PMID- 38278878
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240129
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 14
IP  - 1
DP  - 2024 Jan 26
TI  - The investigation of diesel soot emission using instrument combination of 
      multi-wavelength photoacoustic spectroscopy and scanning mobility particle sizer.
PG  - 2254
LID - 10.1038/s41598-024-52832-8 [doi]
LID - 2254
AB  - The parallel measurements of wavelength dependent optical absorption, particle 
      number size distribution have made by a multi wavelength photoacoustic 
      spectrometer (4lambda-PAS) and scanning mobility particle sizer (SMPS) respectively at 
      different modes of a diesel engine using two different types of fuel. The thermal 
      evolution of the emission was also investigated using posterior temperature 
      treatment of emission. The bimodal size distribution of emitted particles at a 
      set reference temperature has been observed regardless of the applied fuel at 
      idle. However, the emitted particulate assembly had lognormal size distribution 
      falls into the accumulation mode at all other defined engine modes and both fuel 
      types. The total number- and volume concentration (TNC and TVC) showed retrograde 
      tendency with the increasing torque and rpm independently of the applied fuel 
      types. The TNC values decreased up to 50% for both fuels with engine operation 
      changes from idle engine mode(em#1) to low engine mode(em#2). With further 
      increase in torque and rpm of engine, the change in TNC is negligible. On the 
      other hand, the TVC remains more or less the same for idle to low engine mode 
      transition and increased more than 60% for high mode (em#3) transition. The 
      Optical Absorption Coefficient (OAC) values measured at the operational 
      wavelengths of the 4lambda-PAS instrument decreased at all wavelengths with increasing 
      rpm and torque. The wavelength dependency quantified by Aerosol Angstrom Exponent 
      (AAE) was applied here for qualitative analysis of the carbonaceous emission and 
      showed decreased values towards the higher engine speed and torque output of the 
      engine. The proposed technique can be used as real-time, precise and accurate 
      measurement of light absorption by DPM aerosols, which opens up novel 
      possibilities for the volatility and thermal evolution investigation of diesel 
      emissions.
CI  - (c) 2024. The Author(s).
FAU - Ajtai, Tibor
AU  - Ajtai T
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary.
AD  - HUN-REN-SZTE Research Group for Photoacoustic Monitoring of Environmental 
      Processes, Dom ter 9, Szeged, 6720, Hungary.
FAU - Utry, Noemi
AU  - Utry N
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary.
FAU - Pinter, Mate
AU  - Pinter M
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary.
FAU - Rahman, Abdul
AU  - Rahman A
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary. rahman.abdul@szte.hu.
FAU - Kurilla, Boldizsar
AU  - Kurilla B
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary.
FAU - Sarossy, Gabor
AU  - Sarossy G
AD  - MOL Ltd. Duna Refinery, Szazhalombatta, 2440, Hungary.
FAU - Deak, Laszlo
AU  - Deak L
AD  - MOL Ltd. Duna Refinery, Szazhalombatta, 2440, Hungary.
FAU - Baladincz, Jeno
AU  - Baladincz J
AD  - MOL Ltd. Duna Refinery, Szazhalombatta, 2440, Hungary.
FAU - Raffai, Peter
AU  - Raffai P
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary.
FAU - Szabo, Gabor
AU  - Szabo G
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary.
FAU - Bozoki, Zoltan
AU  - Bozoki Z
AD  - Department of Optics and Quantum Electronics, University of Szeged, 9. Dom 
      Square, Szeged, 6720, Hungary.
AD  - HUN-REN-SZTE Research Group for Photoacoustic Monitoring of Environmental 
      Processes, Dom ter 9, Szeged, 6720, Hungary.
LA  - eng
PT  - Journal Article
DEP - 20240126
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
SB  - IM
PMC - PMC10817988
COIS- The authors declare no competing interests.
EDAT- 2024/01/27 12:42
MHDA- 2024/01/27 12:43
PMCR- 2024/01/26
CRDT- 2024/01/26 23:20
PHST- 2023/12/14 00:00 [received]
PHST- 2024/01/24 00:00 [accepted]
PHST- 2024/01/27 12:43 [medline]
PHST- 2024/01/27 12:42 [pubmed]
PHST- 2024/01/26 23:20 [entrez]
PHST- 2024/01/26 00:00 [pmc-release]
AID - 10.1038/s41598-024-52832-8 [pii]
AID - 52832 [pii]
AID - 10.1038/s41598-024-52832-8 [doi]
PST - epublish
SO  - Sci Rep. 2024 Jan 26;14(1):2254. doi: 10.1038/s41598-024-52832-8.