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Citation: Xie Xiaofan, Dou Bosheng, Fan Shurong, Hu Gang, Fan Yuqin, Wang Yujie. STUDY ON La-PROMOTED SULFUR RESISTANT WATER GAS SHIFT CATALYST[J]. Chinese Journal of Applied Chemistry, ;1989, 6(2): 1-4. shu

STUDY ON La-PROMOTED SULFUR RESISTANT WATER GAS SHIFT CATALYST

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 8 December 1987
Available Online: 10 September 1988

A more active and heat resistant water gas shift catalyst Co Mo K/Al₂O₃ has been obtained by modification of Al₂O₃ support with La₂O₃ (ranging from 0.5 to 1 wt.% based on the catalyst) and aftertreatment at 600℃. La-promoted catalyst lost~50% of its initial activity after water gas shift reaction which is accelerated at 500℃, while the unpromoted catalyst lost~70%. The activity of deteriorated catalyst can be restored by treatment with H₂S/H₂, but the rate of reactivation of the La-promoted is greater than that of the unpromoted. No obvious difference was found in the sulfidation of catalyst with H₂S/H₂ and temperature programmed reduction determination and pyridine adsorption on sulfided catalyst. XPS data indicated that a better dispersion of Mo and less Mo⁶⁺formed during water gas shift reaction on the La-promoted catalyst.
- Cobalt molybdenum catalyst,
- Water gas shift,
- Lathanum promoter,
- Sulfur resistant
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