High selectivity carbon dioxide methanation catalyst and preparation method and application thereof

A technology of methanation catalyst and carbon dioxide, which is applied in the field of high-selectivity carbon dioxide methanation catalyst and its preparation, can solve problems such as unconsciousness, affecting the personal safety of astronauts, and slow movement of the human body, so as to improve thermal stability and inhibit aggregation Effect

Active Publication Date: 2014-11-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And if the carbon monoxide concentration reaches 10ppm in the crew cabin, after 10 minutes, the human body will be ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh Ce(NO 3 ) 3 .6H 2 O and Zr(NO 3 ) 4 .5H 2 O each 26.05g and 103.04g, dissolve it in 3000ml deionized water, and then add 216.22g of urea; place it in an oil bath, heat while stirring, when the color of the solution becomes turbid, add another urea at this temperature Stir for 2 hours; then, cool, filter, and dry overnight; bake at 500 °C for 2 hours to obtain Ce 0.2 Zr 0.8 o 2 The Ce-Zr composite oxide carrier; the other ratio Ce-Zr composite oxide carrier, the preparation method is the same as above.

[0037] Thorough grinding of Ce after calcination at 500 °C for 2 h 0.2 Zr 0.8 o 2 The carrier powder is passed through a 200-mesh separating sieve; compressed into tablets at 10 MPa; pulverized, sieved, and 12-20-mesh granules are taken for later use.

[0038] Take 0.75g Ru(CO) 5 and 1.24g La(NO 3 ) 3 Dissolve in 2.7mL distilled water. The mixed aqueous solution was impregnated to 8.3g Ce by equal volume impregnation method. 0.2 Zr 0.8 o 2 On the ...

Embodiment 2

[0041] Thorough grinding of Ce after calcination at 450 °C for 4 h 0.8 Zr 0.2 o 2 The carrier powder is passed through a 200-mesh separating sieve; compressed into tablets at 15 MPa; crushed, sieved, and 12-20-mesh granules are taken for later use.

[0042] Take 1.32gRh (NO 3 ) 3 , 0.38g Pt(NH 3 ) 2 (NO 2 ) 2 and 0.85g La(NO 3 ) 3 Dissolve in 2.5mL distilled water. Impregnate this mixed aqueous solution to 6.8g Ce by equal volume impregnation method 0.8 Zr 0.2 o 2 On the carrier, immerse at room temperature for 12 hours to make it fully absorbed. The obtained sample was dried in an oven at 120°C for 24 hours. After drying, the sample was placed in a muffle furnace, heated to 550°C at a heating rate of 2°C / min, calcined for 3 hours, and naturally cooled to room temperature in the muffle furnace. Then it was reduced with 2% hydrazine hydrate aqueous solution at room temperature for 12 hours, and then washed 6 times with water. Finally, the catalyst sample was drie...

Embodiment 3

[0045] Ce 0.5 Zr 0.5 o 2 Powder, passed through a 200-mesh separating sieve; compressed into tablets at 10 MPa; pulverized, sieved, and 30-40-mesh granules were taken for later use.

[0046] Take 0.82g Ru 3 (CO) 12 and 3.12gMg(NO 3 ) 2 Dissolve in 3.4mL deionized water. Using the equal volume impregnation method, impregnate this mixed aqueous solution to 6.8g Ce 0.5 Zr 0.5 o 2 On the carrier, immerse at room temperature for 10 hours to make it fully absorbed. The obtained sample was dried in an oven at 120°C for 12 hours. After drying, the sample was placed in a muffle furnace, heated to 550°C at a heating rate of 2°C / min, calcined for 3 hours, and naturally cooled to room temperature in the muffle furnace. Then place it in a hydrogen stream at 400°C for 5 hours to make a carbon dioxide methanation catalyst 5%Ru3%MgO / Ce 0.5 Zr 0.5 o 2 .

[0047] At a pressure of 0.1MPa, a temperature of 300°C, and a volumetric space velocity of the feed gas of 20,000h -1 、H 2 / ...

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Abstract

The invention provides a high selectivity carbon dioxide methanation catalyst and a preparation method and application thereof, the catalyst comprises active components, auxiliary agents and a carrier; noble metal Ru or Rh is used as a main catalytic active component, one or a plurality of elements selected from I and II main group and II, III and VII sub group are used as the auxiliary agents, and Ce-Zr oxide in a certain proportion is used as the carrier. The high selectivity carbon dioxide methanation catalyst is used in the manner of particles or coating (wall loading) of the carrier, the auxiliary agents and the active components on to an overall structure catalyst or a metal honeycomb. The catalyst has high activity and high selectivity of methanation, no CO content and the like, the catalyst can be applied to hydrogenation methanation removal of CO2 in a space station, can be applied to the process of natural gas production from coal, process gas CO2 conversion and utilization process and the like, and can realize the new energy development and energy saving and emission reduction.

Description

technical field [0001] The invention belongs to the field of catalyst and aerospace technology, and in particular relates to a high-selectivity carbon dioxide methanation catalyst and its preparation method and application. Background technique [0002] Long endurance and multi-crew manned space flight and deep space exploration are the inevitable trend of future space development. In order to achieve this goal, a large number of key technologies must be solved, among which the development of environmental control and life support system (Environmental Control and Life Support system, referred to as environmental control and life support system) bears the brunt. It needs to provide basic life support materials such as food, oxygen and water for astronauts. [0003] The atmospheric regeneration technology of the environmental control and life support system is to collect and concentrate the carbon dioxide produced by the metabolism of the astronauts in the cockpit. The colle...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J23/46C07C9/04C07C1/12
Inventor 王树东李涛王胜高典楠王岩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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