Title:
Upgrading of Synthesis Gas From Biomass Gasification by Reforming of Recycled Methane
Author(s):
Kertthong, T., Chen, Y.-H., Beirow, M., Schmid, M., Scheffknecht, G.
Document(s):
Paper
Abstract:
Due to the low gasification temperature in the sorption enhanced gasification of biomass, a syngas with a relatively high methane content is produced. This methane is an inert material for downstream fuel synthesis, such as methanol, dimethyl ether, and Fischer-Tropsch liquids. This work focuses on the utilization of methane exiting the fuel synthesis to enhance the overall conversion efficiency from biomass to fuel. Two reforming methods, namely non-catalytic partial oxidation and catalytic steam reforming, with the purpose of maximizing CH4 conversion as well as selectivity for H2 and CO, were investigated and successfully performed in two different in-housed developed reactors. The study of non-catalytic partial oxidation of methane and methane-steam mixtures found that CH4 conversion was strongly influenced by the oxygen to methane ratio. Higher oxygen to methane ratio provided a higher conversion. The desired composition of the gas (H2/CO ratio) can be obtained by adjusting steam addition. Experiments on the catalytic activity of CaO for the steam reforming of methane revealed that CaO had a positive effect on CH4 conversion. The conversion increased with increasing temperature. The research findings suggest that both reforming approaches have potential as a reforming unit and thus the fuel synthesis can be improved.
Keywords:
biomass gasification, steam reforming, gas upgrading, partial oxidation
Topic:
Biomass Technologies and Conversion for Bioenergy
Subtopic:
Gasification for synthesis gas production
Event:
28th European Biomass Conference and Exhibition
Session:
2BO.14.4
Pages:
306 - 310
ISBN:
978-88-89407-20-2
Paper DOI:
10.5071/28thEUBCE2020-2BO.14.4
Price:
FREE
