High specific surface area silicon carbide catalyst carrier

High specific surface area silicon carbide catalyst carrier
The high specific surface area silicon carbide catalyst carrier is a high specific surface area silicon carbide catalyst carrier developed by Pingxiang Ruize Silicon Ceramics Co., Ltd., Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, and Beijing Research Institute of Chemical Industry. ℃ high temperature carbothermal reduction generates nano-scale high specific surface area silicon carbide (), which has the characteristics of high thermal stability, good thermal conductivity and high mechanical strength. Silicon carbide () has good thermal conductivity, chemical stability, thermal shock resistance, etc. Advantages, it becomes an ideal candidate material for catalyst carriers in chemical reactions. In chemical fertilizers, petrochemicals, organic chemicals, fine chemicals, and coal chemicals, it is a catalyst for direct liquefaction. Silicon carbide with a high specific surface area is considered a good candidate in the field of catalysis. A very promising catalyst carrier, the main component is high-purity nanoscale high specific surface area silicon carbide (SiC), additives and binders are mixed and sintered at high temperature. The appearance color is green spherical, ring-shaped, honeycomb-shaped, with a packing density. Its specific surface area can reach ~ or above. Currently, oxides such as alumina and silicon oxide are mainly used as catalyst carriers. Such carriers will reduce the activity and life of the catalyst under some harsh reaction conditions, such as high temperature and high pressure, strong acidity, and when the raw materials contain many impurities. The short alumina carrier has relatively active chemical properties and is easy to interact with active components, changing the performance of the catalyst. The mechanical strength is not very high, and it is easily broken during loading and transportation. In addition, during the regeneration process of the catalyst, due to the thermal conductivity of the alumina and silica carriers The performance is not excellent, and it is easy to cause the catalyst active components to sinter due to temperature fluctuation. Activated carbon is also used as a catalyst carrier due to its high specific surface area, but its main drawback is poor oxidation resistance and brittleness. Therefore, developing a new catalyst carrier that can overcome the above defects has become a new research direction. Based on the advantages of silicon carbide (SiC) such as good thermal conductivity, chemical stability, and thermal shock resistance, it has become an ideal candidate material for catalyst carriers in chemical reactions. However, currently commercially available SiC (SiC) carriers cannot be used due to their small specific surface area ( Meeting the mass transfer requirements in chemical reactions greatly limits its application. Therefore, the high specific surface silicon carbide catalyst carrier produced by Pingxiang Ruize Silicon Ceramics Co., Ltd. can greatly increase its specific surface area, and it will show a Series alumina, silicon oxide and other traditional carriers do not have the advantages: high thermal conductivity, up to ~, alumina only has high chemical stability, corrosion resistance, and is not easy to interact with active components, high mechanical strength, not easy to break The thermal expansion rate is low, in ~, is..., while aluminum oxide is...
Because the high specific surface area of silicon carbide () has some of the above advantages, it has been successfully used in some important chemical reactions: such as high temperature and low temperature desulfurization, Catalytic oxidation, methane coupling, purification of automobile exhaust, isomerization of linear alkanes, etc. It is foreseeable that high specific surface silicon carbide (), as a new type of catalyst carrier, will perform harsh reactions in some highly corrosive media, high temperatures, etc. conditions have attracted more and more attention from researchers.