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Composite oxide catalyst for producing hydrogen by reforming methanol steam, preparation and application thereof

A composite oxide, steam reforming technology, applied in metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc.

Inactive Publication Date: 2009-12-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, in the above-mentioned disclosed methods, none of the methods can prepare catalysts with both high catalytic activity and sufficiently long life.

Method used

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  • Composite oxide catalyst for producing hydrogen by reforming methanol steam, preparation and application thereof
  • Composite oxide catalyst for producing hydrogen by reforming methanol steam, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh Ce(NO 3 ) 3 ·6H 2 45.5g of O was thermally decomposed in a muffle furnace at 450°C for 4 hours to obtain CeO 2 Powder for later use. Weigh 6.97g Zr(NO 3 ) 4 ·5H 2 O is added with water to form an aqueous solution with a concentration of 0.2 g / ml, and an equal volume of CeO is impregnated. 2 , satisfying ZrO 2 The content is 10wt%, and it is ready for use after being dried and calcined at 500°C.

[0020] Weigh Cr(NO 3 ) 3 9H 2 O 3.95g, Zn(NO 3 ) 2 ·6H 2 O 12.79g was dissolved in deionized water, and diluted to 150ml, then mixed with 3g ZrO 2 -CeO 2 Mix the dry powder evenly, titrate with 1mol / L ammonia water to pH=7 under stirring, filter and wash, dry at 110°C, and bake at 500°C for 3 hours.

Embodiment 2

[0022] Weigh Cr(NO 3 ) 3 9H 2 O 3.95g, Zn(NO 3 ) 2 ·6H 2 O 9.44g adds deionized water and dissolves and dilutes to 150ml, and the 3g ZrO prepared with example 1 2 -CeO 2 The dry powder is mixed evenly, and the following preparation method is the same as Example 1.

Embodiment 3

[0024] Weigh Cr(NO 3 ) 3 9H 2 O 6.63g, Zn(NO 3 )2 ·6H 2 O 10.74g adds deionized water to dissolve and dilute to 150ml, and the ZrO that 3g example 1 prepares 2 -CeO 2 The dry powder is mixed evenly, and the following preparation method is the same as Example 1.

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Abstract

The invention provides a composite oxide catalyst for producing hydrogen by reforming methanol steam. The catalyst takes ZnO as a main active component and takes composite oxides including Cr2O3, ZrO2, CeO2 and the like as catalytic and heat-stable additives and carriers in order to solve the defect that catalysts in the prior art for producing hydrogen by reforming methanol steam is low in activity and poor in stability. The catalyst is capable of methanol steam reforming reaction at a high reaction temperature between 430 and 480 DEG C at a total gas hourly space velocity between 5,000 and 30,000 h<-1>, wherein the hydrogen content of reformed gas is over 74 percent (mol), and the methanol conversion rate is still above 93 percent after 450 hours. The catalyst has the advantages of high activity and good stability, and is particularly applicable to the process of reforming methanol steam in palladium membrane reactors for producing pure hydrogen in situ.

Description

technical field [0001] The invention relates to hydrogen production by steam reforming of methanol, in particular to a composite oxide catalyst for hydrogen production by steam reforming of methanol and its preparation and application. Background technique [0002] In the methanol reforming hydrogen production reaction system, methanol steam reforming reaction produces hydrogen (CH 3 OH+H 2 O→CO 2 +3H 2 ) has a high hydrogen concentration (greater than 74 mol%) in the reformed tail gas. In the prior art, noble metals are loaded onto ZnO, Al 2 o 3 , CeO 2 Supported catalyst (Iwasa, Appl.Catal A, 1995, 125:145; Top Catal, 2003, 22:220; Appl.Catal A, 2003, 248:153) or select Cu, Ni, Cr, Zn, Al, Zr The iso-supported catalyst (Lindstrom, Int. J. Hydro. Ener. 2001, 26: 923-933; CN1130594A) is used as a hydrogen production catalyst for steam reforming of methanol. [0003] The above disclosed noble metal catalysts, especially Pd / ZnO alloy catalysts, have good activity and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26B01J23/06B01J23/10C01B3/40B01J37/02
Inventor 陈光文李淑莲焦凤军袁权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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