Veera Gnaneswar Gude

Published: Jun 29, 2017 by Bioresource technology
Authors: Patil, P. D., Gude, V. G., Mannarswamy, A., Deng, S., Cooke, P., Munson-McGee, S., ... & Nirmalakhandan, N.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

This study demonstrated a one-step process for direct liquefaction and conversion of wet algal biomass containing about 90% of water to biodiesel under supercritical methanol conditions. This one-step process enables simultaneous extraction and transesterification of wet algal biomass. A response surface methodology (RSM) was used to analyze the influence of the three process variables.

Published: Jun 29, 2017 by Bioresource Technology
Authors: Patil, P. D., Gude, V. G., Mannarswamy, A., Cooke, P., Munson-McGee, S., Nirmalakhandan, N., ... & Deng, S.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

The effect of microwave irradiation on the simultaneous extraction and transesterification (in situ transesterifcation) of dry algal biomass to biodiesel was investigated. the optimal conditions for this process were determined as: dry algae to methanol (wt/vol) ratio of around 1:12, catalyst concentration about 2 wt.%, and reaction time of 4 min.

Published: Jun 29, 2017 by Industrial & Engineering Chemistry Research
Authors: Patil, P. D., Gude, V. G., & Deng, S.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

Process parameter evaluation and catalyst performance study was conducted for biodiesel production using jatropha curcas, waste cooking, and camelina sativa oils. Conversion of triglycerides to methyl esters involves esterification and/or transesterification, depending on the nature of the feedstock.

Published: Jun 29, 2017 by Fuel
Authors: Patil, P. D., Gude, V. G., Mannarswamy, A., Cooke, P., Nirmalakhandan, N., Lammers, P., & Deng, S.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

In this comparative study, direct conversion of algal biomass into biodiesel using supercritical methanol (SCM) and microwave-assisted (MW) transesterification methods was investigated. Wet algal biomass was used as feedstock in the supercritical methanol process and dry algal biomass for the microwave-assisted transesterification.

Published: Jun 29, 2017 by Sustainable Chemical Processes
Authors: Gude, V. G., Patil, P., Martinez-Guerra, E., Deng, S., & Nirmalakhandan, N.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

Microwave energy based chemical synthesis has several merits and is important from both scientific and engineering standpoints. Microwaves have been applied in numerous inorganic and organic chemical syntheses; perhaps, from the time their ability to work as heat source was discovered. Recent laboratory scale microwave applications in biodiesel production proved the potential of the technology to achieve superior results over conventional techniques.

Published: Jun 29, 2017 by Energy & Fuels
Authors: Patil, P. D., Gude, V. G., Camacho, L. M., & Deng, S.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

Catalytic conversion of Camelina Sativa oil to biodiesel through both conventional heating and microwave radiation was investigated. Three different types of catalysts: homogeneous catalysts (NaOH and KOH), heterogeneous metal oxide catalysts (BaO and SrO), and sol−gel derived catalysts (BaCl2/AA and SrCl2/AA) were evaluated for their efficacy in biodiesel production.

Published: Jun 29, 2017 by Chemical engineering journal
Authors: Patil, P., Gude, V. G., Pinappu, S., & Deng, S.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

The reaction kinetics of transesterification of Camelina sativa oil using metal oxide catalysts under the conventional heating and the microwave-heating conditions were investigated. The transesterification reaction rates and the fatty acid methyl ester (FAME) conversion rates were determined using heterogeneous metal oxide catalysts, i.e., BaO, CaO, MgO and SrO and two different heating methods.

Published: Jun 29, 2017 by Applied energy
Authors: Gude, V. G., & Grant, G. E.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

This study investigates the effect of direct sonication in conversion of waste cooking oil into biodiesel. Waste cooking oils may cause environmental hazards if not disposed properly. However, waste cooking oils can serve as low-cost feedstock for biodiesel production. Ultrasonics, a non-conventional process technique, was applied to directly convert waste cooking oil into biodiesel in a single step.

Published: Jun 29, 2017 by Journal of environmental chemical engineering
Authors: Blair, M. F., Kokabian, B., & Gude, V. G.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

Algae can serve as feedstock for many high value bioproducts and biofuels production. The key to economic algal biomass production is to optimize the growth conditions. This study presents the effect of light wavelengths and growth medium composition on the growth of Chlorella vulgaris. Different light wavelengths [blue, clear (white), green, and red] were used to test their effect on algal growth.

Published: Jun 29, 2017 by Energy & Fuels
Authors: Patil, P. D., Gude, V. G., & Deng, S.
Subjects: Chemistry, Energy & Clean Technology, Engineering - Chemical, Engineering - Environmental, Environmental Science

Transesterification of camelina oil using supercritical methanol with hexane as a cosolvent and subcritical methanol along with potassium hydroxide as a cosolvent/catalyst was investigated to study the methyl ester conversion process. It was found that cosolvents play a vital role in reducing the severity of critical operational parameters and maximize the biodiesel yield.