PHYSICAL ADSORPTION OF REFORMING CATALYST BYNITROGEN
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Abstract
Physical adsorption by nitrogen gas was studied on seven commercial platinum reforming catalysts
(RG-402, RG-412, RG-432, RG-451, RG 422,RG-482, PS-10), four prepared platinum catalysts
(0.1%Pt/alumina, 0.2 %Pt/alumina, 0.45 %Pt/alumina and 0.55% Pt/alumina), and -alumina
support.
Physical adsorption was carried out by using Accelerated Surface Area and Porosimetry (ASAP
2400 device) at 77 K .
The results indicate that the surface area in genaral decreases with increasing platinum
percentage,high platinum loaded (0.45% and 0.55%) it was found that the percent increasing in
surface area was lower than those obtained for low platinum loaded catalysts , and at very higher
platinum loading 0.6 %Pt , some reduction in surface area was observed . The precipitation of Re
and Ir metals with 0.35 % and 0.6 % platinum increases the surface area , while precipitation of
0.57% Sn with 0.375% Pt/ -alumina deceases the surface area catalyst .
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References
Brunauer, S. P.H. Emmett, E. Teller, J. Am. Chem. (1938), Soc.60 309.
Charlton,J.S.,Cordey-Hayes,M.,and Harris,I.R.,J.Less (1970),Common Met.20,105
Dubinin, M.M. (1955), Quart. Rev. Chem. Soc. 9 101.
D.I Enache,V. (2001), Dumitresce,Al.,Buletinul UPG,.
Jhon.Thomas.W and Barry (1998), adsorption technology and design,.
Gregg, S.J. K.S.W. Sing, (1982), Adsorption, Surface Area and Porosity, Academic Press, London,.
Kenneth Sing.J. (2001), Collids and Surface . 3.
Lowell, S., and John, E., Shields, (1984), Powder Surface Area and Porosity, Chapman and Hall, London and New York,.
Michael,J.K.,Robert,L.F and Denis, G.s., (1982), Distribution of Pt and Re in Pt-Re/Alumina
Naphtha Reforming Catalysts, J.Catal.,178.445.
Oscik, J., (1982), Adsorption, Halsted Press, New York,.
Richardson, J.T., (1989), Principle of Catalyst Development, Houston, Texas, plenum press, New York,.
Savitzky,A., and Golay,M.J.E., (1964), Anal.Chem.,36,1627
Sing, K.S.W. (1976), Characterization of Powder Surfaces, Academic press, London,.
Van der Plas (1970), Physical and Chemical Aspects of Adsorbent and Catalysts,Academic Press,
Vanden,G.H.,and Rijnten,H., (1979), The Impergnation and Drying Step in Catalyst Manufacturing, studies in surface science and catalysis,Vol.3,265.
Young.D.M and A.D, (1962), Physical adsorption of gases, Butter Worths,London