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Gewählte Master / Diploma Thesis:

Paul Zanzinger (2021): Verbrennung von additiviertem Pappelhackgut in einer 20-kW-Wirbelschichtanlage.
Master / Diploma Thesis - Institut für Verfahrens- und Energietechnik (IVET), BOKU-Universität für Bodenkultur, pp 74. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
There is currently a lot of discussion about global warming and climate change due to greenhouse gases produced by the use of fossil fuels. The supply of fossil fuel reserves is approaching their natural end and that is why there is a meticulous search and research for substitute raw materials. Biomass as a raw material has long been known to mankind as a resource and has moved into the focus of research due to its CO2 neutrality and regional availability. In the form of wood chips, wood is obtained as fuel and used in incineration plants designed for this purpose. It is a long way from the tree to the final utilization of the fuel. Especially when storing the wood chips, there is a loss of dry matter and this results in a lower economic profit for the operator. Therefore, there are approaches and attempts to reduce this storage loss, which is caused by microbiological processes. One approach is to enrich the stored goods with additives to reduce or even stop the negative effects of microbiological processes. The additive calcium hydroxide was used for this work. The additive raises the pH value and reduces the microbiological activity. However, the additive also changes the chemical composition of the fuel. This can have positive, but also negative effects on ash melting behaviour, gas formation and agglomerations in the combustion chamber. Therefore, studies are necessary to show the effects of additives on the combustion process. This work focuses on fluidized bed technology. Combustion tests with poplar wood chips with and without additive were carried out in a stationary fluidized bed system with poplar wood chips as feedstock added to it, in order to investigate the effects of the additive on the combustion process. The focus was placed on the formation of agglomerations in the bed material and the positive or negative effects of this additive on the combustion process.

Beurteilende*r: Pfeifer Christoph
1.Mitwirkender: Hrbek Jitka

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