High-temperature-resistant catalyst carrier and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant catalyst carrier and a preparation method thereof, belonging to the technical fields of high-temperature-resistant catalyst carrier materials and preparation thereof. The material of the high-temperature-resistant catalyst carrier is prepared by modifying three or more in a group consisting of Al2O3, ZrO2, TiO2, MgO and SiO2 via rare-earth compounds, wherein modifiers are the rare-earth oxides of rare-earth elements such as La, Ce, Nd and Sm, and have a content of 3-20%. The material of the carrier is extremely high in surface area stability, good in high-temperature resistance and high in specific surface area at a temperature above 600 DEG C and with the existence of high vapour; catalytic active constituents are loaded on the carriers, and during a high-temperature reaction, metal particles or metal oxide particles in the active constituents are not easy to sinter and stable in performance; and the catalyst has a long life. The carrier is simple in process and low in cost in preparation for a high-temperature reaction catalyst; and the prepared high-temperature carrier has a specific surface area of greater than 40 m<2> / g and a pore volume of greater than 0.2 ml / g, thus having a good application prospect.

Description

technical field [0001] The invention relates to a high-temperature-resistant catalyst carrier and a preparation method thereof, and belongs to the technical field of high-temperature-resistant catalyst carrier materials and their preparation. Background technique [0002] Many important industrial catalytic processes are carried out at high temperature, for example, steam reforming of methane to synthesis gas (a mixture of carbon monoxide and hydrogen), partial oxidation of hydrocarbons to synthesis gas, deoxygenation of oxygen-containing organic substances such as coal bed methane or catalytic combustion of organic substances, synthesis gas Reactions such as methanation to synthesize natural gas need to be carried out at high temperatures. In most cases, the catalysts used are solid catalysts, and the active catalytic components are supported on metal oxides. The catalyst supported by the usual carrier, due to the poor high temperature resistance of the carrier, at high tem...

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Problems solved by technology

However, under the conditions of high temperature, high pressure and high water vapor, the rate of surface area loss of the carrier is significantly accelerated, and its stability cannot meet the needs of industrial reactions under high temperature and high water vapor conditions.

Chinese patent CN93106324.8 has prepared a high-temperature-resistant magnesium-based catalyst carrier, which can be used for reactions under high temperature and high water vapor, but the specific surface area of ​​the catalyst carrier is less than 10m 2 / g, cannot meet the requirements of loading a large amount of active components on the carrier, and the activity of the catalyst prepared with this carrier is low

Hafnium-containing oxides are used as catalyst supports to prepare high-temperature-resistant catalyst supports and high-temperature-resistant catalysts. However, due to the high price of hafnium compounds, the cost of supports and catalysts is high, and the application is limited.

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