Occurrence mode and concentration of chlorine in liquid product from co-pyrolysis of waste plastic and coal

The occurrence mode and concentration of chlorine in liquid product including tar and water from co-pyrolysis of waste plastic (WP) and coal were studied. The effect of temperature, holding time, heating rate and gas flow on chlorine concentration in liquid product was examined. The result indicates that the addition of WP to coal in co-pyrolysis does not increase the organic chlorine compound in the liquid product. However, the tar yield increases, and the water yield decreases. The chlorine in water mainly exists as inorganic form (NH₄Cl) and organic amine hydrochloride. There is no obvious C—Cl band in IR spectra of tar is observed. This indicates that the organic chlorine in tar is very little.