Gasification of Municipal Solid Waste Materials and Production of Automotive Fuels

Sahraei F., School of Engineering, University of Boras, Sweden

Thermo-chemical processing of waste materials including gasification is considered as an effective waste treatment method in modern communities. Through these processes, greenhouse gases are significantly reduced alongside the emergence of value added products (renewable fuels), which can be improved to lower the energy demand in different sectors of our society. In parallel to the production of renewable fuel, sustainable development targets are met. In this report, gasification of municipal solid waste materials and production of automotive fuels was studied.

Syngas is a gasification product, which is made up of carbon monoxide, hydrogen and methane. Syngas can be used for production of power, automotive fuel, and chemicals. The production of transport fuel using gasification is considered as a sustainable alternative for petroleum based fuel, which can improve the domestic support of energy for the independent countries.

In the gasification process, the energy content in carbonaceous material like municipal solid waste materials is converted into a gas phase fuel. The conversion is affected by several parameters such as gasification agent, reactor design, operating temperature and pressure of gasifier, heating method, moisture content and particle size of feedstock. Among them the gasification agent and gasifier temperature, respectively, have showed significant impact on gasification performance, product gas yields, chemical composition and heating value of product gas.

The kinetic mechanism of the gasification reaction has been applied in order to design the gasifier and to predict the operational behavior to achieve optimal conditions of the gasification process. Also, for the waste particles gasification modeling the shrinking unreacted particle model (SUMP) has been selected.

The findings of the study indicate that the designed parameters like steam and circulation sand flow rate at optimum gasifier temperature and volume of bed reactor are calculated. In addition, the relation between residence time and size of the particles fed to the gasifier, reaction temperature is achieved. Furthermore, the waste gasifier would be indirect-heated, atmospheric pressure, bubbling fluidized bed, steam gasifier, which can be joined to the bubbling fluidized bed waste boiler. This combination has the potential to increase the overall efficiency up to double compared to conventional waste incineration.

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Сведения об авторах

Sahraei Farokh, Master Student of Sustainable Technology in Resource Recovery, School of Engineering, University of Boras, Alidebergsgatn 18C, SE 50631, Boras, Sweden. Tel. (70) 023-92-11. E-mail