TY - JOUR
T1 - Product sampling during transient continuous countercurrent hydrolysis of canola oil and development of a kinetic model
AU - Wang, Weicheng
AU - Natelson, Robert H.
AU - Stikeleather, Larry F.
AU - Roberts, William L.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This material is based upon work supported by the National Science Foundation EFRI program under Grant EFRI-093772.
PY - 2013/11
Y1 - 2013/11
N2 - A chemical kinetic model has been developed for the transient stage of the continuous countercurrent hydrolysis of triglycerides to free fatty acids and glycerol. Departure functions and group contribution methods were applied to determine the equilibrium constants of the four reversible reactions in the kinetic model. Continuous countercurrent hydrolysis of canola oil in subcritical water was conducted experimentally in a lab-scale reactor over a range of temperatures and the concentrations of all neutral components were quantified. Several of the rate constants in the model were obtained by modeling this experimental data, with the remaining determined from calculated equilibrium constants. Some reactions not included in the present, or previous, hydrolysis modeling efforts were identified from glycerolysis kinetic studies and may explain the slight discrepancy between model and experiment. The rate constants determined in this paper indicate that diglycerides in the feedstock accelerate the transition from "emulsive hydrolysis" to "rapid hydrolysis". © 2013 Elsevier Ltd.
AB - A chemical kinetic model has been developed for the transient stage of the continuous countercurrent hydrolysis of triglycerides to free fatty acids and glycerol. Departure functions and group contribution methods were applied to determine the equilibrium constants of the four reversible reactions in the kinetic model. Continuous countercurrent hydrolysis of canola oil in subcritical water was conducted experimentally in a lab-scale reactor over a range of temperatures and the concentrations of all neutral components were quantified. Several of the rate constants in the model were obtained by modeling this experimental data, with the remaining determined from calculated equilibrium constants. Some reactions not included in the present, or previous, hydrolysis modeling efforts were identified from glycerolysis kinetic studies and may explain the slight discrepancy between model and experiment. The rate constants determined in this paper indicate that diglycerides in the feedstock accelerate the transition from "emulsive hydrolysis" to "rapid hydrolysis". © 2013 Elsevier Ltd.
UR - http://hdl.handle.net/10754/563056
UR - https://linkinghub.elsevier.com/retrieve/pii/S0098135413001968
UR - http://www.scopus.com/inward/record.url?scp=84881095612&partnerID=8YFLogxK
U2 - 10.1016/j.compchemeng.2013.06.003
DO - 10.1016/j.compchemeng.2013.06.003
M3 - Article
SN - 0098-1354
VL - 58
SP - 144
EP - 155
JO - Computers & Chemical Engineering
JF - Computers & Chemical Engineering
ER -