Sulfur uptake determination on Ni containing molybdena-alumina samples by radioisotope tracer techni
March 29th, 2008 | by admin |Sulfur uptake determination on Ni containing molybdena-alumina samples by radioisotope tracer technique.
Five solid oxides, used as hydrodesulfurization catalysts (Al(2)O(3) supported Ni, MoO(x), Ni-MoO(x)-s of different Ni:Mo ratio) were sulfided by [(35)S]H(2)S. Amounts of the total, reversible and irreversible sulfur uptakes were determined measuring the change of gas phase radioactivity during exposure [(35)S]H(2)S to the oxides, and compared with the amounts determined measuring radioactivity of the sulfided samples. The S/(Ni+Mo) values determined by X-ray fluorescence spectroscopy (XPS) were in satisfactory agreement with the results obtained by radiosulfur. Significantly different sulfur uptakes were observed for the different samples.
Tétényi P, Ollár T, Schay Z, Schnörch P, Szarvas T.
Institute of Isotopes of the Hungarian Academy of Sciences, H-1525 Budapest, P.O.B. 77, Hungary.