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Catalyst for processing N2O and preparation technique thereof

A catalyst and process technology, applied in the field of catalysts, can solve problems such as high cost and easy deactivation

Active Publication Date: 2014-02-19
四川五色石环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the processing of ammonia as raw material to produce HNO 3 N generated during 2 Catalysts for O gas mostly use expensive platinum, palladium and other materials, which are very expensive and easy to deactivate

Method used

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  • Catalyst for processing N2O and preparation technique thereof
  • Catalyst for processing N2O and preparation technique thereof
  • Catalyst for processing N2O and preparation technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Instruments, utensils and equipment used: precision electronic balance, 500ml beaker, cantilever mechanical stirrer; constant temperature water bath, 300°C oven, pulverizer, muffle furnace, YH-20 ring pressing machine, pre-pressing machine, granulator, pressure Measuring instrument;

[0058] Take an appropriate amount (determined by the weight of the prepared catalyst sample) of cerium nitrate, zirconium nitrate, neodymium nitrate, lanthanum nitrate, cobalt nitrate, cerium carbonate, zirconium carbonate, aluminum oxide, graphite and citric acid for use;

[0059] Measure an appropriate amount of desalted water (the amount of water is 2-2.5 times the sum of the above salts) and pour it into a beaker, and heat it to 60°C-90°C in a constant temperature water bath until it is completely dissolved;

[0060] The amount of citric acid is weighed at 1:1 of the sum of the molar amounts of the above salts, and slowly added to water preheated to 60°C-90°C under stirring until compl...

Embodiment 2

[0071] Instruments, utensils and equipment used: precision electronic balance, 500ml beaker, cantilever mechanical stirrer; constant temperature water bath, 300°C oven, pulverizer, muffle furnace, YH-20 ring pressing machine, pre-pressing machine, granulator, pressure Measuring instrument;

[0072] Take an appropriate amount (determined by the weight of the prepared catalyst sample) of cerium nitrate, zirconium nitrate, neodymium nitrate, lanthanum nitrate, cobalt nitrate, cerium carbonate, zirconium carbonate, aluminum oxide, graphite and citric acid for use;

[0073] Measure an appropriate amount of desalted water, the water weight is 2-2.5 times the sum of the above salts, and pour it into a 5000ml beaker, move it into a constant temperature water bath and heat it to 60°C-90°C;

[0074] The amount of citric acid is weighed at 1:1 of the sum of the molar amounts of the above salts, and slowly added to water preheated to 60°C-90°C under stirring until completely dissolved;

...

Embodiment 3

[0084] Instruments, utensils and equipment used: precision electronic balance, 500ml beaker, cantilever mechanical stirrer; constant temperature water bath, 300°C oven, pulverizer, muffle furnace, YH-20 ring pressing machine, pre-pressing machine, granulator, pressure Measuring instrument;

[0085] Take an appropriate amount (determined by the weight of the prepared catalyst sample) of cerium nitrate, zirconium nitrate, neodymium nitrate, lanthanum nitrate, cobalt nitrate, cerium carbonate, zirconium carbonate, aluminum oxide, graphite and citric acid for use;

[0086] Measure an appropriate amount of desalinated water, the amount of water is 2-2.5 times the total salt amount of the above-mentioned carbonate, 2 / 3 cerium nitrate, and 2 / 3 zirconium nitrate, and pour it into a 5000ml beaker, and heat it in a constant temperature water bath to 60°C-90°C;

[0087] The amount of citric acid is weighed according to the 1:1 ratio of the amount of the above-mentioned carbonate and the...

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Abstract

The invention discloses a catalyst for processing N2O. A 4f energy level with rich rare earth elements is used for selecting 2, 3 or 4 elements in La system elements and selecting 1 or 2 elements in a VIII race; the catalyst is prepared by using Al2O3 as a skeleton or isolator, citric acid as a dispersant and water as a solvent. The invention further discloses a preparation method of the catalyst. Expensive materials such as platinum and palladium are avoided, so that the preparation technique is unique; the prepared catalyst has large porosity (0.3-0.4) within 30-40%, large specific surface area and high activity.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a kind of treatment with NH 3 Production of HNO as feedstock 3 Toxic gases produced by the process - N 2 Catalyst of O and its preparation process. Background technique [0002] The mixed gas of gaseous ammonia and an appropriate amount of oxygen is catalyzed by a platinum mesh or a metal mesh catalyst doped with rhodium and palladium in platinum to generate NO and NO 2 , N 2 O and other gases. Its NO 2 By H 2 O absorption to produce HNO 3 , NO in the process, with the decrease of temperature and O 2 generate NO 2 H 2 O absorption to produce HNO 3 . But N 2 O gas can't, it can only be discharged as industrial waste gas. However, one cubic meter N 2 O, equivalent to 300m 3 CO 2 Pollution to the atmosphere; its poison to the human nervous system is CO 2 There is no comparison at all. Therefore, it is urgent to be dealt with urgently. Handle N here 2 O gas is ...

Claims

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Application Information

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IPC IPC(8): B01J23/83
Inventor 刘崇莲
Owner 四川五色石环保科技有限公司