Tomoyuki Imai

Removal of organic chlorine compounds by catalytic dehydrochlorination for the refinement of municipal waste plastic-derived oil

Municipal waste plastic derived oil was prepared by thermal degradation of municipal waste plastics at 410°C. During the degradation of these waste plastics containing polyvinyl chloride, organic chlorine compounds were produced in the oil. The chloroorganic compounds were dehydrochlorinated by using various catalysts such as iron oxide, iron oxide–carbon composite, ZnO, MgO and Redmud. The catalysts were characterized by N2 adsorption and X-ray diffraction. The iron oxide catalysts were effective in removing the chloroorganic compounds. MgO and ZnO catalysts were deactivated during the reaction by HCl, which is produced by the dehydrochlorination of chloroorganic compounds. Iron oxide and its carbon composite were found to be stable in the dehydrochlorination of municipal waste plastic derived oil.

Catalytic dechlorination of chloroorganic compounds from PVC-containing mixed plastic-derived oil

Abstract The dechlorination of chloroorganic compounds from PVC-containing mixed plastic-derived oil was studied over iron oxide and iron oxide-carbon composite catalysts. The catalysts are characterised by nitrogen adsorption and X-ray diffraction. The catalysts are deactivated initially due to the adsorption of HCl gas that is produced during the reaction. Continuous adsorption of HCl on iron oxide leads to the conversion of iron oxide to iron chloride. The catalysts’ deactivation was overcome by removing the reversible adsorbed HCl gas continuously, using He as a carrier gas.