Chromium-free, iron-based catalyst for water gas shift reaction and methods of use thereof
A chromium-free catalyst for use in a fluidized bed reactor is described. The catalyst comprises 45-70 wt % Fe 2 O 3 , 5-15 wt % CuO, 20-35 wt % Al 2 O 3 , 10-20 wt % ZnO, and 1-15 wt % K 2 CO 3 . The catalyst has a Davison Index (DI %) of less than or equal to 15. A method for converting carbon monoxide (CO) into carbon-dioxide (CO 2 ) using the catalyst is described. The method includes introducing H 2 O and CO into a fluidized bed reactor having an operating temperature between about 375° C. and about 450° C. and comprising the chromium free catalyst. The CO conversion is at least 60%.
1. Fluidizable and attrition-resistant chromium-free catalyst for use in water gas shift reaction in a fluidized bed reactor, comprising
45-70 wt % Fe 2 O 3
5-15 wt % CuO
20-35 wt % Al 2 O 3
10-25 wt % ZnO,
1-15 wt % K 2 CO 3
wherein the catalyst has a Davison Index (DI) of less than or equal to 15.
2. The catalyst of claim 1 , having a BET surface area of about 10-60 m 2 /g.
3. The catalyst of claim 1 , having a density of about 0.8 to about 1.8 g/ml.
4. The catalyst of claim 1 , comprising about 4-6 wt % K 2 CO 3 .
5. The catalyst of claim 1 , comprising about 50-60 wt % Fe 2 O 3 .
6. The catalyst of claim 1 , comprising about 20-25 wt % Al 2 O 3 .
7. The catalyst of claim 1 , comprising about 10-15 wt % ZnO.
8. The catalyst of claim 1 , comprising about 5-10 wt % CuO and optionally 0 to 15 wt % MgO and/or optionally 0 to 15 wt % CeO 2 .
9. The catalyst of claim 1 , wherein the DI is between about 5 and about 7.