Case Studies in Chemical and Environmental Engineering (Dec 2024)
Experimental study of the use of plastic pyrolysis oil as an additive to improve physicochemical properties and performance rubber seed biodiesel
Abstract
The purpose of this study was to determine the effect of using Pyrolysis Plastic Oil (PPO) as an additive to improve the physicochemical properties and performance of Rubber Seed Biodiesel (BKB) in diesel engines. In this research, RSB was produced in a double jacket reactor using a KOH catalyst according to ASTM standards. The physical and chemical properties of RSB were also examined based on ASTM standard methods. Plastic waste consisting of used oil bottles (HDPE and PET), gallon water refill caps (LDPE and HDPE), buckets and basins (PP, HDPE, LDPE, PP and ABS), jerry cans (HDPE) are taken randomly from the recycling bin. recycle plastic waste. Plastic waste is pyrolyzed in a pyrolysis reactor at a temperature of 300 °C. The plastic pyrolysis oil is distilled first to separate the diesel and gasoline fractions. The PPO diesel fraction was checked for its physical and chemical properties according to ASTM standards and then used as an additional material for RSB. RSB and PPO were mixed with volume % ratios: 90:10, 80:20, 70:30 and 60:40. To determine the effect of adding PPO on RSB, each mixture was examined for its physicochemical properties. It was found that PPO can improve the physico-chemical properties of RSB, including increasing the heating value, increasing the cetane number with an addition of 10 %, reducing kinematic viscosity, density and acid value. On the other hand, PPO also reduces oxidation stability. A mixture of 60 % RSB +40 % PPO was then used as a diesel mixture during performance testing on diesel engines, because the heating value increased, the cetane number decreased but was still within ASTM standards, the viscosity and acid values decreased to ASTM standards. The performance test results show that the brake power of B10 and B20 is almost the same as the brake power of pure diesel, as are BSFC and BTE, but the Brake Power and BTE of B30 and B40 are on average smaller than pure diesel. On the other hand, the BSFC of B30 and B40 is higher than the BSFC of pure diesel. The HC emissions of all mixtures are lower than the HC emissions of pure diesel, while the opacity of pure diesel emissions is between B10, B20 and B30, B40. Blended fuel CO emissions are sometimes lower and sometimes equal to diesel CO emissions. Average CO2 emissions from mixed fuels are lower than diesel.
