Title:
Pyrolysis and In-Line Reforming of Biomass: Effect of Catalyst Deactivation on Hydrogen Production
Author(s):
Arregi, A., Lopez, G., Amutio, M., Artetxe, M., Alvarez, J., Barbarias, I., Santamaria, L., Olazar, M.
Document(s):
Paper
Poster
Abstract:
The pyrolysis and in-line catalytic steam reforming of biomass has been carried out in a conical spouted bed reactor at 500 ºC and fluidized bed reactor at 600 ºC, respectively. Although high conversion (99.7 %) and H2 yield (93.5 %) are obtained at zero time on stream, catalyst activity decreases considerably with time on stream, especially above 75 min, obtaining a conversion and H2 yield of around 60 and 46 % after 105 min, respectively. Concerning, CH4, C2-C4 hydrocarbons and non-converted bio-oil yields, they increase as catalyst is deactivating, due to secondary cracking reactions. The results of the temperature programmed oxidation (TPO) and electron microscopy images (SEM and TEM) analysis show that two different types of coke are deposited on the catalyst, an amorphous coke which is combusted at low temperatures and a more condensed coke which is located further from the Ni metallic sites. Thus, it has been seen that amorphous coke is the main deactivating coke type, which is specially produced in reforming of oxygenated compounds.
Keywords:
biomass, flash pyrolysis, hydrogen, fluidized bed, reforming
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Pyrolysis and other biomass liquefaction technologies
Event:
25th European Biomass Conference and Exhibition
Session:
3AV.3.19
Pages:
1153 - 1157
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-3AV.3.19
Price:
FREE
