A simple model for super critical fluid extraction of bio oils from biomass

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作   者：

Rajesh N. Patel;  Santanu Bandyopadhyay;  Anuradda Ganesh; 

作者机构：

Mechanical Engineering Department;  Department of Energy Science & Engineering;  India;  Mumbai 400 076;  Ahmedabad 382 481;  Indian Institute of Technology;  Institute of Technology;  Bombay;  Nirma University of Science & Technology;  Powai; 

关键词：

supercritical fluid extraction;  carbon dioxide;  cashew nut shells;  black pepper;  mass transfer; 

期刊名称：

Energy conversion & management

i s s n：

0196-8904

年卷期：

2011 年 52 卷 1 期

页   码：

652-657

页   码：

摘   要：

A simple mathematical model to characterize the supercritical extraction process has been proposed in this paper. This model is primarily based on two mass transfer mechanisms: solubility and diffusion. The model assumes two districts mode of extraction: initial constant rate extraction that is controlled by solubility and falling rate extraction that is controlled by diffusivity. Effects of extraction parameters such as pressure and temperature on the extraction of oil have also been studied. The proposed model, when compared with existing models, shows better agreement with the experimental results. The proposed model developed has been applied for both high initial oil content material (cashew nut shells) and low initial oil content material (black pepper).