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Catalyst for decomposing nitrous oxide, preparation method of catalyst and nitrous oxide decomposition method

A nitrous oxide and catalyst technology, applied in the direction of nitrous oxide capture, metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, etc., can solve the problem of reducing operating costs and short catalyst life cycles Easy deactivation, reducing initial equipment investment, etc., to achieve the effect of reducing operating costs, increasing long-term stability, and low cost

Pending Publication Date: 2021-11-05
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In view of the problems existing in the prior art, the present invention provides a catalyst for decomposing nitrous oxide and its preparation method and a method for decomposing nitrous oxide, which solves the problem that the catalyst in the prior art has a short service life and is easily deactivated. At the same time, the initial equipment investment is reduced, and steam can be produced as a by-product, reducing operating costs

Method used

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  • Catalyst for decomposing nitrous oxide, preparation method of catalyst and nitrous oxide decomposition method
  • Catalyst for decomposing nitrous oxide, preparation method of catalyst and nitrous oxide decomposition method
  • Catalyst for decomposing nitrous oxide, preparation method of catalyst and nitrous oxide decomposition method

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Embodiment 1

[0067] This embodiment provides a preparation method for a catalyst for decomposing nitrous oxide. The preparation method comprises: taking 0.4mol of cobalt acetate, 0.05mol of potassium hydroxide, 0.3mol of calcium hydroxide, 0.35mol of zinc oxide, and 5g of scallop powder Mix with 152g yttrium acetate-modified pseudo-boehmite (1mol alumina, 0.01mol yttrium acetate-modified) and knead with 70ml (containing 10ml formic acid and 5ml citric acid) aqueous solution, extrude 2mm strips, 120°C Drying for 12 hours, calcining at 800° C. for 6 hours, the molar ratio of catalyst components cobalt:potassium:calcium:zinc:yttrium:aluminum=0.4:0.05:0.3:0.35:0.01:2 was obtained. Denoted as catalyst I, the figure of the catalyst I is as follows figure 1 shown.

Embodiment 2

[0069] This embodiment provides a preparation method of a catalyst for decomposing nitrous oxide. The preparation method comprises: taking 0.3 mol of ferric hydroxide, 0.02 mol of strontium hydroxide, 0.3 mol of magnesium carbonate, 0.5 mol of basic zinc carbonate, 10 g of formazan Base cellulose and 153g of yttrium acetate-modified pseudoboehmite (1mol alumina, 0.02mol of yttrium acetate modification) were mixed and kneaded with 70ml (containing 5ml of formic acid and 15ml of citric acid) aqueous solution, extruding a 2mm strip , dried at 120°C for 12h, and calcined at 800°C for 6h to obtain the catalyst component molar ratio iron:strontium:magnesium:zinc:yttrium:aluminum=0.3:0.02:0.3:0.5:0.02:2, denoted as catalyst II.

Embodiment 3

[0071] This embodiment provides a preparation method of a catalyst for decomposing nitrous oxide, the preparation method comprising: taking 0.2mol nickel acetate, 0.03mol sodium hydroxide, 0.4mol magnesium carbonate, 0.5mol basic zinc carbonate, 10g methyl Cellulose and 153g of neodymium acetate-modified pseudo-boehmite (1mol alumina, 0.02mol of neodymium acetate modification) were mixed and kneaded with 80ml (containing 10ml formic acid and 10ml citric acid) aqueous solution, extruding 2mm strips, Drying at 120°C for 12 hours, and calcining at 800°C for 12 hours, the molar ratio of catalyst components nickel:sodium:magnesium:zinc:neodymium:aluminum=0.2:0.03:0.4:0.5:0.02:2 was obtained, which was designated as catalyst III.

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Abstract

The invention provides a catalyst for decomposing nitrous oxide, a preparation method of the catalyst and a nitrous oxide decomposing method. The catalyst simultaneously comprises oxide of transition metal, an auxiliary agent, a modified element and a binder, the auxiliary agent comprises any one or a combination of at least two of an alkali metal oxide, an alkaline earth metal oxide, a lanthanum oxide, a cerium oxide or a zinc oxide; the modified element comprises yttrium element and / or neodymium element; and the binder comprises silicon oxide and / or aluminum oxide. The catalyst is high in activity, good in temperature resistance and excellent in cycle stability, the preparation method is a one-step synthesis method, the preparation process is simple and pollution-free, the decomposition method is low in bed temperature, additional heating of gas is not needed, high-quality steam is produced as a byproduct, and the operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of dinitrogen monoxide decomposition, more specifically, a method for catalyzing the decomposition of dinitrogen monoxide to generate nitrogen and oxygen by using oxides of transition metals as catalysts, in particular to a catalyst for decomposing dinitrogen monoxide and Its preparation method and the decomposition method of nitrous oxide. Background technique [0002] Nitrous oxide (N 2 O) has long been considered as a gas that is harmless to the environment and is widely used in fields such as industry and medicine. In recent years, with the 2 With the in-depth cognition and research of O, its environmental hazards have been recognized. N 2 O can not only destroy the ozone layer, but also an important greenhouse gas, its global warming potential value is respectively 2 310 times and CH 4 21 times. [0003] Currently the CO 2 、CH 4 , N 2 O, O 3 The emission reductions of six greenhouse gases, in...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01D53/86B01D53/56
CPCB01J23/83B01J23/002B01D53/8628B01J2523/00B01D2257/402B01D2256/10B01D2256/12B01J2523/13B01J2523/23B01J2523/27B01J2523/31B01J2523/36B01J2523/845B01J2523/22B01J2523/24B01J2523/842B01J2523/12B01J2523/3725B01J2523/847B01J2523/17B01J2523/25B01J2523/41Y02C20/10
Inventor 唐建远闻志鹏黄雍李志国王付彤于彬谢毅赵风轩张元华陈恩之唐丽华崔燕军唐劲松
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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