Hydrodynamic performance in mesoporous silica membrane for lactic acid and esterifiecation.

Okon, Edidiong; Shehu, Habiba; Kajama, Mohammed; Orimoloye, Adesola; Nwogu, Ngozi Claribelle; Orakwe, Ifeyinwa; Gobina, Edward

Abstract

Ethyl Lactate has a lot of applications in different industries including food, pharmaceutical and agricultural processes. The esterification process of lactic acid and ethanol is a highly equilibrium-controlled reaction. The selective removal of one of the reaction products can be improved using membrane. In this work, the hydrodynamic performance of silica membrane with single carrier gases was analysed to determine the flow mechanism of the gases at the gauge pressure range of 0.01 to 1.00 bar and a temperature of 140 C. The results showed that the gas flux increases with increase in gauge pressure indicating Knudsen mechanism of gas transport. The R2 value for the four gases used (CO2, He, Ar and N2) were in the range of 0.98-1.00. The gas permeance was found to decrease with respect to the gauge pressure in the order N2 > Ar > He > CO2 confirming non-Knudsen mechanism of gas transport. Gases with higher kinetic diameter showed a higher permeance indicating a non-molecular sieving mechanism of gas transport. The gas permeance with respect to viscosity indicates viscous mechanism of gas transport. The decreasing order of the gas viscosity with respect to gas permeance was CO2 < He < Ar < N2.

Citation

OKON, E.P., SHEHU, H., KAJAMA, M.N, ORIMOLOYE, A.O., NWOGU, N.C., ORAKWE, I.R. and GOBINA, E. 2015. Hydrodynamic performance in mesoporous silica membrane for lactic acid and esterifiecation. In Ao, S.I., Gelman, L., Hukins, D.W.L., Hunter, A. and Korsunsky, A.M. (eds.) Proceedings of the 2015 World congress on engineering (WCE 2015), 1-3 July 2015, London, UK. Lecture notes in engineering and computer science, 2218. Hong Kong: Newswood Limited [online], pages 781-784. Available from: http://www.iaeng.org/publication/WCE2015/WCE2015_pp781-784.pdf

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 2015 World congress on engineering (WCE 2015)
• Start Date: Jul 1, 2015
• End Date: Jul 3, 2015
• Acceptance Date: Jul 1, 2015
• Online Publication Date: Jul 1, 2015
• Publication Date: Jul 3, 2019
• Deposit Date: Oct 6, 2016
• Publicly Available Date: Oct 6, 2016
• Print ISSN: 2078-0958
• Electronic ISSN: 2078-0966
• Publisher: Newswood Academic Publishing
• Peer Reviewed: Peer Reviewed
• Pages: 781-784
• Series Title: Lecture notes in engineering and computer science
• Series Number: 2218
• Series ISSN: 2078-0966
• ISBN: 9789881404701
• Keywords: Esterification; Ethyl lactate; Gas permeation; Lactic acid; Transport mechanism
• Public URL: http://hdl.handle.net/10059/1862
• Publisher URL: http://www.iaeng.org/publication/WCE2015/WCE2015_pp781-784.pdf
• Contract Date: Oct 6, 2016