Dry processes, apparatus, compositions and systems for reducing sulfur oxides and HCI
US8916120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2013 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Apr 1, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J2219/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Dry processes, apparatus, compositions and systems are provided for reducing emissions of sulfur oxides, and sulfur dioxide in particular, and/or HCl in a process employing a combination of a dolomite hydrate sorbent and a sorbent doping agent administered to achieve coverage of a three-dimensional cross section of a passage carrying SOx and/or HCl —containing gases with a short but effective residence time at a temperature effective to provide significant sulfur dioxide and/or HCl reductions with high rates of reaction and sorbent utilization. The once-through, dry process can advantageously introduce the sorbent and sorbent doping agent dry or preferably as a slurry to enable uniform treatment. Preferred sorbent doping agents include water-soluble or water-dispersible copper and/or iron compositions which can be heated to an active form in situ by the flue gases being treated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.