Cobalt-based catalyst for preparing hydrogen through acetic acid autothermal reforming and preparation method

A cobalt-based catalyst, autothermal reforming technology, applied in the direction of chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, heterogeneous catalyst chemical elements, etc., can solve the problem of easy oxidation of active component cobalt and Solve problems such as sintering, easy structure change, and catalyst deactivation, and achieve the effects of increasing reducibility, inhibiting migration, and high hydrogen production rate

Active Publication Date: 2017-09-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a structure for the problem that the structure of the existing cobalt-based catalyst is easy to change and the active component cobalt is easy to oxidize and sinter in the process of autothermal reforming to produce hydrogen, which leads to catalyst deactivation. A new type of cobalt-based catalyst that is stable, sintering-resistant, oxidation-resistant, and active

Method used

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  • Cobalt-based catalyst for preparing hydrogen through acetic acid autothermal reforming and preparation method
  • Cobalt-based catalyst for preparing hydrogen through acetic acid autothermal reforming and preparation method

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example 2

[0027] Weigh 5.4622 grams of Co(NO 3 ) 3 .6H 2 O, 27.9172 g Zn(NO 3 ) 3 .6H 2 O and 7.0406 g Al(NO 3 ) 3 .9H 2 O, add 131 mL of deionized water and mix to form solution #1. Weigh 12.012 grams of sodium hydroxide and 1.9893 grams of sodium carbonate and add 319 milliliters of deionized water to form solution #2. Mix solution #1 and solution #2 at pH 10.5 + Within the range of 0.5, the co-precipitation operation was carried out in a water bath of 78 degrees Celsius, and the temperature was maintained for 24 hours with stirring and aging. The precipitate was filtered and washed three times with deionized water, and dried in an oven at 105 degrees Celsius for 12 hours to obtain a hydrotalcite-like precursor, whose typical structure is shown in the attached figure 1 shown. The precursor was calcined at 700 degrees Celsius for 4 hours to obtain the catalyst CDUT-ZC6A, whose typical structure is as follows figure 2 shown. After nitrogen adsorption / desorption experiments...

Embodiment 1

[0030] Weigh 5.5134 grams of Co(NO 3 ) 3 .6H 2 O, 22.5415 grams of Zn (NO 3 ) 3 .6H 2 O and 17.7653 g Al(NO 3 ) 3 .9H 2 O, add 142 mL of deionized water and mix to form solution #1. Weigh 21.2162 g of sodium hydroxide and 3.5136 g of sodium carbonate and add 564 ml of deionized water to form solution #2. Mix solution #1 and solution #2 at pH 10.5 + Within the range of 0.5, the co-precipitation operation was carried out in a water bath of 78 degrees Celsius, and the temperature was maintained for 24 hours with stirring and aging. The precipitate was filtered and washed three times with deionized water, and dried in an oven at 105 degrees Celsius for 12 hours to obtain a hydrotalcite-like precursor, whose typical structure is shown in the attached figure 1 shown. The precursor is calcined at 700 degrees Celsius for 4 hours to obtain the catalyst CDUT-ZC2A, whose typical structure is as follows figure 2 shown. After nitrogen adsorption / desorption experiments, the re...

Embodiment 2

[0033] Weigh 5.4898 g Co(NO 3 ) 3 .6H 2 O, 24.9974 g Zn(NO 3 ) 3 .6H 2 O and 12.8658 g Al(NO 3 ) 3 .9H 2 O, add 137 mL of deionized water and mix to form solution #1. Weigh 17.0113 g of sodium hydroxide and 2.8172 g of sodium carbonate and add 452 ml of deionized water to form solution #2. Mix solution #1 and solution #2 at pH 10.5 + Within the range of 0.5, the co-precipitation operation was carried out in a water bath of 78 degrees Celsius, and the temperature was maintained for 24 hours with stirring and aging. The precipitate was filtered and washed three times with deionized water, and dried in an oven at 105 degrees Celsius for 12 hours to obtain a hydrotalcite-like precursor, whose typical structure is shown in the attached figure 1 shown. The precursor was calcined at 700 degrees Celsius for 4 hours to obtain the catalyst CDUT-ZC3A, whose typical structure is as follows figure 2 shown. After nitrogen adsorption / desorption experiments, the results show tha...

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Abstract

The invention relates to a cobalt-based catalyst for preparing hydrogen through acetic acid autothermal reforming and a preparation method. The novel catalyst which is sintering resistant, resistant to carbon deposition, oxidation resistant and high in activity aims at solving the problem of catalyst deactivation caused by structure change and active component oxidation and sintering of an existing catalyst in the acetic acid autothermal reforming process. The chemical component of the catalyst is CoZnAlO<7.5+/-delta>, wherein a is 0.25-1.00 and b is 0.75-5.00. A Zn-Al layered hydrotalcite-like structure is prepared by adopting a coprecipitation method as a precursor, an active component cobalt is introduced, and enters a laminate structure of the hydrotalcite-like structure through isomorphous replacement of zinc with cobalt; a composite oxide obtained by roasting can effectively restrain the probable migration, aggregation and sintering of the active component cobalt at high temperature, so as to enhance the thermal stability of the catalyst; and meanwhile, the reductibility, the stability and the oxidation resistance of the active component cobalt are improved through the carrier zinc oxide, so that the activity and the stability of the catalyst are improved.

Description

technical field [0001] The invention relates to a cobalt-based catalyst for producing hydrogen by autothermal reforming of acetic acid and a preparation method thereof, more specifically, a precursor having a hydrotalcite-like structure, which is used for producing hydrogen by autothermal reforming of acetic acid The invention discloses a cobalt-based catalyst and a preparation method thereof, which belong to the technical field of producing hydrogen by autothermal reforming of acetic acid. Background technique [0002] Hydrogen is a clean energy carrier, especially suitable for fuel cells, and is regarded as an ideal clean energy carrier in the future. At present, hydrogen is mainly produced from primary energy conversion such as natural gas and coal, which leads to the CO in the atmosphere 2 content increase. Biomass obtained from photosynthesis of plants is an important renewable energy source. However, biomass has a low energy density and can be transformed into an en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/10C01B3/32
CPCB01J23/002B01J23/80B01J35/10B01J2523/00C01B3/326C01B2203/0233C01B2203/0244C01B2203/0261C01B2203/1211B01J2523/845B01J2523/27B01J2523/31
Inventor 黄利宏周庆王巧李辉谷杨季龙
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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