Investigation of combined SO{sub 2}/NO{sub x} removal by ceria sorbents. Quarterly technical progress report

Technical Report · Mon Jan 01 04:00:00 EST 1996

DOI:https://doi.org/10.2172/225027· OSTI ID:225027

Akyurtlu, A; Akyurtlu, J F

Simultaneous removal of SO{sub 2} and NO{sub x} using a regenerable solid sorbent will constitute an important improvement over the use of separate processes for the removal of these two pollutants from stack gases and possibly eliminate several shortcomings of the individual SO{sub 2} and NO{sub x} removal operations. Recent studies at PETC considered cerium oxide as an alternate sorbent to CuO. The present study aims to determine the effects of ammonia on the sulfation of the sorbent and to obtain a rate expression for the regeneration of alumina-supported CeO{sub 2} sorbents. In the past quarter the effect of ammonia on sulfation was investigated. It was found that the presence of ammonia affects the sulfation process unfavorably by forming ammonium sulfate species on the surface which subsequently decompose and cause sulfur loss from the surface. Since formation of surface ammonium sulfates increase the sorbent mass, it is difficult to deduce the magnitude of the sulfur loss from the surface only by thermogravimetric analysis.

• Research Organization: Hampton Univ., VA (United States). Dept. of Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-92MT92018
• OSTI ID: 225027
• Report Number(s): DOE/MT/92018--T4; ON: DE96010218
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
ADSORBENTS
AMMONIA
CERIUM OXIDES
CHEMICAL REACTIONS
COMBINED SOXNOX PROCESSES
EXPERIMENTAL DATA
NITROGEN OXIDES
PROGRESS REPORT
REGENERATION
REMOVAL
SORBENT RECOVERY SYSTEMS
SULFATION
SULFUR DIOXIDE
THERMAL GRAVIMETRIC ANALYSIS