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Method for preparing hydrogen by reforming methanol and water

A technology of methanol water and catalyst, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of unfriendly environment and high conversion rate of methanol

Inactive Publication Date: 2011-09-28
ZHANGJIAGANG HUIER CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1130594A adopts Cu-Zn-Cr series catalyst, has high methanol conversion rate and good hydrogen selectivity, but its component Cr is an environmentally unfriendly component

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The molar ratio of methanol to water is 1:1, the reaction temperature is 280°C, and the reaction pressure is 2Mpa. The catalyst is composed of 45% copper oxide, 20% aluminum oxide, 10% zirconium oxide, 25% zinc oxide, and 30% titanium dioxide. 4.2kg, the space velocity of the feed of alcohol is 5 grams of alcohol per gram of catalyst per hour, i.e. 21kg / h, the reaction result shows that the single-pass conversion rate of methanol is 99.9%, the hydrogen content in the reaction product is 74.3%, and the CO content is 0.7 %.

Embodiment 2

[0025] Methanol and water mol ratio 1: 3, 200 ℃ of reaction temperatures, reaction pressure 0.1Mpa, the composition of catalyst is cupric oxide 65%, zirconia 35%, packing catalyst 4.2kg, the space velocity of the feeding of alcohol is 0.5 gram alcohol every Gram of catalyst per hour, that is, 2.1kg / h, the reaction results show that the single pass conversion rate of methanol is 98%, the hydrogen content in the reaction product is 72.88%, and the CO content is 0.02%.

Embodiment 3

[0027] Methanol and water molar ratio 1: 3, reaction temperature 220 ℃, reaction pressure 0.1Mpa, the composition of catalyst is copper oxide 35%, zirconium oxide 40%, cerium oxide 25%, packing catalyst 4.2kg, the space velocity of the feed of alcohol It is 2 grams of alcohol per gram of catalyst per hour, that is, 8.4kg / h. The reaction results show that the single pass conversion rate of methanol is 99.5%, the hydrogen content in the reaction product is 74.38%, and the CO content is 0.01%.

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PUM

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Abstract

The invention provides a method for preparing hydrogen by carrying out a reforming dehydrogenation reaction on a reactant of which the ratio of methanol to water is 1:1-3 in the presence of a solid catalyst with copper as a main component. In the method disclosed by the invention, hydrogen gas is generated by using the reactant of which the ratio of methanol to water is 1:1-3 as a gaseous phase or liquid phase and the solid catalyst at the temperature of 200-280DEG C, the air speed of 0.2-2h<-1> and the pressure of 0.1-2MPa; meanwhile, byproducts of CO2 and CO are generated, the conversion rate of methane is over 98 percent and the CO amount is below 2 percent.

Description

technical field [0001] The invention relates to a method for producing hydrogen through methanol water reforming in the presence of a copper-based solid catalyst. Its reaction formula is as follows: [0002] CH 3 OH+H 2 O--→3H 2 +CO 2 [0003] Side effects are as follows: [0004] CH 3 OH--→2H 2 +CO technical background [0005] Hydrogen is an important chemical basic raw material. The usual method for large-scale hydrogen production is steam reforming of natural gas or coal, which requires a large investment and is suitable for large-scale hydrogen use. Hydrogen production by steam reforming of methanol is a clean and convenient method for hydrogen production. The research on catalysts for hydrogen production by methanol water or steam reforming focuses on Cu-Zn-Al catalysts for methanol synthesis, and its reaction temperature is relatively high, usually above 260 °C. CN1130594A adopts Cu-Zn-Cr series catalyst, has high methanol conversion rate and good hydrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/32
Inventor 左卫雄刘胜
Owner ZHANGJIAGANG HUIER CHEM TECH
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