Toward maximizing the recycling rate in a Sapporo waste plastics liquefaction plant

Abstract

Sapporo Plastics Recycling Co., Ltd., (SPR) started its commercial operation of waste plastics liquefaction in 2000. At fi rst only hydrocarbon oil was reclaimed, this being derived from the waste plastics liquefaction process under the Japanese Containers and Packaging Recycling Law. Presently, thermal degradation residue and hydrochloric acid are being produced as by-products in addition to the hydrocarbon oil. As a result, the SPR plastics liquefaction plant has achieved a high reclamation rate of 96%, and 93% of the recycled products have been reused in Hokkaido, where SPR is located. The technical problems caused by corrosion and clogging have been solved.

Utilization of Plastics Waste Oil as Partial Substitute for Kerosene in Pressurized Cookstoves

“…Commercially operated plastics pyrolysis plants are successful to keep the required thermal energy low and less than the energy contained in their products. One of examples is a plant which started its operation in 2000 and capable of producing light, medium and heavy oils, along with by-products such as Hydrogen Chloride, pellets and flammable gas [1]. Substantial volume of combustible hydrocarbon oil will be obtained and ready for another purpose as simple fuels.…”

Energy from Waste Materials and Unconventional Sources

“…The presence of catalysts can help reducing the degradation temperatures, increasing cracking rate and shortening residence time, increasing pyrolysis yield, improving the quality of products, etc. (Aguado and Serrano 1999;Fukushima et al 2009). Variety of suitable catalysts can be selected according to the desired product quality (Walendziewski and Steininger 2001).…”

Study on dechlorination technology for municipal waste plastics containing polyvinyl chloride and polyethylene terephthalate

“…On December 24th, 2000, Ca(OH) 2 was added to the plastic feed pellets as a reagent to neutralize the benzoic acid and to react with HCl to form the stable chloride CaCl 2 . 18 Before Ca(OH) 2 was added, HCl gas from the thermal degradation of PVC in the dechlorination equipment reacted with aluminum and other metals contained in MWP and generated up to 1 wt% of metal chloride compounds in the thermal degradation residue. However, after Ca(OH) 2 was added, HCl gas reacted with Ca(OH) 2 generating CaCl 2 ; this was confi rmed on analysis of the pyrolysis residue.…”