Particulate solids for catalyst supports and heat transfer mater

Details Particulate solids for catalyst supports and heat transfer mater Particulate solids for catalyst supports and heat transfer mater

1994-11-29

1995-12-19

Lone, Werren B.

Chemistry: fischer-tropsch processes; or purification or recover

With preliminary reaction to form hydrogen or a carbon oxide

Gaseous oxygen utilized in the preliminary reaction

518704, 518711, 502304, 502335, 252373, C07C 2700

Patent

active

054768772

ABSTRACT:
A particulate, precalcined low silica content zirconia, especially one stabilizer with yttria, is useful as a catalyst support or as a heat transfer solids component for conducting chemical reactions at high temperature, in oxidizing, reducing or hydrothermal conditions, especially in syn gas operations. An admixture of precalcined particulate low silica content zirconia, particularly a low silica content yttria-stabilized zirconia, is employed in a preferred embodiment as a heat transfer solid, in concentrations ranging generally from about 10 wt. % to about 99.9 wt. % with a particulate catalyst notably a nickel-on-alumina catalyst, in concentration ranging generally from about 0. 1 wt. % to about 90 wt. %. Such an admixture provides a particularly useful catalytic contact mass in high temperature oxidizing, reducing and hydrothermal environments, notably in conducting synthesis gas generation operations. This type of bed promotes continuous, highly efficient heat and mass transfer within the reacting gas phase. The presence of the heat transfer solid as a bed component maintains excellent bed fluidization characteristics, suppressing the normal tendency of the catalyst to sinter or agglomerate; tendencies which promote defluidization of the bed. Moreover, the heat transfer particles of the bed are highly attrition resistant, and are chemically compatible with the catalyst particles of the admixture.

REFERENCES:
patent: 4910228 (1990-03-01), Lywood
patent: 5023276 (1991-06-01), Yarrington et al.
patent: 5252609 (1993-10-01), Pinto
patent: 5395813 (1995-03-01), Clavenna et al.

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