Claims
- 1. In a process for combusting solid, sulfur-containing material by contacting said material with gaseous oxygen in a combustion zone at combustion conditions to produce combustion products including at least one sulfur oxide, the improvement comprising carrying out said contacting in the presence of discrete particles containing a metal-containing spinel, thereby reducing the amount of sulfur oxide emitted from said combustion zone, said metal containing spinel including a first metal and at least two different second metals having valences higher than the valence of said first metal, one of said second metals being aluminum and the other of said second metals being trivalent and selected from the group consisting of iron, chromium, vanadium, manganese, gallium, boron, cobalt and mixtures thereof, the atomic ratio of said first metal to said second metals in said spinel is at least about 0.17 and said spinel has a surface area in the range of about 25 m.sup.2 /gm. to about 600 m.sup.2 /gm.
- 2. In a process for combusting solid, sulfur-containing material by contacting said material with a gaseous oxygen in a combustion zone at combustion conditions to produce combustion products including at least one sulfur oxide, the improvement comprising carrying out said contacting in the presence of discrete particles containing a major amount of metal-containing spinel, thereby reducing the amount of sulfur oxide emitted from said combustion zone, said metal containing spinel including a first metal and at least two different second metals having valences higher than the valence of said first metal, one of said second metals being aluminum and the other of said second metals being trivalent and selected from the group consisting of iron, chromium, vanadium, manganese, gallium, boron, cobalt and mixtures thereof, the atomic ratio of said first metal to said second metals in said spinel is at least about 0.17.
RELATED APPLICATIONS
This application is a division of prior U.S. application Ser. No. 692,448, filed 1/16/85, now U.S. Pat. No. 4,642,178, which is a division of application Ser. No. 494,604, filed 5/16/83, now U.S. Pat. No. 4,495,304, which is a continuation-in-part of application Ser. No. 301,678, filed 9/14/81, now abandoned, which is a continuation-in-part of application Ser. No. 173,315, filed 7/29/80, now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (1)
Number |
Date |
Country |
7116578 |
Jun 1972 |
NLX |
Divisions (2)
|
Number |
Date |
Country |
Parent |
692448 |
Jan 1985 |
|
Parent |
494604 |
May 1983 |
|
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
301678 |
Sep 1981 |
|
Parent |
173315 |
Jul 1980 |
|