PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 7

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  produkcja biodiesla
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Benefits of exhaust gas energy for preheating biodiesel fuel to enhance engine emissions and performance
Mourad Mohamed, Noureldenn Elsadek H.
Journal of Mechanical and Energy Engineering
|
2019
|
Vol. 3, No 2
157--167
EN
The need for alternative fuel instead of conventional fossil fuels (diesel or gasoline) has recently increased for several reasons, including the expected shortage of petroleum fossil fuels and the production of pollution by transportation. Consequently, researchers are interested in finding new alternative fuels. At present, the number of studies on biodiesel as a compression ignition engine fuel has increased. Current studies are mainly concerned with studying the use of exhaust gas temperature to preheat biodiesel fuel before it enters the combustion chamber. A heat exchanger is designed to increase the temperature of the biodiesel fuel prior to the combustion process. The performance characteristics of diesel engines and the emission of pollutants resulting from this modification were investigated under different operating conditions, including different engine loads and speeds. The results showed clear improvements in engine performance, including improved output power, specific fuel consumption and pollutant emissions. The engine power and specific fuel consumption improvements as a result of preheating reached up to 1.3% and 8.27%, respectively. Pollutant emission also decreased obviously, with carbon monoxide and hydrocarbon emission decreases of 12.95% and 12.85%, respectively. However, the emission of nitrogen oxides increased by 4.39%.
2
Content available remote Zastosowanie niekonwencjonalnych surowców oleistych w syntezie biodiesla
Skrzyńska E., Wondołowska-Grabowska A., Stalmach E., Szynal M., Leśniak M.
Przemysł Chemiczny
|
2016
|
T. 95, nr 10
1952--1955
PL
Przedstawiono wyniki badań nad użyciem niekonwencjonalnych olejów do produkcji biodiesla. Surowce tłuszczowe otrzymano przez wytłaczanie lub ekstrakcję nasion 15 gatunków roślin oleistych. Na podstawie analiz składu chemicznego oraz pomiaru gęstości, lepkości, analizy wartości liczb charakterystycznych oraz właściwości wysoko- i niskotemperaturowych oceniono przydatność zsyntezowanych mieszanek estrów metylowych kwasów tłuszczowych do produkcji biodiesla w świetle obowiązujących norm.
EN
Fifeen plants were considered as raw materials for prodn. of biodiesel fuels. Their seeds were studied for dry mass, fats, ash, fibers and proteins and pressed or extd. with Me₂CO to recover the oil components. The oils were transesterified with MeOH to prep. resp. fatty acid Me esters examd. then for chem. compn., d., viscosity, acid, sapon. and iodine values, as well as for low- and high-temp. properties. The fuels prepd. from white mustard oil (Sinapis alba L.), hempseed oil (Cannabis sativa L.) and poppy oil (Papaver somniferum L.) seeds were recognized as the most promising, as they fulfilled the requirements of biodiesel stds. (low content of polyunsatd. fatty acid esters, concn. of linolenic acid below 12% by mass, viscosity between 3.5–5.0 mm²/s at 40°C, d. between 860–900 kg/m³ at 15°C, acid value below 0.5, iodine value below 120, flash point above 101°C and cloud points between –5°C and 5°C).
3
Content available remote The influence of methyl esters on viscosity of biodiesel from waste and rapeseed oil blends
Pomenić L., Jurac Z.
Archives of Materials Science and Engineering
|
2013
|
Vol. 62, nr 2
73--77
EN
Purpose: The aim of this article is to present problems in the production of energy from the renewable resources as is a biodiesel production. The use of human foods that are pure edible oils for biodiesel production is big ethical problem. This problem can be reduced with use of waste cooking oils for the biodiesel production. Besides this use of the waste cooking oils will reduce the raw material cost and also reduce the environment pollution that is a global problem. Design/methodology/approach: This article includes analysis and estimation of the methyl esters impact to the kinematic viscosity of biodiesels produced from various percentages of waste cooking oils and crude rapeseed oil blends. One of the most important physical properties of biodiesel that affect its use value is kinematic viscosity properties which are directly dependent on the composition of raw materials. After the transesterification process mono-alkyl esters (biodiesel), glycerol (main co-product), alcohol, catalyst, free fatty acids, residual glycerides compose the final mixture of biodiesel production process. Some important issues on the biodiesel quality control involve the monitoring of transesterification process with the quantification of mono-alkyl esters. Findings: With an increase of methyl esters content the kinematic viscosity of produced biodiesels decreases for both waste cooking oils WCO1 and WCO2, used for biodiesel production in various blends with crude rapeseed oil. Practical implications: The results presented in the paper can be applied in the industry for estimation and selection of the optimal percentages of waste cooking oils and crude rapeseed oil blends for the biodiesel production. Originality/value: This paper presents research of the influence of methyl esters on kinematic viscosity of biodiesels produced from the various blends of waste cooking oils and crude rapeseed oil. The further testing and improvements in waste oils purification and in transesterification process can lead to the better yield in biodiesel production.
4
Content available Badanie zastosowania CaO przy transestryfikacji oleju rzepakowego do estrów wyższych kwasów tłuszczowych
Grygiel D., Komsta H.
TTS Technika Transportu Szynowego
|
2012
|
R. 19, nr 9
1309--1314, CD
PL
W artykule przedstawiono wyniki badań zastosowania tlenku wapnia CaO jako katalizatora przy produkcji biodiesla. Z uwagi na to że stosowany najczęściej, w tym procesie, katalizator KOH jest relatywnie drogi, sprawdzono możliwość zastosowania kompozycji katalizatorów CaO+KOH w procesie transestryfikacji oleju rzepakowego. Wyniki badań wykazały wpływ CaO na jakość otrzymanego produktu.
EN
The paper presents the results of the research on the use of calcium oxide CaO as a heterogeneous catalyst in biodiesel production. Since the currently used catalyst KOH is relatively more expensive, the use of CaO+ KOH catalyst combination in the process of rapeseed oil transesterification process has been investigated. The results have confirmed the positive influence of the CaO+KOH combination on the quality of the product.
5
Zagospodarowanie ubocznych produktów syntezy biodiesla
Sulewski M., Urbaniak W.
Czysta Energia
|
2011
|
Nr 6
27-28
6
Content available remote Jonity w produkcji i oczyszczaniu biodiesla oraz oczyszczaniu i zagospodarowaniu glicerolu
Kociołek-Balawejder E., Pińkowska H.
Przemysł Chemiczny
|
2008
|
T. 87, nr 10
1012-1018
7
Content available remote Instalacja biodiesla w Rafinerii Trzebinia
Berny D.
Wiadomości Naftowe i Gazownicze
|
2005
|
R. 8, Nr 9 (89)
11-12
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.