engleski

Production of hydrogen-rich synthesis gas by gasification of waste materials in a rotary kiln reactor

The problem of today is the increasing disposal of waste materials and the increasing depletion of natural resources. Therefore, the European Commission is adapting further regulations on waste management to the principles of the circular economy. Gasification of waste materials has not yet been established as one of the methods of waste utilisation, but a considerable number of studies on the subject point to a number of advantages of this method while reducing greenhouse gas emissions. One waste whose disposal is a global problem is sewage sludge (SS). In addition to SS, plastic waste is also a major issue due to the growing problem of microplastic contamination. In this work, the following wastes were used for gasification: SS from the wastewater treatment plant (WWTP) Zagreb and mixed plastic wastes (MP) originating from one of the waste collectors on the territory of the Republic of Croatia. Gasification was carried out in a rotary reactor. SS was gasified at temperatures of 1100°C and MP at temperatures of 900°C. The syngas produced from SS has a lower heating value (LHV) of 6.1 MJm-3 and a volume fraction of H2 in the syngas of 22.94%, while the syngas produced from gasification of MP has a better LHV of 14.4 MJm-3 and a volume fraction of H2 of 48.56%.

Gasification, Sewage sludge, Mixed plastic waste, Syngas, Hydrogen

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