Kinetic Modeling of Transesterification of Triacetin Using Synthesized Ion Exchange Resin (SIERs)

Authors: Hafizuddin W. Yussof, Syamsutajri S. Bahri, Adam P. Harvey

Abstract:

Strong anion exchange resins with QN+OH-, have the potential to be developed and employed as heterogeneous catalyst for transesterification, as they are chemically stable to leaching of the functional group. Nine different SIERs (SIER1-9) with QN+OH-were prepared by suspension polymerization of vinylbenzyl chloridedivinylbenzene (VBC-DVB) copolymers in the presence of n-heptane (pore-forming agent). The amine group was successfully grafted into the polymeric resin beads through functionalization with trimethylamine. These SIERs are then used as a catalyst for the transesterification of triacetin with methanol. A set of differential equations that represents the Langmuir-Hinshelwood-Hougen- Watson (LHHW) and Eley-Rideal (ER) models for the transesterification reaction were developed. These kinetic models of LHHW and ER were fitted to the experimental data. Overall, the synthesized ion exchange resin-catalyzed reaction were welldescribed by the Eley-Rideal model compared to LHHW models, with sum of square error (SSE) of 0.742 and 0.996, respectively.

Keywords: Anion exchange resin, Eley-Rideal, Langmuir-Hinshelwood-Hougen-Watson, transesterification.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1098009

References:

[1] Y. Liu, E. Lotero, J. G. Goodwin Jr., & C. Lu. “Transesterification of triacetin using solid Bronsted bases,” Journal of Catalysis, 2007, 246, 428-433.
[2] N. Shibasaki-Kitakawa, H. Honda, H. Kuribayashi, T. Toda, T. Fukumura, & T. Yonemoto. “Biodiesel production using anionic ion-exchange resin as heterogeneous catalyst,” Bioresource Technology, 2007, 98, 416-421.
[3] H. Hattori, M. Shima, & H. Kabashima. “Alcoholysis of ester and epoxide catalysed by solid bases,” Studies in surface science and catalysis, 2000, 130 D, 3507-3512.
[4] Dossin, T.F., Reyniers, M.F. & Marin, G.B. “Kinetics of heterogeneously MgO-catalyzed transesterification,” Applied Catalysis B: Environmental, 2006, 62(1-2): 35-45.
[5] Hayes, R. E. Introduction to Chemical Reactor Analysis. CRC Press, 2001.
[6] Schwarzer, R.. “Esterification of acetic acid with methanol: a kinetic study with Amberlyst 15,” 2006, M. Eng. Thesis, University of Pretoria, South Africa.
[7] Macleod, C. S. “Evaluation of heterogeneous catalysts for biodiesel production,” 2008, PhD Thesis, Newcastle University, UK.
[8] Eley, D. D. &Rideal, E. K. “Parahydrogen conversion on Tungsten,” Nature, 1940, 146, 401-402.