Journal
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
Volume -, Issue -, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15567036.2021.1950872
Keywords
Third-generation biofuel; microalgae; biomass; engine; alcohol; renewable energy
Funding
- Department of Science and Technology, Ministry of Science and Technology [CRD/2018/000061]
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This study aimed to synthesize amyl alcohol from sustainably cultivated microalgae biomass using reactor combinations and Ehrlich biosynthetic pathway. Experiments on a compression ignition engine showed significant fuel consumption reduction for the amyl alcohol-diesel mixture at medium-high load conditions.
This study is aimed at synthesizing amyl alcohol from Scenedesmus quadricauda third-generation microalgae biomass which is cultivated sustainably using reactor combinations and Ehrlich biosynthetic pathway. Systematic experimentation was carried out on a compression ignition engine at maximum throttle pedal position condition to assess the potential of amyl alcohol-diesel mixture combinations and to assess its environmental impact at different loads. Optimum mixture proportion of amyl alcohol-diesel blends were identified statistically using multivariate principal component and desirability analysis based on the experimental data acquired from the engine testbed. From the study, it was inferred that a dry biomass yield rate of 4.2 g/L was achieved when the light intensity was maintained at similar to 51-56 mu mol/m(2)/s in the in-situ raceway pond while cultivating Scenedesmus quadricauda. Experimentation showed that the fuel consumption reduced by 72.4% for AA20D80 at low-high load conditions. Improved combustion characteristics are achieved at higher concentrations of amyl alcohol operating at medium-high loads. The lowest smoke and NOX emission of 52.85 mg/m(3) and 104 ppm was observed for AA40D60 at no-load condition. Statistical analysis revealed that the optimal amyl alcohol-diesel mixture combinations to be AA20D80 with combined desirability of 0.497.
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