Document Type : Research Article
Authors
1
Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
2
Department of Mechanical Engineering, Faculty of Mechanics, Electricity and Computer, Islamic Azad University, Science and Research Branch,, Tehran, Iran
3
Department of Mechanical engineering, Islamic Azad University, Central Tehran Branch, Tehran, Iran
4
Plasma Physics research Center, Science and Research Branch, Azad Islamic University, Tehran, Iran
Abstract
The gasification process of hospital waste, unlike traditional methods such as sterilization and burying of waste and conventional burning, has the ability to use the resulting synthetic gas to produce power and electricity in addition to satisfying environmental standards. In this article, the biomedical wastes of Farhikhtegan Hospital in Tehran were gasified with a melting-plasma gasifier reactor that has a 90 kW torch. The gasification process was carried out at different temperatures for the gasifier reactor, and the resulting syngas was analyzed elementally, and the percentage of gas forming gases included; CO, H2, CO2 and CH4 were determined. At a temperature of 1400 ℃, the amount of CO and H2 was measured as 37.1% and 32%, respectively, and at this temperature, the high heat value of the gas synthesis mixture was obtained as 9.24 MJ/kg. Also, pollutants such as H2S, NO2 and SO2 were observed in a very small amount in gas synthesis. In the second phase of this research, the thermodynamic equilibrium modeling of the gasification process of this waste was investigated with Aspen Plus software in the temperature range of 1000 to 1800 ℃. All sub-processes of gasification including drying, pyrolysis, partial combustion and reforming are modeled in equilibrium with the modules in the software. The results of this gasification modeling were in very good agreement with the experimental results.
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