Catalytic decomposition of hydrocarbon into hydrogen and carbon in a spouted-bed reactor as the second-stage reactor of a plastic recycling process

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• 作者：Yoshimitsu Uemura ; Kouichi Baba ; Hiroyuki Ohe ; Yoshihiro Ohzuno and Yasuo Hatate
• 关键词：Plastic recycling ; Propene ; Catalytic decomposition ; Spouted bed ; Nickel ; Palladium
• 刊名：Journal of Material Cycles and Waste Management
• 出版年：2003
• 出版时间：August 2003
• 年：2003
• 卷：5
• 期：2
• 页码：94-97
• 全文大小：273 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Waste Management and Waste Technology
  Environmental Management
  Industrial Pollution Prevention
  
• 出版者：Springer Japan
• ISSN：1611-8227

文摘

A two-stage process for the chemical recycling of plastics is proposed. In this process, which consists of two reactors, plastics are converted into hydrogen and carbon. In the first reactor, plastic chips are thermally decomposed into hydrocarbons. In the second reactor, the hydrocarbons formed in the first reactor are catalytically decomposed into carbon and hydrogen. In this study, in order to obtain basic data for the second reactor, propene was catalytically decomposed in a laboratory-scale spouted-bed reactor (600mm high, 21.6mm internal diameter, made of SUS304). The effect of the type of spouting medium used on the decomposition behavior of propene was investigated using four types of spouting medium (nickel-plated -alumina, palladium-plated -alumina, nickel-impregnated -alumina, and -alumina). The nickel-impregnated -alumina gave the best propene conversion and hydrogen yield.