Layered perovskite catalyst for hydrogen generation from acetic acid autothermal reforming and preparation method

An autothermal reforming and perovskite-type technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of catalyst deactivation and achieve hydrogen High yield, improved reducibility, good thermal stability

Active Publication Date: 2017-08-15
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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  • Layered perovskite catalyst for hydrogen generation from acetic acid autothermal reforming and preparation method

Examples

Experimental program
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Effect test

example 1

[0028] Weigh 8.6494 grams of La(NO 3 ) 3 ·6H 2 O and 2.9044 g of Ni(NO 3 ) 2 ·6H 2 O, add 30ml of deionized water to prepare 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 prepare solution #2; then weigh 1.8599 grams of ethylene glycol (CH 2 Oh) 2 ; Slowly add solution #1 and ethylene glycol dropwise to solution #2, and stir at 70°C for 4 hours, the solution gradually turns into a colloid, and transfer to a drying oven to dry at 105°C for 12 hours. Put the dried sample into a porcelain boat, put it into a tube furnace, raise the temperature to 700°C at a rate of 10°C / min, keep it at 700°C for 6 hours, and observe it with a scanning electron microscope and an X-ray diffractometer. The catalyst CDUT-LN with a layered perovskite structure was obtained with a molar composition of La 2 NiO 4 , and its typical XRD spectrum is attached figure 1 shown. The weight composition of the catalyst is as follows: the conten...

Embodiment 1

[0032] Weigh 5.8979 grams of La(NO 3 ) 3 ·6H 2 O,, 3.908 g of Ni (NO 3 ) 2 ·6H 2 O and 3.2165 g of Ca(NO 3 ) 2 4H 2 O, add 30ml of deionized water to make solution #1. Weigh 8.5863 g of C 6 h 8 o 7 ·H 2 O, add 30ml of deionized water to make solution #2. Weigh again 2.5362 grams of (CH 2 Oh) 2 . Slowly add solution #1 and ethylene glycol dropwise to solution #2, and stir at 70°C for 4 hours, the solution gradually turns into a colloid, and transfer to a drying oven to dry at 105°C for 12 hours. Put the dried sample into a porcelain boat, put it into a tube furnace, raise the temperature to 700°C at a rate of 10°C / min, keep it at 700°C for 6 hours, and obtain a CDUT with a layered perovskite structure- LC10N catalyst with a molar composition of LaCaNiO 4 , its XRD spectrum is attached figure 1 As shown, the results show that the layered perovskite structure is still formed after the addition of additive Ca. The weight composition of the catalyst is as follows...

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 g of Ca(NO 3 ) 2 4H 2 O, add 30ml of deionized water to make solution #1. Weigh out 10.4965 g of C 6 h 8 o 7 ·H 2 O, add 30ml of deionized water to make solution #2. Weigh again 3.1004 grams of (CH 2 Oh) 2 . Slowly add solution #1 and ethylene glycol dropwise to solution #2, and stir at 70°C for 4 hours, the solution gradually turns into a colloid, and transfer to a drying oven to dry at 105°C for 12 hours. Put the dried sample into a porcelain boat, put it into a tube furnace, raise the temperature to 700°C at a rate of 70°C / min, keep it at 700°C for 6 hours, and obtain a CDUT with a layered perovskite structure- LC15N catalyst with a molar composition of La 0.5 Ca 1.5 NiO 4 , by XRD test, the results show that the catalyst forms a layered perovskite structure, accompanied by a small amount of calcium oxide phase. 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 hydrogen production by autothermal reforming of acetic acid and a preparation method thereof, belonging to the field of hydrogen production 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 to traditional fossil fuels has become an urgent goal in today's world. Hydrogen is an important chemical raw material and a clean energy, which 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 transformation of fossil resources such as coal and natural gas, which has brought about environmental pollution problems. To realize the efficient and long-term utilization of hydrogen energy, the primary problem to be solved is to find clean, cheap...

Claims

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Application Information

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Patent Type & Authority Applications(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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