Production and Analysis of the Physicochemical Properties of the Pyrolytic Oil Obtained from Pyrolysis of Different Thermoplastics and Plastic Mixtures

Abstract

The constant search for the proper management of non-degradable waste in conjunction with the circular economy makes the thermal pyrolysis of plastics an important technique for obtaining products with industrial interest. The present study aims to produce pyrolytic oil from thermoplastics and their different mixtures in order to determine the best performance between these and different mixtures, as well as to characterize the liquid fraction obtained to analyze its use based on said properties. This was carried out in a batch type reactor at a temperature of 400 °C for both individual plastics and their mixtures, from which the yields of the different fractions are obtained. The liquid fraction of interest is characterized by gas chromatography and its properties are characterized by ASTM standards. The product of the pyrolysis of mixtures of 75% polystyrene and 25% polypropylene presents a yield of 82%, being the highest, with a viscosity of 1.12 cSt and a calorific power of 42.5 MJ/kg, which has a composition of compounds of carbon chains ranging between C6 and C20, for which it is proposed as a good additive agent to conventional fuels for industrial use.

Feasibility Study of Plastic Waste Pyrolysis from Municipal Solid Waste Landfill with Spent FCC Catalyst

“…Furthermore, PS plastic waste produced the least amount of gas and carbon residue. This is consistent with previous research showing that pyrolysis of PS produced the most liquid product with the least amount of gas and char when compared to PE and PP (Miandad et al, 2017b;Palmay et al, 2022). However, when compared to individual plastics, mixed plastic waste pyrolysis produced the lowest yield of liquid product and the highest yield of carbon residue and gas products.…”

“…However, when compared to individual plastics, mixed plastic waste pyrolysis produced the lowest yield of liquid product and the highest yield of carbon residue and gas products. The proportion of plastic types in the mixed feedstock has a significant impact on the oil yield of mixed plastic waste (Kusenberg et al, 2022;Palmay et al, 2022;Zein et al, 2022). Figure 8 exhibits the variation in the composition of pyrolysis oil derived from each feedstock type.…”

Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere

“…Moreover, this process has the potential to reduce the carbon footprint of plastic products by reducing carbon dioxide and carbon monoxide emissions [ 6 ]. Previous works investigating thermal [ 7 , 8 ] and catalytic [ 9 ] pyrolysis have shown its potential, as well as the optimal operating conditions for the recovery of cleaner energy from plastic waste [ 6 , 10 ] or specific mixtures [ 7 ]. However, there is currently great interest, especially in catalytic pyrolysis, due to its great advantages, which include the following: (i) it accelerates the reaction rate of the process, allowing a greater depolymerization of the raw material; (ii) it reduces the energy necessary for the degradation of plastic waste; and (iii) it provides greater selectivity to obtain higher-quality pyrolytic products [ 11 ].…”

Comparison of the Characteristics of Recycled Carbon Fibers/Polymer Composites by Different Recycling Techniques

“…This disposal type makes it difficult to recycle CFs; additionally, this process is costly and causes environmental pollution. Thus, the demand for waste recycling has been increasing [ 7 , 8 , 9 ].…”