Effects of Platinum Area and Surface Acidity on Hydrocracking Activity

Catalytic Hydrocracking. Hydrocracking of a Low Temperature Coal Tar

“…Almost all the work reported so far was done on either thermal or catalytic hydrocracking of coal liquids over refining or hydrogenation catalysts (Alpert et al, 1964;Carpenter et al, 1963; Central Air Documents Office, 1951; Rutkowski, 1965). In recent years, dual-functional catalysts containing both hydrogenation and cracking activities were developed for the hydrocracking of petroleum fractions (Larson et al, 1962;Myers et al, 1962). These catalysts contain hydrogenation and cracking components and yield improved product distributions (Archibald et al, 1960;Flinn et al, 1960).…”

“…The earlier work was mainly done in connection with the development of coal hydrogenation processes (Gordon, 1935(Gordon, , 1946(Gordon, , 1947Kronig, 1949;Pier, 1949), where a two-stage process was used in which coal was liquefied in the first stage, and the resulting heavy oil was hydrocracked in a subsequent stage to gasoline. In recent years, dual-functional catalysts containing both hydrogenation and cracking activities were developed for the hydrocracking of petroleum fractions (Larson et al, 1962;Myers et al, 1962). In recent years, dual-functional catalysts containing both hydrogenation and cracking activities were developed for the hydrocracking of petroleum fractions (Larson et al, 1962;Myers et al, 1962).…”

Hydrocracking of n‐heptane. Study of NiO—MoO3 catalysts supported on a HY ultrastable zeolite

“…The metal component is chosen from among the noble metals (Pd, Pt) (Coonradt et al, 1960;Larson et al, 1962) or, when treating feeds containing sulfur, nitrogen and other contaminants, from metals of groups Vlll and VIB (Ternan and Parsons, 1979;Mooi, 1980).…”

Zeolite Catalysts. Hydrocracking and Hydroisomerization of n-Dodecane

“…The composition of the reaction products from hydrocracking is principally dependent on reaction temperature and the relationship of hydrogenation-dehydrogenation activity to the acidity responsible for the cracking activity of the bifunctional catalyst (1,6,8,9,11). The principal and widely accepted reaction scheme of hydrocracking (6,8,12) starts with the formation of olefins from paraffins at metallic centers and the formation of carbonium ions from these olefins at acidic centers.…”