Preparation method of catalyst for removing tritium in tritium-containing air

Abstract

A disclosed preparation method of a catalyst for removing tritium in tritium-containing air comprises: (1) adding aluminium isopropoxide into distilled water and stirring for hydrolysis; (2) adding a peptizing agent to enable the hydrolysis solution to be colloidal, and performing stirring refluxing to obtain an aluminium oxide sol; (3) using honeycomb ceramic as a catalyst matrix and immersing in a diluted nitric acid solution, and then taking out, cleaning and baking; (4) mixing active aluminium oxide powder and the aluminium oxide sol, and performing ball milling to form a slurry; (5) uniformly coating the catalyst matrix with the slurry, and then baking and weighing; (6) repeating the step (5) until the weight gain of the catalyst matrix is 12%-20%; (7) adding diluted nitric acid into a noble metal solution, and mixing with stirring; and (8) immersing the catalyst matrix in the mixed solution to enable the catalyst matrix to absorb the mixed solution to reach a saturation state, and then roasting, so as to obtain the catalyst. The preparation method helps to substantially improve the processing capacity of the catalyst on gases without increasing the gas resistance of the tritium-removal system.

Description

technical field [0001] The invention relates to a catalyst, in particular to a preparation method for a catalyst used for removing tritium from tritium-containing air. Background technique [0002] Tritium is a kind of hydrogen isotope, which is a strategic substance, not only expensive, but also not easy to obtain; at the same time, tritium is a highly mobile radionuclide, its leakage will not only pollute the environment, but also It is also very harmful to the human body. Therefore, any process involving tritium operation must implement strict radiation protection and environmental discharge requirements. According to the current safety concept, tritium facilities should establish a triple containment system, and at the same time use a combination of physical shielding and detritium purification to solve the problem of the effectiveness of tritium containment. Purifying the tritium-containing atmosphere is a necessary means to establish safe production, and at the same ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a catalyst for tritium-containing air to remove detritium, mainly to solve the problem that the existing detritium removal catalyst easily causes the air resistance of the detritium removal system to increase

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