A layered perovskite catalyst for hydrogen production by autothermal reforming of acetic acid and preparation method thereof

An autothermal reforming and catalyst technology, which is applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as catalyst deactivation, and achieve high hydrogen yield , good thermal stability, enhanced anti-coking ability

Active Publication Date: 2020-02-04
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a structurally stable, resistant A new catalyst with sintering, anti-coking, anti-oxidation, and stability

Method used

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  • A layered perovskite catalyst for hydrogen production by autothermal reforming of acetic acid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Weigh 8.6494 grams of La(NO 3 ) 3 ·6H 2 O and 2.9044 grams of Ni(NO 3 ) 2 ·6H 2 O, add 30ml of deionized water to make solution #1; then weigh 6.2966 grams of citric acid C 6 H 8 O 7 ·H 2 O, add 30ml of deionized water to make solution #2; then weigh 1.8599 grams of ethylene glycol (CH 2 OH) 2 ; Slowly add solution #1 and ethylene glycol to solution #2 dropwise, and stir at 70°C for 4 hours, the solution is gradually converted into colloid, and transferred to a drying oven at 105°C for 12 hours. Put the dried sample in a porcelain boat, put it in a tube furnace, heat it up to 700°C at a rate of 10°C / min, keep it at 700°C for 6 hours, and observe by scanning electron microscope and X-ray diffractometer. The catalyst CDUT-LN with a layered perovskite structure is obtained, and its molar composition is La 2 NiO 4 , Its typical XRD spectrum is attached figure 1 Shown. The weight composition of the catalyst is: the content of lanthanum oxide is 81.4%, and the content of nicke...

Embodiment 1

[0032] Weigh 5.8979 grams of La(NO 3 ) 3 ·6H 2 O,, 3.908 grams of Ni(NO 3 ) 2 ·6H 2 O and 3.2165 grams of Ca(NO 3 ) 2 ·4H 2 O, add 30ml of deionized water to make solution #1. Weigh 8.5863 grams of C 6 H 8 O 7 ·H 2 O, add 30ml of deionized water to make solution #2. Weigh out 2.5362 grams of (CH 2 OH) 2 . Solution #1 and ethylene glycol were slowly added dropwise to solution #2, and stirred at 70°C for 4 hours. The solution was gradually transformed into colloids and transferred to a drying oven at 105°C for 12 hours. Put the dried sample in a porcelain boat, put it in a tube furnace, raise the temperature to 700°C at a rate of 10°C / min, and keep it at 700°C for 6 hours to obtain a CDUT- with a layered perovskite structure. LC10N catalyst, its molar composition is LaCaNiO 4 , Its XRD spectrum is attached figure 1 As shown, the results show that after adding the additive Ca, a layered perovskite structure is still formed. The weight composition of the catalyst is: the content...

Embodiment 2

[0035] Weigh 3.6045 grams of La(NO 3 ) 3 ·6H 2 O,, 4.8414 grams of Ni(NO 3 ) 2 ·6H 2 O and 5.8973 grams of Ca(NO 3 ) 2 ·4H 2 O, add 30ml of deionized water to make solution #1. Weigh 10.465 grams of C 6 H 8 O 7 ·H 2 O, add 30ml of deionized water to make solution #2. Weigh 3.1004 grams of (CH 2 OH) 2 . Solution #1 and ethylene glycol were slowly added dropwise to solution #2, and stirred at 70°C for 4 hours. The solution was gradually transformed into colloids and transferred to a drying oven at 105°C for 12 hours. Put the dried sample in a porcelain boat, put it in a tube furnace, heat it up to 700°C at a rate of 70°C / min, and keep it at 700°C for 6 hours to obtain a CDUT- with a layered perovskite structure. LC15N catalyst, its molar composition is La 0.5 Ca 1.5 NiO 4 , Through the XRD test, the results showed that the catalyst formed a layered perovskite structure, accompanied by a small amount of calcium oxide phase formation. The weight composition of the catalyst is as ...

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Abstract

The invention relates to a layered perovskite catalyst for hydrogen generation from acetic acid autothermal reforming and a preparation method. A novel catalyst which is sintering resistant, carbon deposition resistant, antioxidant and high in activity is provided for the problem of catalyst deactivation due to sintering, oxidation and carbon deposition of an existing catalyst in the acetic acid autothermal reforming process. A nickel-based catalyst with an A2BO4 layered perovskite structure is prepared by employing a sol-gel method; and the chemical component is La<2-x>Ca<x>NiO<4>, wherein x is equal to 0-1.5. An oxygen defect and a lattice structure defect of the surface of the perovskite catalyst are increased through replacing lanthanum with a calcium part, and the reducibility, the heat stability and the oxidation resistance of the active component nickel are improved, so that the activity and the stability of the catalyst are improved.

Description

Technical field [0001] The invention relates to a layered perovskite-type nickel-based catalyst for producing hydrogen by autothermal reforming of acetic acid and a preparation method thereof, and belongs to the field of producing hydrogen by autothermal reforming of acetic acid. Background technique [0002] With the rapid development of human society and economy, the demand for energy continues to increase. Finding alternative energy sources for traditional fossil fuels has become an urgent goal in the world today. Hydrogen is an important chemical raw material and a clean energy. It can be used in fuel cells and is regarded as a clean energy carrier in the future. At present, the mainstream hydrogen production comes from the conversion of fossil resources such as coal and natural gas, which brings environmental pollution problems. To realize the efficient and long-term utilization of hydrogen energy, the primary problem that needs to be solved is to find a clean, cheap and ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/02B01J37/03C01B3/32
CPCB01J23/002B01J23/83B01J35/02B01J37/036B01J2523/00C01B3/326C01B2203/0227C01B2203/0233C01B2203/1058B01J2523/23B01J2523/3706B01J2523/847
Inventor 黄利宏谢伟周庆杨浩李辉谷
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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