Regenerable manganese oxide hot gas desulfurization process

Details Regenerable manganese oxide hot gas desulfurization process Regenerable manganese oxide hot gas desulfurization process

1980-02-21

1981-08-11

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423244, 423539, 423605, C01B 1716, C01B 3120, B01J 800, C01B 1700

Patent

active

042833744

ABSTRACT:
A continuous regenerative process for desulfurizing a hot reducing gas is disclosed. The gas is scrubbed by a sorbent containing MnO and Mn.sub.3 O.sub.4. The spent sorbent is regenerated by reacting the MnS with an excess of Mn.sub.3 O.sub.4, contained in oxidized sorbent. The oxidized sorbent is obtained by reacting part of the regenerated sorbent with air. In the regenerator the gaseous oxygen partial pressure is maintained below 10.sup.-6 atmospheres which allows the SO.sub.2 partial pressure to be maintained above 1 atmosphere without causing sulfation.

REFERENCES:
patent: 2984545 (1961-05-01), Tarbutton et al.
patent: 3723598 (1975-03-01), Spedden et al.
Turkdoggan et al., Metallurgical Transactions B vol. 88, Mar. 1977 pp. 59-65.
Hemmings et al., Thermodynamic Phase Stability Diagrams for the Analysis of Corrosion Reactions in Coal Gasification Combustion Atmospheres, Dec. 1977.

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