CATEGORY: HYDROCRACKING
MACS VI, Satillieu : France (2013)
Correlation
between structure and performanceof vacuum gas oil hydrocracking catalysts in a
batch reactor
R. HENRY (1), M.
Tayakout-Fayolle (1), P. Afanasiev (1), C. Lorentz (1), Gregory Lapisardi, Gerhard Pirngruber
1 Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON),
CNRS : UMR5256 – Université Claude Bernard - Lyon I
Abstract
To
produce the innovative hydrocracking catalysts the refining industry requires
for increasingly heavy crudes, the behavior of these catalysts must to be
better understood. Researchers present a novel approach for studying and
modeling complex reaction kinetics with a batch reactor test.
They built a batch reactor apparatus for this purpose. Triphasic
reactions took place in a laboratory-scale reactor equipped with a
Robinson-Mahoney stationary basket, a hydrogen injection system and
liquid/vapor sampling system. Feedstock was a hydrotreated vacuum gas oil. Reaction
conditions were 400°C and 120 bars. Various bifunctional catalysts were
characterized and tested over 3 hour and 6 hour-reactions. Gas and liquid
samples were then analyzed by one and two-dimensional gas chromatography, in
order to obtain precise composition of each phase during the reaction. The lack
of mass transfer limitations at vapor-liquid interface and at liquid-solid
interface was confirmed by modifying the stirring speed and the size of the
catalyst pellets. The method allows access to intrinsic kinetic properties of
the catalysts. A follow-up experiment was conducted, with the purpose of
testing catalysts containing different amounts of molybdenum and zeolite.
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