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

Technical Report · Thu Sep 30 04:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

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