Title:
Tar Reforming over CAO and Straw Char Produced Inherently in Steam-oxygen Biomass Gasification Processes Using Toluene as Model Component
Author(s):
Chen, Y-H., Schmid, M., Waizmann, G., Hafner, S., Scheffknecht, G.
Document(s):
Paper
Abstract:
This study focuses on tar reforming over cost-effective catalytically active materials, CaO and straw char, which are produced in-situ in gasification processes. They were tested in a lab-scale fixed bed reactor at high temperature and different steam volume fractions (VH2O) with toluene as a relevant model tar component. In the experiments, both CaO and straw char showed significant catalytic activity for tar reforming. Toluene conversion (XT) over CaO and straw char at 900 °C is 0.43 and 0.21, which are promising results considering low residence time in the lab scale facility. The toluene reforming over straw char tends to produce light gas components like CO and CO2 while that over CaO majorly forms benzene. Via the first order kinetic model, the calculated apparent pre-exponential factor (k0) and activation energy (Ea) of straw char and CaO in this study are 8.7×105 m3 kg-1 h-1 and 78.2 kJ mol-1 as well as 6.1×104 m3 kg-1 h-1 and 57.3 kJ mol-1, respectively. In conclusion, this research proves that these in-situ produced catalysts from the gasification are applicable for catalytic tar reforming.
Keywords:
biomass gasification, catalyst, tar reforming
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Gasification for synthesis gas production
Event:
27th European Biomass Conference and Exhibition
Session:
2BO.14.2
Pages:
559 - 564
ISBN:
978-88-89407-19-6
Paper DOI:
10.5071/27thEUBCE2019-2BO.14.2
Price:
FREE
