| 摘要 |
A water gas shift reactor 1 comprises a fist water gas shift reaction zone 2 in series with a second water gas shift zone 3 comprising different catalyst material. No heat exchanger is used on gases leaving the first zone and entering the second zone therefore the temperature of the gases leaving the first zone is the same as the temperature of the gases entering the second zone. The water gas shift zones comprise different catalysts arranged such that the first zone comprises a catalyst having positive order kinetics, comprising for example gold dispersed on ceria or zirconia, and the second water gas shift zone comprises a catalyst having negative order kinetics, comprising platinum dispersed on ceria or zirconia. The catalysts may be arranged such that the first zone comprises a high temperature catalyst and the second zone comprises a low temperature catalyst or vice versa. The catalyst may be supported on a single or double monolith, foam or in a bed arrangement. |
