Catalyst and process for the production of diesel fuel from national gas, natural gas liquids, or other gaseous feedstocks
A unique process and catalyst is described that operates efficiently for the direct production of a high cetane diesel type fuel or diesel type blending stock from stochiometric mixtures of hydrogen and carbon monoxide. This invention allows for, but is not limited to, the economical and efficient production high quality diesel type fuels from small or distributed fuel production plants that have an annual production capacity of less than 10,000 barrels of product per day, by eliminating traditional wax upgrading processes. This catalytic process is ideal for distributed diesel fuel production plants such as gas to liquids production and other applications that require optimized economics based on supporting distributed feedstock resources.
1. A process for the production of a diesel fuel blend comprising the steps of:
a) reducing a supported catalyst in-situ in a fixed bed reactor to provide a reduced catalyst;
b) converting CO 2 into syngas
c) reacting the sygas with the reduced catalyst to produce a hydrocarbon product stream, wherein the hydrocarbon product stream comprises light gases, a diesel fuel and a wax
d) condensing the diesel fuel and wax, wherein the diesel fuel comprises more than ⅔ of the diesel fuel and wax together, and wherein a majority of hydrocarbons in the diesel fuel are C8-C24 hydrocarbons; and
e) blending the diesel fuel, without refining the diesel fuel, with a petroleum fuel, thereby producing a diesel fuel blend.
2. The process for the production of a diesel fuel blend according to claim 1 , wherein the catalyst has
a pore diameter greater than 80 angstroms and;
a crush strength of greater than 3 lbs/mm and;
a BET surface area of greater than 110 m 2 /g
a dispersion value between 2% and 10%.
3. The process of claim 1 , wherein the catalyst is reduced with hydrogen at temperatures below 650 F.
4. The process of claim 1 , wherein the supported catalyst comprises a lobed support with more than four lobes and an effective pellet radius of less than 600 microns.
5. The process of claim 4 , wherein all of the lobes are not equal lengths.
6. The process of claim 3 , wherein the supported catalyst further comprises about 0.01 weight percent to about 2.0 weight percent of a promoter selected from the group consisting of cerium, ruthenium, lanthanum, platinum, rhenium, gold, nickel or rhodium and a combination thereof.
7. The process of claim 1 , wherein consists of no greater than 0.5 wt. % of each carbon number greater than C35.
8. The process of claim 1 , wherein the catalyst comprises a metal catalyst, and wherein the metal catalyst comprises cobalt, iron, nickel or combinations thereof.