Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: ABDALLA ABDALRAZIG ABDALLA HUSSEIN
Supervisor: ÖZKAN MURAT DOĞAN
Abstract:Although fossil fuels (oil and natural gas), which are the current energy sources, are of indispensable importance, these energy sources will not continue in the near future. Considering this situation, studies on other energy sources and ways of obtaining energy continue. In particular, research on access to energy using biomass and solid fuel wastes has increased recently. In this research, synthesis gas and gas production from gasification came into prominence. It is also possible to produce valuable chemicals (such as hydrogen, ammonia, and methanol) from the synthesis gas produced by gasification. In this study, the gasification process was carried out with carbon dioxide in the pomace, hazelnut shell and sawdust as biomass waste. Gasification was carried out in a fixed bed quartz glass reactor with a diameter of 40 mm and a height of 1 m. The temperature required for gasification is provided by means of an oven and carbon dioxide by means of a tube. Pomace, hazelnut shell and sawdust with average particle diameter of 1-1.25 mm, at different temperatures (600 oC, 650 oC, 700 oC, 750 oC, 800 oC and 850 oC) and at different carbon dioxide flow rates (1.5, 3 and 4.5 ml/sec) gasification process. In addition, the best synthesis gas concentration results obtained from gasified biomass (pomace, hazelnut shell and sawdust) and used carbon dioxide rates (1.5, 3, 4.5 ml/sec) were investigated with catalysts (CaO, MgO and K2CO3). The effects of temperature and carbon dioxide flow rate on synthesis gas composition formed by catalyst gasification were investigated. In the experimental studies, the best H2 and CO yield in the gas mixture in the catalyst-free study were found to be hazelnut shell at 800oC temperature and 1,5 ml/sec CO2 flow rate. The highest value in terms of H2 concentration was reached 33.63%. In the catalytic studies, CaO was the best additive. When hazelnut shell and CaO was used as an additive in terms of H2 concentration, it was found to be the highest. At 600 oC, H2 yield was 52.9% by volume and H2/CO was 3.31.