Preparation method of carbon-containing alumina carrier

Abstract

The invention discloses a preparation method of a carbon-containing alumina carrier. The preparation method of the carbon-containing alumina carrier comprises the following steps: (1) activating the alumina carrier, cooling the alumina carrier, immersing the alumina carrier in an aqueous solution containing low-carbon alcohol, furfuryl alcohol and organic dibasic acid for immersion treatment, and separating the carrier after the immersion treatment is finished; and (2) drying the carrier obtained in the step (1), and roasting in an inert atmosphere to obtain the carbon-containing alumina carrier. According to the carbon-containing alumina carrier, the carbon content is flexible and controllable, carbon is uniformly distributed in the carrier, and the interaction strength of the carrier and loaded active metal can be reduced. The method is simple and feasible, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of inorganic material preparation, and relates to a preparation method of a carbon-containing alumina carrier. Background technique [0002] Alumina is widely used in heterogeneous catalyst supports, and the properties of alumina supports are one of the key factors that determine the performance of catalysts. [0003] In the catalyst, alumina carrier not only plays the role of dispersing active metals, but also its own surface acidity, interaction with active metals and other effects can greatly affect the morphological structure and stability of active components. [0004] Therefore, taking various measures to modify the support is an important way to improve the catalyst performance. Carbon materials have the characteristics of high specific surface area, good physical and chemical stability, and low interaction with metals, which are also widely used in the preparation of certain catalysts. However, when carbon m...

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Problems solved by technology

The sucrose molecular chain used in this method is relatively large, which is not conducive to adsorption into the fine pores in the formed alumina carrier, and due to the diffusion effect of the molecules, the sucrose has mobility during the drying process, and it is difficult to achieve carbon in the carrier after the final modification. Evenly distributed

[0009] The above-mentioned patents and documents use alumina particles as the core, and cover the carbon by cracking carbon-containing light components. Since the alumina particles are relatively large, after the outer surface of the large particles of alumina is covered with carbon, the microstructure of the alumina particles The pores are blocked, so the original inner surface of the alumina particles cannot be effectively used, and the mass and heat transfer process is affected to a certain extent

At the same time, for the carbon coating process of pyrolysis carbon source, the gas carbon source or volatile organic matter used as carbon source has safety problems in the pyrolysis process at high temperature, and a large amount of organic waste gas will be generated after pyrolysis, which may cause environmental pollution

In addition, when the above method is used on an industrial scale, it is difficult to ensure the uniformity of the carbon coating on the carrier.

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