SO2 Removal by NH3 Gas Injection: Effects of Temperature and Moisture Content

Bai, Hsun-Ling; Biswas, Pratim; Keener, Tim C.

doi:10.1021/ie00029a019

Cited by 40 publications

(38 citation statements)

References 9 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, SO 2 removal from flue gases is a goal of many air pollution engineers. Up to now, a number of new flue gas desulphurization (FGD) technologies have been applied to the removal of SO 2 , which are wet scrubbing (Meikap et al 2002;Jin et al 2006;Biswas 2007, 2008;Sarkar et al 2007), metal ion solutions (Barrie and Georgii 1967), catalytic oxidation (Pei-Shi et al 1998;Koutsopoulos et al 2006;Davenport and King 2006;Jiang et al 2008;Guo et al 2008), dry or semidry adsorption (Mangun et al 2001;Mok and Lee 2006;Liu 2007), and ammonia scrubbing (Bai et al 1994;He et al 2003). Among these, ammonia scrubbing has been successfully used to treat exhaust gases (He et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Oxygen in the flue gas may oxidize the sulfites to sulfates (Shale et al 1971;Shale 1973;Bai et al 1992Bai et al , 1994 (He et al 2003). A number of studies on the removal of SO 2 from flue gases by gaseous NH 3 injection have been conducted (Khan and Gibbs 1996;Bai et al 1994;He et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…A number of studies on the removal of SO 2 from flue gases by gaseous NH 3 injection have been conducted (Khan and Gibbs 1996;Bai et al 1994;He et al 2003). The studies of SO 2 removal by a liquid medium with NH 3 have been limited (Alix et al 2003).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous SO2 Removal by Wastewater with NH3

İpek

Ekinci

Arslan

et al. 2008

Water Air Soil Pollut

View full text Add to dashboard Cite

Sulfur dioxide (SO 2 ) is basically resulted from emission of fossil fuel. The ammonia washing is of methods used to remove SO 2 from fuel gas. Several wastewaters contain high ammonia concentrations causing the various problems at wastewater treatment or receiving environment. The synthetic wastewater containing NH 3 was sprayed down as flue gas moved up in the scrubber so that it could be a reaction between SO 2 and NH 3 . The effect of NH 3 concentration and pH on SO 2 removal was determined. SO 2 was decreased from about 1,000 to 0, 36, 49 and 66 ppm at NH 3 concentrations of 328, 88, 32 and 9 mg l −1 , respectively. While SO 2 of 1,000 ppm was completely treated at 328 mg NH 3 l −1 , pH was around 7.16 at the end of process. Consequently, it was recognized that this process could be used for both the SO 2 removal and the wastewater neutralization.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous SO2 Removal by Wastewater with NH3

İpek

Ekinci

Arslan

et al. 2008

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…Another advantage of using ammonia is the removal of hazardous NO x gases by reducing them to inert nitrogen [12,13]. This is done mainly by the process-selective noncatalyst reduction (SNCR, feedstock: ammonia or urea) or selective catalyst reduction (SCR, feedstock: ammonia).…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Modeling for Urea Hydrolysis in a Batch Reactor for Flue Gas Conditioning

Sahu¹,

Hussain²,

Meikap³

2011

Chem Eng & Technol

View full text Add to dashboard Cite

A computational fluid dynamics (CFD) model is proposed to simulate urea hydrolysis for ammonia synthesis as a safe feed stock to flue gas conditioning in thermal power plants. A series of parametric studies to investigate flow rates, thermal boundary conditions, and reactor geometry was performed and operating conditions and reactor geometry were optimized. Detailed 3D flow, heat, and chemistry simulations of ammonia were carried out with predicted conversions comparable to measurements and the dependence of the experiments on the reaction parameters was evaluated. Through simulation under the same conditions the output was generated and compared to the experimental plot. Profiles of temperature and flow patterns were successfully achieved through simulation.

show abstract

“…[3] Ammonia is superior to urea as such for SNCR in several important aspects for this application and is required for SCR applications. [4,5] *Correspondence to: B. C. Meikap, Department of Chemical Engineering, Indian Institute of Technology (IIT), Kharagpur, P.O. Kharagpur Technology, West Bengal, Pin-721302, India.…”

Section: Introductionmentioning

confidence: 99%

Response surface modeling and optimization for production of ammonia from urea in a batch reactor

Sahu

Patwardhan

Meikap

2009

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Ammonia is applied to removal of NO x contaminates contained in a flue gas stream from energy producing boilers and increase of efficiency of an electrostatic precipitator for removal of fly ash from flue gas stream from a boiler using fossil fuel. In this study, urea hydrolysis for production of ammonia, in different application areas that requires safe use of ammonia, was investigated in a batch reactor. The single and combined effects of operating parameters such as initial feed concentrations, temperature, time and stirring speed on the production of ammonia from urea were analyzed using response surface methodology (RSM). A 2 4 full factorial central composite experimental design was employed. Analysis of variance (ANOVA) showed a high coefficient of determination value (R 2 = 0.976) and satisfactory prediction second-order regression model was derived. The optimum production conditions were determined as temperature, 180• C; initial feed concentrations, 22.24 wt% of urea; time, 74.9 min and stirring speed, 1150 rpm. At optimum conversion conditions, the conversion of urea for production of ammonia was found to be 75.65%. 

show abstract

SO2 Removal by NH3 Gas Injection: Effects of Temperature and Moisture Content

Cited by 40 publications

References 9 publications

Simultaneous SO2 Removal by Wastewater with NH3

Simultaneous SO2 Removal by Wastewater with NH3

Computational Fluid Dynamics Modeling for Urea Hydrolysis in a Batch Reactor for Flue Gas Conditioning

Response surface modeling and optimization for production of ammonia from urea in a batch reactor

Contact Info

Product

Resources

About