To investigate suitable model for supercritical fluid extraction of carrot seed oil, different mathematical models are selected from literature and solved using COMSOL Multiphysics software. Operating parameters such as pressure, temperature, solvent flow rate, and addition of co-solvent are varied in ranges as 200–400 bar, 50–70 °C, 5–15 g/min, and 0–10 wt\%, respectively. Solvent and solid phase mass transfer coefficients, easily accessible oil content and equilibrium constant are considered as tuning parameters to fit the model with experimental data. Oil yield is increased with pressure (400 bar) and temperature (70 °C) whereas, its value is highest at the solvent flow rate of 10 g/min, and co-solvent of 5 wt\%. Thus, these values of parameters are considered as optimum points. © 2019 Elsevier Ltd

Priyanka K

Chemical Engineering

(SoE) School of Engineering

Khanam S.

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Shiv Nadar University

In this study, the extraction of carrot seed oil is carried out using supercritical CO2. Screening design was applied on operating parameters such as pressure, temperature, solvent flow rate, particle size and co-solvent to study the contribution of each parameter on extraction yield. Central composite design is employed on reduced parameters with operating ranges: 20–40 MPa (pressure), 50–70 °C (temperature), 5–15 g/min (solvent flow rate) and 0–10 wt\% (co-solvent). Extraction yield is varied from 2.8 to 12.9 wt\% of carrot seed. Experimental data are fitted well in the least-square regression model where optimized conditions are found as 40 MPa, 70 °C, 8.53 g/min and 5.87 wt\% corresponding to the maximum yield of 13.5 wt\%. Analysis of oil reveals the presence of saturated and unsaturated fatty acids. Principle fatty acid of carrot seed oil, i.e., oleic acid, is also optimized to maximize its extraction. The industrial-scale economic assessment is performed to study the feasibility of the supercritical fluid extraction of carrot seed oil. © 2019, Islamic Azad University (IAU).

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