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.
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Current issue

Dear readers,

welcome to the website of the journal Paliva (Fuels). The journal is published quarterly in online format, which allows a broad and rapid access for readers. The journal is open not only to researchers but also for technicians and other professionals working in plants, refineries, power stations, gasworks and companies processing, handling or trading both fossil and alternative fuels. The aim of the journal is to share information between professional research organizations and users of research results.
Since 2010 the journal Paliva (Fuels) is included in the list of recognized peer-reviewed journals, issued by the Research, Development and Innovation Council of the government of the Czech Republic. Amongst other requirements that must be met to be a member of the group of journals, all papers published in the journal undergo a review process by two independent reviewers.
We sincerely hope you become regular readers of the journal and perhaps contributors in its future issues. Thank you.

Karel Ciahotný
editor in chief

Fuels Journal was included in the CAS databases

We are proud to annouce that Paliva (Fuels) Journal was successfully evaluated by Chemical Abstracts Service (CAS) and included to the CAS databases among more than 10 thousand scientific journals worldwide. Starting with the 2015 issues, CAS collects bibliographic information and abstracts of articles issued by Fuels, which makes the access to the findings published in the journal substantially easier for scientists and field specialists from over the world.

Current issue:

Pyrolysis of Sewage Sludge

Veronika Kyselová, Lenka Jílková, Karel Ciahotný, Jaroslav Kusý, Josef Valeš, Lukáš Anděl
Sewage sludge is an inevitable by-product from waste water treatment plants. Increasing population leads to increased waste sludge production. In this work, sludges from six waste water treatment plants in the Central Bohemia were tested, which were divided according to the production of drained sludge for 2016. Basic samples were analyzed for individual samples, including water content, ash determination and elemental analysis.
Subsequently, the dried sludge samples were pyrolyzed on a pilot unit at 650 ° C. During the pyrolysis, the volume of the gas evolved, the temperature inside the reactor was taken and samples of the pyrolysis gas were drawn off and the liquid pyrolysis product was withdrawn. After the pyrolysis was completed, the mass balance of the pyrolysis products was carried out and analyzed.
3/2018 - pages 75 - 84download PDF file

Comprehensive evaluation of rice husks as a potential solid biofuel

Van Minh Duong, František Skácel, Jitka Hrbek

As the common crop residues in Vietnam, rice husks can potentially be a technically efficient, economically viable and environmentally sustainable bio-energy option, release a considerable heat for thermo-chemical conversion systems. The report provides a comprehensive evaluation in the nature, physico-chemical property, fuel characteristic, ash composition and transformation phenomena of this biofuel. Analysed results show significant calorific value (16-17 MJ/kg), high ash and volatile contents, low S, Cl contents in the test pieces. Low alkali cations were reported in the ash compositions while the obtained Si value was relatively high. Ash softening and fusion processes were determined with heat generated continuously at constant rates (maintained at 550 ± 10 °C for 120 minutes, at 850 ± 10 °C for 240 minutes). First signs of deformation were recorded at temperature above 1450 °C, whereas volume expanding and bursting of internal gas bubbles were not presented. Further elemental determination of ash compositions explains the decomposition of ash-forming elements (Ca, Mg, Fe, Al, K, Na and P), by further oxidation (to higher oxidation states) and partial losses of volatile inorganic compounds.

3/2018 - pages 85 - 88download PDF file

Analysis of Nonvolatile Fractions of Bio-oils From Pyrolysis of Cellulose, Hemicellulose and Lignins

Martin Staš, Aneta Závodníková, Miloš Auersvald, Josef Chudoba, Pavel Šimáček, David Kubička
Bio-oils from biomass pyrolysis are second-generation biofuels that have, besides fuel applications, a promising potential to be used as a source of valuable oxygen-containing chemicals. A more widespread use of bio-oils requires more detailed knowledge of their chemical composition. In this work, we studied the chemical composition and the physical and chemical properties of bio-oils from slow and fast pyrolysis of the basic building components of biomass, i.e. cellulose, hemicellulose and lignin. The work is divided into two articles. The first part was devoted to (i) the presentation of the results of the analyses of pyrolysis feedstock, (ii) the description of the preparation of bio-oils and (iii) the presentation of the results of the analyses of physical and chemical properties of the bio-oils and their volatile fractions. Here, in the second article, the attention is given to the characteriza-tion of less volatile and nonvolatile components of the prepared bio-oils. High-resolution orbitrap mass spec-trometry was used for these analyses. Using the methods described in both articles, a comprehensive characteriza-tion of the prepared bio-oils was achieved. The obtained knowledge can be helpful to understand the chemical compositions of entire bio-oils and facilitate their more widespread use.
3/2018 - pages 89 - 99download PDF file


technical support editor-in-chief