Title: Production Of Wax From Polypropylene And High-Density Polyethylene Via Thermal And Catalytic Pyrolysis
Authors: Yousif.A A, Mohamad H. H. Deifalla
Volume: 9
Issue: 10
Pages: 93-98
Publication Date: 2025/10/28
Abstract:
Plastic waste, particularly polyolefin such as polypropylene (PP) and high-density polyethylene (HDPE), represents a major environmental burden. Pyrolysis provides an eco-friendly approach to convert these polymers into useful hydrocarbon products such as wax. This study investigates the production of wax from PP and HDPE through thermal and catalytic pyrolysis using natural bentonite. Experiments were conducted at 450-500 °C in a semi-batch reactor under nitrogen. The results revealed that thermal pyrolysis of HDPE-rich mixtures yielded up to 70 wt% wax, while catalytic pyrolysis enhanced conversion efficiency and reduced reaction time. GC-MS analysis showed that the waxes consist mainly of long-chain aliphatic hydrocarbons (C?-C??), suitable for lubricants, candles, and coatings. The study demonstrates that bentonite is a promising, low-cost catalyst for converting polyolefin waste into high-value wax products.