塑料与煤低温共焦化的液体产物性质分析

ANALYSIS OF TARS FROM LOW-TEMPERATURE CO-CARBONIZATION OF PLASTICS AND COAL

利用GC -MS考察了不同种类塑料 (PDPE ,PP ,PPVC)单独热解及与八一焦煤低温共焦化焦油的组成。结果表明 :添加HDPE、PP使煤焦油中脂肪烃的相对收率提高 ,焦油中脂肪烃的含量明显增加和轻质化 ,可作为加氢精制汽油的原料 ;而PPVC则使脂肪烃和芳香化合物的相对收率均增加 .塑料与煤共焦化过程中同时存在物理和化学协同作用 ,减少了二次反应的机会 ,增加了焦油收率 ,同时促进了焦油中芳香化合物的甲基化 .

The tars obtained from low-temperature carbonization of HDPE,PP,PPVC,and their mixtures with coal(with 5% plastics)were analyzed by GC-MS.The results show that the additions of HDPE and PP increase the yields of aliphatic hydrocarbons in tars.The remarkable increase of hydrocarbons and light compounds makes the tar be used as feedstocks for production of hydrogenated gasoline.The addition of PPVC enhances the yields of both aliphatic hydrocarbons and aromatic compounds.The physical and chemical synergism exists in the co-carbonization of plastics and coal and reduces the chance of secondary reaction,which increases tar yield and favours the formation of methyl-substituted aromatic compounds in tars.