EFFECT OF OPERATING CONDITIONS ON THE DEHYDRATION OF TOLUENE BY PERVAPORATION USING A POLYVINYL ALCOHOL MEMBRANE

Document Type: Research Paper

Authors

1 Chemical Science and Technology Research Division, Research Institute of Petroleum Industry (RIPI), P.O. Box 14665-1998, Tehran, Iran

2 Gas Research Division, Research Institute of Petroleum Industry (RIPI), P.O. Box 14665-1998, Tehran, Iran

Abstract

The effects of operating parameters such as feed temperature and permeate-side pressure on the performance of a commercial PVA membrane in the dehydration of toluene by a pervaporation (PV) membrane system is studied in the present work. The results obtained indicate that increasing temperature in the range of 40 to 70 °C and reducing permeate pressure in the range of 1 to 10 mmHg increase membrane flux and selectivity, which consequently leads to the considerable modification of membrane performance in the reduction of water content of the feed.

Keywords


[1] Joshi S., Fair J. R., “Adsorptive Drying of Toluene”, Ind. Eng. Chem. Res. 1988, 27, 2078-2085.

[2] Rachipudi P. S., Kariduraganavar M. Y., Kittur A. A., “Synthesis and Characterization of Sulfonated-polyvinyl alcohol Membranes for Pervaporation Dehydration of Isopropanol”, J. Membr. Sci, 2011, 383, 224-234.

[3] Jiang L. Y., Chung T. S., “Homogeneous Polyimide/ Cyclodextrin Composite Mem-branes for Pervaporation Dehydration of Isopropanol”, J. Membr. Sci. 2010, 346, 45-58.

[4] Tang Y., Widjojo N., Shi G. M., Chung T. S., “Development of Flat-sheet Membranes for C1–C4 Alcohols Dehydration Via Pervapora-tion from Sulfonated Polyphenylsulfone (sPPSU)”, J. Membr. Sci, 2012, 415-416, 686-695.

[5] Lieu Le N., Wang Y., Chung T. S., “Synthesis, Cross-linking Modifications of 6FDA-NDA/DABA Polyimide Membranes for Ethanol Dehydration Via Pervaporation”, J. Membr. Sci, 2012, 415-416, 109-121.

[6] Bolto B., Hoang M., Xie Z., “A Review of Membrane Selection for the Dehydration of Aqueous Ethanol by Pervaporation”, J. Membr. Sci, 2011, 503, 227-235.

[7] Hyder M. N., Huang R. Y. M., Chen P., “Pervaporation Dehydration of Alcohol–water Mixtures: Optimization for Permeate Flux and Selectivity by Central Composite Rotatable Design” J. Membr. Sci, 2009, 326, 343-353.

[8] Chapman P. D., Tan X., Livingston A. G., “Dehydration of Tetrahydrofuran by per-vaporation Using a Composite Membrane” J. Membr. Sci, 2006, 268, 13-19.

[9] Singha N. R., Parya T. K., Ray S. K., “Dehydration of 1,4-dioxane by Pervaporation Using Filled and Crosslinked Polyvinyl Alcohol Membrane” J. Membr. Sci. 2009, 340, 35-44.

[10] Neel J., “Introduction to Pervaporation” in: Huang R. Y. M. (Ed.), “Pervaporation Membrane Separation Processes”, 1991, 36-37.

[11] Devi D. A., Smitha B., Sridhar S., Aminabhavi T. M., “Pervaporation Separation of Dimethylformamide/ Water Mixtures Through Polyvinyl alcohol/ Poly(acrylic acid) Blend Membranes” Sep. Purif. Technol. 2006, 51, 104-111.

[12] Li J., Chen C., Han B., Peng Y., “Laboratory and Pilot-scale Study on Dehydration of Benzene by Pervaporation” J. Membr. Sci. 2002, 203, 127-136.

[13] Lin L., Kong Y., Yang J., “Scale-up of Pervaporation for Gasoline Desulphuriza-tion, Part 1, Simulation and Design” J. Membr. Sci. 2007, 298, 1-13.

[14] Nawawi M. G., Huang R. Y. M., “Pervapora-tion Dehydration of Isopropanol with Chitosan Membranes” J. Membr. Sci. 1997, 124, 53-62.

[15] Cabasso I., Grodzinski J. J., Vofsi D., “Polymeric alloys of Polyphosphonates and Acetyl Cellulose: Sorption and Diffusion of Benzene and Cyclohexane”, J. Appl. Polym. Sci. 1974, 18, 2117-2136.

[16] Shao P., Huang R. Y. M., “Polymeric Membrane Pervaporation” J. Membr. Sci. 2007, 287, 162-179.