Kinetic modeling of ex-situ biomass catalytic pyrolysis

D. Ipsakis, E. Heracleous, K. Gkinis, S. D. Stefanidis, K. G. Kalogiannis, A. A. Lappas*

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

Core objective of this study is the development and evaluation of a kinetic modeling strategy that is able to predict product yields (based on reaction lumps) during the ex-situ biomass catalytic pyrolysis. A series of experiments was initially performed in two interconnected reactors (thermal pyrolysis and catalytic upgrading) at the pilot-scale unit of the Laboratory of Environmental Fuels & Hydrocarbons in CPERI/CERTH. Specifically, the investigation of the effect of catalyst/biomass ratio and time-on-stream provided the required data towards estimating the main kinetic parameters of both thermal pyrolysis and catalytic upgrading steps. Both kinetic schemes feature a 1 st order dependence on biomass (thermal) and organic/bio-oil (catalytic) reactant mass fraction, respectively. Catalyst deactivation was evaluated via a time-dependent empirical function that was applied at each individual lump (CO, CO 2 , H 2 O, organics/bio-oil and coke). Overall, it was identified that the applied kinetic model predicts accurately a) the reduction in the oxygen content of bio-oil with increased residence times (increase of the catalyst weight) and b) the increased coke formation with time-on-stream that deactivates the catalyst and deteriorates bio-oil quality (decrease of CO, H 2 O mass yields and consequent increase of oxygen content in the final product)

Original languageEnglish
Pages (from-to)27362-27368
Number of pages7
JournalMaterials Today: Proceedings
Volume5
Issue number14
Early online date12 Dec 2018
DOIs
Publication statusPublished - 31 Dec 2018
Event11th Panhellenic Scientific Conference on Chemical Engineering, PSCCE 2017 - Thessaloniki, Greece
Duration: 25 May 201727 May 2017

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Ipsakis, D., Heracleous, E., Gkinis, K., Stefanidis, S. D., Kalogiannis, K. G., & Lappas, A. A. (2018). Kinetic modeling of ex-situ biomass catalytic pyrolysis. Materials Today: Proceedings, 5(14), 27362-27368. https://doi.org/10.1016/j.matpr.2018.09.052