ISSN 2394-5125
 


    PRIMARY AND AGGREGATE SIZE DISTRIBUTIONS OF PM IN TAIL PIPE EMISSIONS FORM DIESEL ENGINES (2022)


    KRISHNA PUTCHA,VIJAY ETTABOINA
    JCR. 2022: 846-852

    Abstract

    Particulate matter (PM) emission exhausted from diesel engine should be reduced to keep the clean air environment. PM emission was considered that it consisted of coarse and aggregate particles, and nuclei-mode particles of which diameter was less than 50 nm. However the detail characteristics about these particles of the PM were still unknown and they were needed for more physically accurate measurement and more e?ective reduction of exhaust PM emission. In this study, the size distributions of solid particles in PM emission were reported. PMs in the tail-pipe emission were sampled from three type diesel engines. Sampled PM was chemically treated to separate the solid carbon fraction from other fractions such as soluble organic fraction (SOF). The electron microscopic and optical-manual size measurement procedures were used to determine the size distribution of primary particles those were formed through coagulation process from nuclei-mode particles and consisted in aggregate particles. The centrifugal sedimentation method was applied to measure the Stokes diameter of dry-soot. Aerodynamic diameters of nano and aggregate particles were measured with scanning mobility particle sizer (SMPS). The peak aggregate diameters detected by SMPS were fallen in the same size regime as the Stokes diameter of dry-soot. Both of primary and Stokes diameters of dry-soot decreased with increases of engine speed and excess air ratio. Also, the e?ects of fuel properties and engine types on primary and aggregate particle diameters were discussed.

    Description

    » PDF

    Volume & Issue

    Volume 9 Issue-5

    Keywords