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Plant oil derivates as fuels

100%
Farkas F.
Polish Journal of Chemical Technology
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2009
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vol. 11
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issue 1
4-7
EN
The dependence of the Hungarian economy on energy imports has already reached that degree, which is forecast in the EU for the average of the community by 2020.The total quantity of the biomass in Hungary is 350 - 360 mtons, out of which 105 - 110 mtons reproduces itself annualy. The energy content of the yearly produced biomass is as high as 1185 PJ, which is 5% more than the annual energy consumption. The renewable energies which are produced by agriculture could cover 10% of the energy demand of Hungary for a short term.At our College Faculty in Mezőtúr we have been dealing with the application issues of vegetable oil derivates as fuels since 1990.
2
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Thermodynamic analysis of biofuels as fuels for high temperature fuel cells

100%
Milewski J., Bujalski W., Lewandowski J.
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3
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Evaluation of the heat release rate during the combustion process in the diesel engine chamber powered with fuel from renewable energy sources

86%
Bednarski M., Orliński P., Wojs M., Gis M., Bednarski M., Orliński P., Wojs M., Gis M.
Bulletin of the Polish Academy of Sciences: Technical Sciences
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2020
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issue 6
4
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Cryo-injury in algae and the implications this has to the conservation of micro-algae

86%
Day J. G., Fleck R. A.
Microalgae Biotechnology
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2015
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vol. 1
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issue 1
EN
As with all products and processes exploiting biological materials algal biotechnology has an absolute requirement for stable, function-fulfilling master stockcultures. Conventionally microalgae and cyanobacteria are maintained by serial transfer with inocula (2.5-25% v/v) being transferred to fresh medium and the culture being held under controlled environmental conditions. This method is satisfactory for many algal taxa, but by its nature cannot provide an absolute guarantee of phenotypic or genotypic stability. Cryopreservation at ultra-low temperatures (> -130oC) is the only methodology that can provide this level of security to master stock-cultures; however, many algae are recalcitrant to cryopreservation with low or no survival. This review explores the reasons of this cryo-recalcitrance on the application of conventional colligative, two-step cryopreservation protocols and points towards the options available to enhance postcryopreservation viability.
5
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EFFECT OF BIOFUELS ON ENVIRONMENT AND SUSTAINABLE DEVELOPMENT

86%
Cao Y., Pawłowski L.
Ecological Chemistry and Engineering S
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2013
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vol. 20
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issue 4
799-804
EN
Nowadays world faces crisis caused by growing energy demand. Threat of climate change caused by the increased emission of CO2 from burning of fossil fuels exerts pressure on wider use of renewable energy resources. It is believed that one of important resources of renewable energy are biofuels. In the paper we present that in the most cases it is not true. Wide use of biofuel, especially in European Union, poses threat to sustainable development of today’s world. It is going to be presented that the production of biofuels from agricultural crops is, in many cases, unsustainable due to the fact that it reduces the access to food by devoting cultivatable land to crops designated for the production of biofuels. What is more, it has also negative influence on the environment, namely it reduces biodiversity, pollute water and, what is curious, not in all cases the use of biofuels leads to the reduction of CO2 emission.
PL
Jednym z ważnych zagrożeń we współczesnym świecie jest rosnące zużycie surowców energetycznych. Obawy dotyczące zmian klimatu, jak się wydaje powodowanego przez wzrost emisji CO2 pochodzącego ze spalania paliw kopalnianych, powodują wzrost zainteresowania szerszym zastosowaniem odnawialnych źródeł energii. Panuje przekonanie, że jednym z ważnych źródeł energii odnawialnych są ciekłe biopaliwa. W artykule staramy się udowodnić, że to przekonanie jest błędne. Szerokie stosowanie biopaliw prowadzi do zagrożenia zrównoważonego rozwoju współczesnego świata. Wykazujemy, że produkcję biopaliw z roślin uprawowych jest w wielu przypadkach niezgodna ze zrównoważonym rozwojem, ponieważ redukuje dostęp do żywności poprzez przeznaczanie pól uprawnych na uprawę roślin wykorzystywanych do produkcji biopaliw. Ponadto, ma to negatywny wpływ na środowisko, gdyż prowadzi do redukcji bioróżnorodności, zanieczyszczenia wody, a także nierzadko nie powoduje redukcji emisji CO2.
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