Methods for preparation and use of liquid synthesis catalysts

Patent metadata

Field	Value
Publication number	US-11110438-B2
Application number	US-201916528124-A
Country	US
Kind code	B2
Filing date	Jul 31, 2019
Priority date	Jul 31, 2018
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

Described herein are catalysts relating to liquid synthesis, methods of their preparation, and methods of their use. In an embodiment according to the present disclosure, a method of producing a catalyst for liquid synthesis comprises: providing a silica oxide support; pretreating the silica oxide support to remove air and moisture; impregnating the pretreated silica oxide support with cobalt from a cobalt source using a cobalt impregnation method; and calcinating the impregnated silica oxide support in an oven with a temperature ramping profile, wherein the calcinating comprises feeding air into the oven.

First claim

Therefore, the following is claimed:

1. A method of using a liquid synthesis catalyst, comprising:
impregnating a silica oxide support with cobalt;
drying the impregnated silica oxide support with an inert gas at a temperature of about 90° C. to about 130° C.;
after drying with the inert gas, calcinating the impregnated silica oxide support in the presence of oxygen to produce a liquid synthesis catalyst;
positioning the liquid synthesis catalyst in a reactor;
bedding and packing the liquid synthesis catalyst in the reactor;
reducing the liquid synthesis catalyst with H 2 gas;
cooling the reactor to about 110° C. to about 160° C. while purging with H 2 gas and increasing the reactor pressure to a set pressure point;
activating the liquid synthesis catalyst by introducing a gas stream into the reactor, wherein the gas stream comprises H 2 gas and CO from a CO source at a molar ratio of 2:1 H 2 to CO; and
collecting the reaction products in a reaction vessel.

2. The method of claim 1 , wherein the bedding and packing comprises diluting the liquid synthesis catalyst with quartz and holding the mixture in a position in the reactor.

3. The method of claim 1 , wherein the set pressure point is about 150 psig to about 300 psig.

4. The method of claim 1 , further comprising separating the collected reaction products.

5. The method of claim 1 , wherein the inert gas is nitrogen (N 2 ) gas.

Assignees

• Univ Texas

Inventors

• Macdonnell Frederick M
• Dennis Brian H

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J35/37

  Crush or impact strength · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J35/393

  Metal or metal oxide crystallite size · CPC title