Paper details

Title:

Hydrogen and Syngas Production from Pyrolysis-Gasification of RDF and Wood Pellets in a Continuous Screw Kiln Reactor

Author(s):

Williams, P.T., Efica, C., Blanco Sanchez, P., Myers, L., Wu, C., Onwudili, J.A.

Document(s):

Abstract:

The gasification of wastes and biomass is regarded as a viable thermal treatment process to produce syngas composed largely of hydrogen, methane, carbon monoxide and carbon dioxide. However, the process of gasification could be improved if the residual tar could be converted to hydrogen and methane gas and the carbon dioxide could be adsorbed via carbon capture within the process. Thereby the gases would have a much higher calorific value. In this work, a two stage reactor has been used to investigate the catalytic steam pyrolysis­gasification of refuse derived fuel (RDF) derived from municipal solid waste. The first stage involves the pyrolysis of the RDF at 500 °C. The pyrolysis gases are then passed directly to the second stage where gasification of the evolved pyrolysis gases takes place at 800 °C in the presence of steam and a catalyst. A novel Ni­SiO2 catalyst was used to convert the tar from pyrolysis into methane and hydrogen. The gases from pyrolysis­gasification were analysed off­line using packed column gas chromatography for hydrogen, methane, carbon monoxide, carbon dioxide and C1­C4 hydrocarbons. BET surface area and porosity, X­ray diffraction (XRD), and Transmission electron microscopy (TEM) were used to characterize the prepared catalysts. The results showed that the prepared catalysts had a high surface area and contained well­dispersed nickel oxide particles. The presence of the Ni­SiO2 catalysts resulted in a marked increase in hydrogen production from the refuse derived fuel.

Keywords:

catalyst, gasification, syngas, waste

Topic:

Biomass Conversion Technologies for Heating, Electricity and Chemicals                  

Subtopic:

CO2 issues and special fuels for gasification to syngas

Event:

19th European Biomass Conference and Exhibition

Session:

OB5.4

Pages:

1134 - 1136

ISBN-13:

978-88-89407-55-4

ISBN-10:

88-89407-55-7

Paper DOI:

10.5071/19thEUBCE2011-OB5.4

Price:

FREE