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 photoelectron spectroscopy (XPS) were in satisfactory agreement with the results obtained by radiosulfur. Significantly different sulfur uptakes were observed for the different samples.
Tétényi
Pál
P
Institute of Isotopes of the Hungarian Academy of Sciences, Budapest, P.O.B. 77, Hungary. tetenyi@iki.kfki.hu
Ollár
Tamás
T
Schay
Zoltán
Z
Schnörch
Péter
P
Szarvas
Tibor
T