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Catalyst in use for preparing hydrogen through reforming oxidized methyl alcohol, and preparation method

A catalyst, methanol technology, applied in the field of chemical catalyst preparation, can solve the problem of large amount of noble metal Pd, etc., to achieve good catalytic activity, excellent thermal stability, excellent long life effect

Inactive Publication Date: 2007-10-10
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

In the 1990s, PEMFC technology achieved rapid development and gradually entered the stage of commercialization, but hydrogen source technology has become a bottleneck for the practical application of fuel cells
Haga (US 2001 / 0016188 AL), Kaneko (US 2001 / 021469 A), Pd-ZnO supported on Cu / ZnO or Pd-ZnO supported on CeZr / CuZn, applied to methanol oxidation reforming hydrogen production reaction, reforming The CO content in the gas is 1.3-2.0%, but the amount of noble metal Pd is large (5g / l cat )

Method used

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  • Catalyst in use for preparing hydrogen through reforming oxidized methyl alcohol, and preparation method
  • Catalyst in use for preparing hydrogen through reforming oxidized methyl alcohol, and preparation method
  • Catalyst in use for preparing hydrogen through reforming oxidized methyl alcohol, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 27g Al 2 o 3 ·H 2 O, 35g Al(OH) 3 , 6g Al(NO 3 ) 3 9H 2 O, 45g γ-Al 2o 3 , add 300ml H 2 O, with HNO 3 Adjust pH=3~4, and prepare Al with a thickness of 1~10μm by mixing mechanical ball milling 2 o 3 Latex slurry, use this slurry to coat cordierite honeycomb ceramics (62 holes / cm 2 ), dried at 120°C for 6 hours, and calcined at 500°C for 4 hours to prepare a carrier layer.

[0026] Take 17.42g Zr(NO 3 ) 4 ·5H 2 O, 37.82g Ce(NO 3 ) 3 ·6H 2 O is made into a mixed aqueous solution with a concentration of 0.2g / ml, and the Al 2 o 3 The honeycomb ceramic body of the carrier coating is immersed in the solution until saturated, taken out, air-dried naturally, and calcined at 500°C for 4 hours to prepare the composite auxiliary agent.

[0027] Take 1.97g Cr(NO 3 )3·9H 2 O, 52.07g Zn(NO 3 ) 2 ·6H 2 O was formulated into a mixed aqueous solution with a concentration of 0.3 g / ml, impregnated with the prepared carrier layer and composite auxiliary agen...

Embodiment 2

[0029] The preparation of the carrier layer and the composite auxiliary agent layer is the same as in Example 1.

[0030] Take 3.95g Cr(NO 3 ) 3 9H 2 O, 49.33g Zn(NO 3 ) 2 ·6H 2 O, make a mixed aqueous solution with a concentration of 0.3g / ml, impregnate the carrier layer and the composite auxiliary agent layer to saturation, air-dry naturally, and roast at 500°C for 4 hours to prepare the catalyst. The total amount of active components, additives and washcoat in the catalyst was 195 g / L.

Embodiment 3

[0032] The preparation of the carrier layer and the composite auxiliary agent layer is the same as in Example 1.

[0033] Take 7.9g Cr(NO 3 ) 3 9H 2 O, 43.84g Zn(NO 3 ) 2 ·6H 2 O, prepare a mixed aqueous solution with a concentration of 0.3 g / ml, impregnate the carrier layer and the composite auxiliary agent layer to saturation, air-dry naturally, and roast at 500° C. for 4 hours to prepare the catalyst. The total amount of active components, additives and washcoat in the catalyst was 170 g / L.

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Abstract

A catalyst for preparing H2 from methanol by reforming and oxidizing is composed of a coated transition layer and the multi-element oxide of non-noble metals which are coated or dipped on said transition layer. Its advantages are high conversion rate (100%) and high selectivity to H2 (93.8%).

Description

technical field [0001] The invention belongs to the technical field of chemical catalyst preparation, and in particular relates to a methanol oxidation reforming hydrogen production catalyst used in a hydrogen production process. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. Background technique [0003] Fuel cells are characterized by their high energy conversion efficiency (50-70%) and environmental friendliness (nearly no emission of NO x and SO x , and CO 2 The emissions are also reduced by more than 40% compared with conventional internal combustion engines), which is the best candidate power source for future electric vehicles. Fuel cell technology must have a suitable fuel, and proton exchange membrane fuel cells (PEMFC) use hydrogen as fuel. At present, on-site hydrogen production from methanol is the most realistic hydrogen source for PEMFC. In the 1990s, PEMFC technology achieved rapid development and gradu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/04B01J21/06B01J23/10B01J23/86B01J37/02C01B3/40
CPCY02E60/50Y02P20/52
Inventor 陈光文李淑莲袁权李恒强焦凤君
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI