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Catalyst for autothermal reformation of methanol to prepare hydrogen and its prepn process and application

An autothermal reforming and catalyst technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., to achieve the effects of small size, easy replacement and strong shock resistance

Inactive Publication Date: 2005-09-28
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

Mature monolithic catalysts for autothermal reforming of methanol to hydrogen from non-noble metals have not been reported so far

Method used

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  • Catalyst for autothermal reformation of methanol to prepare hydrogen and its prepn process and application
  • Catalyst for autothermal reformation of methanol to prepare hydrogen and its prepn process and application
  • Catalyst for autothermal reformation of methanol to prepare hydrogen and its prepn process and application

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] Example 1: Preparation of Zn-Cr / Ce-Zr / cordierite catalyst

[0040] a) Take 1 piece of φ15×25mm 400cpsi (400 holes / square inch) cordierite honeycomb ceramic, use 3% HNO 3 Pretreatment for 12 hours, drying at 120°C for 12 hours, and roasting at 900°C for 2 hours.

[0041] b) Weigh out industrial grade Ce(NO 3 ) 3 ·6H 2 O 630g, add deionized water and stir to dissolve. Weigh industrial grade Zr(OH) 4 57.8g, put it into a beaker, add 110±2ml of 65-68% concentrated nitric acid, heat the reaction until there are no visible particles and the solution is transparent, add 200±10ml of deionized water, and the solution is clear. The dissolved Zr(NO 3 ) 4 The solution was poured into Ce(NO 3 ) 3 In the solution, filter, stir and mix uniformly to obtain Ce(NO 3 ) 3 with Zr(NO 3 ) 4 mixture. with 13%NH 4 OH as gelling agent, with 35% HNO 3 As a degelling agent, CeO was prepared by sol-gel method 2 -ZrO 2 The composite oxide sol is ready for use. The pH of the sol ...

example 2

[0045] Example 2: Preparation of Zn-Cr / Ti-Zr / cordierite catalyst

[0046] a) The pretreatment of the cordierite honeycomb ceramic carrier is the same as in Example 1.

[0047] b) Weigh out analytically pure TiO 2 Powder 42.7535g, analytically pure ZrO 2 Powder 42.5780g, add 40ml deionized water and 4g pseudoboehmite (Al 2 O 3 ·H 2 O), ball milled for 18 hours. The pH value of the ball-milling slurry is adjusted to be equal to 3.0 with 10% dilute nitric acid solution for later use.

[0048] c) Weigh the above honeycomb ceramic carrier with a weight of 2.2191g, take TiO 2 -ZrO 2 The composite oxide latex was immersed for 3 minutes, taken out, and blown through the channel with compressed air, dried by microwave for 3 minutes, and calcined in a muffle furnace at 500° C. for 2 hours to obtain a catalyst intermediate weight of 2.6634 g.

[0049] d) Measure 70ml of the Zn-Cr mixed solution of Example 1, transfer it into a beaker and place it on a temperature-programmed elect...

example 3

[0050] Example 3: Zn-Cr / Ce-Zr / Al 2 O 3 / cordierite catalyst preparation

[0051] a) The pretreatment of the cordierite honeycomb ceramic carrier is the same as in Example 1.

[0052] b) Weigh out pseudo-boehmite (Al 2 O 3 ·H 2 O) 9.5g, gibbsite (Al(OH) 3 ) 12.4g, aluminum oxide (γ-Al 2 O 3 ) 14.3g, aluminum nitrate Al(NO 3 ) 3 ·9H 2 O6.7g, after mixing, add 250ml deionized water, 5ml 65-68% nitric acid, ball mill for 12 hours to obtain an aluminum latex (slurry) with an average particle size of 1 μm, and the measured viscosity is 1300 centipoise (cp), and the pH is 3.60.

[0053] c) Take 1 piece of pretreated carrier with a weight of 1.4834g, impregnate it with aluminum latex for 3 minutes, purge the channel with compressed air after taking it out, dry it with microwave for 3 minutes, and bake it in a muffle furnace at 650°C for 2 hours to obtain the weight of the catalyst intermediate 1.5385g.

[0054] d) CeO 2 -ZrO 2 The preparation and coating of the composit...

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Abstract

The catalyst has metal oxide without copper and noble metal as main active component and the composite oxide of RE and transition metal as transition layer assistant. Its preparation process includes coating transition layer assistant sol onto the carrier, drying and roasting, setting in boiled active component solution, heating the solution in the temperature raise rate of 1-2 deg.c / min to 130-190 deg.c, taking out the catalyst, blowing the catalyst to eliminate the residue in the catalyst passages, drying and roasting to obtain the catalyst. The catalyst needs activation before use, has methanol converting rate maintained in 100 % after use for 1000 hr and is suitable for use in hydrogen source system of fuel cell with unstable operation.

Description

technical field [0001] The invention relates to a methanol autothermal reforming hydrogen production catalyst. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the use of the catalysts described above. Background technique [0004] Since the beginning of fuel cell research, the use of alcohols or hydrocarbons to provide hydrogen sources for mobile power sources such as vehicle fuel cells through reforming reactions has always been one of the research hotspots in various countries. At present, automobile manufacturers in the United States, Germany, Japan and other countries have multiple methanol reforming and gasoline reforming hydrogen source fuel cell vehicles on display. At the same time, many large companies in the world have demonstrated fuel reforming and fuel cell integrated power generation devices. . In September 2002, Daimler Chrysler's NECAR 5 methanol reforming fuel cell ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/16B01J23/34B01J23/74B01J23/755C01B3/02H01M8/22
CPCY02E60/50
Inventor 王树东刘娜袁中山王淑娟张纯希付桂芝
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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