UDDIN, Mohammad S.

Associate Professorial Fellow

PhD (Chem. Eng.) UMIST, 1980
MSc (Chem. Eng.) UMIST, 1976
BSc (Chem. Eng.) BUET, 1970

Contact information
Blk E5, 4 Engineering Drive 4, #02-37, Singapore 117576
Tel: (65) 6516 2886    Fax: (65) 6779 1936
Email: cheshahb@nus.edu.sg

RESEARCH

Separation Processes (in collaboration with A/P K. Hidajat)

Liquid Membrane Separation

Liquid membrane technique uses facilitated transport mechanism for purification and concentration of solutes. Current research in this area includes the extraction of metals especially noble and heavy metals and rare earths from industrial effluent and the modelling of the process. Present work also includes use of new type of surfactant, known as bi-functional surfactant. Integration of emulsion liquid membrane, reverse micelle and affinity separation is underway. Such integration is expected to provide high selectivity and purification and concentration at the same time for bio-products.

Ferrofluid Separation

Ferrofluid separation is a recent concept of using small nano-meter sized ferromagnetic colloidal particles as separation agents. The particles are stabilised by layer(s) of polymeric surfactants to modify its surface characteristics for any specific separation. The main focus of the present study is to develop an appropriate counter-current separation process using magnetic fluid.

Drying in Food Processing and Preservation (in collaboration with A/P M. N. A. Hawlader, Dept. of Mechanical Engineering).

Drying is considered to be one of the most cost-effective methods to prolong the shelf life of perishable food materials. Various properties such as water diffusivity, sorption isotherm, water activity are important parameters in relation to drying and storage. Present work involves experimental determination and model prediction of such parameters under the influence of different conditions (temperature, humidity, velocity) of the drying media.

Microencapsulation (in collaboration with A/P M. N. A. Hawlader, Dept. of Mechanical Engineering).

Microencapsulated phase change materials (PCM) may be used as indirect mode of thermal storage. Due to large heat transfer area, it is expected to be more effective compared to traditional PCM storage system. Present study focuses on preparation, characterisation and cyclic heat storage and release tests of the microcapsules, and simulation of charge and discharge processes of PCM microcapsules.

SELECTED PUBLICATIONS

M. S. Uddin, M. N. A. Hawlader and H. J. Zhu, "Microencapsulation of Ascorbic Acid: Effect of Process Variable on Product Characteristics", Journal of Microencapsulation, 18(2), 199 (2001).

M. S. Uddin, M. N. A. Hawlader and L. Zhou, "Kinetics of Ascorbic Acid Degradation in Dried Kiwifruits During Storage", Drying Technology, 19(2), 437 (2001).

M. S. Uddin and M. Kathiresan, "Extraction of Metal Ions by Emulsion Liquid Membrane Using Bi-functional Surfactant: Equilibrium and Kinetic Studies", Proceedings of the 8th APCChE Congress, Seoul, Korea, 239 (1999).

M. S. Uddin, K. Hidajat and F. C. Woo, "Extraction of Gold from Aqueous Solution by Carrier-Mediated Process using Kryptofix 22 DD", Journal of Chemical Technology and Biotechnology, 58, 123 (1993).

M. S. Uddin, K. Hidajat, B. G. Lim and C. B. Ching, "Interfacial Mass Transfer in Stripping of Phenylalanine in a Liquid-Liquid Extraction Process", Journal of Chemical Technology and Biotechnology, 53, 353 (1992).