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About 4 million children worldwide develop asthma each year because of inhaling nitrogen dioxide (NO 2 ) air pollution, according to an open-access study published in The Lancet Planetary Health by researchers at the George Washington University Milken Institute School of Public Health (Milken Institute SPH). —Susan Anenberg.
Contrary to expectations, exhaust from gasoline vehicles contributes more to the production of secondary organic aerosols (SOA) than exhaust from diesel vehicles, according to a new study by scientists from the Cooperative Institute for Research in Environmental Sciences (CIRES), NOAA’s Earth System Research Laboratory (ESRL) and other colleagues.
Under laboratory-simulated diesel exhaust conditions, this mixed-phase oxide material was superior to Pt in terms of cost, thermal durability, and catalytic activity for NO oxidation. Mullite is not only easier to produce than platinum, but also better at reducing pollution in diesel engines. Kyeongjae Cho.
The selected 17 awards represent the best of nearly 1,000 ideas submitted for the FY 2012/13 Broad Based Topic Solicitation, DOE said. Hybrid Electric Turbocharger for Exhaust Energy Recovery and Transient Lag Reduction. A Novel Exhaust after Treatment Catalyst. Lead organization. Description. Mainstream Engineering Corp.
They found that the level of emissions of regulated and unregulated pollutants in diesel exhaust depends on fuel, load, engine calibration, and exhaust aftertreatment technology. Unregulated pollutants also include ozone precursors and bioaccumulative and toxic compounds. L) and medium-duty (6.4 —Chin et al.
The transient results illustrate the gradual formation of the nucleation mode particles with continuous increase in exhaust temperatures. Diesel particulate filters (DPF) and urea-based selective catalytic reduction (SCR) exhaust after-treatment systems thus have emerged as feasible strategies to meet the 2010 USEPA regulations.
Renault is introducing three new Energy engines ( earlier post ) in its Mégane Collection 2012: the new turbocharged, gasoline direct-injection Energy TCE 115 di; the Energy dCi 130; and the Energy dCi 110, with NEDC fuel consumption of 3.5 Versions of Mégane Collection 2012 powered by this engine consume 5.3 Click to enlarge.
A new Low Emissions Package that qualifies the 2012 Chevrolet Volt to access California’s High Occupancy Vehicle traffic lanes will be standard on all models sold in the Golden State early next year. The additional oxygen helps the catalytic converter remove even more pollutants. Earlier post.).
Replacing all of the oldest, highly polluting school buses in the US could lead to 1.3 The suspected cause of these preventable absences is exposure to high levels of diesel exhaust fumes, which can leak into school bus cabins or enter buses through open windows. On average, they found that districts with upgraded buses had a 0.06
Engineers focused on improving thermal efficiency and reducing friction of the engine’s internal moving parts, especially during warm-up—the time when an engine emits higher levels of CO 2 and other pollutants. An exhaust manifold cast into the cylinder head. The one-piece assembly lowers the temperature of the exhaust gases.
The claim that emissions from diesel engine exhausts from road transport are the main cause of lung cancer in humans thus “ needs to be seriously challenged, ” the paper concluded. —“Diesel Engines Exhausts: Myths and Realities”. The amount of diesel exhaust people are exposed to varies greatly. tuning should be warranted.
It, or a scaled-up version, could also provide a solution for the Asian motor vehicle fleet, in which two-stroke engine vehicles constitute a major share—and contribute significantly to air pollution. Everything else—pistons, porting and crankcase, bearings, exhaust, etc.—were Lubrication proved to be an issue.
Non-exhaust traffic sources of particles. However, traffic-related non-exhaust particles remain largely unchanged, making these emissions increasingly significant contributors to the environmental burden. These non-exhaust vehicle sources include: brake lining, tire and road-surface wear, and resuspension of road dust.
Battery electric cars emit less greenhouse gases and air pollutants over their entire life cycle than petrol and diesel cars, according to a European Environment Agency (EEA) report. For local air quality, electric vehicles also offer clear benefits, mainly due to zero exhaust emissions at street level.
Contribution of gasoline and diesel exhaust to SOA over 0% to 50% diesel fuel use. The study determined that, depending on a region’s fuel use, diesel exhaust is responsible for 65% to 90% of vehicular-derived SOA, with substantial contributions from aromatic and aliphatic hydrocarbons. Gentner et al. Click to enlarge. Earlier post.).
The US Environmental Protection Agency (EPA) has issued a Request for Proposals ( EPA-OAR-OTAQ-12-05 ) with up to $20 million in FY 2012 grant funding to establish clean diesel projects aimed at reducing pollution from the existing fleet of diesel engines. vehicle with a new eligible verified exhaust control technology.
The buses consume up to 50% less fuel and reduce exhaust emissions by the same amount. The buses add significantly to air pollution and have high fuel costs. The bus operates more efficiently, emits less exhaust and is quieter because the diesel engine does not rev up during acceleration.
The first study to conduct a comprehensive evaluation of lifetime exposure to new technology diesel exhaust (NTDE)—i.e., exhaust from heavy-duty diesel engines meeting EPA 2007 and later emissions requirements—has found no evidence of carcinogenic lung tumors. This phase was conducted at SwRI in 2012. Earlier post.)
The US Environmental Protection Agency (EPA) released the Second Integrated Urban Air Toxics Report to Congress—the final of two reports required under the Clean Air Act (CAA) to inform Congress of progress in reducing public health risks from urban air toxics (also referred to as hazardous air pollutants or HAPs).
Maritime traffic on the world’s oceans has increased four-fold over the past 20 years, likely causing more water, air and noise pollution on the open seas, according to a new study quantifying global ship traffic. The research used satellite altimeter data to estimate the number of vessels on the ocean every year between 1992 and 2012.
Although modern catalytic converters significantly reduce pollution from automobile engines, a major amount of pollutants is still emitted just after “cold-start”, that is, until the catalytic converter warms up to its “ignition” temperature, at which the reaction rate rapidly switches from low to high conversion. Resources.
However, the impact of these changes in HDDV exhaust emissions on ambient atmospheric pollutant concentrations and, more importantly, on human health outcomes across Canada have not been evaluated. the 2008-2012 global recession). These changes would likely be well below any possible verification by ambient monitoring.
While properly engineered conversion systems can reduce or at least not increase emissions, poorly designed systems can lead to much more pollution. MY 2010, 2011, 2012 and < useful life mileage. Exhaust, Evap, and OBD testing. Exhaust and Evap testing + OBD scan tool test and attestation. Certification application.
The Directorate for Engineering is now seeking proposals (NSF 12-559) for awards totalling up to $12 million for FY 2012, 2013, and 2014, pending availability of funds. Liquid fuels have dominated transportation systems for over a century and will continue to do so for decades to come.
Issues covered in the briefing include emissions, air pollution, noise and renewable energy and the impact of transport on ecosystems and biodiversity. Monitoring of CO 2 emissions from new vans started in 2012. decrease from 2012 levels. Air pollution. In 2016, average emissions decreased by 1.5 g CO 2 /km, a 9.2%
Using a single-cylinder, wall-guided, spark ignition direct injection engine, the NREL team independently swept SOI (start of ignition), spark timing fuel injection pressure, intake cam phasing, exhaust cam phasing, and fuel?air PN emissions at high loads are insensitive to spark timing, intake cam phasing, and exhaust cam phasing.
Long Beach Transit (LBT) recently received a $600,000 grant from the Mobile Source Air Pollution Reduction Review Committee (MSRC) of the South Coast Air Quality Management District Near Zero Incentive Program for the purchase of 40 Cummins “near-zero” compressed natural gas (CNG) engines. In 2012, LBT purchased its first CNG buses.
Stuart Grange works in Empa’s Air Pollution/Environmental Technology Laboratory and also at the Wolfson Atmospheric Chemistry Laboratories at the University of York. Together with his colleagues, he used a special instrument to examine the exhaust plumes of 23,000 passing cars and analyzed the levels of NO x and CO 2.
Emerging technologies and pollutants of concern. HEI is a nonprofit corporation chartered in 1980 as an independent research organization to provide high-quality, impartial, and relevant science on the health effects of air pollution. The Panel’s report is expected to be completed by early 2012. Source: HEI. Click to enlarge.
The latest evolutions will become available in 2012 and will cut CO 2 emissions by approximately 20 g/km. Scheduled for launch in 2012, it is expected to account for 85% of Renault’s gasoline engine sales in 2015. Low pressure EGR (exhaust gas recirculation). Lower pressure EGR (exhaust gas recirculation). liter engine.
However, only a small fraction of SOA formed during photo-oxidation of dilute LDGV exhaust in a smog chamber is explained by single-ring aromatic compounds. The relationships between IVOCs and other pollutants were examined to develop methods for estimating IVOC emissions from existing data. Gordon et al. —Zhao et al.
LanzaTech’s gas fermentation technology ( earlier post ) is at the core of the new Horizon2020 Steelanol project (2015-2018), which seeks to produce bioethanol via an innovative gas fermentation process using exhaust gases emitted by the steel industry. million (US$16.3-million) Earlier post.) Gases from steelmaking have been a major focus.
While technologies for low carbon buses such as hybridization offer the prospect of significant reductions in fuel consumption and CO 2 emissions compared to conventionally powered vehicles, the improvement in terms of regulated emissions (criteria pollutants) may not be as great, according to a new report by Ricardo. Resources.
FCA and Cummins allegedly knew about the washcoat defect for years—at least as early as 2014—but failed to take action to mitigate the drop in the trucks’ performance or prevent the illegally high levels of pollution emitted by affected RAM trucks. L Cummins diesel engine to see if they might be entitled to compensation.
Up to a reference mass of 2380 kg, the complete vehicle has its emission characteristics tested on a chassis dynamometer, with the result being shown in pollutants per km. Above a reference mass of 2840 kg, the engine is tested on an engine dynamometer, with the result being indicated in pollutant emissions per kW of output.
Freescale Semiconductor announced the first of several powerful multicore automotive MCUs that help automotive designers improve engine efficiency and reduce exhaustpollution. Freescale plans to offer evaluation kits and samples of the MPC5676R MCU in January 2012. Click to enlarge.
The California Air Resources Board (ARB or Board) will conduct a public hearing on 15 November in Sacramento to consider adopting amendments to the Low-Emission Vehicle (LEV III) greenhouse gas emissions standards, and additional minor revisions to the LEV III criteria pollutant and Zero-Emission Vehicle (ZEV) regulations, approved by the.
Tuesday 10 July, 2012. Oops the UK is in trouble again over its air pollution and the EU supernanny isn’t prepared to take anymore of our delay-tactic shenanigans this time, rejecting calls for more time to comply with legal limits set for exhaust gases, and the renewed threat of legal action [.]. The Green Piece Column.
Further work to ensure effective implementation of the 2020 global sulfur cap will continue in the Sub-Committee on Pollution Prevention and Response (PPR). Regulations governing sulfur oxide emissions from ships are included in Annex VI to the International Convention for the prevention of Pollution from ships (MARPOL Convention).
A study by a team from the California Air Resources Board (ARB) has found that the collective cancer risk from exposure to seven toxic air contaminant (TACs) has declined 76% during the period from 1990 to 2012, and linked that result from air quality regulations targeting these TACs. Estimating DPM.
The top set of recommendations call for: Replacing existing switch and medium horsepower locomotives with cleaner locomotives (2010-2013); Retrofitting switch and medium horsepower locomotive with particulate matter and oxides of nitrogen (NO x ) after-treatment devices (2012-2016); and. NO x helps create ground-level ozone, or smog.
In 2018, the Government will publish a comprehensive Clean Air Strategy which will address other sources of air pollution. Air quality in the UK has been improving significantly in recent decades, with reductions in emissions of all of the key pollutants, and NO 2 levels down by half in the last 15 years.
In some catalytic zeolites, the metal ions can break down the pollutant nitric oxide in vehicle emissions. 2012) Cu-SSZ-13 Catalysts for the Selective Catalytic Reduction of NO x with NH 3 : Catalyst Characterization and Reaction Mechanisms (12 AIChE meeting). However, the zeolites crumble and clog easily, leading to early failure.
There is no need for Exhaust Gas Recirculation, EGR cooler, and EGR valve, Saxman said. have suggested that NO x emissions from DME-fueled engines could meet future regulations with high exhaust gas recirculation in combination with a lean NO x trap.]. Although others (Arcoumanis et al. Fleisch, A. 2012.05.012.
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