TY - JOUR
T1 - Kinetic modeling of ex-situ biomass catalytic pyrolysis
AU - Ipsakis, D.
AU - Heracleous, E.
AU - Gkinis, K.
AU - Stefanidis, S. D.
AU - Kalogiannis, K. G.
AU - Lappas, A. A.
PY - 2018/12/31
Y1 - 2018/12/31
N2 -
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)
AB -
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)
UR - http://www.scopus.com/inward/record.url?scp=85065177809&partnerID=8YFLogxK
UR - https://www.sciencedirect.com/science/article/pii/S2214785318322521?via%3Dihub
U2 - 10.1016/j.matpr.2018.09.052
DO - 10.1016/j.matpr.2018.09.052
M3 - Conference article
AN - SCOPUS:85065177809
SN - 2214-7853
VL - 5
SP - 27362
EP - 27368
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
IS - 14
T2 - 11th Panhellenic Scientific Conference on Chemical Engineering, PSCCE 2017
Y2 - 25 May 2017 through 27 May 2017
ER -