precious metal catalyst 贵金属催化剂

    Precious metal catalysts are highly valued for their excellent activity, selectivity and stability, and are widely used in hydrogenation, dehydrogenation, oxidation, reduction, isomerization, aromatization, cracking, synthesis and other reactions. , petrochemical, pharmaceutical, environmental protection and new energy fields play a very important role.

    The composition of homogeneous catalysts is relatively simple, usually a certain compound. The composition of supported catalysts for heterogeneous catalysis is complex, and usually consists of active metal components, cocatalysts and supports. A co-catalyst is a small amount of substance added to the catalyst, which is inactive or has little activity by itself, but can improve the performance of the catalyst. The carrier is a dispersant or support for the active component of the catalyst. The main function of the carrier is to increase the effective surface of the catalyst, provide a suitable pore structure, and ensure sufficient mechanical strength and thermal stability. Commonly used catalyst supports are Al2O3, SiO2, porous ceramics, activated carbon, etc.