahydrate, 444.5g nickel nitrate hexahydrate and add water to prepare 1L mixed solution;

[0049] 3. Dry 1000g of CeO 2 The carrier is immersed in the mixed solution, aged for 2 hours, and dried at 120°C for 6 hours;

[0050] 4. The impregnated and dried CeO 2 The carrier was baked in a muffle furnace at 400 °C for 2 h, and then heated in H 2 Reduction at 250°C for 2 hours in the atmosphere, and cooling down to room temperature to obtain CO methanation catalyst A.

[0051] The molar ratio of the main component of CO methanation catalyst A is Ni:Cl obtained by elemental analysis - :CeO 2 = 32.3:12.1:100.0.

Embodiment 2

[0053] This embodiment provides a method for preparing a CO methanation catalyst, which includes the following steps:

[0054] 1. Take 5000g of cerium nitrate, roast it in a muffle furnace at 400°C for 2h, and lower it to room temperature to obtain CeO 2 The carrier is ready for use, and the resulting CeO 2 The particle size of the carrier is 20mm, and the specific surface area is 60m 2 / g;

[0055] 2. Weigh 103.6g nickel chloride hexahydrate, 444.5g nickel nitrate hexahydrate plus ethanol to prepare 1L mixed solution;

[0056] 3. Dry 1000g of CeO 2 The carrier is immersed in the mixed solution, aged for 2 hours, and dried at 150°C for 4 hours;

[0057] 4. The impregnated and dried CeO 2 The carrier was baked in a muffle furnace at 400 °C for 2 h, and then heated in 10 vol% H 2 / 90vol%N 2 Reduction at 250° C. for 2 h in air flow, and cooling down to room temperature to obtain CO methanation catalyst B.

[0058] The molar ratio of the main component of CO methanation ca...

Embodiment 3

[0060] This embodiment provides a method for preparing a CO methanation catalyst, which includes the following steps:

[0061] 1. Take 1000g CeO 2 Carrier, dried at 120°C for 2h, cooled to room temperature for later use, wherein, CeO 2 The particle size of the carrier is 30mm, and the specific surface area is 35m 2 / g;

[0062] 2. Weigh 618.2g nickel nitrate hexahydrate, 46.6g ammonium chloride plus acetone to prepare 1L mixed solution;

[0063] 3. Dry 1000g of CeO 2 The carrier is immersed in the mixed solution, aged for 2 hours, and dried at 100°C for 10 hours;

[0064] 4. The impregnated and dried CeO 2 The carrier was baked in a muffle furnace at 400 °C for 2 h, and then heated in H 2 Reduction at 300°C for 2h in the atmosphere, and cooling down to room temperature to obtain CO methanation catalyst C.

[0065] The molar ratio of the main components contained in the CO methanation catalyst C obtained by elemental analysis is Ni:Cl - :CeO 2 =35.2:12.6:100.0.

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Abstract

The invention provides a CO methanation catalyst and a preparation method thereof. The catalyst comprises an active component Ni, a carrier CeO2, and an assistant CeOCl; Ni exists in the form of a metal elementary substance, Cl <-> in the CeOCl is distributed on the surface of the carrier, the content of the Ni is 5-20wt% based on the total mass of the catalyst being 100%, and the molar ratio of the Cl <-> in the CeOCl to CeO2 is 0.05-0.5. The invention also provides a preparation method of the CO methanation catalyst. The method comprises the following steps: immersing CeO2 in a nickel salt and chloride mixed solution, carrying out roasting and reducing to obtain the CO methanation catalyst. The CO methanation catalyst provided by the invention has relatively high CO selectivity and conversion rate, and is wide in applicable operating temperature range, high in air speed, stable in performance, high in repeatability and long in service life.

Description

technical field [0001] The invention relates to the field of methanation catalysts, in particular to a CO methanation catalyst and a preparation method thereof. Background technique [0002] Fuel cell is a new high-efficiency electrochemical power device in recent years. It has high power generation efficiency, stable operation, no noise, clean and environmental protection, and has broad application prospects in transportation, construction, military, communication and other fields. There are many types of fuel cells and various technical routes. Among them, proton exchange membrane fuel cells have become the mainstream in small and medium-sized fixed power supplies, electric transportation and other industries due to their advantages such as high power density, low operating temperature, good start-up performance, and relatively mature technology. The development has enabled it to occupy a major share of about 90% of the fuel cell market. However, with the continuous adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90
CPCH01M4/9016H01M4/8882H01M4/8652Y02E60/50
Inventor 赵鸿新
Owner 郑州帅先新能源科技有限公司