Effective Removal Pcdd/Fs and Other Pops from Municipal Solid Waste Incinerator Fly Ash via Catalytic Pyrolysis(2/3)

Project Details

Description

The amount of bottom ash (BA) and fly ash (FA) released from all municipal solid waste incinerators (MSWIs) in Taiwan is between 1,200,000 to 1,300,000 tons/year. FA is classified as hazardous waste because it contains high concentrations of chloride, heavy metals and organic pollutants (PCDD/Fs, dl-PCBs, PCN and PAHs). To attain the target of “zero waste policy” enacted by Taiwan EPA, recycle of FA from MWIs should be conducted. Previous studies indicate that 95% of PCDD/Fs in fly ash can be removed at 350oC under oxygen-deficit condition. However, formation of other organic pollutants is observed in the exhaust gas of the pyrolysis system. In this study, FA will be pre-washed to reduce chloride content before being treated with catalytic pyrolysis and PCDD/Fs, dl-PCBs, PCN and PAHs concentrations in fly ash and exhaust gas will be determined. Moreover, different palladium (Pd)-based catalysts will be added to the pyrolysis process in in-situ and ex-situ system at a temperature lower than 350oC to enhance the PCDD/Fs destruction efficiency and reduce the formation of organic pollutants formation in the exhaust gas. The mechanisms for removing PCDD/Fs in the catalytic pyrolysis treatment system are complicated. Therefore, this study is expected to propose appropriate
StatusFinished
Effective start/end date1/08/2031/07/21

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 11 - Sustainable Cities and Communities
  • SDG 12 - Responsible Consumption and Production
  • SDG 17 - Partnerships for the Goals

Keywords

  • fly ash
  • dioxin
  • chloride content
  • catalytic pyrolysis.

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