Poison-resistant layered granular catalyst and preparation method thereof

A catalyst and anti-toxic technology, applied in the field of anti-toxic layered granular catalyst and its preparation, can solve the problems of easy poisoning

Pending Publication Date: 2022-01-07
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the technical problem that perovskite catalysts are easily poisoned during the use process in the prior art, a kind of anti-toxic layered granular catalyst and its preparation method are provided, and further, the technical problem of how to ensure the catalytic efficiency after taking anti-poisoning measures , by forming a cladding layer containing pores on the outer layer of the catalyst core containing catalytically active components, to improve the above technical problems

Method used

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  • Poison-resistant layered granular catalyst and preparation method thereof
  • Poison-resistant layered granular catalyst and preparation method thereof
  • Poison-resistant layered granular catalyst and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0041] A kind of anti-toxic layered granular catalyst of this embodiment, the specific parameters are reflected in its preparation process, and its specific preparation process is as follows:

[0042] Step 1, preparation of perovskite type composite oxide powder.

[0043] (1) Preparation of powder precursor: Weigh 0.1mol of cerium nitrate, 0.1mol of manganese acetate and 0.15mol of citric acid and dissolve them in 1000ml of deionized water. After completely dissolving, stir at 90°C at a speed of 250r / min, and stir the mixture for 4h It appears as a colloid, baked in an oven at 105°C for 24 hours to obtain a dry precursor, and grinds the dried precursor powder to obtain a precursor powder with a mesh size of less than 400;

[0044] (2) Precursor calcination: The precursor powder is roasted in a muffle furnace, and the temperature is raised to 300°C at a heating rate of 10°C / min in an air atmosphere, kept for 1h, and then heated to 1000°C at a heating rate of 2°C / min. ℃ and kee...

Embodiment 2

[0070] This embodiment is used as a benchmark experiment, and the experimental process of this comparative example is the same as that of Example 1, except that: (4) powder modification in step one is not adopted, and all steps of step two are not adopted. The experimental results are recorded in Table 3 as a benchmark for later experiments.

[0071] table 3

[0072]

Embodiment 3

[0074] The experimental process of this embodiment is the same as that of Example 1, except that: (4) powder modification in step 1 is not used, and cerium nitrate is not added in the preparation of mixed solution B in step 2 (2). The experimental results are recorded in Table 4.

[0075] Table 4

[0076]

[0077]

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Abstract

The invention discloses a poison-resistant layered granular catalyst and a preparation method thereof, and relates to the technical field of catalysts. The catalytic efficiency of the poison-resistant layered granular catalyst is ensured by forming a coating layer containing pores on the outer layer of a catalyst core containing catalytic active components. Poisoning substances such as SO2, H2O and alkali metal can be prevented from being in direct contact with active substances. The catalyst has good SO2, H2O and alkali metal poisoning resistance.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and more specifically relates to a poison-resistant layered granular catalyst and a preparation method thereof. Background technique [0002] A large amount of volatile organic pollutants (VOCs), dioxins (PCDD / Fs) and CO enter the atmosphere every year from industrial coal combustion flue gas, which has a serious impact on the global environment. VOCs can cause environmental problems such as photochemical smog and the greenhouse effect, while dioxin is a type of highly toxic substance that can cause huge damage to the human body and cause cancer and deformity. CO can combine with hemoglobin and cause biological poisoning and death. The above-mentioned pollutants all have certain reducibility, and the perovskite-type composite oxide can be used as a catalyst to efficiently degrade the above-mentioned pollutants through catalytic combustion. However, flue gas generally contains a large amount of...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J33/00B01D53/86B01D53/72B01D53/70B01D53/44
CPCB01J23/002B01J23/34B01J33/00B01D53/8662B01D53/8687B01D53/8668B01D2257/708B01D2257/206
Inventor 龙红明钱立新丁龙魏进超顾明言徐辉杨本涛陈萍王光应
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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