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Issue 3, 2012
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Power dissipation in microwave-enhanced in situ transesterification of algal biomass to biodiesel

Prafulla D. Patil,a   Harvind Reddy,a   Tapaswy Muppaneni,a   Aravind Mannarswamy,a   Tanner Schuab,b   F. Omar Holguin,b   Peter Lammers,c   Nagamany Nirmalakhandan,d   Peter Cookee  and  Shuguang Deng*a  
Author affiliations

* Corresponding authors

a Chemical Engineering Department, New Mexico State University, Las Cruces, USA
E-mail: sdeng@nmsu.edu
Fax: +1-575-646-7706
Tel: +1-575-646-4346

b Chemical Analysis and Instrumentation Laboratory, New Mexico State University, Las Cruces, USA

c Energy Research Laboratory, New Mexico State University, Las Cruces, USA

d Civil and Environmental Engineering Department, New Mexico State University, Las Cruces, USA

e Electron Microscopy Laboratory, New Mexico State University, Las Cruces, USA

Abstract

We investigated the effect of power dissipation on microwave-accelerated simultaneous extraction and transesterification of dry algal biomass (Nannochloropsis salina) to biodiesel. The response surface methodology (RSM) was applied to design the experiments and optimize the process parameters, including dry algae to methanol ratio, reaction time and catalyst concentrations, by evaluating their influences on the fatty acid methyl ester yield (FAME) under controlled microwave power conditions. The microwave energy utilization efficiency was estimated at various power levels to optimize the power dissipation, maximize FAME yields and minimize energy losses. The algal biomass characterization and algal biodiesel analysis were performed using various analytical instruments such as FTIR, SEM-EDS, TGA and GC-MS. The Nile Red method was applied for lipid localization in microalgae cells using confocal microscopy and fluorescence spectroscopy. The direct conversion technique has the potential to provide energy-efficient and economical routes for biodiesel production from algal biomass.

Graphical abstract: Power dissipation in microwave-enhanced in situ transesterification of algal biomass to biodiesel

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Article information

https://doi.org/10.1039/C2GC16195H
Submitted
02 Sep 2011
Accepted
09 Jan 2012
First published
08 Feb 2012
Green Chem., 2012,14, 809-818
Article type
Paper
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Power dissipation in microwave-enhanced in situ transesterification of algal biomass to biodiesel

P. D. Patil, H. Reddy, T. Muppaneni, A. Mannarswamy, T. Schuab, F. O. Holguin, P. Lammers, N. Nirmalakhandan, P. Cooke and S. Deng, Green Chem., 2012, 14, 809
DOI: 10.1039/C2GC16195H

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