Support For Fischer-Tropsch Catalyst Having Improved Activity

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 calcined modified catalyst support has a pore volume of at least 0.4 cc/g. The modified catalyst support is less soluble in acid solutions than an equivalent unmodified catalyst support. The modified catalyst support is contacted with a second solution which includes a precursor compound of an active cobalt catalyst component and an organic compound, preferably glutaric acid, to obtain a catalyst precursor. The catalyst precursor is reduced to activate the catalyst precursor to obtain the Fischer-Tropsch catalyst. The catalyst has enhanced hydrothermal stability as measured by losing no more than 10% of its pore volume when exposed to water vapor. The catalyst has Co3O4 crystallites having an average size of no greater than 20 nm. As a result, the catalyst has good activity.

主权项

1. A process for preparing a Fischer Tropsch catalyst precursor, the process comprising:
a. contacting a gamma alumina catalyst support material with a first solution comprising vanadium and phosphorus, to obtain a catalyst support material; b. calcining the treated catalyst support material at a temperature of at least 500° C. to obtain a modified catalyst support having a modified support surface area and 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; and c. contacting the modified catalyst support with a second solution comprising a precursor compound of an active cobalt catalyst component and an organic compound to obtain a catalyst precursor.