An investigation of mass transfer-reaction kinetics of NO absorption by wet scrubbing using an electrolyzed seawater solution

作者：Han, Zhitao; Yang, Shaolong^*; Zhao, Dongsheng; Liu, Bojun; Pan, Xinxiang; Yan, Zhijun

来源：RSC Advances, 2017, 7(31): 18821-18829.

DOI：10.1039/c7ra01608e

• SIMULATED FLUE-GAS
• NITRIC-OXIDE
• SULFUR-DIOXIDE
• SIMULTANEOUS REMOVAL
• AQUEOUS-SOLUTIONS
• NITROGEN-DIOXIDE
• SODIUM PERSULFATE
• REACTION PATHWAYS
• PLASMA OXIDATION
• SO2

The mass transfer-reaction kinetics of NO absorption by wet scrubbing using electrolyzed seawater was studied in a bench-scale bubbling reactor. The effects of active chlorine concentration, solution pH, absorbent temperature, NO and SO2 inlet concentrations on NO absorption rate were investigated. The results showed that the NO absorption rate significantly increased from 0.41 x 10(-5) to 1.91 x 10(-5) mol m(-2) s(-1) with the active chlorine concentration increasing from 500 to 3100 mg L-1 [Cl-2]. The NO absorption rate greatly increased from 0.25 x 10(-5) to 1.58 x 10(-5) mol m(-2) s(-1) with NO concentration increasing from 250 to 1250 ppm. When SO2 inlet concentration increased from 250 to 1250 ppm, the NO absorption rate slightly increased from 1.09 x 10(-5) to 1.17 x 10(-5) mol m(-2) s(-1). When the solution pH was in the range of 4-6, the NO absorption rate was about 1.5 x 10(-5) mol m(-2) s(-1). The change of the NO absorption rate was insignificant with the absorbent temperature increasing from 20 to 50 degrees C. The influential mechanism of the NO absorption rate was also discussed preliminarily. Furthermore, the NO absorption process by electrolyzed seawater was pseudo-first-order reaction with respect to NO concentration. A simplified equation of NO absorption rate was also obtained. The comparison results indicated that the calculated values agreed well with the experimental values.

• 出版日期2017
• 单位大连海事大学