Multi-functional catalyst for reforming hydrogen production and preparation method and application of catalyst

A technology of reforming hydrogen production and composite functions, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, etc., can solve the problem of increasing process complexity and unfavorable regeneration process Operation, it is difficult to ensure the uniformity and stability of mixing, etc., to achieve the effects of avoiding rapid deactivation, good CO2 adsorption performance, and good catalytic hydrogen production performance

Inactive Publication Date: 2016-11-16
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process is to mix the catalyst and the adsorbent into the reactor, which not only increases the complexity of the process, but also makes it difficult to ensure the uniformity of the mixing and the stability of the two, which is not conducive to the operation of the regeneration process

Method used

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  • Multi-functional catalyst for reforming hydrogen production and preparation method and application of catalyst
  • Multi-functional catalyst for reforming hydrogen production and preparation method and application of catalyst
  • Multi-functional catalyst for reforming hydrogen production and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 3.5g analytically pure Ca(NO 3 ) 2 ·6H 2 O, use deionized water to prepare a calcium nitrate aqueous solution with a mass concentration of 40%, weigh 3g of γ-Al through a 70 mesh sieve 2 o 3 Stir and mix evenly with calcium nitrate aqueous solution at 53°C for 3.5 hours; add 1 mol / L ammonia water dropwise to adjust the pH of the mixture to 8.5, continue stirring for 4 hours, and let stand for 1.5 hours to age.

[0036] The mixture was continuously stirred at 1 atmospheric pressure and 95°C until the water evaporated to dryness. The evaporated powder was dried in an air atmosphere at 120° C. for 24 hours, ground, and passed through a 70-mesh sieve to obtain a catalyst precursor.

[0037] Weigh 4g of analytically pure NiO, prepare a nickel nitrate solution with a mass concentration of 40% with 2.5mol / L dilute nitric acid, impregnate the catalyst precursor with nickel nitrate, stir and mix evenly at 25°C for 3.5h, and add 1mol / L dropwise ammonia water to adjust ...

Embodiment 2

[0040] Weigh 2.3g of analytically pure Ca(NO 3 ) 2 ·6H 2 O, use deionized water to prepare a calcium nitrate aqueous solution with a mass concentration of 30%, weigh 2.5g of γ-Al through a 60-mesh sieve 2 o 3 Stir and mix evenly with calcium nitrate aqueous solution at 45°C for 3 hours; add 1 mol / L ammonia water dropwise to adjust the pH of the mixture to 9.0, continue stirring for 3 hours, and let it stand for 1 hour to age.

[0041] The mixture was stirred continuously at 1 atmosphere and 90°C until the water evaporated to dryness. The evaporated powder was dried at 120° C. for 10 h in an air atmosphere, ground, and passed through a 60-mesh sieve to obtain a catalyst precursor.

[0042] Weigh 4.2g of analytically pure NiO, prepare a nickel nitrate solution with a mass concentration of 30% with 2.5mol / L dilute nitric acid, impregnate the catalyst precursor with nickel nitrate, stir and mix at 10°C for 3 hours, and add 1mol / L dropwise ammonia water to adjust the pH of the...

Embodiment 3

[0045] Weigh 5.2g analytically pure Ca(NO 3 ) 2 ·6H 2 O, use deionized water to prepare a calcium nitrate aqueous solution with a mass concentration of 50%, and weigh 3.5g of γ-Al through a 60-mesh sieve 2 o 3 Stir and mix evenly with calcium nitrate aqueous solution at 65°C for 4 hours; add 1 mol / L ammonia water dropwise to adjust the pH of the mixture to 9.5, continue stirring for 5 hours, and let stand for 2 hours to age.

[0046] The mixture was continuously stirred under the conditions of 1 atmosphere pressure and 93°C until the water evaporated to dryness. The evaporated powder was dried at 120° C. for 10 h in an air atmosphere, ground, and passed through a 60-mesh sieve to obtain a catalyst precursor.

[0047] Weigh 2.3g of analytically pure NiO, prepare a nickel nitrate solution with a mass concentration of 50% with 2.5mol / L dilute nitric acid, impregnate the catalyst precursor with nickel nitrate, stir and mix at 30°C for 3 hours, and add 1mol / L dropwise ammonia ...

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Abstract

The invention relates to the technical field of preparation of a catalyst, and discloses a multi-functional catalyst for reforming hydrogen production and a preparation method and application of the catalyst. The catalyst is excellent in catalytic hydrogen production performance and CO2 adsorption performance, simple in preparation process, low in cost and beneficial for popularization and application. The chemical formula of the catalyst is NiO-CaO-NiAl2O4 / Al2O3. Al2O3 is a carrier, and NiAl2O4 has a spinel structure. The catalyst comprises raw materials, by weight part, 23-42 parts of NiO, 25-35 parts of gamma-Al2O3 and 23-52 parts of Ca(NO3)2.6H2O. The invention further discloses a preparation method of the catalyst and an application of the catalyst to reforming hydrogen production from glycerin.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a composite functional reforming hydrogen production catalyst and its preparation method and application. Background technique [0002] The steam reforming hydrogen production technology is mature and low cost, and has an absolute advantage in industrial hydrogen production. The general steam reforming hydrogen production process includes several units: raw material pretreatment unit, steam reforming unit, high temperature and low temperature water gas conversion unit, CO removal 2 Purification unit and waste heat recovery unit, etc. However, since the steam reforming hydrogen production reaction is a reversible reaction with strong endothermicity, its reaction conditions are harsh, it is a production process with high energy consumption, and the overall reaction efficiency is low, and the purity of hydrogen produced is not high. The subsequent hydrogen purificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J20/08B01J20/30B01D53/02C01B3/32
CPCB01D53/02B01D2257/504B01J20/041B01J20/06B01J20/08B01J23/002B01J23/78B01J2523/00C01B3/326C01B2203/0233C01B2203/1058B01J2523/23B01J2523/31B01J2523/847Y02C20/40Y02P20/151
Inventor 王超陈颖成正东蔡小燕
Owner GUANGDONG UNIV OF TECH
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