| Main Title |
Structural Changes in Surfactant-Modified Sorbents during Furnace Injection. |
| Author |
Kirchgessner, D. A. ;
Jozewicz, W. ;
|
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. ;Acurex Corp., Research Triangle Park, NC. |
| Publisher |
cMar 89 |
| Year Published |
1989 |
| Report Number |
EPA/600/J-89/008; |
| Stock Number |
PB89-236384 |
| Additional Subjects |
Air pollution control ;
Sorbents ;
Surfactants ;
Sulfur dioxide ;
Particle size ;
Calcium hydroxides ;
Sintering ;
Porosity ;
Surface chemistry ;
Diffusion ;
Chemical reactions ;
Experimental design ;
Reprints ;
Limestone injection multistage burners process ;
Calcium lignosulfonate
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB89-236384 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
9p |
| Abstract |
The paper discusses a calcium hydroxide (Ca(OH)2) sorbent, modified by the addition of calcium lignosulfonate, that was recently developed for use in EPA's LIMB (limestone injection multistage burners) process. The increased reactivity with sulfur dioxide (SO2) displayed by this modified sorbent has been shown to be caused, in part, by its decreased particle (agglomerate) size compared to conventional Ca(OH)2. Subsequent work has shown that surfactant-modified Ca(OH)2 also undergoes significantly different structural changes during furnace injection. For a given reactor temperature and residence time, the modified sorbent calcines to a greater extent that unmodified sorbent. It also loses surface area more slowly, and retains more of its porosity, suggesting that it sinters more slowly than conventional sorbent. Therefore, in addition to reducing the particle size of Ca(OH)2 in some applications, calcium lignosulfonate also appears to cause the water of hydration to be bound less tightly, and to inhibit one or more of the diffusion mechanisms responsible for the process of sintering. |
| Supplementary Notes |
Pub. in American Institute of Chemical Engineers Jnl., v35 n3 p500-506, Mar 89. Prepared in cooperation with Acurex Corp., Research Triangle Park, NC. |
| NTIS Title Notes |
Journal article Oct 86-Oct 87. |
| Title Annotations |
Reprint: Structural Changes in Surfactant-Modified Sorbents during Furnace Injection. |
| Category Codes |
68A; 99F |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/13 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
931317683 |
| Origin |
NTIS |
| Type |
CAT |
