Method of removing sulfur emissions from a fluidized-bed combustion process
US4091076A · kind A · utility
15Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1976 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | May 7, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/508
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Alkali metal or alkaline earth metal oxides are impregnated within refractory support material such as alumina and introduced into a fluidized-bed process for the combustion of coal. Sulfur dioxide produced during combustion reacts with the metal oxide to form metal sulfates within the porous support material. The support material is removed from the process and the metal sulfate regenerated to metal oxide by chemical reduction. Suitable pore sizes are originally developed within the support material by heat-treating to accommodate both the sulfation and regeneration while still maintaining good particle strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.