title: Removal of black carbon particles from experimental flue gas by surfactant solution in a new type of umbrella plate scrubber.
abstract: Black carbon (BC) particles were removed from experimental flue gas by the surfactant solutions of sodium dodecylbenzene sulfonate (SDBS), hexadecyl trimethyl ammonium bromide (CTAB), fatty alcohol polyoxyethylene ether-9 (AEO-9) and polyoxy ethrlene nonyl phinyl ether-10 (TX-10), as well as AEO-9-SDBS, AEO-9-CTAB and SDBS-CTAB, in a new type of umbrella plate scrubber. Among the four independent surfactants, AEO-9 has the lowest surface tension, 35.9 mN/m, which resulted in the highest BC removal ratio among the alone surfactants. The experimental conditions were as follows: dust concentration = 3000 mg/m3; gas velocity = 14 m/s; liquid-gas ratio = 0.80 l/m3; and gas flow = 400 m3/h. When the mole ratio of the mixed surfactants was 1:1, the lowest surface tension could be detected among the studied mixed surfactants. According to the molecular interaction parameters (beta) and the mole ratio of surfactant 1 in the mixture (x1), the synergistic effects of AEO-9-SDBS and SDBS-CTAB solutions were obviously higher than those of AEO-9-TX-10 and AEO-9-CTAB. Therefore, AEO-9-SDBS solution had the lowest surface tension among the mixtures due to its beta < 0 and x1 = 0.85. The mixture solution of AEO-9-SDBS (1:1 mole ratio, 0.2 mmol/l) yielded the highest BC removal ratio, about 99.8%, and it was about 12% higher than that of only water, which was about 87.9%. The calculated critical micelle concentration was almost the same as that of the experimental concentration when the related equation was corrected by beta.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha, China.
authors.forename: Pei
authors.initials: P
authors.lastname: Lu
authors.forename: Caiting
authors.initials: C
authors.lastname: Li
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
authors.forename: Yapei
authors.initials: Y
authors.lastname: Zhao
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhan
authors.forename: Jingke
authors.initials: J
authors.lastname: Song
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Fan
mesh_terms: D000397:Air Pollution / Q000517:prevention & control*; D002244:Carbon / Q000737:chemistry / Q000302:isolation & purification; D008956:Models, Chemical; D012906:Smoke; D053260:Soot / Q000737:chemistry / Q000302:isolation & purification*; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D012906:Smoke; D053260:Soot; D013501:Surface-Active Agents; D002244:Carbon