At present,the global dependence on plastic products was increasing year by year.However,due to the short service cycle of plastic products,if not recycled in time,it will cause greater waste of resources and environmental pollution.Polystyrene was used frequently in People's Daily production and life,and had certain recycling value.Among the existing polystyrene treatment and recovery methods,Thermal cracking technology could convert polystyrene into oil and gas with lower molecular weight,which could be used as supplementary fuel and chemical raw materials,but the selectivity of the product was poor and the value was low.Adding catalyst on the basis of pyrolysis technology could effectively improve product distribution and obtain high value-added products.Catalytic pyrolysis catalysts were mainly divided into acidic and alkaline categories.At present,the common catalytic pyrolysis catalysts for polystyrene were solid base catalysts.The reaction followed the carbanion mechanism,which could effectively reduce the yield of ethylbenzene and increase the yield of styrene and diphenyl alkane.
关键词
废旧塑料/聚苯乙烯/金属氧化负载催化剂/过渡金属氧化物/催化裂解
Key words
waste plastic/polystyrene/metal oxidation supported catalyst/transition metal oxide/catalytic cracking
维普
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