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X-Sn-Zr reduction catalyst, and preparation method and application thereof

A catalyst and raw material technology, applied in the field of X-Sn-Zr reduction catalyst and its preparation, can solve the problems of high desulfurization efficiency and secondary pollution, and achieve the effect of high desulfurization efficiency

Inactive Publication Date: 2019-03-29
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a X-Sn-Zr reduction catalyst and its preparation method and application. The catalyst solves the problem that the existing traditional wet desulfurization is easy to cause secondary pollution, and can realize catalytic desulfurization without generating sewage. And high desulfurization efficiency

Method used

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  • X-Sn-Zr reduction catalyst, and preparation method and application thereof
  • X-Sn-Zr reduction catalyst, and preparation method and application thereof
  • X-Sn-Zr reduction catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A kind of Cu loading is the Cu-Sn-Zr reduction catalyst of 5%, the preparation process of this catalyst is as follows:

[0061] (1) Weigh raw materials: 7.012g SnCl 4 , 2.31gZrO(NO 3 ) 2 , 0.657gCu(NO 3 ) 2 ·3H 2 O, dissolved in 100mL of distilled water;

[0062] (2) Adjust the pH value of the solution to 7 with ammonia water, then seal it with a fresh-keeping bag, then pierce about 20 holes in the fresh-keeping bag, age under stirring for six hours in a fume hood at a temperature of 40°C, and filter with suction , placed in an oven and baked at 100-300°C for 12 hours, then baked in a muffle furnace, raised the temperature from room temperature to 600°C, and kept at 600°C for 4 hours, and pressed the calcined catalyst into tablets. Catalysts with Cu loadings of 5% for 30 to 50 meshes were obtained.

Embodiment 2

[0064] The Cu-Sn-Zr reduction catalysts with Cu loadings of 10% and 20% were prepared in the same way as in Example 1, except that the added Cu(NO 3 ) 2 ·3H 2 The amount of O varies.

[0065] Table 1 is the SO of the Cu-Sn-Zr catalyst prepared by Example 1 and Example 2 of the present invention 2 conversion rate table

[0066]

[0067] Note: SO 2 Conversion = 1 - outlet SO 2 Concentration / Inlet SO 2 concentration

Embodiment 3

[0069] with SnCl 4 , ZrO(NO 3 ) 2 , Fe(NO 3 ) 3 9H 2 O is used as a raw material, and it is prepared respectively according to the iron load of 5%, 10%, and 20%, and the specific process is the same as that of the Cu-Sn-Zr catalyst.

[0070] Table 2 is the SO of the Fe-Sn-Zr catalyst prepared in Comparative Example 1 2 conversion rate table

[0071]

[0072] Note: SO 2 Conversion = 1 - outlet SO 2 Concentration / Inlet SO 2 concentration

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Abstract

The invention discloses an X-Sn-Zr reduction catalyst, and a preparation method and an application thereof. The catalyst has a structure with a formula of XnOm-SnO2-ZrO2, wherein X is selected from the group consisting of Cu and group metals thereof, and Fe; the ratio of n to m is 1: 1, or 2: 3; the catalyst is used to reduce SO2 to elemental sulfur; and the mass of XnOm in the catalyst accounts for 5% to 20% of the total mass of the catalyst. The catalyst provided by the invention can catalytically desulfurizes mixed gas containing oxygen and sulfur dioxide at 300 to 500 DEG C through prevulcanization of mixed gas of N2, CO and SO2, and has high desulfurization efficiency.

Description

technical field [0001] The invention relates to a ternary metal oxide, in particular to an X-Sn-Zr reduction catalyst and its preparation method and application. Background technique [0002] With the continuous deepening of the industrialization process of countries all over the world, SO 2 Pollution has surpassed smoke pollution to become the largest pollutant in the air environment. Flue gas desulfurization (FGD) is different from other desulfurization methods. It is the only large-scale commercial desulfurization method in the world. It is the control of acid rain and SO 2 The most effective and main technical means of pollution. [0003] All countries in the world attach great importance to flue gas desulfurization, and have developed dozens of effective desulfurization technologies, among which flue gas desulfurization technologies are widely used: [0004] (1) Lime / limestone-wet method has many advantages such as wide range of applicable coal types, cheap and easy-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835B01D53/86B01D53/50
CPCB01D53/8609B01J23/002B01J23/835B01D2258/0283B01J2523/00B01J2523/17B01J2523/43B01J2523/48B01J2523/842
Inventor 宁致远史翠林张秋林马懿星宁平
Owner YUNNAN UNIV
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