阅读说明：本技术 一种沸石负载金属型消氢和除氚催化剂及其应用 (Zeolite-supported metal type catalyst for dehydrogenation and tritium removal and application thereof ) 是由 肖超 杨勇 谭昭怡 于 2019-09-03 设计创作，主要内容包括：本发明公开了一种沸石负载金属型消氢和除氚催化剂及其应用。催化剂的组成为Metal/zeolite,沸石为载体,贵金属为活性组分,贵金属的重量百分比小于等于10%。本发明的沸石负载金属型消氢和除氚催化剂是一种在低浓度氢/氚条件下,室温反应活性高、抗水汽性能好的无机消氢/除氚贵金属催化剂,可以灵活方便地应用于核电站非能动消氢、蓄电池消氢、含氚场所的辐射防护。(The invention discloses a zeolite-supported metal type dehydrogenation and tritium removal catalyst and application thereof. The catalyst is composed of Metal/Zeolite, zeolite as carrier, noble Metal as active component, and the weight percentage of noble Metal is less than or equal to 10%. The zeolite-supported metal type dehydrogenation and tritium removal catalyst is an inorganic dehydrogenation/tritium removal noble metal catalyst which has high room-temperature reaction activity and good water vapor resistance under the condition of low-concentration hydrogen/tritium, and can be flexibly and conveniently applied to passive dehydrogenation of nuclear power stations, dehydrogenation of storage batteries and radiation protection of tritium-containing places.)

1. A zeolite-supported metal type dehydrogenation and tritium removal catalyst is characterized in that: the catalyst comprises zeolite and precious metal, wherein the zeolite is a carrier, the precious metal is an active component, and the weight percentage of the precious metal is less than or equal to 10%;

The zeolite is composed of [ SiO ]₂]_x[AlO₄]_yM_zM is a metal cation or proton, X is Y = (100 ~ ∞): 1, Z = Y/V, and V is the valence state of the metal cation M;

The noble metal comprises one or more of Pt, Pd, Ag or Au.

2. The zeolite-supported metal-type dehydrogenation and tritium removal catalyst of claim 1, characterized in that: the zeolite has a crystal structure of one or more of MFI, BEA, FAU, MEL, AFI, MEL, CFI, CHA, ITW, MTN, SAS, STF and LTA.

3. The zeolite-supported metal-type dehydrogenation and tritium removal catalyst of claim 1, characterized in that: the shape of the zeolite is one or more of powder, particles, cylinders and irregular bodies.

4. The zeolite-supported metal-type dehydrogenation and tritium removal catalyst of claim 1, characterized in that: the zeolite is loaded on a structured carrier, and the structured carrier is one or more of cordierite, oxide, metal mesh and metal fiber.

5. The zeolite-supported metal-type dehydrogenation and tritium removal catalyst of claim 1, characterized in that: the synthesis method of the zeolite is one of a hydrothermal method, a dry glue conversion method, a solvothermal method and an ionothermal method.

6. The zeolite-supported metal-type dehydrogenation and tritium removal catalyst of claim 1, characterized in that: the noble metal is loaded by one of an impregnation method, an ion exchange method, a deposition-precipitation method or a chemical vapor deposition method.

7. The application of a zeolite-supported metal type dehydrogenation and tritium removal catalyst is characterized in that: the catalyst is applied to passive dehydrogenation of nuclear power stations, dehydrogenation of storage batteries and radiation protection of tritium-containing places.

Technical Field

the invention belongs to the technical field of tritium removal catalysts and dehydrogenation catalysts, and particularly relates to a zeolite-supported metal type dehydrogenation and tritium removal catalyst and application thereof.

Background

Tritium is one of hydrogen isotopes, is a radioactive nuclide with strong mobility, and is environmentally friendlyAnd has great harm to people. So that processes involving tritium operations must perform stringent radiation protection and environmental emission requirements. The catalytic purification of tritium-containing gas is an important means of radiation protection. The catalytic purification technology combining catalytic oxidation and adsorption is a main technology, and a catalyst is the core of the catalytic purification technology. The catalyst is Pt/Al with alumina as catalyst carrier₂O₃although the organic polymer material is adopted as the carrier of the platinum catalyst (Fusion Sci. technol., 56, 141 ~ 147 (2009); J. Plasma Fusion Res. Series,9, 332 ~ 337 (2010)) can improve the room temperature reactivity and the water vapor resistance, the high temperature stability of the organic polymer carrier is poor.

For the fields of passive dehydrogenation of nuclear power stations, dehydrogenation of storage batteries and the like, the catalyst carrier Pt/Al is also made of alumina₂O₃The catalyst also has the problems of poor room temperature reactivity, particularly poor room temperature reactivity under the condition of containing water vapor and difficult start-up.

Disclosure of Invention

The invention aims to solve a technical problem of providing a zeolite-supported metal type dehydrogenation and tritium removal catalyst, and the invention aims to solve another technical problem of providing application of the zeolite-supported metal type dehydrogenation and tritium removal catalyst.

The zeolite supported metal type catalyst for dehydrogenation and tritium removal is characterized in that: the catalyst comprises zeolite and precious metal, wherein the zeolite is a carrier, the precious metal is an active component, and the weight percentage of the precious metal is less than or equal to 10%;

The zeolite is composed of [ SiO ]₂]_x[AlO₄]_yM_zM is a metal cation or proton, X is Y = (100 ~ ∞): 1, Z = Y/V, and V is the valence state of the metal cation M;

The noble metal comprises one or more of Pt, Pd, Ag or Au.

The zeolite has a crystal structure of one or more of MFI, BEA, FAU, MEL, AFI, MEL, CFI, CHA, ITW, MTN, SAS, STF and LTA.

The shape of the zeolite is one or more of powder, particles, cylinders and irregular bodies.

The zeolite is loaded on a structured carrier, and the structured carrier is one or more of cordierite, oxide, metal mesh and metal fiber.

The synthesis method of the zeolite is one of a hydrothermal method, a dry glue conversion method, a solvothermal method and an ionothermal method.

The noble metal is loaded by one of an impregnation method, an ion exchange method, a deposition-precipitation method or a chemical vapor deposition method.

the zeolite-supported metal type dehydrogenation and tritium removal catalyst is applied to passive dehydrogenation of nuclear power stations, dehydrogenation of storage batteries and radiation protection of tritium-containing places.

The zeolite-supported metal type dehydrogenation and tritium removal catalyst is an inorganic dehydrogenation/tritium removal noble metal catalyst which has high room-temperature reaction activity and good water vapor resistance under the condition of low-concentration hydrogen/tritium, and can be flexibly and conveniently applied to passive dehydrogenation of nuclear power stations, dehydrogenation of storage batteries and radiation protection of tritium-containing places.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art after reading the teachings herein, and such equivalents will fall within the scope of the appended claims.

The zeolite-supported metal type dehydrogenation and tritium removal catalyst comprises zeolite and noble metal, wherein the zeolite is a carrier, the noble metal is an active component, and the weight percentage of the noble metal is less than or equal to 10 percent;

The zeolite is composed of [ SiO ]₂]_x[AlO₄]_yM_zM is a metal cation or proton, X is Y = (100 ~ ∞): 1, Z = Y/V, and V is the valence state of the metal cation M;

The noble metal comprises one or more of Pt, Pd, Ag or Au.

the zeolite has a crystal structure of one or more of MFI, BEA, FAU, MEL, AFI, MEL, CFI, CHA, ITW, MTN, SAS, STF and LTA.

The shape of the zeolite is one or more of powder, particles, cylinders and irregular bodies.

The zeolite is loaded on a structured carrier, and the structured carrier is one or more of cordierite, oxide, metal mesh and metal fiber.

the synthesis method of the zeolite is one of a hydrothermal method, a dry glue conversion method, a solvothermal method and an ionothermal method.

The noble metal is loaded by one of an impregnation method, an ion exchange method, a deposition-precipitation method or a chemical vapor deposition method.