Tag Archives: BioButanol

877–895 S. Raita, K. Spalvins and D. Blumberga
Prospect on agro-industrial residues usage for biobutanol production
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Prospect on agro-industrial residues usage for biobutanol production

S. Raita*, K. Spalvins and D. Blumberga

Riga Technical University, Institute of Energy Systems and Environment, Azenes street 12/1, LV 1048 Riga, Latvia
*Correspondence: svetlana.raita@rtu.lv

Abstract:

Climate changes, environmental pollution and resource depletion are one of the numerous major problems humanity faces. United Nations sustainable development goals are aimed at solving these problems. The requirement for affordable, renewable, sustainable, biodegradable and environmentally friendly fossil fuel alternative sources is prompted by the development and advancement of biofuel production technologies. Of the various biofuel alternatives, biobutanol has increased the interests of researchers due to its desirable characteristics such as hydrophobicity, relatively high heating value and energy density, relatively low vapour pressure, etc. Nowadays, sustainable production of the biobutanol depends on the used feedstock source and its pre-treatment method, selected enhancing microorganism strain, acetone–butanol–ethanol fermentation effectiveness and titer of biobutanol. The main research challenges in biobutanol production are an improvement of production efficiency and increasing the financial viability of the technology. This review summarizes the latest results of lignocellulosic components content and fermentable sugars composition in different agro-industrial residues; biobutanol production depending on the Clostridium enhancing strategy, process optimization and selection of substrate. Such analysis provides a better perception of the capability of using agro-industrial residues for biobutanol production efficiency.

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1162–1169 B. Peterka,, M. Pexa, J. Čedík, D. Mader and M. Kotek
Comparison of exhaust emissions and fuel consumption of small combustion engine of portable generator operated on petrol and biobutanol
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Comparison of exhaust emissions and fuel consumption of small combustion engine of portable generator operated on petrol and biobutanol

B. Peterka¹,*, M. Pexa¹, J. Čedík¹, D. Mader¹ and M. Kotek²

¹ Czech University of Life Sciences Prague, Faculty of Engineering, Department for Quality and Dependability of Machines, Kamycka 129, CZ165 21 Prague 6, Czech Republic
² Czech University of Life Sciences Prague, Faculty of Engineering, Department of Vehicles and Ground Transport, Kamycka 129, CZ165 21 Prague 6, Czech Republic
*Correspondence: peterka@oikt.czu.cz

Abstract:

The paper is focused on the comparison of exhaust emissions and fuel consumption of small internal combustion engines operated on petrol and biobutanol. In case of this research, small engines are represented by combustion engine of portable power generator with nominal power of 4.8 kW equipped with carburettor for fuel mixture preparation. Exhaust emissions and fuel consumption were measured while gradual loading of the combustion engine. BrainBee emission analyser, Bruker FTIR spectrometer and EEPS particle analyser was used for the measurement. The mass fuel consumption was monitored using laboratory scale Vibra. The initial hypothesis expected that exhaust emissions and fuel consumption will be higher in case of use of nonstandard fuels. From the viewpoint of particles count can be stated, that their productions are at very low level for both kinds of used fuels. Production of carbon monoxide and hydrocarbons is higher than in case of usual automobile engine due to simple engine control system and absence of additional emission control device (catalytic converter). The fuel consumption increased while using n-butanol as a result of its lower calorific value.

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167–173 B. Peterka, M. Pexa, J. Čedík and Z. Aleš
The influence of biobutanol on performance parameters of mobile generator
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The influence of biobutanol on performance parameters of mobile generator

B. Peterka, M. Pexa, J. Čedík* and Z. Aleš

Czech University of Life Sciences Prague, Faculty of Engineering, Department for
Quality and Dependability of Machines, Kamycka 129, CZ 165 21 Prague 6,
Czech Republic; *Correspondence: cedikj@tf.czu.cz

Abstract:

The expansion of biofuel also affects the area of using small internal combustion engines, which are widely used in municipal equipment such as minitractors,  chainsaws, mowers and brush cutters. These small engines have their specific  operation conditions, especially given by high operating speeds and high loads. Current legislation for fuel BA 95 prescribes the addition of ethanol. The percentage is however very small nearly not affecting the operation of combustion engines. The paper is focused on biobutanol since it is considered as more advanced type of alcohol based fuel than bioethanol. The measurement is focused on a small combustion engine of portable generator with maximum power of 2.5 kW. There is monitored influence of biobutanol on their performance parameters. As the mixing ratios are in the range of 100% fuel BA 95 (without ethanol) to 100% biobutanol.

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550-557 V. Hönig,, Z. Linhart, J. Táborský and J. Mařík
Determination of the phase separation temperature and the water solubility in the mixtures of gasoline with biobutanol and bioethanol
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Determination of the phase separation temperature and the water solubility in the mixtures of gasoline with biobutanol and bioethanol

V. Hönig¹,*, Z. Linhart², J. Táborský¹ and J. Mařík³

¹Czech University of Life Sciences Prague, Faculty of Agrobiology, Food and Natural Resources, Department of Chemistry, Kamycka 129, CZ16521, Prague 6, Czech Republic; *Correspondence: honig@af.czu.cz
²Czech University of Life Sciences Prague, Faculty of Economics and Management, Department of Management, Kamycka 129, CZ16521, Prague 6, Czech Republic
³Czech University of Life Sciences Prague, Faculty of Engineering, Department for Quality and Dependability of Machines, Kamycka 129, CZ16521, Prague 6, Czech Republic

Abstract:

Original hydrocarbon composition, volatility, compatibility with materials, calorific value and stability of the mixture in the presence of water are monitored usually. This paper deals with the stability of gasoline-biobutanol and gasoline-bioethanol mixtures in the presence of water. Biobutanol is better biofuel than bioethanol using the same raw materials. Different contents of alcohol and oxygenated cosolvents are evaluated. Experimental analysis are focused on the water solubility and phase stability. Solubility in water of butanol and ethanol mixtures is very similar. Butanol-gasoline mixture provides better phase stability upon contact with water or atmospheric moisture oppose to ethanol mixtures. Butanol also does not enter to the aqueous layer and fuel properties remain in phase separation preserved. Further, it was found that crystals occur at low temperatures after exclusion of water was seen. Moreover, the temperature of phase separation can affect the content of alcohol, water, hydrocarbon composition and cosolvents added. The only difference found between more beneficial butanol and less beneficial ethanol was ABE (Aceton–Butanol–Ethanol) fermentation with Clostridium Acetobutylicum allowing to ferment also saccharidic cellulose to biobutanol according to standard of second generation biofuels.

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