Essential Characteristics of Plastics Waste for Pyrolysis Process: Comparison of Selected Packaging Plastics and PVC

Abstract

The poor degradability of plastics has led to huge plastics deposit in a landfill of which pyrolysis technology has been proposed to solve plastics waste problem. This paper reports the study on characteristics of two kinds of plastic wastes: selected packaging plastics and PVC. Characterizations have been performed for investigating water content, ash content, and decomposition temperature. The results revealed that the water content of packaging plastic waste was 0.69 ± 0.11%, while PVC was 1.22 ± 0.24%. The ash contents are 2.36 ± 1.03 % and 27.24±1.73 % for packaging plastics waste and PVC waste respectively. Plastic waste from packaging application and PVC waste decomposed at a temperature of 300-500°C and 200-800°C respectively. Decomposition of PVC waste took place in three stages: 200-370°C, 370-525°C and 600-800°C. It is recommended that the pyrolysis process should be conducted in the range of 300-500°C for packaging plastic waste and 200-800°C for PVC waste.

Characteristics Study of Liquid Fuel From Pyrolysis of Polyethylene Plastic Waste

“…The higher the operating temperature, the faster the pyrolysis process takes place. Long chain hydrocarbons from plastic waste will quickly degrade into shorter carbon chains to become the desired PLF [4]. As operation time goes by, the pyrolysis temperature increases due to heating and induces the greater PLF volume and product yield for both types of HDPE or HDPE.…”

“…Polyethylene (PE) plastic type of low and high-density polyethylene (LDPE and HDPE) is the major component of municipal plastic waste (MPW) from household waste in this city [2]. Polyethylene plastic is the most abundant type of plastic with a composition of more than 90% of MPW [3,4]. Plastic bag and commercial products packaging plastic are an example of LDPE type plastic.…”

Study on pyrolysis behavior and kinetics of waste plastics with spent FCC catalyst

“…Three samples comprising HDPE, LDPE, PP, PS, PET, and PVC were configured according to the proportions of these plastics in domestic packaging waste (20%, 20%, 35%, 18%, 4%, and 3%, respectively). 30,31 The first group was not mixed with the spent FCC catalyst, the second group was mixed with the spent FCC catalyst, and the third group was mixed with the pretreated spent FCC catalyst (Table 3).…”