Catalyst used for catalytic reforming of methanol and steam to produce hydrogen, and preparation method and application thereof

A catalytic reforming and catalyst technology, applied in the field of catalysis, can solve problems such as poor selectivity, and achieve the effects of good stability, high activity and simple preparation method

Inactive Publication Date: 2016-11-09
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bei et al. (Bei S K, Ranganathan E S, Thompson L T. Fuel Chemistry Division Preprints, 2003, 48 (1): 327-328) of the University of Michigan prepared Mo 2 N catalyst and used in methanol steam reforming hydrogen production process, it was found that Mo 2 N catalysts have better activity at low temperature, but for CO 2 poor selectivity

Method used

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  • Catalyst used for catalytic reforming of methanol and steam to produce hydrogen, and preparation method and application thereof
  • Catalyst used for catalytic reforming of methanol and steam to produce hydrogen, and preparation method and application thereof
  • Catalyst used for catalytic reforming of methanol and steam to produce hydrogen, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Catalyst 1: 5.89% CuO / 18.76% ZnO / γ-Al 2 o 3

[0032] Its preparation steps are as follows:

[0033] 1) First weigh 12g γ-Al 2 o 3 Calcined at 600°C for 4h in a muffle furnace; then weighed 4.5495g Zn(NO 3 ) 2 ·6H 2 O, 1.2242g NH 4 NO 3 , the two were mixed and dissolved in deionized water to form a nitrate solution with a concentration of 0.2mol / L, and then 5g of γ-Al was added 2 o 3 , mixed uniformly to form a mixed solution;

[0034] 2) Prepare 500mL of ammonia water with a mass fraction of 2%; under normal temperature stirring, drop the prepared 2% ammonia water into the prepared mixed solution; when the pH of the solution=8, stop adding ammonia water, and the temperature rises Measure the pH of the solution after continuing to stir at 50°C for 24 hours;

[0035] 3) Prepare ammonia water and NH that are the same as the above pH respectively 4 NO 3 , mixed to form a mixed washing solution for subsequent use;

[0036] 4) Suction filtration is performed o...

Embodiment 2

[0044] Catalyst 2: 5.89% CuO / 18.76% ZnO / γ-Al 2 o 3

[0045] Its preparation steps are as follows:

[0046] 1) First weigh 12g γ-Al 2 o 3 Calcined at 600°C for 4h in a muffle furnace; then weighed 4.5495g Zn(NO 3 ) 2 ·6H 2 O, 1.2242g NH 4 NO 3 , the two were mixed and dissolved in deionized water to form a nitrate solution with a concentration of 0.1mol / L, and then 5g of γ-Al was added 2 o 3 , mixed uniformly to form a mixed solution;

[0047] 2) Prepare 500mL of ammonia water with a mass fraction of 5%; under normal temperature stirring, drip the prepared 5% ammonia water into the prepared mixed solution; when the pH of the solution=8, stop dripping ammonia water, and the temperature rises Measure the pH of the solution after continuing to stir at 50°C for 24 hours;

[0048] 3) Prepare ammonia water and NH that are the same as the above pH respectively 4 NO 3 , mixed to form a mixed washing solution for subsequent use;

[0049] 4) Suction filtration is performed...

Embodiment 3

[0056] Catalyst: 3: 11.13% CuO / 17.71% ZnO / γ-Al 2 o 3

[0057] Its preparation steps are as follows:

[0058] 1) First weigh 12g γ-Al 2 o 3 Roasted in a muffle furnace at 600°C for 4h; then weighed 4.5495g Zn(NO 3 ) 2 ·6H 2 O, 1.2242g NH 4 NO 3 , the two were mixed and dissolved in deionized water to form a nitrate solution with a concentration of 0.05mol / L, and then 5g of γ-Al was added 2 o 3 , mixed uniformly to form a mixed solution;

[0059] 2) Prepare 500mL of ammonia water with a mass fraction of 2%; under normal temperature stirring, drop the prepared 2% ammonia water into the prepared mixed solution; when the pH of the solution=8, stop adding ammonia water, and the temperature rises Measure the pH of the solution after continuing to stir at 50°C for 24 hours;

[0060] 3) Prepare ammonia water and NH that are the same as the above pH respectively 4 NO 3 , mixed to form a mixed washing solution for subsequent use;

[0061]4) Suction filtration is performed ...

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Abstract

The invention provides a catalyst used for catalytic reforming of methanol and steam to produce hydrogen. The catalyst adopts Cu metal oxide as an active component, oxide obtained after roasting zinc aluminum hydrotalcite is used as a catalyst carrier, and the zinc aluminum hydrotalcite is prepared through an in situ synthesis technology with gamma-Al2O3 as an aluminum source; and the catalyst comprises, by mass, 1-30% of the active component (by oxide) and 70-99% of the carrier (by oxide), and the catalyst carrier comprises, by mass, 5-30% of zinc (by oxide). The zinc aluminum hydrotalcite is prepared through the in situ synthesis technology, the Cu-supported metal oxide catalyst is prepared by using the "structure memory" function of the zinc aluminum hydrotalcite, and the catalyst has high activity, low CO selectivity and high stability in the process of methanol and steam catalytic reforming for producing hydrogen.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a hydrotalcite-derived catalyst used for catalytic reforming of methanol steam to produce hydrogen and a preparation method thereof. Background technique [0002] With the rapid development of economy, our country is facing the double pressure of energy and environment. While optimizing the utilization of fossil resources and improving energy conversion efficiency, the development and utilization of new energy has become a major strategic demand to alleviate the contradiction between energy supply and demand in my country, realize energy diversification, and maintain sustainable development of the economic environment. Hydrogen is very abundant on the earth, has a high calorific value of combustion, and does not produce any pollution after combustion, which is very beneficial to environmental protection, so it is regarded as an ideal clean new energy in the 21st cen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C01B3/32
CPCB01J23/002B01J23/80B01J2523/17B01J2523/27B01J2523/31C01B3/323
Inventor 杨占旭张磊贺建平
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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