聚丙烯高温催化热解实验研究

Experimental Study on High-Temperature Catalytic Pyrolysis of Polypropylene

为了研究不同热解温度和催化剂对聚丙烯(PP)热解产物的影响,分别对其气体产品和液体产品进行表征。结果表明:在700℃进行高温热解时所产生的CO_(2)含量最少,可燃气体含量最多。CaO(5 g)原位催化热解时,H/C的值提升较为明显,为1.77;并且,此时有较多的芳香族转化为脂肪族。C(5 g)和CaO(5 g)分开异位催化热解时得到的烷烃和烯烃的总量最多,其液体产品更适合作为燃料。此外,PP在700℃热解时可以产生更多的可燃气体,有利于二次利用。C和CaO作为催化剂催化热解PP时能够使其产生更多的高质量热解液体产品。

In order investigate the effects of different pyrolysis temperatures and catalysts on the pyrolysis products of polypropylene(PP),the gas and liquid products were characterized respectively.The results showed that the least amount of CO_(2) and the highest content of combustible gases were produced at the high temperature pyrolysis of 700°C.The H/C ratio was significantly improved to 1.77 with the in-situ catalytic pyrolysis of CaO(5 g),and more aromatic compounds were converted into aliphatic ones at this time.When C(5 g)and CaO(5 g)were used separately for ex-situ catalytic pyrolysis,the total amount of alkanes and alkenes obtained was the highest,making the liquid products more suitable as fuels.Moreover,PP pyrolysis at 700°C can produce more combustible gases,which is beneficial for secondary utilization.When C and CaO are used as catalysts in the catalytic pyrolysis of PP,more high-quality pyrolysis liquid products can be produced.