Abstract
Change in the catalyst property during the catalytic hydrotreating of a blend of 25 percent SRC and 75 percent creosote oil using 0.1 L/h fixed bed reactor has been studied. The results obtained here can be summarized as follows;
1) A decrease of the surface area of the catalyst is mainly ascribed to the coke formation.
2) Chemical analysis data of used catalysts show that each mineral component accumulates separately, namely, Iron accumulates more at the top of the catalyst bed, but Ca and Ti seem to be deposited uniformly through the catalyst bed. Si deposition is not observed through the bed in this study.
3) The mineral components do not penetrate into the particles of catalyst A which has only micropores in the range 4 to 10 nm, and the deposition of these components is observed only around the outer surface of the catalyst particles. On the other hand, in case of catalyst B which has macropores around 60 nm in addition to the micropores, the mineral components can penetrate into the catalyst particles at the upstream part of the reactor, but it seems to be difficult forthem to penetrate into the catalyst particles at the downstream part of the reactor. This different penetration behavior could be due to the particle size distribution of each mineral component.
