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Monolithic catalyst and use of the monolithic catalyst in natural gas reforming for synthesis gas preparation

An integrated catalyst, natural gas technology, applied in the direction of physical/chemical process catalyst, inorganic chemistry, bulk chemical production, etc., can solve the problems of poor thermal conductivity, poor high temperature stability and chemical stability, easy to break, etc., to enhance heat transfer. , Improve the effect of temperature distribution and uniform temperature distribution

Inactive Publication Date: 2012-08-01
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

General foam materials, such as metal foam, have poor high temperature stability and chemical stability. In addition to poor thermal conductivity, aluminum oxide foam is also prone to damage. Other foam carriers generally have the problems of the above materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 4 integral foam silicon carbide supports with alumina coating (coating weight 8 wt %), first impregnate with (weight concentration 500 g / L) magnesium nitrate solution, 100 o C dried and roasted at 800°C for 4 hours, then impregnated with (weight concentration 250 g / L) nickel nitrate and (weight concentration 30 g / L) lanthanum nitrate solution, 100 o After drying at C, bake at 800 degrees for 4 hours. The process of impregnating nickel nitrate and lanthanum nitrate and then roasting was repeated 5 times to obtain the desired catalyst, wherein the weight percentage of Ni was 8%.

[0017] Wherein the oxide weight percentage of magnesium is 1%, and the oxide weight percentage of lanthanum is 2%.

Embodiment 2

[0019] Take 4 alumina-coated integral foam silicon carbide supports (coating weight 12 wt %), use (weight concentration 40 g / L) rhodium chloride solution impregnation, 100 o After drying, bake at 800°C for 4h. Repeat this impregnation and roasting process 5 times to obtain the desired catalyst, wherein the weight percentage of Rh is 1%.

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PUM

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Abstract

The invention discloses a monolithic catalyst for natural gas catalytic conversion for synthesis gas preparation. The monolithic catalyst is characterized in that whole foam silicon carbide is utilized as a carrier; the carrier has a three-dimensional communicated-aperture channel structure having open aperture sizes of 0.1 to 6mm and carries at least one of Ni and Rh; and the content of an active metal component is in a range of 0.1 to 25wt%. The monolithic catalyst can convert natural gas, steam and oxygen into synthesis gas so that the temperature distribution of catalyst bed layers is more uniform.

Description

technical field [0001] The invention relates to an integral catalyst for producing synthesis gas by catalytic conversion of natural gas. The catalyst is suitable for reaction processes requiring enhanced heat transfer. Background technique [0002] In the catalytic partial oxidation of natural gas to synthesis gas, if the heat transfer of the reaction system, especially the catalyst carrier, is poor, it is easy to cause local areas, such as oxygen and methane gas flow contacting the reaction area, to generate too much heat and dissipate too slowly, resulting in extremely high local temperatures , form a hot spot, similarly, in the natural gas and water vapor reaction area, the heat supply is insufficient to form a cold spot, the hot spot can easily lead to catalyst deactivation, and the cold spot can reduce the reaction activity. Due to the poor performance of traditional packed bed granular catalysts in terms of heat and mass transfer, it is necessary to develop and utiliz...

Claims

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Application Information

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IPC IPC(8): B01J27/224C01B3/40
CPCY02P20/52
Inventor 李春林徐恒泳侯守福
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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