Simulation and Experimental Continuous Biochar Production from Flower Waste

dc.contributor.advisorWondwossen, Bogale (PhD)
dc.contributor.authorGeremew, Nigussie
dc.date.accessioned2019-01-22T11:06:54Z
dc.date.accessioned2023-11-18T06:32:15Z
dc.date.available2019-01-22T11:06:54Z
dc.date.available2023-11-18T06:32:15Z
dc.date.issued2018-10
dc.description.abstractPyrolysis plays a major role in investigation of continuous biochar production from flower waste. It is a thermal decomposition processes that occurs at moderate temperatures in which the biomass is slowly heated in the absence of oxygen or air to produce biochar. Once the flower have been harvested its waste is usually thrown away without consideration for other uses. Freesia Ethiopia Plc. is one of the flower producer in Ethiopia located in Sululta. It produces approximately 700kg waste per day. This waste is thrown away to the field without considering for other use. As fossil fuel is depleting, there is an urgent need to exploit any type of biomass as renewable sources by converting them to various forms of green fuels such as biochar. The main objective of this research is to use simulation and experimental investigation of continuous biochar production from flower waste. The simulation is done by modelling two reactors the inner and outer and simulating the temperature distribution along the length of the reactor and energy flows through them. The overall methods used for this research paper is described as follows. First feed stock collection, preparation, its ultimate and proximate analysis i.e. characterization has been performed. Second, the three dimensions of the reactor with the screw conveyor is modelled using CATIA software and then imported in COMSOL5.0. Then after temperature profile along the length of reactor has been simulated to study temperature distribution. Subsequently, heat flux were added to investigate the temperature profile on the reactor and product yields. Finally, manufacturing and experimental investigation was conducted. Using slow pyrolysis process great biochar yields could be produced for the experiment conducted with the pyrolysis temperature of 293 o C to 773 o C at heating rate of 50 o C/min. An original screw reactor machine which has a capacity to produce 470 kg biochar per day in continuous operating mode was designed, manufactured and tested. This findings support the potential to prepare biochar from flower waste by slow pyrolysis processes.en_US
dc.identifier.urihttp://etd.aau.edu.et/handle/12345678/15935
dc.publisherAddis Ababa Universityen_US
dc.subjectSlow pyrolysisen_US
dc.subjectBiocharen_US
dc.subjectscrew reactorsen_US
dc.titleSimulation and Experimental Continuous Biochar Production from Flower Wasteen_US
dc.typeThesisen_US

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