废聚丙烯塑料等离子体热解研究——水蒸气的加入对改善气体品质的影响

以聚丙烯为试验物料，利用N2热等离子体在等离子体反应器内进行了一系列热解试验，重点考察了气体产物成分及含量。在反应过程中加入过热水蒸气以改善气体品质，在本实验条件下，气体产物中CO与H2之和可以达到40%，C2H2可达到5%。

PYROLYSIS OF WASTE POLYPROPYLENE IN A NITROGEN PLASMA REACTOR--EFFECT OF STEAM INJECTION ON IMPROVING GAS QUALITY

Plasma pyrolysis of polypropylene has been tested for the propose of converting waste plastic into gaseous fuel and useful chemicals.The plasma reactor has a D.C. arc nitrogen plasma generator with maximum input electric power of 55 kW and a reaction chamber of 50 mm inner diameter and 1 000 mm height. The results of a series of experiments show that under our optimum experimental conditions of power input 35.2 kW, feed rate 60 g/min, the concentration of H2 and C2H2 at the exit of the chamber can be as high as 18% and 5% respectively. The steam injection is introduced for improving the gaseous product quality. With water steam injection, the sum of H2, CO in the gas products can reach to 40% while the decrease of C2H2 concentration is slight. Meanwhile 96% of solid conversion and gas productivity of 2 160 mL/g are achieved. The results indicate that plasma assisted thermal decomposition of polypropylene may be a useful way for recovering energy and useful chemicals from waste plastic.