Sorbent utilization studies using a mini-pilot spray dryer. Final report, 1 September 1992--31 August 1993

Technical Report · Thu Sep 30 00:00:00 EDT 1993

DOI:https://doi.org/10.2172/10154679· OSTI ID:10154679

Keener, T C; Khang, S J; Wang, J; Sanders, J F

The main body of the report consists of four parts: 1. additives to change process chemistry for SO{sub 2} absorption by Ca(OH){sub 2} slurry; 2. recycle tests and hydration of fly ash with Ca(OH){sub 2} to increase reactivity; 3. limestone as an alternative sorbent and additive effects; 4. physical and chemical model developments for some of the additive effects and spray dryer mathematical model application. As the concentration of SO{sub 2} in the flue gases increases, the SO{sub 2} removal efficiency will go down. Additives such as delinquent salts (NaOH, NaCl, and NaHCO{sub 3}) have been shown to improve SO{sub 2} uptake, and these additive tests have indicated that SO{sub 2} uptake may be increased by as much as 60% over baseline conditions. Other additives such as H{sub 2}O{sub 2}, sugar, and some organic acids which can change the chemical reaction processes are suggested and tested, and some promising results have been obtained. Recycle has been shown to increase sorbent utilization by allowing partially reacted sorbent to react further with the SO{sub 2} in the flue gases. Two types of Ohio coal fly ashes have been extensively studied, and improvement of utilization in spray dryer flue gas desulfurization has been demonstrated. Limestone represents an area where significant cost savings can be realized. The spray dryer tests were designed to provide some results for understanding the magnitude of the limestone performance in the spray dryer system and the additive effects. The additive effects on increasing SO{sub 2} absorption by Ca(OH){sub 2} slurry were investigated, and the chemical and physical properties of these tested additives were studied. Some models have been formed to explain the additive phenomena.

• Research Organization: Ohio Coal Development Office, Columbus, OH (United States); Cincinnati Univ., OH (United States). Dept. of Civil and Environmental Engineering
• Sponsoring Organization: Ohio State Government, Columbus, OH (United States)
• OSTI ID: 10154679
• Report Number(s): OCDO-94012362; ON: TI94012362; TRN: AHC29412%%63
• Resource Relation: Other Information: PBD: 30 Sep 1993
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
FLUE GAS
SPRAY DRYING
DESULFURIZATION
ADSORBENTS
PERFORMANCE TESTING
POLLUTION CONTROL EQUIPMENT
MATHEMATICAL MODELS
PROGRESS REPORT
SULFUR DIOXIDE
CALCIUM HYDROXIDES
SODIUM HYDROXIDES
SODIUM CHLORIDES
SODIUM CARBONATES
OPTIMIZATION
HYDROGEN PEROXIDE
SACCHARIDES
RECYCLING
EXPERIMENTAL DATA
010800
WASTE MANAGEMENT