Selective Dechlorination of Polyvinyl Chloride by Microwave Irradiation

Abstract

The present study investigates microwave irradiation to develop the recycling technology of any kind of plastic waste containing organic chlorine, dechlorination. Polyvinyl chloride (PVC) was used as a typical organic chlorine. Under constant sample temperature, the PVC dechlorination properties were compared between microwave irradiation and conventional heating. It was clari ed that microwave irradiation induced much faster dechlorination than conventional heating. It was also found that the dechlorination reaction by microwave irradiation progressed at a lower temperature than that by convention heating. Moreover, the e ciency of dechlorination, de ned as the ratio of dechlorination to total weight loss, using microwave irradiation was higher than that by conventional heating. This result shows the possibility of selective dechlorination by using microwave irradiation.

Assessing the feasibility of chemical recycling via steam cracking of untreated plastic waste pyrolysis oils: Feedstock impurities, product yields and coke formation

“…Dehalogenation of the waste fractions can be performed prior to the pyrolysis. Techniques include thermal dehalogenation which can be performed as a stand-alone process (Bockhorn et al, 1999, Yoshioka et al, 2000, Ma et al, 2004, Sakata et al, 1998, or in combination with extrusive feeding (Saito and Narita, 2001, Fukushima et al, 2010, Okuwaki et al, 2006, Kobayashi et al, 2019.…”

Towards high-quality petrochemical feedstocks from mixed plastic packaging waste via advanced recycling: The past, present and future

“…Next to thermal pre-treatment methods, selective dechlorination of PVC by microwave irradiation was studied by a number of authors [59][60][61][62]. While polyolefins have very low dielectric constants and are therefore essentially transparent to microwaves, the C-Cl bond in PVC is highly polar and responsive to microwave irradiation [59,63]. It was reported that microwave irradiation reduced the dechlorination temperature of PVC to 200-210…”