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Perovskite catalyst used for autothermal reforming of ethanol for producing hydrogen and preparation method thereof

An autothermal reforming and catalyst technology, which is 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 reduce selectivity. , the effect of inhibiting the dehydration activity of alcohols and reducing the selectivity of ethylene

Inactive Publication Date: 2013-04-03
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 structurally stable, sintering-resistant , Anti-coking, anti-oxidation, new catalyst with stable activity

Method used

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  • Perovskite catalyst used for autothermal reforming of ethanol for producing hydrogen and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 10.669 grams of Ni (NO 3 ) 2 ·6H 2 O, 17.651 grams of La (NO 3 ) 2 ·6H 2 O and 1.649 g of Fe(NO 3 ) 3 9H 2 O, add 82ml of deionized water to make solution #1. Weigh 15.607 g of NH 2 CH 2 COOH was added to 104ml of deionized water to make solution #2. Subsequent steps were the same as those in Reference Example 1 to obtain catalyst CUT-PRV-LNF-101. The weight composition of the catalyst is as follows: the nickel oxide content is 28.2%, the dilanthanum trioxide content is 68.4%, and the ferric oxide content is 3.4%.

[0028] The activity of the catalyst is evaluated in the autothermal reforming reaction of ethanol. The reaction conditions are temperature 550°C, water / ethanol / oxygen molar ratio 3 / 1 / 0.5, normal pressure, space velocity 11000h -1 , the ethanol conversion rate is stable at 100%, while by-products such as methane and ethane are suppressed, and the hydrogen production rate is stable at about 3.2molH 2 / molEtOH, no deactivation phenomenon such...

Embodiment 2

[0030] Weigh 11.134 grams of Ni (NO 3 ) 2 ·6H 2 O, 14.738 grams of La (NO 3 ) 2 ·6H 2 O, 1.719 grams of Fe(NO 3 ) 3 9H 2 O and 1.801 g of Sr(NO 3 ) 2 , was added to 85ml of deionized water to make solution #1. Weigh 14.372 g of NH 2 CH 2 COOH was added to 104ml of deionized water to make solution #2. Subsequent steps were the same as those in Reference Example 1 to obtain catalyst CUT-PRV-LSNF-101. The weight composition of the catalyst is as follows: the content of nickel oxide is 29.7%, the content of dilanthanum trioxide is 57.6%, the content of ferric oxide is 3.5%, and the content of strontium oxide is 9.2%.

[0031] The activity of the catalyst is evaluated in the autothermal reforming reaction of ethanol. The reaction conditions are temperature 550°C, water / ethanol / oxygen molar ratio 3 / 1 / 0.5, normal pressure, space velocity 11000h -1 , the ethanol conversion rate is stable at 100%, while by-products such as methane and ethane are suppressed, and the hydrog...

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Abstract

The invention relates to a perovskite 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 sintering resistance, carbon deposit resistance, oxidation resistance and high activity. The chemical formula of the catalyst is LaaSrbNicXdO3, wherein X is one of Fe, Mn and Cr, a is 0.7 to 1.0, b is 0 to 0.3, c is 0.7 to 0.95 and d is 0.05 to 0.3. The nickel-based catalyst with an ABO3 perovskite structure is prepared by a glycine complexation method, lanthanum is partially substituted by strontium at a position A and nickel is partially substituted by an auxiliary agent at a position B, so oxygen defects and lattice structure defects on the surface of the perovskite catalyst are increased; meanwhile, the auxiliary agent, namely iron, magnesium or chromium is introduced, so the acidity of the catalyst is inhibited, 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, to a nickel-based catalyst with a perovskite structure for producing hydrogen by autothermal reforming of ethanol The invention and a preparation method thereof belong to the technical field of producing hydrogen by autothermal reforming of ethanol. Background technique [0002] Hydrogen is a clean and efficient energy carrier with a high energy density per unit mass, and its high calorific value is about 142.18MJ / kg, which is about 3.06 times that of gasoline (46.54MJ / kg). Hydrogen can be directly burned to convert hydrogen energy into heat energy; in addition, hydrogen can be directly converted into electrical energy with high efficiency through fuel cells, especially proton exchange membrane fuel cells. The production of hydrogen is traditionally produced by traditional methods such as coal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C01B3/40
CPCY02P20/52
Inventor 黄利宏
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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