Výsledky vyhledávání - "Jenni Alanen"

Shipping Remains a Globally Significant Source of Anthropogenic PN Emissions Even after 2020 Sulfur Regulation

Publikováno v: Kuittinen, N, Jalkanen, J-P, Alanen, J, Ntziachristos, L, Hannuniemi, H, Johansson, L, Karjalainen, P, Saukko, E, Isotalo, M, Aakko-Saksa, P, Lehtoranta, K, Keskinen, J, Simonen, P, Saarikoski, S, Asmi, E, Laurila, T, Hillamo, R, Mylläri, F, Lihavainen, H, Timonen, H & Rönkkö, T 2021, ' Shipping Remains a Globally Significant Source of Anthropogenic PN Emissions Even after 2020 Sulfur Regulation ', Environmental Science & Technology, vol. 55, no. 1, pp. 129–138 . https://doi.org/10.1021/acs.est.0c03627

Shipping is the main source of anthropogenic particle emissions in large areas of the globe, influencing climate, air quality, and human health in open seas and coast lines. Here, we determined, by laboratory and on-board measurements of ship engine

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7125ad02d513952971744ab3de73241
https://pubmed.ncbi.nlm.nih.gov/33290058

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Physical Characteristics of Particle Emissions from a Medium Speed Ship Engine Fueled with Natural Gas and Low-Sulfur Liquid Fuels

Autor: Sami Nyyssönen, Mia Isotalo, Mari Honkanen, Minna Aurela, Jenni Alanen, Pauli Simonen, Kati Lehtoranta, Hilkka Timonen, Sampsa Martikainen, Jorma Keskinen, Niina Kuittinen, Hannu Vesala, Heino Kuuluvainen, Topi Rönkkö

Publikováno v: Alanen, J, Isotalo, M, Kuittinen, N, Simonen, P, Martikainen, S, Kuuluvainen, H, Honkanen, M, Lehtoranta, K, Nyyssönen, S, Vesala, H, Timonen, H, Aurela, M, Keskinen, J & Rönkkö, T 2020, ' Physical Characteristics of Particle Emissions from a Medium Speed Ship Engine Fueled with Natural Gas and Low-Sulfur Liquid Fuels ', Environmental Science & Technology, vol. 54, no. 9, pp. 5376-5384 . https://doi.org/10.1021/acs.est.9b06460

Particle emissions from marine traffic affect significantly air quality in coastal areas and the climate. The particle emissions were studied from a 1.4 MW marine engine operating on low-sulfur fuels natural gas (NG; dual-fuel with diesel pilot), mar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91655924ad9eef63221c3641ebc4f48c
https://cris.vtt.fi/en/publications/efe52bc3-4193-4b25-9b7d-6a29fe8f1383

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Comparison of primary and secondary particle formation from natural gas engine exhaust and of their volatility characteristics

Autor: Kati Lehtoranta, Oskari Kangasniemi, Jenni Alanen, Hilkka Timonen, Erkka Saukko, Topi Rönkkö, Hannu Vesala, Sanna Saarikoski, Pauli Simonen, Timo Murtonen, Risto Hillamo, Jorma Keskinen

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 8739-8755 (2017)
Alanen, J, Simonen, P, Saarikoski, S, Timonen, H, Kangasniemi, O, Saukko, E, Hillamo, R, Lehtoranta, K, Murtonen, T, Vesala, H, Keskinen, J & Rönkkö, T 2017, ' Comparison of primary and secondary particle formation from natural gas engine exhaust and of their volatility characteristics ', Atmospheric Chemistry and Physics, vol. 17, no. 14, pp. 8739-8755 . https://doi.org/10.5194/acp-17-8739-2017

Natural gas usage in trafﬁc and energy production sector is a growing trend worldwide, thus an assessment of its effects on air quality, human health and climate is required. Engine exhaust is a source of primary particulate emissions and secondary

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::213403e9079caa2d505534e152c05fd9
https://www.atmos-chem-phys.net/17/8739/2017/acp-17-8739-2017.pdf

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Natural Gas Engine Emission Reduction by Catalysts

Autor: Satu Korhonen, Päivi Koponen, Pauli Simonen, Sanna Saarikoski, Hannu Vesala, Jenni Alanen, Topi Rönkkö, Timo Murtonen, Teuvo Maunula, Hilkka Timonen, Kati Lehtoranta, Kauko Kallinen

Publikováno v: Lehtoranta, K, Murtonen, T, Vesala, H, Koponen, P, Alanen, J, Simonen, P, Rönkkö, T, Timonen, H, Saarikoski, S, Maunula, T, Kallinen, K & Korhonen, S 2017, ' Natural Gas Engine Emission Reduction by Catalysts ', Emission Control Science and Technology, vol. 3, no. 2, pp. 142-152 . https://doi.org/10.1007/s40825-016-0057-8

In order to meet stringent emission limits, after-treatment systems are increasingly utilized in natural gas engine applications. In this work, two catalyst systems were studied in order to clarify how the catalysts affect, e.g. hydrocarbons, NO x an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee5081fac3bfa798445ba4c2b5361969
https://cris.vtt.fi/en/publications/963ca8bb-93de-47e8-bd26-a408f4c391d5

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Concentrations and Size Distributions of Particle Lung-deposited Surface Area (LDSA) in an Underground Mine

Autor: Joel Kuula, Hilkka Timonen, Anssi Arffman, Topi Rönkkö, Laura Salo, Sanna Saarikoski, Jorma Keskinen, Jenni Alanen, Kimmo Teinilä

Publikováno v: Aerosol and Air Quality Research. 21:200660

Ultrafine particles produced by diesel-powered vehicles in underground mines are largely unaccounted for in mass-based air quality metrics. The Lung Deposited Surface Area concentration (LDSA) is an alternative to describe the harmfulness of particle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8adcfd620464753a75675a2c5fe714c
https://doi.org/10.4209/aaqr.200660

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Inversely modeling homogeneous H2SO4-H2O nucleation rate in exhaust-related conditions

Autor: Miska Olin, Jenni Alanen, Marja R. T. Palmroth, Topi Rönkkö, Miikka Dal Maso

Homogeneous sulfuric acid-water nucleation rate in conditions related to vehicle exhaust was measured and modeled. The measurements were performed by evaporating pure sulfuric acid and water liquids and by diluting and cooling the sample vapor with a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::706b67be7a4290123d764caeb3e9567b
https://doi.org/10.5194/acp-2018-684

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Particle Mass and Number Emissions from Marine Engines Preparing for the Upcoming Sulphur Cap Limits

Autor: Kati Lehtoranta, Päivi Aakko-Saksa, Timo Murtonen, Hannu Vesala, Leonidas Ntziachristos, Panu Karjalainen, Topi Rönkkö, Niina Kuittinen, Jenni Alanen

Publikováno v: Lehtoranta, K, Aakko-Saksa, P, Murtonen, T, Vesala, H, Ntziachristos, L, Karjalainen, P, Rönkkö, T, Kuittinen, N & Alanen, J 2018, Particle Mass and Number Emissions from Marine Engines Preparing for the Upcoming Sulphur Cap Limits . in 22nd ETH-Conference on Combustion Generated Nanoparticles : Book of Abstracts . Nanoparticles, 22nd ETH-Conference on Combustion Generated Nanoparticles, Zurich, Switzerland, 18/06/18 . < http://www.nanoparticles.ch/2018_ETH-NPC-22/2018_ETH-NPC-22_book_of_abstracts_papers.pdf >
VTT Technical Research Centre of Finland-PURE

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ec8a89e522a8dc78f9715fe4dbd79dec
https://cris.vtt.fi/en/publications/fae3f02c-ae6f-4a81-afc5-4d0754d318a3

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The formation and physical properties of the particle emissions from a natural gas engine

Autor: Jenni Alanen, Erkka Saukko, Panu Karjalainen, Risto Hillamo, Juha Harra, Jorma Keskinen, Timo Murtonen, Topi Rönkkö, Heino Kuuluvainen, Hilkka Timonen, Kati Lehtoranta

Publikováno v: Alanen, J, Saukko, E, Lehtoranta, K, Murtonen, T, Timonen, H, Hillamo, R, Karjalainen, P, Kuuluvainen, H, Harra, J, Keskinen, J & Rönkkö, T 2015, ' The formation and physical properties of the particle emissions from a natural gas engine ', Fuel, vol. 162, pp. 155-161 . https://doi.org/10.1016/j.fuel.2015.09.003

Natural gas engine particle emissions were studied using an old gasoline engine modified to run with natural gas. The tests were steady-state tests performed on two different low loads in an engine dynamometer. Exhaust particle number concentration,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67fe34ebca12345bab06232cb0164f94
https://cris.vtt.fi/en/publications/cb626dde-a4be-43f7-ac4c-f9a3f98f06ef

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