Show simple item record

dc.contributor.authorKazemimanesh, M
dc.contributor.authorRahman, MM
dc.contributor.authorDuca, D
dc.contributor.authorJohnson, TJ
dc.contributor.authorAddad, A
dc.contributor.authorGiannopoulos, G
dc.contributor.authorFocsa, C
dc.contributor.authorBoies, AM
dc.date.accessioned2021-12-15T00:31:16Z
dc.date.available2021-12-15T00:31:16Z
dc.date.issued2022
dc.identifier.issn0021-8502
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331402
dc.description.abstractCombustion-generated particles are typically non-spherical (soot aggregates) and sometimes mixed with organic compounds (e.g. in vehicle emissions). The effective density, dynamic shape factor, and volatile mixing of particles are widely studied using aerosol instruments that measure the particle mobility diameter, aerodynamic diameter, and mass. In theory, any of these three physical properties can be obtained from a combination of the other two. In the present study, a tandem arrangement of aerodynamic aerosol classifier (AAC; measuring aerodynamic diameter), differential mobility analyzer (DMA; measuring mobility diameter), optional catalytic stripper (CS), and centrifugal particle mass analyzer (CPMA; measuring particle mass) was used to study the effective density, dynamic shape factor, and volatile mixing of non-spherical non-homogenous particles. In terms of mass, the vast majority of the particles were purely semi-volatile mixed with soot with and without semi-volatile coating. The effective density of polydisperse non-stripped particles was relatively constant (indicating nearly spherical particles), while that of polydisperse stripped particles decreased from ~1200 to ~800 kg/m³ as the particle size increased (indicating a compact structure). The effective density of monodisperse particles, measured by DMA-CPMA, AAC-DMA, and AAC-CPMA methods, was consistent within the measurement uncertainty; however, the latter method had larger discrepancy with the other two methods, particularly for non-spherical particles. The dynamic shape factor, measured by AAC-CPMA and DMA-CPMA methods, increased with the mobility diameter, a trend also supported by electron micrographs. The volatile mass fraction of particles decreased as their mobility diameter increased, with smaller particles having volatile mass fraction of ~20%. This result was further confirmed by chemical characterization of size-selected particles, proving the robustness of online aerosol measurements.
dc.publisherElsevier BV
dc.rightsAll Rights Reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.titleA comparative study on effective density, shape factor, and volatile mixing of non-spherical particles using tandem aerodynamic diameter, mobility diameter, and mass measurements
dc.typeArticle
dc.publisher.departmentDepartment of Engineering
dc.date.updated2021-12-13T12:04:42Z
prism.publicationNameJournal of Aerosol Science
dc.identifier.doi10.17863/CAM.78855
dcterms.dateAccepted2021-12-10
rioxxterms.versionofrecord10.1016/j.jaerosci.2021.105930
rioxxterms.versionAM
dc.contributor.orcidKazemimanesh, M [0000-0001-7032-6960]
dc.contributor.orcidRahman, MM [0000-0002-4074-5459]
dc.contributor.orcidJohnson, TJ [0000-0002-3641-0381]
dc.contributor.orcidGiannopoulos, G [0000-0002-4741-4679]
dc.contributor.orcidFocsa, C [0000-0002-4512-1098]
dc.identifier.eissn1879-1964
dc.publisher.urlhttps://www.sciencedirect.com/science/article/pii/S0021850221006558
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Societal Challenges (724145)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/R035199/1)
pubs.funder-project-idNERC (NE/T001925/1)
cam.issuedOnline2021-12-13
cam.orpheus.successTue Feb 01 19:02:29 GMT 2022 - Embargo updated
cam.depositDate2021-12-13
pubs.licence-identifierapollo-deposit-licence-2-1
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
rioxxterms.freetoread.startdate2023-12-13


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record