Process for the reduction of SO.sub.2 from wet lime/limestone ta

Details Process for the reduction of SO.sub.2 from wet lime/limestone ta Process for the reduction of SO.sub.2 from wet lime/limestone ta

1997-11-25

2000-02-22

Straub, Gary P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

42324308, 42324401, 4232441, 4232391, 423555, B01D 5350

Patent

active

060277041

ABSTRACT:
This invention describes a process for the scrubbing of sulfur oxides from the effluent of conventional wet lime/limestone SOx reduction processes in coal or oil-fired plants. The sulfur oxides are oxidatively sorbed onto solid sorbents such as magnesium aluminate spinel. Reduction with the appropriate reducing gases (such as hydrogen) regenerates the catalyst, also yielding a process stream concentrated in SOx. This concentrated SOx stream can then be refed to the front end of the coal or oil-fired plants, with the SOx thus produced ultimately being removed in the conventional wet scrubbing technology.

REFERENCES:
patent: 4183908 (1980-01-01), Rolfe
patent: 5229091 (1993-07-01), Buchanan et al.
patent: 5283055 (1994-02-01), Luck
patent: 5547648 (1996-08-01), Buchanan et al.
patent: 5728358 (1998-03-01), Avidan et al.

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