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Copper-free non-noble-metal catalyst for preparing hydrogen by oxidation and reformation of methanol

A non-precious metal, reforming hydrogen production technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as easy oxidation and high temperature sintering, Achieve the effect of high activity, good stability and convenient use

Inactive Publication Date: 2004-02-25
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

Copper-based catalysts have the advantage of high activity at low temperature, but they also have certain limitations, such as easy oxidation, high temperature sintering, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Rolled Al 2 o 3 Balls, after roasting at 500°C for 2 hours, take 20 grams of 20-30 mesh pellets, and measure their water absorption. Weigh 9.3 grams of zinc nitrate and 0.8 grams of lanthanum nitrate, dissolve with an appropriate amount of distilled water, pour into Al 2 o 3 The carrier was impregnated at room temperature for 4 hours, baked in an oven overnight, baked in a muffle furnace at 500°C for 3 hours, and cooled to room temperature to obtain a catalyst intermediate. Weigh again 4 grams of ammonium molybdate, add water and heat to dissolve, pour the catalyst intermediate into the solution for secondary impregnation, dry and roast as before to obtain the finished catalyst. The composition is obtained as 12ZnO-1.1La 2 o 3 -10Mo 2 o 3 -76.9Al 2 o 3 (wt%) catalyst.

example 2

[0010] Get the catalyzer 20-30 order 1.5ml (about 2 grams) of example 1, get the Al 2 o 3 Mix 1.5ml with the catalyst, put it into the constant temperature section of the reaction tube with an inner diameter of 10mm, and fill the upper and lower empty tubes with inert filler. Feed methanol and water mixture, water / methanol (molar ratio) = 1.0 Preheat temperature 200°C, feed air so that the molar ratio of oxygen to methanol is 0.2. When temperature T=430℃, normal pressure, S.V.=2000hr -1 , the conversion rate of methanol is 99-100%, and the selectivity of hydrogen production is over 80%.

example 3

[0011] Example 3. take by weighing 5 grams of yttrium nitrate, 66 grams of zinc nitrate, measure manganese nitrate solution (concentration 50%) 30ml with graduated cylinder, cerium nitrate 7.6 grams, all be soluble in distilled water, solution total amount is 500ml. This is solution 1. Prepare 0.5M sodium carbonate solution as solution 2. Put solution 1 and solution 2 into the sedimentation tank at the same speed and at the same time under stirring, add 200ml distilled water in advance, control the pH at about 7.5 during the precipitation process, and control the temperature at about 45°C until the precipitation is complete. After aging for 1 hour, wash until neutral, dry, bake at 500°C for 4 hours, sieve through 90-110 mesh, and then press into tablets to obtain a composition of 62.9ZnO-5.1Y 2 o 3 -31MnO-1.0CeO 2 (wt%) catalyst.

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Abstract

A copper-free non-noble-metal catalyst for preparing hydrogen by oxidizing and reforming methoanol is composed of primary component which is two metals chosen from V, Cr, Mn, Zn, Mo, Fe, Co, Ni and Ru and catalyst aid which may be one or more of La, Ce and Y. Its advantages include high thermal stability, activity and selectivity.

Description

technical field [0001] The invention relates to methanol oxidative reforming reaction, and specifically provides a copper-free non-precious metal catalyst for methanol oxidative reforming to produce hydrogen. Background technique [0002] The use of methanol to produce hydrogen has been an eye-catching research project in the fields of energy and chemical industry in the past 20 to 30 years. Especially in recent years, to provide hydrogen sources for fuel cells, this technology project has become a hot spot in research and development at home and abroad. The key technology is Oxidative reforming catalyst. According to literature review, hydrogen production technology still uses copper-based catalysts through methanol steam reforming. For example, Chongjun Jiang, Davidl.Trimm and Mark S.Wainwright designed a methanol-hydrogen adiabatic reactor without external heat supply in the document chem.eng.Technol.18 (1995) 1-6, with two reaction zones inside , one of which is methan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/16B01J23/74B01J23/76
Inventor 洪学伦吴迪镛王树东刘淑芬张朋亓爱笃
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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