Energetic and economic evaluation of waste glycerol cogeneration in Brazil

Albarelli, Juliana Q.; Santos, Diego T.; Holanda, Marcelo R.

doi:10.1590/s0104-66322011000400014

Cited by 33 publications

(30 citation statements)

References 9 publications

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“…Albarelli et al [14] studied the theoretical performance of a cogeneration facility utilizing the heat of combustion of crude glycerol in a steam plant using water Rankine cycle. The authors assumed a combustion efficiency of 85%, a turbine efficiency of 85% and a mass flow of glycerol (LHV ¼ 14300 kJ kg À1 ) equal to 0.36 kg s À1 .…”

Section: Model Resultsmentioning

confidence: 99%

“…1, increases the temperature and the enthalpy of fresh air introduced into the combustion chamber and reduces the mass of glycerol required to furnish the same heat to the engine hot source. In addition, in the case of glycerol, this improvement could ensures a high temperature combustion process that reduces the risk of formation of acrolein [14,15]. The temperature of air at the preheater outlet T air,out is calculated according to the regenerator efficiency whose expression is: ε preh: ¼ T air;out À T air;in T HS À T air;in (23)…”

Section: Equations Usedmentioning

confidence: 99%

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Performances of a CHP Stirling system fuelled with glycerol

2016

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a b s t r a c tThe simultaneous productions of mechanical work and low-grade heat by a Stirling engine cogeneration powered by crude glycerol are studied analytically. The study focuses on searching the appropriate values of engine physical parameters to minimize the specific fuel consumption to optimize the work production regardless of the low-grade heat production. The modeling considers the equation of combustion, finite heat transfer between the sources and the working gas, non-perfect regenerator, nonisothermal transformations and non-sinusoidal volume variations during the crankshaft rotation. The optimum operating temperature of the engine hot source and the optimum piston-displacer angular phase shift are determined for alpha, beta and gamma Stirling engines according to the engines swept volume ratio. Results show that the optimum configuration changes considerably with the value of the coefficient of heat transfer. The minimum specific glycerol consumption is 1024 g gly ./kWh and is obtained with alpha type engine. Best performance for beta type is quasi-similar but in this last case, the indicated work production is higher than for alpha engine.

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Section: Model Resultsmentioning

confidence: 99%

Section: Equations Usedmentioning

confidence: 99%

Performances of a CHP Stirling system fuelled with glycerol

2016

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“…The search of cheap and easily accessible raw material or substrate for biosurfactants production has been going on for years. The utilization of by-products, even if from a different process could be another smart solution-for example: glycerol, which is a by-product of biodiesel production, is available in surplus amount in the global market (Albarelli et al, 2011) which might be a cheap alternative for biosurfactant production. Rhamnolipids are well-characterized and scientifically proven biosurfactants which are slowly and steadily becoming highly sought after biomolecules.…”

Section: Biosurfactant's Economic Feasibility-what It Takes To Becomementioning

confidence: 99%

Microbiotechnology Based Surfactants and Their Applications

Rahman¹

2016

Frontiers Research Topics

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PublisherFrontiers in Microbiology About FrontiersFrontiers is more than just an open-access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers Journal SeriesThe Frontiers Journal Series is a multi-tier and interdisciplinary set of open-access, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers Journal Series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to QualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: researchtopics@frontiersin.org 2 February 2016 | Microbiotechnology Based Surfactants and Their Applications Frontiers in MicrobiologyBiosurfactants are structurally diverse group of bioactive molecules produced by a variety of microorganisms. They are secondary metabolites that accumulate at interfaces, reduce surface tension and form micellar aggregates. This research topic describes few novel microbial strains with a focus on increasing our understanding of genetics, physiology, regulation of biosurfactant production and their commercial potentials. A major stumbling block in the commercialization of b...

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“…The glycerin produced contains a significant percentage of water and methanol that influence the LHV. This value may range between 14 and 20.4 MJ/kg [6,21] and consequently, the allocation factor may range from 94 to 96 % for biodiesel. An average allocation factor was used to allocate impacts: 95 % for biodiesel and 5 % for glycerine.…”

Section: Life-cycle Modelmentioning

confidence: 99%

Biodiesel from Waste Cooking Oils in Portugal: Alternative Collection Systems

Caldeira

Queirós

Freire

2015

Waste Biomass Valor

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Waste Cooking Oils (WCO) have been gaining prominence as an alternative feedstock for biodiesel production due to is potential to reduce the economic and environmental costs of biodiesel produced with biomass. However, there are various types of WCO collection with different collection efficiency and environmental impacts. The aim of this paper is to present an environmental assessment of biodiesel from WCO addressing different collection schemes in Portugal. The implications of alternative allocation approaches (no allocation, mass allocation, energy allocation and economic allocation) in the final results are also assessed. Life Cycle Impact Assessment was calculated (ReCiPe method) for: Climate Change; Terrestrial Acidification; Marine Eutrophication and Freshwater Eutrophication. WCO collection contribution for the overall impacts ranged significantly for the various collection system and impact categories. The application of different allocation approaches led to differences in the results up to 11 %. A comparison between the GHG emissions calculated for biodiesel from WCO and the typical and default values presented in the Renewable Energy Directive was performed. The GHG emission saving for biodiesel from WCO collected in Portugal ranged from 81 to 89 %.

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Energetic and economic evaluation of waste glycerol cogeneration in Brazil

Cited by 33 publications

References 9 publications

Performances of a CHP Stirling system fuelled with glycerol

Performances of a CHP Stirling system fuelled with glycerol

Microbiotechnology Based Surfactants and Their Applications

Biodiesel from Waste Cooking Oils in Portugal: Alternative Collection Systems

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