Ali Farsi

29 Aug 2012

Ali Farsi, Ph.D. Fellow of chemical engineering is member of separation group of Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, where he is a part of Reverse osmosis ceramic membrane project. This project has been funded by Danish National Advanced Technology Foundation. He is also Director of membrane reactor group of Shahid Bahonar University of Kerman, Iran as well as member of Iranian chemical engineering society.

Education and Research

2012-2015: PhD of Chemical Engineering, Aalborg University, Denmark

Thesis: Reverse Osmosis and Nanofiltration Ceramic Membrane Characterization: Experimental and Theoretical Study

2011-2012: Leader of R&D, Momtazan Cement Company Kerman, Iran, (The 5th Biggest Cement Producer In The Middle East)

Project: The Influence of Nano-particles on Performance of Portland Cement Paste and Mortar

2008-2011: M.Sc. of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

Thesis: Oxidative Coupling of Methane over Li/MgO Nanocatalyst

2010- 2011 Researcher Universiti Teknologi Malaysia (UTM) Johor Bahru, Malaysia

Projects: 1- A New Reactor Concept For Combining Oxidative Coupling and Steam Reforming of Methane

Research interests

Reverse Osmosis Ceramic Membrane, Nanofiltration, Membrane modeling, Fundamental Heterogeneous Catalysis, Catalyst and Nanocatalyst Synthesis and Production, Novel Chemical Reactor Modeling and Simulation, Reactions Kinetic Modeling, Natural Gas Conversion, Methane Coupling and Reforming, Nano-Cement.

PDF of presentation (part one)


PDF of presentation (part two)


Abstract



Reverse osmosis ceramic membrane: Interlayer preparation by polymer derived SiC dip-coating on silicon carbide supports

The aim of the present work is to make allyl-hydridopolycarbosilane (AHPCS) derived silicon carbide (SiC) interlayer on SiC support in order to prepare smaller pore size surface for top layer coating.  A suspension of 5% SiC powder with 200 nm average particle size in solution of 10% AHPCS in n-Hexane has been employed to make pre-ceramic layer by dip coating technique with 2 mm/s rate. Sintering process has been occurred in 750oC for two hours using a regulate temperature program in presence of argon with 3oC/min cool down rate. Four flat disc supports which were cleaned by different methods has been coated at the same conditions to compare with non-cleaned coated support so as to investigate the influence of support cleaning on interlayer performance.  In cleaning procedure, all the supports have been contacted with air in 450oC for 2 hours though they have been sonicated with acetone in various times and amounts and then they have been dried at 120oC overnight before sintering process. Concerning this method, a uniform lower crack surface layer has been produced compare to its SiC support. SEM analyzed has shown that the supports’ average pore sizes have been reduced intensively and the remained cracks on interlayer might be caused due to layer thickness that should be thinner. Beside the cracks, there are also some non-coated zones on surface which have been observed for all samples, therefore, it can be concluded that this undesired zones might be related to non-stable suspension. The stability of mentioned suspension might be increased by replacing the n-Hexane with more polar AHPCS’s solvents like Tetrahydrofuran with 4 times more dielectric constant than n-Hexane. The SEM investigations have also shown a number granulation spots remained from support’s surface which have been vanished sharply for cleaned supports.  In addition, support cleaning has increased the stability of SiC interlayer that is more evidenced for optimized cleaned conditions surface although sintering program can influence on this parameter obviously. On the other hand, by increasing the sonication time in cleaning process, most prepared surface was obtained for SiC interlayer coating.

Key words: Inorganic membrane, Silicon carbide support, Dip-coating technique.

Acknowledgments

The authors would like to thank Danish National Advanced Technology Foundation for project funding (Project # O59-2011-1).