| 摘要 |
A two-stage catalytic hydroconversion process using a largepore catalyst in the first stage reactor and a small-pore catalyst in the second stage reactor for hydroconversion and demetallization of coal or petroleum asphaltene feed materials to produce distillate liquid fuels. The large-pore catalyst is characterized by having pore diameters larger than 1000A occupying a major portion of the catalyst total pore volume of 0.2 to 1.0 cc/gm, avoiding micropores smaller than about 30A and having a surface area lower than 40 m2/g. The small-pore catalyst is characterized by having pore diameters smaller than 1000A occupying a major portion of the catalyst total pore volume.
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