| 摘要 |
Syngas with a H2/CO mol.ratio between 0.75 and 1.75 is converted into hydrocarbons by contacting it first with a cobalt-containing Fischer-Tropsch catalyst under such conditions that the conversion lies within a specified range depending on the H2/CO mol.ratio of the syngas feed, and thereafter, after water removal, with a catalyst composition comprising both hydrocarbon synthesis- and CO-shift activity. A high H2 + CO-conversion combined with a high C5<+> selectivity can be obtained starting from a syngas with a H2/CO mol.ratio (F) between 0.75 and 1.75 by carrying out the process in two stages as described herein before under such conditions that in the first stage the following relation is met: 150 x F-0.5 DIVIDED F+1 < C < 250 x F-0.5 DIVIDED F+1, in which C represents the H2 + Co-conversion in mol.%. The Co-containing catalyst comprises 3-60 pbw Co, 0.1-100 pbw Ti, Zr and/or Cr per 100 pbw silica and/or alumina. |
