Performance and emission analysis of co-pyrolytic oil obtained from sugarcane bagasse and polystyrene in a CI engine

The present study aims on analyzing the characterizations and optimizing the performance and emission parameters of the co-pyrolytic oil in different blends using a diesel engine. The study was conducted for diesel and three different blends of co-pyrolytic oil (COPO) with diesel in proportions of 5% (COPO5), 10% (COPO10), and 15% (COPO15) respectively. The co-pyrolytic oil was furnished using sugarcane bagasse and polystyrene in the ratio of 1:3 in a semi-batch reactor. From the characterization for fuel properties, it was observed that all the properties of three different blends found to be decreasing compared to diesel, except calorific value which was slightly increasing with an increase in blending ratio of co-pyrolytic oil. The FTIR analysis revealed the presence of aromatic compounds, phenols, alkanes and alkenes with major part of aromatic compounds. The GC-MS analysis of the co-pyrolytic oil resulted in highest proportion of aromatic compounds followed by aliphatic hydrocarbons, some alkanes, alkenes and polycyclic aromatic hydrocarbons. The performance studies revealed the optimum values for bake power as 3.62 kW, brake thermal efficiency as 31.24%, brake specific fuel consumption as 0.2 kg/kWh and torque of 21.56 Nm for 5% blend (COPO5) under full load condition. The emission parameters for COPO5 also observed to be reduced with CO as 0.018% and CO2 as 3.4% compared to diesel value as 0.05% and 3.8% respectively.

Automated summary

This study analyzed the characteristics and performance parameters of co-pyrolytic oil blends in a diesel engine, finding that the properties of the blends were generally lower than diesel, except for calorific value which slightly increased with higher co-pyrolytic oil blending ratios. FTIR and GC-MS analysis revealed the presence of aromatic compounds and other hydrocarbons in the co-pyrolytic oil.