Simultaneous Reaction-Separation in a Microchannel Reactor with the Aid of a Guideline Structure

Authors: Salah Aljbour, Hiroshi Yamada, Tomohiko Tagawa

Abstract:

A microchannel with two inlets and two outlets was tested as a potential reactor to carry out two-phase catalytic phase transfer reaction with phase separation at the exit of the microchannel. The catalytic phase transfer reaction between benzyl chloride and sodium sulfide was chosen as a model reaction. The effect of operational time on the conversion was studied. By utilizing a multiphase parallel flow inside the microchannel reactor with the aid of a guideline structure, the catalytic phase reaction followed by phase separation could be ensured. The organic phase could be separated completely from one exit and part of the aqueous phase was separated purely and could be reused with slightly affecting the catalytic phase transfer reaction.

Keywords: Green engineering, microchannel reactor, multiphase reaction, process intensification.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333909

References:

[1] A.I. Stankiewicz, and J.A Moulijn, "Process Intensification: Transforming Chemical Engineering," Chem. Eng. Prog., vol. 96, pp. 22-34, Jan. 2000.
[2] S. Becht, R. Franke, A. Geibelmann, and H. Hahn, "An industrial view of process intensification," Chem. Eng. and Processing, vol.48, pp. 329-332, 2009.
[3] M.M. Sharma, "Strategies of conducting reactions on a small scale. Selectivity Engineering and process Intensification, "Pure Appl. Chem., vol. 74, no. 12, pp. 2265-2269, 2002.
[4] J-C. Charpentier, "Process intensification by miniaturization," Chem. Eng. Technol. vol. 28, no. 3, pp. 255-258, 2005.
[5] W. Ehrfeld, V. Hessel and H. Lowe, Microreactors: New Technology for Modern Chemistry, Wiley-VCH, Weinheim, 2000.
[6] C. N. Baroud, and H. Willaime., "Multiphase Flows in Microfluidics," C.R. Physique, vol. 5, pp. 547-555, 2004.
[7] S. Aljbour, T. Tagawa, M. Matouq and H. Yamada, "Surfactant-assisted two phase flow for a reaction separation system in Microchannel Reactor," Front. Chem. Eng. China, vol. 3, no. 1, pp. 33-38, 2009.
[8] T. Tagawa, S. Aljbour, M. Matouq, and H. Yamada, "Micro-channel reactor with guideline structure for organic aqueous binary system," Chem. Eng. Sci., vol. 62, pp. 5123-5126, 2007.
[9] V. Reddy, and J. D. Zahn, "Interfacial Stabilization of Organic-Aqueous Two-phase microflows for a miniaturized DNA extraction". J. of Colloid and interface Science, vol. 286, pp. 158-165, 2005.
[10] J.R. Burns, and C. Ramshaw; "The intensification of rapid reactions in multiphase systems using slug flow in capillaries," Lap on a Chip, vol.1, pp. 10-15, 2001.