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Your search keyword '"Zadrapa, Frantisek"' showing total 4 results
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4 results on '"Zadrapa, Frantisek"'

1. BIOMASS PELLETIZATION OF TREE LEAVES.

Author

Jezerska, Lucie, Zegzulka, Jiri, Rozbroj, Jiri, Necas, Jan, and Zadrapa, Frantisek

Subjects
BIOMASS energy, PELLETIZING, RENEWABLE energy sources, RAW materials, INTERNAL friction
Abstract

One of important renewable energy sources is biomass, which can be used for heat. Leaves as a one type of every major city waste, can also represent a source of energy. The possibility of leaves pelletization process supposes the conversion of the residue into an applicable product. The aim of study was to evaluate the possibility of leave pelletization including characterization of raw materials and pellet properties analysis. It was found the optimal composition of input mixtures using a various amount of binder (starch) and optimal moisture for pelletization process. The first results show the mixtures flow easily with the increase of binder content (free flowing materials). The angle of internal friction and wall friction of studied input mixtures decreases with amount of binder. In the case of pellet analysis, it was found the similar conclusion. [ABSTRACT FROM AUTHOR]

Published
2016

4. Pelletization of invasive Reynoutria japonica with spruce sawdust for energy recovery

Author

Jezerska, Lucie, Zegzulka, Jiri, Palkovska, Barbora, Radmila Kučerová, and Zadrapa, Frantisek

Subjects
waste biomass, mechanical properties of pellets, spruce sawdust, pelletization, Reynoutria japonica
Abstract

The article focuses on processing of Reynoutria japonica an invasive alien species that is generally extirpated with major costs for its negative impact on biodiversity. It is the biodegradable waste that could be effectively used in energy industry. By examining first energy data (ash content, low melting temperature, nitrogen content etc.) it was found that Reynoutria japonica is not possible to be used separately for energy purposes. Therefore, the alternative of pelletizing six mixtures containing Reynoutria japonica and spruce sawdust in various content ratio was examined with the aim to produce alternative fuel pellets for automated boilers. The pelletization conditions were determined and the pellets quality was evaluated (durability, density etc.). Ash melting temperature was also evaluated. It was found none of the prepared mixtures needed an additional binder for a pelletizing process. It was assessed that the Reynoutria japonica input sample did not need to be dried after collection, since its moisture was sufficient for the pelletization. All samples met the parameters of the calorific value, which is greater than 10 MJ. Web of Science 63 6 1058 1045

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