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Super-high-temperature ammonia decomposition catalyst for coke oven gas purification and preparation method of catalyst

A coke oven gas and ultra-high temperature technology, applied in the field of refractory, can solve problems such as coking, and achieve the effects of simple formula, high hardness and high shock resistance

Inactive Publication Date: 2019-05-21
无锡市强亚耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, during the development of this system, the MEQ-1 catalyst appeared coking phenomenon under high temperature calcination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 80 parts of magnesium-aluminum hydrotalcite composite oxide, 160 parts of sodium chloride and 10 parts of magnesium oxide by mass fraction, and sieve magnesium-aluminum hydrotalcite composite oxide and magnesium oxide respectively to obtain powder; The hydrotalcite composite oxide powder is calcined at 850°C for 3 hours, the roasted product is mixed with sodium chloride, and water with 5% of the total mass of the mixture is added to prepare a mixed solution, nitrogen gas is introduced at 80°C, and the reaction is purified by stirring. After 30h, let stand to cool and wash to remove Cl - , AgNO 3 Check to no Cl - , after vacuum drying, the magnesia-aluminum spinel sample is obtained; the magnesia powder is mixed with the magnesia-alumina spinel sample prepared above evenly, pre-fired at 1400°C for 16 hours, and pressed into carrier semi-finished particles after cooling, and the carrier semi-finished product Calcined at 1400°C for 20 hours, cooled to obtain a cata...

Embodiment 2

[0021]Get 120 parts of magnesium-aluminum hydrotalcite composite oxide, 240 parts of sodium chloride and 15 parts of magnesium oxide by mass fraction, and sieve magnesium-aluminum hydrotalcite composite oxide and magnesium oxide respectively to obtain powder; The hydrotalcite composite oxide powder is calcined at 850°C for 3 hours, the calcined product is mixed with sodium chloride, and water with 10% of the total mass of the mixture is added to prepare a mixed solution, nitrogen gas is introduced at 85°C, and the reaction is purified by stirring. After 32h, let stand to cool and wash to remove Cl - , AgNO 3 Check to no Cl - , after vacuum drying, the magnesia-aluminum spinel sample is obtained; the magnesia powder is mixed evenly with the magnesia-alumina spinel sample prepared above, pre-fired at 1500°C for 20 hours, and pressed into carrier semi-finished particles after cooling, and the carrier semi-finished product Calcined at 1450°C for 24 hours, cooled to obtain a cat...

Embodiment 3

[0023] Get 100 parts of magnesium-aluminum hydrotalcite composite oxide, 200 parts of sodium chloride and 12.5 parts of magnesium oxide by mass fraction, and sieve magnesium-aluminum hydrotalcite composite oxide and magnesium oxide respectively to obtain powder; The hydrotalcite composite oxide powder is calcined at 820°C for 2 hours, and the calcined product is mixed with sodium chloride, and 8% of the total mass of the mixture is added to prepare a mixed solution. Nitrogen gas is introduced at 80°C, and the reaction is purified by stirring. After 30h, let stand to cool and wash to remove Cl - , AgNO 3 Check to no Cl - , after vacuum drying, the magnesia-alumina spinel sample is obtained; the magnesia powder is mixed with the above-mentioned magnesia-alumina spinel sample evenly, pre-fired at 1450°C for 16 hours, cooled and pressed into carrier semi-finished particles, and the carrier semi-finished product Calcined at 1425°C for 20 hours, cooled to obtain a catalyst carrie...

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Abstract

The invention discloses a super-high-temperature ammonia decomposition catalyst for coke oven gas purification. According to the catalyst, a magnalium hydrotalcite composite oxide, sodium chloride andmagnesium oxide are dissolved, mixed and roasted into a catalyst carrier, then the catalyst carrier is dipped with a mixed solution of cobalt nitrate, nickel nitrate and copper nitrate, and the catalyst is prepared. Meanwhile, the invention further discloses a preparation method of the super-high-temperature ammonia decomposition catalyst. According to the catalyst, the anti-pulverization performance, falling resistance and pressure-resistant strength of the catalyst under the condition of high water vapour content can be improved, and meanwhile the anti-coking performance of the catalyst isfurther improved.

Description

technical field [0001] The invention belongs to the field of fire resistance, and in particular relates to an ultra-high temperature ammonia decomposition catalyst used in coke oven gas purification and a preparation method thereof. Background technique [0002] Maanshan Iron and Steel Coal Coking Co., Ltd. introduced the vacuum potassium carbonate desulfurization process and single-stage Claus technology of German ThyssenKrupp Group Uhde in the coke oven gas desulfurization unit project of the transformation and structural adjustment coking system project. The process uses spray saturator to produce ammonium sulfate, supporting vacuum potassium carbonate desulfurization and Claus to produce elemental sulfur gas purification process. In this process, the acid vapor from the desulfurization section enters the Claus reactor, and a burner is installed at the inlet section of the reactor. One-third of the acid vapor enters the burners on the Claus furnace, H 2 Combustion of S ...

Claims

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Application Information

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IPC IPC(8): B01J23/78C10K1/34
Inventor 唐震王雪波沈立嵩
Owner 无锡市强亚耐火材料有限公司