STABLE SUPPORT FOR FISCHER-TROPSCH CATALYST

摘要

A process has been developed for preparing a Fischer-Tropsch catalyst precursor and a Fischer-Tropsch catalyst made from the precursor. The process includes contacting a gamma alumina catalyst support material with a first solution containing a vanadium compound and a phosphorus compound, to obtain a modified catalyst support material. The modified catalyst support material is calcined at a temperature of at least 500° C. The modified catalyst support is less soluble in acid solutions than an equivalent unmodified catalyst support. The modified catalyst support loses no more than 6% of its pore volume when exposed to water vapor. The modified catalyst support is contacted with a second solution which includes a precursor compound of an active cobalt catalyst component to obtain a catalyst precursor. The Fischer-Tropsch catalyst has enhanced hydrothermal stability as measured by losing no more than 10% of its pore volume when exposed to water vapor.

主权项

1. A Fischer-Tropsch catalyst prepared according to a process comprising:
a. impregnating a gamma alumina catalyst support material with a first solution comprising ammonium metavanadate and phosphoric acid to obtain a catalyst support material; b. calcining the catalyst support material at a temperature of at least 500° C. to obtain a modified catalyst support having a pore volume of at least 0.4 cc/g; wherein the modified catalyst support loses no more than 6% of its pore volume when exposed to water vapor; c. contacting the modified catalyst support with a second solution comprising a precursor compound of an active cobalt catalyst component to obtain a catalyst precursor; and d. reducing the catalyst precursor to activate the catalyst precursor to obtain the Fischer-Tropsch catalyst.