Analysis of Properties and Break-Even Point of Pyrolysis Oil of Plastic Waste from Landfill
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Abstract
This research studied pyrolysis fuel oil produced from a 10-year-old landfilled plastic waste from Nonthaburi Province. A vertical reactor (bench-scale fixed-bed reactor) with a capacity of 18.85 liters was utilized at temperature conditions of 400 °C and 450 °C, without using the catalyst. Five ratios of oil mixture comprising produced pyrolysis oil and commercial diesel fuel at 1:9, 2:8, 3:7, 4:6, and 5:5 were also studied to determine the most optimized mixture ratio and energy output. The physical properties of fuel oil were analyzed using Fourier Transform Infrared Spectroscopy (FT-IR). Calorific values were obtained by bomb calorimetry, and the production break-even point was calculated. Pyrolyzed products from the experimental conditions at 400 °C and 450 °C were pyrolysis oil 21.20 %, 32.10 %, char 42.10 %, 24.30%, and mixed gases 36.70 % and 43.60 %, respectively. Pyrolysis oil was primarily constructed of L-type aliphatic hydrocarbons, alkenes, and alkanes. Spectral analysis indicated similarities between some mixed oil formulas and commercial diesel fuel. The mixture ratio of 3:7, pyrolysis oil at 450 °C, and commercial diesel fuel gave the highest calorific value at 44.277 MJ/kg and the closest properties to commercial diesel as being compared to other formulas. The break-even point of this pyrolysis oil fuel production is estimated to be 1 years and 3 months at 104.698 THB per liter.
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