PMID: 12782259Jun 5, 2003Paper

Investigation of the influence of humidity on the ultrasonic agglomeration of submicron particles in diesel exhausts

Ultrasonics
E Riera-Franco de SarabiaJ L Dorronsoro-Areal

Abstract

Removing very fine particles in the 0.01-1 micro m range generated in diesel combustion is important for air pollution abatement because of the impact such particles have on the environment. By forming larger particles, acoustic agglomeration of submicron particles is presented as a promising process for enhancing the efficiency of the current filtration systems for particle removal. Nevertheless, some authors have pointed out that acoustic agglomeration is much more efficient for larger particles than for smaller particles. This paper studies the effect of humidity on the acoustic agglomeration of diesel exhausts particles in the nanometer size range at 21 kHz. For the agglomeration tests, the experimental facility basically consists of a pilot scale plant with a diesel engine, an ultrasonic agglomeration chamber a dilution system, a nozzle atomizer, and an aerosol sampling and measuring station. The effect of the ultrasonic treatment, generated by a linear array of four high-power stepped-plate transducers on fumes at flow rates of 900 Nm(3)/h, was a small reduction in the number concentration of particles at the outlet of the chamber. However, the presence of humidity raised the agglomeration rate by decreasing the number pa...Continue Reading

Citations

Oct 21, 2011·Journal of Environmental Monitoring : JEM·Umesh SinghTiina Reponen
Mar 1, 2012·The Science of the Total Environment·Gi Byoung HwangGwi-Nam Bae
Aug 23, 2005·Ultrasonics Sonochemistry·Enrique RieraTimothy J Mason
Aug 25, 2006·Progress in Biophysics and Molecular Biology·Timothy J Mason
Sep 1, 2019·Journal of Hazardous Materials·Guangxue ZhangZuohe Chi

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