A5069256045- Vehicle emissions and performance
- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Maritime Transport Emissions and Efficiency
- Catalytic Processes in Materials Science
- Advanced Combustion Engine Technologies
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Oil, Gas, and Environmental Issues
- Earthquake Detection and Analysis
- Advanced Aircraft Design and Technologies
- Rocket and propulsion systems research
- Traffic Prediction and Management Techniques
- Environmental Policies and Emissions
- Biodiesel Production and Applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Power Generation Technologies
- Healthcare Systems and Challenges
- Energy, Environment, and Transportation Policies
- Environmental and Industrial Safety
- Risk and Safety Analysis
- Clinical Nutrition and Gastroenterology
- Engine and Fuel Emissions
- Fire dynamics and safety research
Tampere University
2016-2024
Tampere University of Applied Sciences
2016-2018
Finnish Meteorological Institute
2017
Abstract Intense and frequent new particle formation (NPF) events have been observed in polluted urban environments, yet the dominant mechanisms are still under debate. To understand key species governing processes of NPF we conducted comprehensive measurements downtown Beijing during January–March, 2018. We performed detailed analyses on sulfuric acid cluster composition budget, as well chemical physical properties oxidized organic molecules (OOMs). Our results demonstrate that fast...
Abstract. Changes in vehicle emission reduction technologies significantly affect traffic-related emissions urban areas. In many densely populated areas the amount of traffic is increasing, keeping level high or even increasing. To understand health effects emissions, both primary (direct) particulate and secondary particle formation (from gaseous precursors exhaust emissions) need to be characterized. this study, we used a comprehensive set measurements characterize Euro 5 gasoline...
Abstract. The effect of fuel ethanol content (10, 85 and 100 %) on primary emissions subsequent secondary aerosol formation was investigated for a Euro 5 flex-fuel gasoline vehicle. Emissions were characterized during New European Driving Cycle (NEDC) using comprehensive set-up high time-resolution instruments. A detailed chemical composition the exhaust particulate matter (PM) studied soot particle mass spectrometer (SP-AMS), potential (PAM) chamber. For gaseous compounds, an increase in...
Emissions from passenger cars are one of major sources that deteriorate urban air quality. This study presents characterization real-drive emissions three Euro 6 emission level (two gasoline and diesel) in terms fresh particles secondary aerosol formation. The vehicles were also characterized by chassis dynamometer studies. In the study, particle number during regular driving 1.1-12.7 times greater than observed laboratory tests (4.8 on average), which may be caused more effective nucleation...
Shipping is the main source of anthropogenic particle emissions in large areas globe, influencing climate, air quality, and human health open seas coast lines. Here, we determined, by laboratory on-board measurements ship engine exhaust, fuel-specific number (PN) for different fuels desulfurization applied shipping. The emission factors were compared to exhaust plume observations and, furthermore, exploited assessment global PN from shipping, utilizing STEAM model. results indicate that most...
Abstract. Oxidation flow reactors (OFRs) or environmental chambers can be used to estimate secondary aerosol formation potential of different emission sources. Emissions from anthropogenic sources, such as vehicles, often vary on short timescales. For example, identify the vehicle driving conditions that lead high emissions, rapid oxidation exhaust is needed. However, residence times in and most are too long study these transient effects ( ∼ 100 s several hours chambers). Here, we present a...
Exhaust emissions from traffic significantly affect urban air quality. In this study, in-traffic of diesel-fueled city buses meeting enhanced environmentally friendly vehicle (EEV) and Euro VI emission limits the effects retrofitting EEV were studied on-road by chasing with a mobile laboratory in Helsinki region, Finland. The average factors particle number (PN), mass (PM1) black carbon (BC) 0.86·1015 1/kgfuel, 0.20 g/kgfuel 0.10 g/kgfuel, respectively, for buses. For buses, below 0.5·1015...
Particle emissions from marine traffic affect significantly air quality in coastal areas and the climate. The particle were studied a 1.4 MW engine operating on low-sulfur fuels natural gas (NG; dual-fuel with diesel pilot), oil (MGO) (MDO). emitted particles characterized respect to number (PN) emission factors, PN size distribution down nanometer scale (1.2–414 nm), volatility, electric charge, morphology, elemental composition. of fresh exhaust was bimodal for all fuels, nucleation mode...
This study reports high numbers of exhaust emissions particles during engine motoring. Such were observed in the two heavy duty vehicles with no diesel particle filter (DPF), driven on speed ramp tests and transient cycles. A significant fraction these was nonvolatile nature. The number-weighted size distribution peak below 10 nm when a thermodenuder used to remove semivolatile material, growing up 40 after species condensation. These found contribute 9–13% total number emitted over complete...
The use of fossil fuels in traffic is a significant source air pollutants and greenhouse gases rapidly growing densely populated cities. Diesel exhaust emissions including particle number concentration size distribution along with the particles' chemical composition NOx were investigated from Euro 4 passenger car comprehensive set high time-resolution instruments. compared three fuel standards – European diesel (EN590), Indian (BS IV) Finnish renewable (Neste MY) over New Driving Cycle...
Abstract. Fuel-operated auxiliary heaters (AH) are potentially significant additional sources of particle and gas phase pollution from vehicles, but information on their emissions is scarce. Especially understanding AH exhaust−originated secondary aerosol formation lacking. In this study, we measured the emissions, including diesel- gasoline-operated AHs used in passenger cars. Investigation revealed importance peak during start shutdown events differences between gasoline diesel fuelled...
Particle emissions and secondary aerosol formation from internal combustion engines deteriorate air quality significantly affect human wellbeing health. Both the direct particle of compounds contributing to depend on choices made in selecting fuels, engine technologies, exhaust aftertreatment (EAT). Here we study how catalytic EATs, filtration, fuel these concerning heavy-duty diesel engine. We observed that most advanced EAT decreased fresh mass as much 98% (from 44.7 0.73 mg/kWh) aged...
The performance of a thermal denuder (thermodenuder—TD) and fresh catalytic stripper (CS) was assessed by sampling laboratory aerosol, produced different combinations sulfuric acid, octacosane, soot particles, marine exhaust aerosol medium-speed engine using high sulfur fuels. intention to study the efficiency in separating non-volatile particles. No particles could be detected downstream either device when challenged with neat octacosane at concentration. Both measurements showed that...
Recent recommendations given by WHO include systematic measurements of ambient particle number concentration and black carbon (BC) concentrations. In India several other highly polluted areas, the air quality problems are severe need for related information is urgent. This study focuses on emissions BC passenger cars that technologically relevant from an Indian perspective. Particle were investigated under real-world conditions driving cycles typical urban environments. Two mobile...
Abstract. Natural gas usage in the traffic and energy production sectors is a growing trend worldwide; thus, an assessment of its effects on air quality, human health climate required. Engine exhaust source primary particulate emissions secondary aerosol precursors, which both contribute to quality can cause adverse effects. Technologies, such as cleaner engines or fuels, that produce less aerosols could potentially significantly decrease atmospheric particle concentrations their In this...
In households, municipal solid waste (MSW) is often burned along with wood to get rid of waste, help in ignition or simply reduce fuel costs. The aim this study was characterize the influence household combustion, wood, on physical and chemical properties particulate emissions a flue gas masonry heater. MSW burning alongside increased average matter (PM) mass (65%), lung deposited surface areas (LDSA, 15%), black carbon (BC, 65%) concentrations particle size gas. smaller during phases, but...
Among various Hybrid Electric Vehicles (HEVs), Plug-in (PHEVs) charged from the grid are seen as most advanced ones, they can drive dozens of kilometers using only electric engine and thus producing less tailpipe greenhouse gas emissions than vehicles with internal combustion engines or other HEVs. The proportion PHEVs among all is still relatively low but increasing rapidly in many countries. However, real-world these novel hybrid technologies not straightforward to estimate. This study...
Abstract. Oxidation flow reactors or environmental chambers can be used to estimate secondary aerosol formation potential of different emission sources. Emissions from anthropogenic sources, such as vehicles, often vary on short timescales. For example, identify the vehicle driving conditions that lead high emissions, rapid oxidation exhaust is needed. However, residence times in and most are too long study these transient effects. Here, we present a new reactor, TSAR (TUT Secondary Aerosol...
Current legislations typically characterize systems of aerosols, such as from vehicle exhaust, primarily by number concentration and size distributions. While potential health threats have a dependence on the particle size, chemical composition particles, including volatile semi-volatile components adsorbed onto nonvolatile cores present at roadside urban settings, is important in understanding impact exhaust particles health. To date, only tools suitable for an online in-depth aerosol...
Since gas engines are considered a future solution to improve air quality and mitigate climate impacts, there is an urgent need understand their emissions. The aim for this study was the phenomena affecting formation of particulate emissions non-road natural engine. To achieve this, engine's exhaust were characterized under different operating conditions. regulated pollutants (gaseous CO, HC, NOx; matter (PM) particle number (PN)) determined experimentally detailed characterization over wide...