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Preparation method and application of efficient and stable molybdenum carbide catalyst for dimethyl ether steam reforming hydrogen production

A steam reforming and catalyst technology, applied in physical/chemical process catalysts, hydrolysis preparation, molecular sieve catalysts, etc., can solve the problems of exceeding fuel cell tolerance, high content of by-products, poor thermal stability, etc., and achieve the source of catalysts. Wide range, high hydrogen production efficiency and stable performance

Active Publication Date: 2020-07-10
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of Cu-based catalysts, especially thermal stability is poor; noble metal catalysts are generally supported by oxides, but the reactants on this catalyst are easy to decompose, resulting in a high content of by-products, and the CO content exceeds the tolerance of the fuel cell
[0007] So far, there have been no relevant reports on the application of molybdenum carbide catalysts to hydrogen production by steam reforming of dimethyl ether.

Method used

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  • Preparation method and application of efficient and stable molybdenum carbide catalyst for dimethyl ether steam reforming hydrogen production
  • Preparation method and application of efficient and stable molybdenum carbide catalyst for dimethyl ether steam reforming hydrogen production
  • Preparation method and application of efficient and stable molybdenum carbide catalyst for dimethyl ether steam reforming hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Catalyst preparation

[0036] Dissolve 4.88g of aluminum nitrate and 2.30g of ammonium paramolybdate in 50ml of deionized water respectively, and stir until fully dissolved. Slowly add the aluminum nitrate solution drop by drop to the ammonium paramolybdate solution, stir for 4 hours, then place the mixed solution in an 80°C oil bath and evaporate to dryness, and dry the evaporated solid in an oven at 120°C for 12 hours, then place In a muffle furnace, the temperature was raised to 500°C at a rate of 10°C / min, and then roasted at 500°C for 4 hours to obtain MoO 3 / Al 2 o 3 Precursor, resulting MoO 3 / Al 2 o 3 Molybdenum and Al in the precursor 2 o 3 The molar ratio is 1:0.5.

[0037] Dissolve 0.042g of chloroplatinic acid in water to form a solution, take 1gMoO 3 / Al 2 o 3 Precursor, chloroplatinic acid solution was impregnated in MoO by equal volume impregnation method 3 / Al 2 o 3 precursor, and dried in a vacuum oven at 60°C to obtain Pt-MoO 3 / Al 2 o ...

Embodiment 2

[0054] The specific implementation steps of this embodiment are basically the same as those of Embodiment 1, except that the chloroplatinic acid solution is replaced with a solution prepared by 0.3 g of copper nitrate, and the rest of the steps remain unchanged.

Embodiment 3

[0056] The specific implementation steps of this embodiment are basically the same as in embodiment 2, the only difference is that aluminum nitrate is replaced by nanometer γ-Al 2 o 3 , and the rest of the steps remain unchanged.

[0057] Specific steps are as follows:

[0058] 2. Dissolve 30g of ammonium paramolybdate in 50ml of deionized water and stir until fully dissolved. 1.325g nanometer γ-Al 2 o 3 Add water and stir well, and mix the two liquids, stir for 4 hours and evaporate to dryness in an 80°C oil bath, and dry the evaporated solid in an oven at 120°C for 12 hours, and then place it in a muffle furnace to 10°C / min heating rate to 500°C, and calcination at 500°C for 4 hours to obtain MoO 3 / γ-Al 2 o 3 Precursor.

[0059] Dissolve copper nitrate in water, impregnate copper nitrate solution in MoO by equal volume impregnation method 3 / γ-Al 2 o 3 on the precursor, and dried in an oven to obtain Cu-MoO 3 / γ-Al 2 o 3 .

[0060] Cu-MoO 3 / γ-Al 2 o 3 Pla...

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Abstract

The invention discloses a preparation method and application of an efficient and stable molybdenum carbide catalyst for dimethyl ether steam reforming hydrogen production. The catalyst is a bifunctional catalyst. Solid acid is used as a dimethyl ether hydrolysis active component, molybdenum carbide is used as a methanol reforming hydrogen production active component, the preparation method of thecatalyst is safe and simple, the obtained catalyst is stable in performance, high in efficiency and few in byproducts when used for catalyzing dimethyl ether steam reforming hydrogen production, and anew application field of the molybdenum carbide for catalyzing dimethyl ether steam reforming hydrogen production is developed.

Description

Technical field: [0001] The invention relates to the field of hydrogen preparation, in particular to an efficient and stable preparation method of a molybdenum carbide catalyst used for hydrogen production by steam reforming of dimethyl ether. Background technique: [0002] In recent years, the depletion of petroleum energy, the deterioration of the ecological environment and the pressure of sustainable development have made the development of new energy and efficient use of energy an urgent issue facing mankind. The development and utilization of hydrogen energy can reduce oil consumption, improve the ecological environment, and realize the diversified development of energy sources. How to reasonably and efficiently produce, store and use hydrogen has become a hot topic in current research. [0003] Fuel cells convert the chemical energy of hydrogen directly into electrical energy through electrode reactions, and the energy efficiency is not limited by the Carnot cycle. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J29/48C07C29/10C07C31/04C01B3/32
CPCB01J27/22B01J29/48C07C29/10C01B3/326C01B2203/107C01B2203/1076C01B2203/1082C01B2203/0233C07C31/04Y02P20/10Y02P20/52
Inventor 闫常峰连晶红谭弘毅郭常青王志达史言卢卓信
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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