Production of hydrocarbons

摘要

A process for producing hydrocarbons and, optionally, oxygenates of hydrocarbons is provided. A synthesis gas comprises hydrogen, carbon monoxide and N-containing contaminants selected from the group consisting of HCN, NH3, NO, RXNH3-X, R1—CN and heterocyclic compounds containing at least one nitrogen atom as a ring member of a heterocyclic ring of the heterocyclic compound. The N-containing contaminants constitute, in total, at least 100 vppb but less than 1 000 000 vppb of the synthesis gas. The synthesis gas is contacted at an elevated temperature and an elevated pressure, with a particulate supported Fischer-Tropsch synthesis catalyst. The catalyst comprises a catalyst support, Co in catalytically active form supported on the catalyst support, and a dopant selected from the group consisting of platinum (Pt), palladium (Pd), ruthenium (Ru) and/or rhenium (Re). The dopant level is expressed by a formula. Hydrocarbons and, optionally, oxygenates of hydrocarbons are obtained.

主权项

1. A process for producing hydrocarbons and, optionally, oxygenates of hydrocarbons, which process includes contacting a synthesis gas comprising hydrogen, carbon monoxide and N-containing contaminants selected from the group consisting of HCN, NH3, NO, RxNH3-x where R is a hydrocarbyl group and/or an oxygenated hydrocarbyl group and x is 1, 2 or 3, with R being the same or different when x is 2 or 3, R1—CN where R1 is a hydrocarbyl group, and heterocyclic compounds containing at least one nitrogen atom as a ring member of a heterocyclic ring of the heterocyclic compound, with the N-containing contaminants constituting, in total, at least 100 vppb but less than 1 000 000 vppb of the synthesis gas, at a temperature of at least 180° C. and a pressure of at least 10 bar(a), with a particulate supported Fischer-Tropsch synthesis catalyst which comprises a catalyst support, Co in catalytically active form supported on the catalyst support, and a dopant selected from the group consisting of platinum (Pt), palladium (Pd), ruthenium (Ru), rhenium (Re) and a mixture of two or more thereof at a dopant level expressed by formula 1:w0.024⁢Ru+x0.0030⁢Pd+y0.0025⁢Pt+z0.1⁢Re=awhere
w is expressed as g Ru/g Co, and w<0.019 g Ru/g Co; x is expressed as g Pd/g Co; y is expressed as g Pt/g Co; z is expressed as g Re/g Co, and z<0.005 g Re/g Co; and 0