Paliva (Fuels) is a scientific journal issued quarterly by the Faculty of Environmental Technology, ICT Prague. Fuels publishes papers on a broad range of topics covering exploitation, processing, upgrading, and utilization of various types of fuels, and power engineering.
English Česky
Current issue

3/2014

Gaseous Motor Fuels for Road Vehicles in the Czech Republic

Josef Laurin
The expectations that economically recoverable deposit of crude oil, i.e. the feedstock for producing the conventional motor fuels, diesel and petrol, will be depleted during the 21st century motivate major engine and vehicle manufacturers to develop alternative vehicle driving systems, these also include spark ignitron gas engines in addition to hybrid and electric engines.
The contribution briefly describes the key gaseous motor fuels, i.e. natural gas, LPG and hydrogen, and their properties, methods for their storing in vehicles, and the sources, production, distribution and market prices of these fuels, including their expansion in the Czech Republic.
3/2014 - pages 73 - 77download PDF file

Separation of CO2 from biogas by membrane modules

Veronika Vrbová, Karel Ciahotný, Kristýna Hádková
Biogas is produced by anaerobic methane fermen-tation of organic material. The main product is gaseous mixture of methane and carbon dioxide and liquid or-ganic residue containing solid compounds. The biogas is usually burned in cogeneration units for combined heat and power. During the summer is low heat con-sumption. For this reason, technologies for the biogas upgrading to the biomethan are being developed. The biogas is modified to biomethane, containing me-thane in the concentration higher than 95 %; it is possible to use it as a fuel for vehicles, or it may be injected to the local gas distribution network.
There are several technologies for removing of carbon dioxide from biogas. One way is to use mem-brane separation. Two types of membrane modules for the separation of carbon dioxide were tested in real conditions. We observed affect gas flow modules and pressure influence on the separation efficiency of car-bon dioxide from biogas. The separation of CO2 was tested from real biogas produced on the Central waste water treatment plant in Prague Bubeneč.
3/2014 - pages 78 - 82download PDF file

The quality of petrol engines fuels: Quality control and effect on operation of the vehicle and emis

Dan Vrtiška, Pavel Šimáček

Qualitative parameters of gasoline and E85 were assessed in relation to the impact to fuel system, petrol vehicles driving characteristics and environment. Quality of gasoline distributed in the Czech market was reviewed too. The results of inspections which were car-ried out by Czech Trade Inspection Authority in the years 2007 - 2013 showed that the most common type of contamination of gasoline is so called cross-contamination. This type of contamination is caused by the presence of other fuels, such as diesel. E85 is a mixture of gasoline and ethanol used as a fuel suitable for vehicles called Flexi Fuel Vehicle. The use of this fuel in conventional vehicles with petrol engine can cause problems (e.g. increase of NOx emission).

3/2014 - pages 83 - 89download PDF file

The quality of diesel engines fuels: Quality control and effect on operation of the vehicle and emis

Dan Vrtiška, Pavel Šimáček

Qualitative parameters of diesel, biodiesel B100 and mixed fuel B30 were assessed in relation to the impact to fuel system, diesel vehicles driving character-istics and environment. Quality of diesel fuel sold on the Czech market was reviewed too. The results of inspec-tions carried out by Czech Trade Inspection Authority in the years 2007 - 2013 showed, that the most common cause of non-conforming diesel fuel is contamination caused by the presence of other fuels, such as gasoline. Another part of the article is devoted to alternative fuels with a high proportion of fatty acid methyl esters, which are used in the Czech Republic.

3/2014 - pages 90 - 96download PDF file

 - http://www.vscht.cz/homepage/ftop/index/studium/NoveObory
 - http://www.petroleum.cz
 - http://hitecarlo.vscht.cz

technical support editor-in-chief