E-mail:lizhi@pxball.cninert high alumina ceramic balls as catalyst support, possess numerous advantages and are widely applied in various fields. Here is the relevant introduction:
Advantages
High-temperature resistance: The aluminum oxide content in inert alumina ceramic balls is usually above 90%, and they can operate stably for a long time at temperatures above 1000°C. They can withstand various high-temperature chemical reaction processes, such as petrochemical cracking and catalytic reforming, ensuring that the catalyst maintains stable activity and structure under high-temperature conditions.
Chemical stability: It has extremely strong corrosion resistance and is not prone to react with acids, bases, salts, and various organic solvents. It can maintain its own properties stable in complex chemical environments, providing stable support and protection for the catalyst, preventing the catalyst from being eroded by chemical substances and losing its activity.
High mechanical strength: It possesses high strength, high hardness, and good wear resistance. In the reactor, it can withstand the high-speed scouring of gases and liquids as well as the pressure of catalyst particles, is not prone to breakage and wear, ensuring the integrity and stability of the catalyst carrier, and prolonging the service life of the catalyst and its carrier.
Good fluidity: The spherical shape of the balls makes them have good fluidity. They are easy to be filled and distributed in the reactor, can form a uniform bed, and are conducive to the uniform distribution of gases and liquids in the catalyst bed, improving the uniformity and efficiency of the reaction.
High specific surface area and porosity: Through special manufacturing processes, inert alumina ceramic balls can have a large specific surface area and appropriate porosity, which can increase the contact area between the catalyst and reactants, allowing reactants to more easily diffuse to the catalyst surface, thereby increasing the reaction rate and catalyst utilization.
Application fields
Petrochemical industry: In refining, catalytic cracking, hydrogenation refining and other processes, as a catalyst carrier, it helps optimize the fluid distribution within the reactor, prevent catalyst particles from escaping, and improve reaction efficiency. For example, in the reforming reactor, it can effectively protect precious metal catalysts, enabling them to perform catalytic functions better.
Chemical industry: In fixed-bed reactors used in the synthesis of ammonia, methanol, ethylene and other chemical production processes, it can not only enhance heat and mass transfer efficiency, but also reduce pressure drop, lower energy consumption, and enable reactions to proceed more efficiently.
Environmental protection field: In environmental protection projects such as flue gas desulfurization and volatile organic compound catalytic combustion, as a catalyst carrier, it can improve the efficiency of waste gas treatment, help remove harmful gases, reduce pollutant emissions, extend the service life of catalysts, and lower the operating costs of environmental protection equipment.
Factors Affecting Catalytic Performance
Microstructure of ceramic balls: including pore size distribution, pore volume and specific surface area, etc. A smaller and more uniform pore size distribution is conducive to the diffusion and adsorption of reactant molecules, while a larger pore volume and specific surface area can provide more active sites, thereby increasing the catalytic reaction rate.
Surface properties: The acidity and basicity of the ceramic ball surface, as well as active groups, can affect the interaction between the catalyst and the carrier, as well as the adsorption and activation of reactants on the carrier surface. By modifying the surface of the ceramic balls, their surface properties can be adjusted to meet different catalytic reaction requirements.
Loading amount: The loading amount of the catalyst on the inert high-alumina ceramic balls directly affects the catalytic activity. A low loading amount results in insufficient active sites and low catalytic efficiency; a high loading amount may cause catalyst particles to aggregate and cover the active sites, thereby reducing the catalytic performance.
