Preparation of catalyst with carrier of ceria-zirconia solid solution and application of catalyst in NOx removal

A cerium-zirconium solid solution and catalyst technology, applied in the selective catalytic oxidation of NO, the preparation of supported transition metal chromium, and the field of catalyst preparation, can solve the problems of complicated methods and complicated preparation methods, and achieve simplified preparation conditions and simplified The effect of the preparation step, promoting the probability of being oxidized
CN102716737AActive Publication Date: 2012-10-10NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2012-10-10

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Abstract

The invention relates to a preparation method of a catalyst i.e., supported transition metal chrome with a carrier of a ceria-zirconia solid solution, and application of the catalyst in selectively catalytic oxidizing NO in flue gases. The preparation method of the catalyst comprises the following steps: 1, that cerium nitrate and zirconium oxychloride are dissolved in deionized water and stirred, and are dried and calcinated after fully reaction, thereby obtaining the carrier of the ceria-zirconia solid solution; and 2, that chromic nitrate and the ceria-zirconia solid solution are dissolved in water and stirred, and are dried and calcinated after fully reaction, thereby obtaining the catalyst Cr / CexZr1-xO2. The catalyst prepared in the invention increases superoxide radicals to the carrier which is used for catalytic oxidizing NO, thereby assisting migration and diffusion of bulk phase oxygen, and facilitating the NO to be oxidized on carrier surface. Thus, the catalyst has good capability of catalytic oxidizing NO.
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Description

technical field

[0001] The invention relates to a catalyst preparation method and its application, in particular to a preparation method of transition metal chromium supported by cerium-zirconium solid solution and its application in selective catalytic oxidation of NO in flue gas, which belongs to inorganic chemical field.

[0002] Background technique

[0003] At present, my country's energy consumption is increasing rapidly, and the number of motor vehicles is increasing year by year. NO x Emissions continue to rise, and the type of acid rain has changed from sulfuric acid to compound sulfuric acid and nitric acid. With SO 2 Removal technology is becoming more and more mature, NO x Removal has become a hot research topic.

[0004] So far applied to NO x Various methods of removal include: Selective Catalytic Reduction (SCR), Continuous Regeneration Replenishment (CRT), NO x Storage and reduction (NSR) and wet denitrification, etc., these methods have in common that...

Claims

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