| Autor: |
R. van Yperen, E. Boellaard, A. A. van der Horst, J.W. Geus, A.J. van Dillen, A.M. van der Kraan |
| Rok vydání: |
1995 |
| Předmět: |
|
| DOI: |
10.1016/s0167-2991(06)81797-0 |
| Popis: |
Iron-molybdenum mixed oxide absorbents supported on amorphous AlPO 4 can bevery well adapted for the removal of H 2 S from coal gas at high temperatures. Although the reaction of iron(III) with phosphate decreases the capacity of the absorbent to remove H 2 S, the strong interaction with the support ensures a high thermal stability. During regeneration with oxygen of absorbents based on iron oxide at temperaturesbelow 650°C Fe 2 (SO 4 ) 3 is formed. Decomposition of Fe 2 (SO 4 ) 3 in the subsequent absorption step leads to contamination of the purified coal gas with SO 2 . With desulfurization processes based on iron-molybdenum mixed oxides regeneration can be performed at a temperature lower than 650°C, while Fe 2 (SO 4 ) 3 is not formed The required regeneration temperature decreases with lower Fe/Mo ratios. Instead of O 2 , also SO 2 can be used for the regeneration of sulfidized samples. Ironmolybdenum mixed oxide absorbents applied onto amorphous AlPO 4 were regenerable with SO 2 at a temperature of 500°C. However, the regeneration rate is lower than with oxygen. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
