Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: AGİEB ELNAZİR AGİEB HAMMAD
Supervisor: ÖZKAN MURAT DOĞAN
Abstract:Despite the importance of fossil fuels, which is an important energy source on the present time, the researches are continuing to find more efficient, clean and economic solutions to meet the increasing energy needs due to the environmental problems. Within the framework of these studies, biomass was found to be one of the most important energy sources that can act as an alternative to fossil fuels, because of its less polluting effects and renewability. Biomass can be transformed into a wide variety of energy sources with a wide variety of thermal, biological and physical technologies, and gasification technology are among the important technologies to use. With the biomass gasification process, it is also possible to produce valuable chemicals such as hydrogen, ammonia, and methanol as side products. The aim of this study to produce hydrogen-rich syngas production by the gasification process of olive pomace, hazelnut shell and sawdust as biomass residue. A fixed bed in indirectly heated gasification reactor with a diameter of 40 mm and a height of 1 m system was used during the experimental work. The temperature required for gasification was adjusted with a furnace and the water vapor used as gasification agent is also provided by steam generator. First grinding the olive pomace, hazelnut shell and wood sawdust which will be used as biomass waste, then quartz and elemental analyses were carried out. The olive pomace, hazelnut shell and wood sawdust pieces with an average of 1 mm diameter under various temperatures (600oC, 650oC, 700oC, 750oC, 800oC and 850oC), varying steam flow (5, 10 and 15 g water/min) and different catalysts (MgO, CaO, K2CO3) during gasification process. The effects of the gasification temperature, water vapor flow rate and catalysts on the syngas composition were investigated. The syngas composition was analyzed in gas chromatography equipment and the percentages in the mixture were determined. During the experimental studies, the highest hydrogen concentration of 66% was obtained while using the olive pomace as biomass residue the highest at 750 oC and under 15 g water/min steam flow rate conditions. The highest H2/CO ratio was recorded as 5.4 during the experiment with olive pomace waste