Microwave‐Enhanced Methods for Biodiesel Production and Other Environmental Applications

Gude, Veera Gnaneswar; Patil, Prafulla D.; Deng, Shuguang; Khandan, Nirmala

doi:10.1002/9781118287705.ch8

Cited by 8 publications

(11 citation statements)

References 92 publications

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“…The benefits of process intensification techniques such as ultrasound and microwaves have been very well realized in the recent years, especially in the biodiesel chemical synthesis [6,52,53]. However, currently these technologies are cost-intensive due to high capital costs.…”

Section: Effect Of Ultrasonic Intensitymentioning

confidence: 99%

“…However, currently these technologies are cost-intensive due to high capital costs. It is imperative that future research efforts should focus on the reactor design, ultrasound probe modification, and the biodiesel process reaction chemistry using novel solvent combinations to improve the energy efficiency as well as the product costs [6,[52][53][54].…”

Section: Effect Of Ultrasonic Intensitymentioning

confidence: 99%

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Continuous and pulse sonication effects on transesterification of used vegetable oil

Martinez‐Guerra

Gude

2015

Energy Conversion and Management

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Section: Effect Of Ultrasonic Intensitymentioning

confidence: 99%

Section: Effect Of Ultrasonic Intensitymentioning

confidence: 99%

Continuous and pulse sonication effects on transesterification of used vegetable oil

Martinez‐Guerra

Gude

2015

Energy Conversion and Management

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“…Microwave processing has been shown to be effective at both pilot scale [13] and at industrial scale for the production of plant material extracts of outstanding stability and purity [14]. Efficiency of microwave treatment for pyrolysis of biomass has been proved in a number of publications [15][16][17]. Furthermore, several researchers looked at comparing MW pyrolysis with conventional pyrolysis and identified considerable differences between the two methods [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Microwave and slow pyrolysis biochar—Comparison of physical and functional properties

Mašek

Budarin

Gronnow

et al. 2013

Journal of Analytical and Applied Pyrolysis

220

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This paper reports work that compares slow pyrolysis and MW pyrolysis of two different feedstock (willow chips and straw), with particular focus on physical properties of resulting chars and their relation to biochar soil function. In these experiments, slow pyrolysis laboratory units at the University of Edinburgh and the MW pyrolysis units at the University of York were used to produce biochar from identical feedstock under a range of temperatures. Physical properties and stability of thus produced biochar from both systems were then analysed and compared. The results showed that using MW, pyrolysis can occur even at temperatures of around 200 °C, while in case of conventional heating a higher temperature and residence time was required to obtain similar results. This paper presents new data not only on the comparison of biochar from microwave and slow pyrolysis in terms of physical properties, but also in respect to their carbon sequestration potential, i.e. stability.

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“…Various types of biofuel feedstock were utilized for biofuel production which include vegetable plants, oil seed crops (edible such as peanut, soybean, and corn), seeds known as first generation feedstock; animal fats, non-edible oils (jatropha, Karanja and other tropical oil seeds), waste oils, lignocellulosic feedstock, grass, crop residues and waste biomass called second generation feedstock; and more recently algae, cyanobacteria and microbial (from wastewater sludge) oils called third generation feedstock [5]. Considering the escalating demands for the transportation and other fuels for various industrial uses, algae and other low cost feedstock seem to be the most promising and reliable feedstock since it has the potential to sustain the biofuel production at current consumption and meet the process economics by delivering valuable bioproducts.…”

Section: Introductionmentioning

confidence: 99%

Synergism of microwaves and ultrasound for advanced biorefineries

Gude¹

2015

REFFIT

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Conventional energy sources are limited and non-renewable and their consumption contributes to greenhouse gas emissions. The world is in need of advanced biorefineries to meet ever growing energy demands associated with population growth and economic development. An advanced biorefinery should use renewable and sustainable (both in quality and quantity) feedstock that gives rise to higher energy gains with minimumnon-renewable energy and resource consumption. Development of advanced biorefineries is currently encircled by two major issues. The first issue is to ensure adequate biofuel feedstock supplies while the second issue is to develop resource-efficient technologies for the feedstock conversion to maximize energy and economic and environmental benefits. While microalgae, microbial derived oils, and agricultural biomass and other energy crops show great potential for meeting current energy demands in a sustainable manner, process intensification and associated synergism can improve the resource utilization efficiency. Synergism of process intensification tools is important to increase energy efficiency, reduce chemical utilization and associated environmental impacts, and finally process economics. Among the many process intensification methods, this commentary provides a perspective on the essential role of MWs and US and their synergy in biofuel production. Individual, sequential, and simultaneous applications of MWs and US irradiations can be utilized for process intensification of various biofuels production and selective recovery of high value bioproducts. Process related barriers, namely mass and heat transfer limitations, can be eliminated by this synergism while improving the reaction efficiency and overall process economics significantly. In this article, a brief review focused on recent developments in MW and US mediated process intensification for biofuel synthesis and associated issues in their synergism followed by a discussion on current challenges and future prospective is presented.

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Microwave‐Enhanced Methods for Biodiesel Production and Other Environmental Applications

Cited by 8 publications

References 92 publications

Continuous and pulse sonication effects on transesterification of used vegetable oil

Continuous and pulse sonication effects on transesterification of used vegetable oil

Microwave and slow pyrolysis biochar—Comparison of physical and functional properties

Synergism of microwaves and ultrasound for advanced biorefineries

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