Pyrolysis of WEEE plastics using catalysts produced from fly ash of coal gasification

Pyrolysis of WEEE plastics using catalysts produced

from fly ash of coal gasification

Marika Benedetti;Lorenzo Cafiero;Doina De Angelis;Alessandro Dell'Era;Mauro Pasquali;Stefano Stendardo;Riccardo Tuffi;Stefano Vecchio Ciprioti

【期刊名称】《中国高等学校学术文摘·环境科学与工程》 【年(卷),期】2017(011)005

【摘要】Catalytic pyrolysis of thermoplastics extracted from waste electrical and electronic equipment (WEEE) was investigated using various fly ash-derived catalysts.The catalysts were prepared from fly ash by a simple method that basically includes a mechanical treatment followed by an acid or a basic activation.The synthesized catalysts were characterized using various analytical techniques.The results showed that not treated fly ash (FA) is characterized by good crystallinity,which in turn is lowered by mechanical and chemical treatment (fly ash after mechanical and acid activation,FAMA) and suppressed almost entirely down to let fly ash become completely amorphous (fly ash after mechanical and basic activation FAMB).Simultaneously,the surface area resulted increased.Subsequently,FA,FAMB and FAMA were used in the pyrolysis of a WEEE plastic sample at 400 ℃ and their.performance were compared with thermal pyrolysis at the same temperature.The catalysts principally omprove the light oil yield:from 59 wt.％ with thermal pyrolysis to 83 wt.％ using FAMB.The formation of styrene in the oil is