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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 10
BKCSDE 34(10)
October 20, 2013 

Effect of Manganese Promotion on Al-Pillared Montmorillonite Supported Cobalt Nanoparticles for Fischer-Tropsch Synthesis
N. Ahmad*, S. T. Hussain, B. Muhammad, N. Ali, S. M. Abbas, Y. Khan
Cobalt, Aluminium, Montmorillonite, Manganese promotion, FT Synthesis
The effect of Mn-promotion on high surface area Al-pillared montmorillonite (AlMMT) supported Co nanoparticles prepared by hydrothermal method have been investigated. A series of different weight% Mnpromoted Co nanoparticles were prepared and characterized by XRD, TPR, TGA, BET and SEM techniques. An increase in the surface area of MMT is observed with Al-pillaring. Fischer-Tropsch catalytic activity of the as prepared catalysts was studied in a fixed bed micro reactor at 225 oC, H2/CO = 2 and at 1 atm pressure. The data showed that by the addition of Mn the selectivity of C1 dropped drastically while that of C2-C12 hydrocarbons increased significantly over all the Mn-promoted Co/AlMMT catalysts. The C13-C20 hydrocarbons remained almost same for all the catalysts while the selectivity of C21+ long chain hydrocarbons decreased considerably with the addition of Mn. The catalyst with 3.5%Mn showed lowest C21+ and highest C2-C12 hydrocarbons selectivity due to cracking of long chain hydrocarbons over acidic sites of MMT.
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