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Nickel-base catalyst used for autothermal reforming of ethanol for producing hydrogen and preparation method thereof

A nickel-based catalyst, autothermal reforming technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as catalyst deactivation, and achieve hydrogen High yield, improved low-temperature reactivity, and stable structure

Inactive Publication Date: 2011-02-16
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a stable structure, anti-sintering, anti-coking, New catalyst with high oxidation resistance and high activity to reduce reaction temperature and maintain high hydrogen production rate

Method used

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  • Nickel-base catalyst used for autothermal reforming of ethanol for producing hydrogen and preparation method thereof
  • Nickel-base catalyst used for autothermal reforming of ethanol for producing hydrogen and preparation method thereof
  • Nickel-base catalyst used for autothermal reforming of ethanol for producing hydrogen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 4.410 grams of Ni (NO 3 ) 2 ·6H 2 O, 27.402 grams of Mg (NO 3 ) 2 ·6H 2 O, 7.564 grams of Al(NO 3 ) 3 9H 2 O and 8.146 g of Fe(NO 3 ) 3 9H 2 O, add 161ml of deionized water to make solution #1. Weigh 12.905 grams of NaOH and 2.137 grams of NaOH 2 CO 3 , was added to 343ml of deionized water to prepare solution #2. Subsequent steps were the same as those in Reference Example 1 to obtain catalyst CUT-ATR-NF-201. The weight composition of the catalyst is as follows: the content of nickel oxide is 13.2%, the content of magnesium oxide is 53.8%, the content of aluminum oxide is 12.8%, and the content of iron oxide is 21.2%.

[0032] The results of the catalyst in the ethanol autothermal reforming reaction are shown in Table 1. The reaction conditions are temperature 550°C, water / ethanol / oxygen molar ratio 3 / 1 / 0.5, normal pressure, and space velocity 11000h -1 , its ethanol conversion was stable at 100%, and its hydrogen yield was stable at about 3.7molH ...

Embodiment 2

[0034] Weigh 4.227 grams of Ni (NO 3 ) 2 ·6H 2 O, 28.223 grams of Mg(NO 3 ) 2 ·6H 2 O and 10.907 g of Al(NO 3 ) 3 9H 2 O, measure the weight ratio of 4.460ml and be 50% Mn (NO 3 ) 2 Solution, add 166ml of deionized water to make solution #1. Weigh 13.292 grams of NaOH and 2.201 grams of NaOH 2 CO 3 , was added to 353ml of deionized water to prepare solution #2. Subsequent steps were the same as in Reference Example 1 to obtain catalyst CUT-ATR-NM-201. The weight composition of the catalyst is as follows: the content of nickel oxide is 13.4%, the content of magnesium oxide is 54.9%, the content of aluminum oxide is 18.3%, and the content of manganese dioxide is 13.4%.

[0035] The results of the catalyst in the ethanol autothermal reforming reaction are shown in Table 1. The reaction conditions are temperature 550°C, water / ethanol / oxygen molar ratio 3 / 1 / 0.5, normal pressure, and space velocity 11000h -1 , the ethanol conversion rate was 100%, and the hydrogen prod...

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Abstract

The invention relates to a nickel-based catalyst used for the autothermal reforming of ethanol for producing hydrogen and a preparation method thereof. Aiming at the problems of structural change, oxidation and sintering of active ingredients and deactivation of the conventional catalyst during the autothermal reforming of the ethanol, the invention provides a novel catalyst with a stable structure, sintering resistance, carbon deposit resistance, oxidation resistance and high activity. The chemical formula of the catalyst is NiaMgbAlcXdO4.5+ / -delta, wherein X is an auxiliary agent Fe or Mn, a is 0.25 to 0.40, b is 2.6 to 2.75, c is 0.1 to 0.8 and d is 0.2 to 0.9. A brucite-based (Mg(OH)2.mH2O) hydrotalcite structure is taken as a precursor, so that the active ingredient nickel and the auxiliary agent heteroion component are introduced into a laminated structure and a position between laminated structures; meanwhile, the auxiliary agent iron or magnesium is introduced, so the reducibility and stability of the active ingredients of the catalyst are improved, and the yield of the hydrogen is obviously improved and remains stable.

Description

technical field [0001] The invention relates to a nickel-based catalyst for producing hydrogen by autothermal reforming of ethanol and a preparation method thereof, more specifically, a nickel-based catalyst for producing hydrogen by autothermal reforming of ethanol with a hydrotalcite structure as a precursor The invention relates to a base catalyst and a preparation method thereof, belonging to the technical field of producing hydrogen by autothermal reforming of ethanol. Background technique [0002] Hydrogen is an important energy carrier. The production of hydrogen from traditional resources such as coal and natural gas will lead to an increase in the level of carbon dioxide in the atmosphere. Hydrogen can be produced from biomass ethanol, which can be obtained from renewable resources such as biomass such as starch and cellulose. Through this approach, the carbon dioxide released in the production of hydrogen from ethanol is converted from plants to biomass through ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/889C01B3/40
CPCY02P20/52
Inventor 黄利宏
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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