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Copper-based catalyst for hydrogen production by methanol steam reforming and preparation method and application thereof

A technology of steam reforming and copper-based catalysts, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., which can solve the problems of high hydrogen selectivity, poor high temperature stability, Time-consuming preparation process and other issues, to achieve the effect of good low-temperature activity, strong thermal stability, simple and easy-to-operate preparation method

Pending Publication Date: 2021-12-03
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN110075859A discloses a nickel-chromium-based methanol hydrogen production catalyst added with various additives. The catalyst can better control the CO concentration in the reforming tail gas, but the preparation process is time-consuming, complicated and dangerous
CN110075889A discloses a methanol reforming hydrogen production catalyst prepared by carburizing carbonization process. The catalyst is composed of Zn, Pt, Mo and other components, and can carry out methanol hydrogen production reaction under mild conditions, and the CO concentration in the tail gas maintains At lower levels, but more expensive to prepare due to the use of noble metals in the catalyst
In the steam reforming system of methanol, copper-based catalysts have good reactivity, high hydrogen selectivity, and low manufacturing cost. They are the most studied catalysts for hydrogen production from methanol. Shortcomings such as poor high temperature stability, further improvement and optimization are urgently needed

Method used

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  • Copper-based catalyst for hydrogen production by methanol steam reforming and preparation method and application thereof
  • Copper-based catalyst for hydrogen production by methanol steam reforming and preparation method and application thereof
  • Copper-based catalyst for hydrogen production by methanol steam reforming and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Dissolve 14.742g copper nitrate, 9.138g zinc nitrate, 6.639g cerium nitrate, 6.604g zirconium nitrate, 0.787g magnesium nitrate in 100mL deionized water and stir to clear liquid to obtain solution A; dissolve 11.537g aluminum nitrate Dissolve 21.2 g of sodium carbonate in 100 mL of deionized water to obtain a sodium carbonate solution; dissolve 11.3 g of ammonium bicarbonate in 100 mL of deionized water to obtain an ammonium bicarbonate solution;

[0032] (2) at 70-80 ℃, add solution A to sodium carbonate solution to carry out reverse co-precipitation, keep fully stirring during precipitation, obtain mixed mother liquor, and adjust the pH of mixed mother liquor to 7.5-8.0; at 45-55 ℃ , adding the ammonium bicarbonate solution to solution B for precipitation, maintaining full stirring during the precipitation to obtain an aluminum emulsion, and adjusting the pH of the aluminum emulsion to 6.5-7.0;

[0033] (3) At 70-80 ℃, the aluminum emulsion is added to the mixed m...

Embodiment 2

[0036] (1) Dissolve 14.742g copper nitrate, 9.138g zinc nitrate, 6.639g cerium nitrate, 6.604g zirconium nitrate, 1.575g magnesium nitrate in 100mL deionized water and stir to clear liquid to obtain solution A; dissolve 11.537g aluminum nitrate Dissolve 21.2 g of sodium carbonate in 100 mL of deionized water to obtain a sodium carbonate solution; dissolve 11.3 g of ammonium bicarbonate in 100 mL of deionized water to obtain an ammonium bicarbonate solution;

[0037] Steps (2) to (3) are the same as in Example 1; the catalyst is labeled as 40Cu-20Zn-10Zr-10Ce-4Mg / 20Al.

[0038] The copper-based catalyst for hydrogen production by methanol steam reforming prepared in this example is used for the hydrogen production reaction of fixed-bed methanol steam reforming. The reaction activation temperature is 300 ° C, the raw material water-alcohol molar ratio is 1.2, and the liquid hourly space velocity is 2 h. -1 , the reaction pressure is 0.1Mpa, the reaction temperature is 250 ℃, and...

Embodiment 3

[0040] Steps (1) to (3) are the same as in Example 1; the catalyst is labeled as 40Cu-20Zn-10Zr-10Ce-2Mg / 20Al.

[0041] The copper-based catalyst for hydrogen production by methanol steam reforming prepared in this example is used for the hydrogen production reaction of fixed-bed methanol steam reforming. The reaction activation temperature is 350 ° C, the raw material water-alcohol molar ratio is 1.2, and the liquid hourly space velocity is 2 h. -1 , the reaction pressure is 0.1Mpa, the reaction temperature is 250℃, and the reaction time is 8h.

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Abstract

The invention discloses a copper-based catalyst for hydrogen production by methanol steam reforming and a preparation method and application thereof, CuO is used as a main active component, the copper-based catalyst also comprises ZnO, Al2O3, ZrO2, CeO2 and an auxiliary agent MxOy, and MxOy is one of MgO, La2O3, CaO or MnO. The catalyst is applied to methanol steam reforming hydrogen production reaction, and has the advantages of high methanol conversion rate, low CO content in reforming tail gas, good low-temperature activity, strong thermal stability and the like. The preparation process is simple, raw materials are cheap and easy to obtain, and the method has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production technology, and in particular relates to a copper-based catalyst for hydrogen production by methanol steam reforming and a preparation method and application thereof. Background technique [0002] With the development of the global energy situation, hydrogen energy as a recognized clean secondary energy has broad application prospects. The existing relatively mature hydrogen production processes include natural gas hydrogen production, coal hydrogen production, water electrolysis hydrogen production, methanol hydrogen production Wait. Compared with other hydrogen production processes, methanol hydrogen production process has the characteristics of mild reaction conditions, short process, low energy consumption, simple device and low investment, and can be well used in small-scale hydrogen production. Methanol is a good hydrogen carrier, and the methanol hydrogen production process is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/889B01J37/03C01B3/32
CPCB01J23/002B01J23/83B01J23/8892B01J37/03C01B3/326B01J2523/00C01B2203/0233B01J2523/17B01J2523/22B01J2523/27B01J2523/31B01J2523/3712B01J2523/48B01J2523/72
Inventor 连奕新佘姮吴洪键刘茜桐王叶菲
Owner XIAMEN UNIV
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