Filter

Sort Title Year

Publications


Peer Reviewed Scientific Journals | 2015

The behavior of biomass and char particles in a dual fluidized bed gasification system

Kraft S, Kuba M, Hofbauer H. The behavior of biomass and char particles in a dual fluidized bed gasification system. Powder Technology 2018;338:887-897.

External Link

Details

Biomass gasification in fluidized beds is a complex process in which particles occur in a wide range of size and density. In this paper, the mixing behavior of the char, biomass and bed material in a gasification reactor of a typical dual fluidized bed (DFB) system was investigated in a cold flow model. Experiments with ternary mixtures were performed in which the size and the density of the used particles were varied. For the experiments, a cold flow model was constructed with a full bed material recirculation loop, similar to DFB systems. Experiments revealed that at low fluidization velocities, the smaller char particles and biomass particles occur more preferentially in the bed material recirculation stream. If the fluidization velocities are increased, this tendency diminishes. Furthermore, the experiments showed that the mass fraction of biomass particles in the recirculation stream is always higher than that of the lighter char particles. It is also shown that the current design of the gasification reactor in DFB systems is not optimal. A way to overcome this issue in existing plants is presented.

Conference contributions | 2015

The Influence of Wood Pellet Prices on Heat Generation Costs of Alternative Heating Systems

Kristöfel C, Strasser C, Schmid E. The Influence of Wood Pellet Prices on Heat Generation Costs of Alternative Heating Systems, 23rd European Biomass Conference 2015, 1st-4th of June 2015, Vienna, Austria. (oral presentation)

Details


Conference Papers | 2015

The role of 1H-indene in product gas of biomass gasification

Kuba M, Kirnbauer F, Hofbauer H. The role of 1H-indene in product gas of biomass gasification. International Bioenergy Exhibition and Asian Bioenergy Conference 2015. October 2015, Shanghai, China.

Details


Peer Reviewed Scientific Journals | 2015

The Role of Leak Air in a Double-Wall Chimney

Lichtenegger K, Hebenstreit B, Pointner C, Schmidl C, Höftberger E. The role of leak air in a double-wall chimney. Heat Mass Transfer. 2015;51(6):787-94.

External Link

Details

In modern buildings with tight shells, often room-independent air supply is required for proper operation of biomass stoves. One possibility to arrange this supply is to use a double-wall chimney with flue gas leaving through the pipe and fresh air entering through the annular gap. A one-dimensional quasi-static model based on balance equations has been developed and compared with experimental data. Inclusion of leak air is crucial for reproduction of the experimental results. © 2014, Springer-Verlag Berlin Heidelberg.


Conference contributions | 2015

Time-resolved characterization of PM10 emissions from modern small scale biomass combustion units, including PAHs

Kistler M, Schmidl C, Cetintas EC, Padouvas E, Bauer H, Puxbaum H, Kasper-Giebl A. Time-resolved characterization of PM10 emissions from modern small scale biomass combustion units, including PAHs, 23rd European Biomass Conference 2015, 1st-4th of June 2015, Vienna, Austria. (visual presentation)

Details


Peer Reviewed Scientific Journals | 2015

Use of Hazelnut's Pruning to Produce Biochar by Gasifier Small Scale Plant

Colantoni A, Longo L, Evic N, Gallucci F, Delfanti L. Use of Hazelnut‟s Pruning to Produce Biochar by Gasifier Small Scale Plant. International Journal of Renewable Energy Research. 2015;5(3):873-878.

External Link

Details

Biochar is the product of biomass pyrolysis and gasification. One of the possible application of this product is certainly in agronomic sector, as soil amendment. However biochar use in Italy is subordinated to insert this product in fertilizer list, which biochar could be commercialized with. The aim of this paper is to know the biochar from gasification process (using an Imbert downdraft prototype), in particular investigating its potentiality as soil amendment in terms of European and Italian regulations and in terms of physical and chemical characterizations.


Conference Papers | 2015

Validation of a Kinetic Model for the Catalyzed Water Gas Shift Reaction Applying a Fe/Cr Catalyst Processing Wood Gas from Biomass Steam Gasification

Kraussler M, Fail S, Plaza Quevedo A, Cortes Guerro JA, Rauch R, Hofbauer H. Validation of a Kinetic Model for the Catalyzed Water Gas Shift Reaction Applying a Fe/Cr Catalyst Processing Wood Gas from Biomass Steam Gasification. 23rd European Biomass Conference & Exhibition (Poster). June 2015, Vienna, Austria.

Details


Peer Reviewed Scientific Journals | 2015

Ventilation of Carbon Monoxide from a Biomass Pellet Storage Tank - A Study of the Effects of Variation of Temperature and Cross-Ventilation on the Efficiency of Natural Ventilation

Emhofer W, Lichtenegger K, Haslinger W, Hofbauer H, Schmutzer-Roseneder I, Aigenbauer S, et al. Ventilation of carbon monoxide from a biomass pellet storage tank - A study of the effects of variation of temperature and cross-ventilation on the efficiency of natural ventilation. Ann Occup Hyg. 2015;59(1):79-90.

External Link

Details

Wood pellets have been reported to emit toxic gaseous emissions during transport and storage. Carbon monoxide (CO) emission, due to the high toxicity of the gas and the possibility of it being present at high levels, is the most imminent threat to be considered before entering a pellet storage facility. For small-scale (<30 tons storage capacity) residential pellet storage facilities, ventilation, preferably natural ventilation utilizing already existing openings, has become the most favored solution to overcome the problem of high CO concentrations. However, there is little knowledge on the ventilation rates that can be reached and thus on the effectiveness of such measures. The aim of the study was to investigate ventilation rates for a specific small-scale pellet storage system depending on characteristic temperature differences. Furthermore, the influence of the implementation of a chimney and the influence of cross-ventilation on the ventilation rates were investigated. The air exchange rates observed in the experiments ranged between close to zero and up to 8 m3h-1, depending largely on the existing temperature differences and the existence of cross-ventilation. The results demonstrate that implementing natural ventilation is a possible measure to enhance safety from CO emissions, but not one without limitations. © 2014 © The Author 2014. Published by Oxford University Press on behalf of the British Occupational Hygiene Society.


Conference contributions | 2014

"BioCAT – Clean air technology for small-scale combustion systems"

Reichert G, Wöhler M, Schwabl M, Schmidl C, Aigenbauer S, Bachmaier H, Figl F, Hartmann H, Haslinger W, Kirchhof J, Stressler H, Sturmlechner R, Turowski P, Voglauer B. BioCAT – Clean air technology for small-scale combustion systems, 4. Central European Biomass Conference 2014, 15th-18th of January 2014, Graz, Austria. (oral presentation)

Details


Conference contributions | 2014

Active condensation in a 10MW heating plant - measurement results from the first heating season

Hebenstreit B, Höftberger E, Schwabl M, Lundgren J, Toffolo A. Active condensation in a 10MW heating plant - measurement results from the first heating season, 4th Central European Biomass Conference 2014, 15th-18th of January 2014, Graz, Austria.

Details


Conference contributions | 2014

Advanced Biofuels Technologies – R&D in Austria

Bacovsky D, Wörgetter M. Advanced Biofuels Technologies – R&D in Austria, Fuels of the Future 2014, 20th-21st of January 2014, Berlin, Germany.

Details


Conference contributions | 2014

Air quality management and biomass burning at domestic level

Aigenbauer S, Bachmaier H, Figl F, Hartmann H, Haslinger W et al. Air quality management and biomass burning at domestic level, Progetto Fuoco 2014, 19th-23rd of February 2014, Verona, Italy.

Details


Contributions at other events | 2014

Analysis of Environmental and Economic Aspects of International Pellet Supply Chains

Ehrig, R. Analysis of Environmental and Economic Aspects of International Pellet Supply Chains, Ph.D. Thesis, Vienna University of Technology, Vienna, Austria, 2014.

Details

Biomass plays a key role to achieve the EU's 20-20-20 energy and climate targets. Because of rising European demand and limited domestic resources, the EU relies on worldwide imports. Given this framework, the present thesis explores the inuences on wood pellet supply chains considering dierent environmental policies, price risks and the eect of torrefaction pretreatment. The examinations refer to three real case studies for pellet trade from Australia, Canada, and Russia to Europe. In the rst investigation, the eciency of co-ring imported wood pellets in terms of CO2 savings and related subsidy schemes is analysed. Scenarios show that co-ring biomass is ecient to contribute to the EU energy targets. Though, policy makers could use these instruments more eective when directing sourcing decision towards options with even less environmental impacts. The second analysis explores the inuence of statistically derived price risks on total supply chain economics. It is shown that price risks can eect strong uctuations in the short term, which seriously aect the protability of individual trade routes. Securing the supply chain is mainly based on individual producer-buyer agreements, personal branch experiences and fast reactions on the subsidy system. Systematic evaluation of supply chains could contribute to a more reliable market and thus foster investment decisions. In the last investigation, the economic and environmental performance of potential torrefaction-based supply chains is assessed. As a result, torrefaction-based supply
chains turn out to be a certain alternative to conventional ones. Though, still huge research eorts and industrial demonstration are required to make torreed biomass a real alternative on the market.

 


Contributions to trade journals | 2014

Analysis of woody biomass commodity price volatility in Austria

Kristöfel C, Strasser C, Morawetz UB, Schmidt J, Schmid E. Analysis of woody biomass commodity price volatility in Austria. Biomass Bioenergy. 2014;65:112-124.

External Link

Details

Several energy and agricultural commodities have experienced higher price volatility in recent years. Management of price risks usually leads to additional costs that are often shared and transmitted along the supply chain to the final consumers. Only little information is currently available on how price volatility of woody biomass commodities has developed compared to energy and agricultural commodities in recent years. We compute the historic price volatility of woody biomass commodities using the standard deviation of log returns as well as univariate GARCH models. The results show that the price volatility of several woody biomass commodities has increased in recent years. However, the price volatility of woody biomass is still lower compared to the price volatility of agricultural commodities and fossil fuels. The analysis of factors and linkages provides insights of the current biomass market developments.


Conference contributions | 2014

Applicability survey of different torrefied biomass fuels in small scale appliances

Feldmeier S, Schwabl M, Wopienka E, Strasser C, Haslinger W. Applicability survey of different torrefied biomass fuels in small scale appliances, 22nd European Biomass Conference 2014, 23rd-26th of June 2014, Hamburg, Germany. p 662-666.

Details

The torrefaction process is a promising key technology for biomass treatment. An improvement of the fuel properties, e.g. a higher gross calorific value and a resulting increased energy density, is expected. The changed fuel properties in terms of water repellence enable an improved storability. However, the modified fuel characteristics change the combustion behaviour of the fuel. Since small­scale pellet boilers mainly are dedicated to wood pellets, the applicability of torrefied fuel yet remains unclear. Within the EU FP7 project SECTOR, amongst others, the end­use application of torrefied biomass was investigated in several small scale appliances and the behaviour during the stationary operational conditions of the combustion process was assessed. The experimental design was divided in two parts: First, a survey of the combustion appliances was conducted in order to observe the influence of the changed fuel properties on the different boiler systems. Afterwards, the combustion behaviour of torrefied pellets made of different raw material quality was monitored by utilizing the test fuels and monitor the emission release. The results of these experimental series provide an initial indication for the feasibility of the utilization of several torrefied fuels in state­of­the­art pellet boilers.


Conference contributions | 2014

Application of a Model Based Control Strategy at a Fixed Bed Biomass District Heating Plant

Zemann C, Heinreichsberger O, Gölles M, Brunner T, Dourdoumas N, Obernberger I. Application of a Model Based Control Strategy at a Fixed Bed Biomass District Heating Plant. 22nd European Biomass Conference and Exhibition Proceedings. 2014;1698-1705.

Details


Conference contributions | 2014

Ash melting behaviour of solid biofuels in residential pellet boilers

Schwabl M, Feldmeier S, Wopienka E, Haslinger W, Dahl J, Jensen TB, Hartmann H, Schön C, Boman C, Boström D. Pellets Workshop “Ash melting behaviour of solid biofuels in residential pellet boilers” (held held during the Central European Biomass Conference 2014), 15th-18th of January, Graz, Austria, 2014.

Details


Conference contributions | 2014

Bi-directional networks in district heating systems: Results of the heat flow simulaiton

Lichtenegger K, Wöss D, Halmdienst C, Schnetzinger R, Höftberger E. Bidirectional Networks BiNe, Workshop “ Bi-directional networks in district heating systems: Results of the heat flow simulation” (held during the Central European Biomass Conference 2014), 15th-18th of January, Graz, Austria, 2014.

Details


Conference contributions | 2014

Bilanzierung und Optimierung des Zweibett-Wirbelschicht-Dampfvergasers Oberwart mit IPSEpro

Wilk V, Bosch K, Hofbauer H. Bilanzierung und Optimierung des Zweibett-Wirbelschicht-Dampfvergasers Oberwart mit IPSEpro, Fachtagung Prozesssimulation in der Energietechnik 2014, 10th of September 2014, Leipzig, Germany.

Details


Peer-reviewed publications | 2014

Biodiesel Production in Africa

Walimwipi H, Yamba FD, Wörgetter M, Rathbauer J, Bacovsky D. Biodiesel production in Africa. Bioenergy for sustainable development in Africa. ISBN 978-94-007-2181-4 2012:93-102.

Details


Conference contributions | 2014

Biograce-II - Harmonised Greenhouse Gas Calculations for Electricity, Heating and Cooling from Biomass

Ludwiczek N, Bacovsky D, Neeft J. Biograce-II - Harmonised Greenhouse Gas Calculations for Electricity, Heating and Cooling from Biomass, 22nd European Biomass Conference 2014, 23rd-26th of June 2014, Hamburg, Germany. p 1359-1361.

Details


Contributions at other events | 2014

Biohydrogen Production Based on the Catalyzed Water Gas Shift Reaction in Wood Gas

Fail, S. Biohydrogen Production Based on the Catalyzed Water Gas Shift Reaction in Wood Gas, Ph.D. Thesis, Vienna University of Technology, Vienna, Austria, 2014.

Details


Conference contributions | 2014

Biomass CHP Oberwart –Production of heat, power and valuable gases

Rauch R. Biomass CHP Oberwart –Production of heat, power and valuable gases, 4th Central European Biomass Conference 2014, 15th-18th of January 2014, Graz, Austria.

Details


Conference contributions | 2014

Biomass CHP Oberwart: Status and Future Potentials

Wilk V, Bosch K, Rauch R, Hofbauer H. Biomass CHP Oberwart: Status and Future Potentials, 4th International Symposium on Gasification and its Applications (iSGA-4) 2014, 2nd-5th of September 2014, Vienna, Austria.

Details


Other publication | 2014

Biomass Gasification for Synthesis Gas Production and Applications of the Syngas

Rauch R, Hrbek J, Hofbauer H. Biomass gasification for synthesis gas production and applications of the syngas. Wiley Interdisciplinary Reviews: Energy and Environment. 2014;3(4):343-62.

External Link

Details

Synthesis gas from biomass can be produced and utilized in different ways. Conversion of biomass to synthesis gas can be done either in fluidized bed or entrained flow reactors. As gasification agent oxygen, steam, or mixtures are used. The most common use of biomass gasification in the last decades has been for heat and/or power production. Nowadays, the importance of transportation fuels from renewables is increased due to environmental aspects and growing fossil fuels prices. That is why the production of Fischer-Tropsch (FT) liquids, methanol, mixed alcohols, substitute natural gas (SNG), and hydrogen from biomass is now in focus of view. The most innovative and interesting ways of synthesis gas utilization and projects, BioTfueL or GoBiGas, BioLiq, Choren, etc. are discussed here. Further the microchannel technology by Oxford Catalysts and distributed production of SNG in decentral small scale are presented. The synthesis platform in Güssing, Austria is also presented. The FT liquids, hydrogen production, mixed alcohols, and BioSNG, these are the projects associated with the FICFB gasification plant in Güssing. Also the principle and examples of sorption-enhanced reforming to adjust H2/CO ratio in product gas during the gasification is described. Finally, in the conclusion also an outlook for the thermochemical pathway to transportation fuels is given. WIREs Energy Environ 2014, 3:343-362. doi: 10.1002/wene.97 For further resources related to this article, please visit the WIREs website. © 2013 Wiley Periodicals, Inc.


Contact Us

We invite you to contact our office under office@bioenergy2020.eu or a member of our personnel directly from this website. Fast and simple.

To Our Team Page