(1) Catalytic decomposition: The catalyst used for catalytic decomposition is an acidic heat-resistant catalyst capable of releasing hydrogen nuclei, and the decomposition temperature is about 500 ° C; commonly used solid oxides are: silica and alumina, artificial zeolite, silica and Magnesium oxide, silica and zirconia, alumina and boria, silica and titania, acid clay and activated clay. For example, a mixture of polyethylene, polypropylene, polystyrene and polyvinyl chloride is catalytically decomposed at 300-450 ° C, and iron and silica-based catalysts are preferred, and the gasification rate can be greatly improved. When added, the decomposed oil is modified, and the calorific value increases when burned. 1 hydrogenation-dehydrogenation catalysis. The catalyst employed is a bifunctional catalyst consisting of two components of oxygenation-dehydrogenation. In particular, the addition of a dehydrogenation catalyst makes it easy to produce a positive carbon ion by an olefin and has a function of lowering the reaction temperature. Such catalysts are platinum-silica and alumina, vanadium-zeolite, nickel-silica and alumina, nickel sulfide-silica and alumina, cobalt sulfide-molybdenum sulfide-silica and alumina, and the like. Generally, hydrocarbons are hydrolyzed to obtain a plurality of saturated hydrocarbons. 2 steam modification. In the process of preparing methane from higher hydrocarbons, the hydrodecomposition has a large calorific value. In order to solve the carbon precipitation and prevent the catalyst from aging, steam reforming can greatly improve the methanation efficiency. The catalyst is mainly nickel, and the carrier is made of a heat-resistant material such as magnesium oxide, aluminum oxide, silica or diatomaceous earth. Jewelry Microscope,Trinocular Digital Microscope,Professional Jewelry Microscopes,Stereo Binocular Jewelry Microscope Ningbo Huaguang Precision Instrument Co., Ltd. , https://www.hgopt.com
Analysis of Catalytic Decomposition of Waste Plastics