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Catalyst composed of praseodymium zirconium nickel iron oxygen element and preparation method thereof

A technology of praseodymium zirconium nickel iron and element composition is applied in the field of catalyst and its preparation, which can solve the problems of unfavorable industrial application, high catalyst cost, complicated reaction process and the like, and achieves the advantages of extremely easy realization of industrial production, simple reaction operation and simple method. Effect

Inactive Publication Date: 2017-10-24
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction process of hydrogen production by ethanol reforming is complicated and there are many side reactions. It is necessary to carefully design the composition of the catalyst and prepare a catalyst with a specific lattice structure by an appropriate process in order to improve the activity and selectivity of the catalyst.
At present, some catalysts with noble metals such as platinum and rhodium as active components have shown good performance in the hydrogen production reaction of ethanol steam reforming; however, these catalysts use noble metals, and the cost of preparing catalysts is too high, which is not conducive to industrial applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A catalyst composed of praseodymium zirconium nickel iron oxygen elements, the catalyst is composed of praseodymium, zirconium, nickel, iron and oxygen elements; the chemical formula of the catalyst is (Ni 4 Fe) (Pr a Zr b ) 2 o x , wherein, a, b are the atomic ratio coefficients of praseodymium and zirconium elements in the catalyst, a=1, b=9, that is, the chemical formula of the catalyst is (Ni 4 Fe) (PrZr 9 ) 2 o x , The value of x varies with the valence state of the metal elements in the catalyst, the valence of Ni=0~2, the valence of Fe=0~3, the valence of Pr=3~4, and the valence of Zr=4.

[0028] Above-mentioned preparation method of the catalyst that is made up of praseodymium zirconium nickel iron oxygen element, this method comprises the following steps:

[0029] Weigh 3.4139 grams of praseodymium nitrate hexahydrate, 27.7802 grams of zirconium nitrate trihydrate, 4.5662 grams of nickel nitrate hexahydrate, 1.5758 grams of iron nitrate nonahydrate, add ...

Embodiment 2

[0031] A catalyst composed of praseodymium zirconium nickel iron oxygen elements, the catalyst is composed of praseodymium, zirconium, nickel, iron and oxygen elements; the chemical formula of the catalyst is (Ni 4 Fe) (Pr a Zr b ) 2 o x , wherein, a, b are the atomic ratio coefficients of praseodymium and zirconium elements in the catalyst, a=2, b=8, that is, the chemical formula of the catalyst is (Ni 4 Fe) (Pr 2 Zr 8 ) 2 o x , abbreviated as (Ni 4 Fe) (PrZr 4 ) 4 o x , The value of x varies with the valence state of the metal elements in the catalyst, the valence of Ni=0~2, the valence of Fe=0~3, the valence of Pr=3~4, and the valence of Zr=4.

[0032] Above-mentioned preparation method of the catalyst that is made up of praseodymium zirconium nickel iron oxygen element, this method comprises the following steps:

[0033] Weigh 6.6115 grams of praseodymium nitrate hexahydrate, 23.9111 grams of zirconium nitrate trihydrate, 4.4215 grams of nickel nitrate hexahyd...

Embodiment 3

[0035] A catalyst composed of praseodymium zirconium nickel iron oxygen elements, the catalyst is composed of praseodymium, zirconium, nickel, iron and oxygen elements; the chemical formula of the catalyst is (Ni 4 Fe) (Pr a Zr b ) 2 o x , where a, b are the atomic ratio coefficients of praseodymium and zirconium elements in the catalyst, a=3, b=7, that is, the chemical formula of the catalyst is (Ni 4 Fe) (Pr 3 Zr 7 ) 2 o x , The value of x varies with the valence state of the metal elements in the catalyst, the valence of Ni=0~2, the valence of Fe=0~3, the valence of Pr=3~4, and the valence of Zr=4.

[0036] Above-mentioned preparation method of the catalyst that is made up of praseodymium zirconium nickel iron oxygen element, this method comprises the following steps:

[0037] Weigh 9.6127 grams of praseodymium nitrate hexahydrate, 20.2796 grams of zirconium nitrate trihydrate, 4.2857 grams of nickel nitrate hexahydrate, 1.4883 grams of iron nitrate nonahydrate, add...

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PUM

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Abstract

A catalyst composed of praseodymium, zirconium, nickel, iron and oxygen elements relates to a catalyst and a preparation method thereof. The catalyst is composed of praseodymium, zirconium, nickel, iron and oxygen elements; the chemical formula is (Ni4Fe)(PraZrb)2Ox. The preparation method is as follows: prepare an aqueous solution of ammonium carbonate and a mixed aqueous solution of metal nitrate, add the mixed aqueous solution of metal nitrate dropwise to the aqueous ammonium carbonate solution at 10°C to 40°C, and stir vigorously at the same time. Aging, filtering; stirring and dispersing the primary precipitate with absolute ethanol, washing the primary precipitate with ultrasonic dispersion, and suction filtration; repeating the washing once; drying the final precipitate obtained; roasting at 500°C and 700°C for 2 to 4 hours respectively to obtain catalyst. The invention has good low temperature and high activity in ethanol water gas reforming reaction, high selectivity for hydrogen production, low cost and simple method.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst composed of praseodymium-zirconium-nickel-iron-oxygen elements and a preparation method thereof. Background technique [0002] As a clean energy source, hydrogen energy has attracted increasing attention. Ethanol steam reforming has many advantages for hydrogen production. First, ethanol has a wide range of sources, is non-toxic, sulfur-free, and easy to store and transport. Second, the energy efficiency of the ethanol reforming reaction system is relatively high. However, the reaction process of hydrogen production by ethanol reforming is complicated and there are many side reactions. It is necessary to carefully design the composition of the catalyst and prepare a catalyst with a specific lattice structure by an appropriate process in order to improve the activity and selectivity of the catalyst. At present, some catalysts with noble metals such as plat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C01B3/34
Inventor 吴洪达刘含智
Owner GUANGXI UNIVERSITY OF TECHNOLOGY