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

2/2014

Influence of LCO on hydrodesulfurization rate and catalyst deactivation

Aneta Prokešová, Michal Zbuzek, Vratislav Tukač, David Kubička

Nowadays trend is a constant increase of consump-tion of diesel fuel. Simultaneously increases demand on production quality. Raw materials with higher aromatic and sulphur components content are added into the inlet streams, at the requirement of maintaining quality of the final product. Therefore, the effect of injecting of light cycle oil (LCO) was studied. LCO contains relatively large amounts of aromatic compounds. Polycyclic aro-matic compounds may negatively affect diesel quality and sulphur content due to inhibiting effect Influence of different amount of LCO in inlet stream on product composition and degree of hydrodesulfurization was observed. On the basis of experimental data deactivation and hydrodesulfurization rate constants were mathemat-ically determined.

2/2014 - pages 45 - 50download PDF file

Separation of biogas by membrane separation processes, overview

Pavel Izák

The work aims to acquaint the reader and the general public with new trends in the biogas purification by membrane separation processes. Article readers will get information about the mechanism of membrane separation processes in porous and nonporous membranes. Separation properties of a thermally modified polymers, supported ionic liquid membranes and water condensing membrane for biogas purification are discussed.

2/2014 - pages 51 - 54download PDF file

Gas explosion limits from thermal desorption of con-taminated soil

Buryan Petr, Hlinčík Tomáš, Skoblia Siarhei, Beňo Zdeněk

This article focuses on low-temperature pyrolysis of dried contaminated soil. Contaminated soil samples come from the lagoon, where the deposited waste is created predominantly from the refining of motor oils. Performed laboratory experiments and analysis indicate that this material can decompose very well at temperatures achievable with the current technological practice (350 °C). A very significant finding is a great development of toxic, flammable and explosive gases. These gases contain mainly carbon monoxide, methane, hydrogen, saturated and unsaturated hydrocarbons C2-C4, hydrogen sulfide and organic sulfur components, etc. This article summarizes the laboratory procedures that were used to start the design of a pilot unit for the decontamination of soil and rock from dams and subsoil of the lagoon.

2/2014 - pages 55 - 58download PDF file

Pyrolysis of Czech brown coal with catalyst based on W-Ni on laboratory unit

Lenka Jílková, Karel Ciahotný, Jaroslav Kusý
Tars from pyrolysis of a brown coal could be re-fined to get compounds suitable for the fuel production. However a refining of liquids from brown coal pyrolysis is difficult because of producing of high molecular compounds what leads to a sample solidification. There-fore we suggested a possibility of the product treatment in gas phase during the pyrolysis using a catalyst. It was suggested a two-step process: the thermic-catalytic refining. In the first step alumina was used and in the second step the catalyst based on W-Ni was used. Alu-mina and the catalyst were placed in layers above the batch of coal, so the volatile products passed through the layers of alumina and catalyst.
Pyrolysis tests have shown that using of catalyst improves the gas properties and the properties of organ-ic part from the liquid product which are deter-mined for the further processing.
2/2014 - pages 59 - 62download PDF file

Fuels and biofuels – searching for solutions

Jiří Plitz

Oil refineries will have the duty to fulfil new requirements to add higher quantity of biofuels to decrease greenhouse gases emissions. The enhancement of biofuels will bring some serious logistic problems. Oil refineries will have to find new solutions. Advanced biofuels is the most promising of them but they will need new investments.

2/2014 - pages 63 - 65download PDF file

Cleaning of hydrogen for energy applications

Jan Hadrava, Roman Vokatý

The text discusses the content of impurities in the produced gas rich in hydrogen and cleaning options. The methods are based on the adsorbent, permeation, washing and other modern processes. Choice a specific technology is dependent on the conditions of entering the cleaned gas. The correct operation of fuel cell is influenced by the content of impurities in the fuel, which must be removed. First of CO and H2S gases for the fuel cell are irreversible impact on the performance and durability of the material.

2/2014 - pages 66 - 72download PDF file

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