National Repository of Grey Literature 119 records found  beginprevious102 - 111next  jump to record: Search took 0.01 seconds. 
Energetic Utilization of Phytoextraction Crops
Šyc, Michal ; Pohořelý, Michael ; Jeremiáš, Michal ; Vosecký, Martin ; Kameníková, Petra ; Punčochář, Miroslav ; Tlustoš, P.
The main objective of submitted paper is to determine heavy metals distribution between different ash fractions during thermochemical conversion of contaminated biomas in fluidized bed reactor. Moreover, heavy metals behaviour in oxidation and reduction reaction atmosphere is different; hence comparison of heavy metals distribution during gasification and combustion of the same fuel is introduced.
Fluidized Bed Gasification of Coal-Oil and Coal-Water-Oil Slurries by a Gas Containing Carbon Dioxide-Oxygen Mixture
Svoboda, Karel ; Pohořelý, Michael ; Jeremiáš, Michal ; Kameníková, Petra ; Skoblia, S. ; Šyc, Michal
Direct use of CO2 instead of steam or as a partial substitute for steam in coal and biomass direct gasification processes is one of possibilities of potential useful application of CO2. Based on the above stated facts we concentrated in our study on FB gasification of COS and COWS slurries with gases containing higher concentrations of CO2. Our attention was particularly devoted to effects of CO2 concentrations and gasification temperature on producer gas heating value, energy yield, tar and BTX yields in comparison with FB gasification with steam-O2 mixtures.
BtL, Gasification Part
Pohořelý, Michael ; Punčochář, Miroslav ; Jeremiáš, Michal ; Kameníková, Petra ; Vosecký, Martin
Presented study deals with possible up-to-date processes of biomass to alternative transportation fuels conversion via synthesis gas production and its subsequent transformation.
Fluidized Bed Gasification of Flax used for Phytoextration of Heavy Metals
Pohořelý, Michael ; Šyc, Michal ; Jeremiáš, Michal ; Vosecký, Martin ; Kameníková, Petra ; Skoblia, Sergej ; Svoboda, Karel ; Punčochář, Miroslav
This study was aimed at determination of distribution of heavy metals among producer gas and individual size fractions of ash matter, i. e. bed ash and cyclone ash, formed in fluidized bed steam biomass gasification. Knowledge of distribution of heavy metals is necessary for further utilization of all products of the gasification.
Vliv přídavku oxidu uhličitého ke zplyňovacímu médiu při atmosférickém zplyňování vodní parou ve fluidním loži křemenného písku a vápence
Jeremiáš, Michal ; Pohořelý, Michael ; Vosecký, Martin ; Skoblia, Sergej ; Kameníková, Petra ; Svoboda, Karel ; Punčochář, Miroslav
The aim of this project was to evaluate the effect of addition of CO2 to the gasification agent during allothermal steam fluidized bed gasification of biomass at constant temperature about 800 °C. Moreover, the effect of different fluidized bed materials such as silica sand and limestone together with the effect of temperature on producer gas composition was also examined. Experiments led to conclusions that CO2 added to the gasification agent was converted to CO to only very limited extent while CO2 dilution effect was relatively strong. The CO2 to CO conversion was exhanced by the use of limestone as the bed material. Limestone showed also strong catalytic activity towards reduction in tar content in the producer gas and higher production of H2, CO2 and CO in comparison with silica sand. Optimal temperature for in the bed-use of limestone in the gasification process was proposed to be around 850 °c under the given experimental conditions.
Allothermal Fluidized Bed Biomass Gasification-
Jeremiáš, Michal ; Pohořelý, Michael ; Vosecký, Martin ; Skoblia, Sergej ; Kameníková, Petra ; Svoboda, Karel ; Punčochář, Miroslav
The influence of reactor temperature and material of the fluidized bed on gas composition and yield was studied.
Vedlejší (nežádoucí) úniky plynu a cirkulace částic písku a koksíku v duálním systému s fluidní vrstvou a pneumatickým transportem – vliv návrhových parametrů a provozních podmínek
Svoboda, Karel ; Kalisz, S. ; Martinec, J. ; Pohořelý, Michael
Our study has been concentrated on influence of geometric parameters (height of cylindrical chamber for pneumatic transport (PT), flat perforated sheet and conical gas distributor, different upper part for return of solids, total orifice cross sectional area) and operating parameters (gas flow rate in PT-column, height of fluidized bed) on circulating flow of solids. In a limited extend gas leakage study on a dual fluidized bed (FB)-PT system for circulation of solids has been performed.
Biomass Gasification and Producer Gas Utilisation
Čermáková, J. ; Vosecký, Martin ; Skoblia, Sergej ; Pohořelý, Michael ; Hejdová, Petra
This article deals with biomass gasification and producer gas utilisation.
Leaching of Zn, Cd, Pb, a Cu from Penny-Cress (Thlaspi caerulescens) Used for Phytoremediation
Pohořelý, Michael ; Šyc, Michal ; Tlustoš, P. ; Habart, J. ; Punčochář, Miroslav
This work deals with decontamination technology – phytoextraction, which is used for decontamination of soil in-situ. Studied plant was penny-cress (Thlaspi caerulescens) that serves as hyperaccumulator of heavy metals.

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