Process for removing sulfur from sulfur-containing gases: high calcium fly-ash
- Austin, TX
- Cary, NC
The present disclosure relates to improved processes for treating hot sulfur-containing flue gas to remove sulfur therefrom. Processes in accordance with the present invention include preparing an aqueous slurry composed of a calcium alkali source and a source of reactive silica and/or alumina, heating the slurry to above-ambient temperatures for a period of time in order to facilitate the formation of sulfur-absorbing calcium silicates or aluminates, and treating the gas with the heat-treated slurry components. Examples disclosed herein demonstrate the utility of these processes in achieving improved sulfur-absorbing capabilities. Additionally, disclosure is provided which illustrates preferred configurations for employing the present processes both as a dry sorbent injection and for use in conjunction with a spray dryer and/or bagfilter. Retrofit application to existing systems is also addressed.
- Research Organization:
- University of Texas
- DOE Contract Number:
- FG22-85PC81006
- Assignee:
- Board of Regents, University of Texas System (Austin, TX) [*] Notice: portion of term of this patent subsequent to February 14, 2006 has been disclaimed.
- Patent Number(s):
- US 5047222
- OSTI ID:
- 867977
- Country of Publication:
- United States
- Language:
- English
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Process for removing sulfur from sulfur-containing gases
Process for removing sulfur from sulfur-containing gases
Related Subjects
removing
sulfur
sulfur-containing
gases
calcium
fly-ash
disclosure
relates
improved
processes
treating
hot
flue
gas
remove
therefrom
accordance
preparing
aqueous
slurry
composed
alkali
source
reactive
silica
alumina
heating
above-ambient
temperatures
period
time
facilitate
formation
sulfur-absorbing
silicates
aluminates
heat-treated
components
examples
disclosed
demonstrate
utility
achieving
capabilities
additionally
provided
illustrates
preferred
configurations
employing
dry
sorbent
injection
conjunction
spray
dryer
bagfilter
retrofit
application
existing
systems
addressed
containing gases
spray dryer
removing sulfur
improved process
ambient temperature
disclosure relates
flue gas
containing gas
aqueous slurry
sulfur-containing gases
remove sulfur
ambient temperatures
sulfur therefrom
sulfur-containing gas
achieving improved
preferred configuration
reactive silica
treating hot
sulfur-containing flue
hot sulfur-containing
improved processes
treated slurry
calcium silicate
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