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A study by a pair of researchers at Northwestern University found that when fuel prices drove residents of São Paulo, Brazil, to switch from ethanol to gasoline in their flexible-fuel vehicles, local ozone levels dropped 20%. Ozone levels are relatively high in São Paulo, with hourly concentrations above 75 and 125 µg m ?3
A study by researchers at the University of Texas found that in general, use of plug-in hybrid electric vehicles (PHEVs) can lead to an increase in ozone during nighttime hours (due to decreased scavenging from both vehicles and EGU stacks) and a decrease in ozone during daytime hours.
A scatter plot of CO, as a tracer for pollution, versus CO 2 , as a tracer for the amount of combustion, for 2002 and 2010. VOCs, primarily emitted from the tailpipes of vehicles, are a key ingredient in the formation of ground-level ozone which, at high levels, can harm people’s lungs and damage crops and other plants.
A University of Utah engineer has developed an inexpensive new method to remove oil sheen by repeatedly pressurizing and depressurizing ozone gas, creating microscopic bubbles that attack the oil so it can be removed by sand filters. Emerging contaminants, such as wastewater polluted with medications and personal care products.
A study by a team of researchers from France and the US found that the origin of volatile hydrocarbons, other than methane, present in city air is mainly gasoline-powered vehicles. They therefore concluded that gasoline engines are probably the main source of volatile hydrocarbons in both cities. Borbon, A., Gilman, W. Chevaillier, A.
Environmental impacts of gasoline and E85. eutrophication; ET = ecological toxicity; FEC = fossil energy consumption; WU = water use; LO = land occupation; “The rest” includes acidification; smog formation; ozone layer depletion; and human health effects. Process flow diagrams for E85 and gasoline. GW = global warming; Eut.
The results, published in an open-access paper in the journal Science , suggest that the focus of efforts to mitigate ozone formation and toxic chemical burdens need to be adjusted, the authors suggested. Even so, lotions, paints and other products contribute about as much to air pollution as does the transportation sector.
The US Environmental Protection Agency (EPA) has determined that the systems used at gas station pumps to capture harmful gasoline vapors while refueling cars can be phased out. Since 1994, gas stations in areas that do not meet certain air quality standards have been required to use gasoline vapor recovery systems.
Renault recently made public the findings of an internal study, published first in October 2011, detailing and comparing the lifecycle assessments (LCAs) of the battery-electric and two internal combustion engined versions (gasoline and diesel) of the Renault Fluence. dCi); gasoline Fluence 16V (1.6L); and the battery-electric Fluence Z.E. (22
Researchers at the University of Colorado, Boulder and the National Renewable Energy Laboratory (NREL) modeled the emissions impact had plug-in hybrid electric vehicles (PHEVs) replaced light duty gasoline vehicles in the Denver, Colorado area in summer 2006. Ozone concentration increases were modeled for small areas near central Denver.
Researchers from the University of Minnesota have produced a spatially and temporally explicit life cycle inventory (LCI) of air pollutants from gasoline, ethanol derived from corn grain, and ethanol from corn stover for the contiguous US (the lower 48 states). The researchers included a sixth pollutant, ammonia (NH 3 ).
The staff of the California Air Resources Board (CARB) is proposing amendments to the Fill Pipes Specifications to help ensure new motor vehicle fill pipes continue to be compatible and to form a good seal with Phase II recovery nozzles that are certified for use at California gasoline stations, thereby reducing overpressure.
The US Environmental Protection Agency (EPA) is issuing a proposed rule under the Clean Air Act (CAA) that would waive requirements beginning in 2013 for systems used at gas station pumps to capture potentially harmful gasoline vapors while refueling cars. Stage I VRS apply to the gasoline distribution industry; Stage II to service stations.
has paid $422,500 in penalties for supplying gasoline and diesel fuel in violation of California regulations designed to protect air quality. million gallons of gasoline in violation of California reformulated gasoline regulations. million gallons of gasoline in violation of California reformulated gasoline regulations.
New NASA satellite images released this week demonstrate the reduction of air pollution across the US. After ten years in orbit, the Ozone Monitoring Instrument (OMI) on NASA’s Aura satellite has been in orbit sufficiently long to show that people in major US cities are breathing less nitrogen dioxide.
Research teams will also measure concentrations of exhaust pollutants in an attempt to disentangle non-tailpipe and tailpipe pollution, to better understand how each effects human health. 10 ) of urban air, a fraction known to be enriched with non-tailpipe constituents. People with asthma represent a major vulnerable group.
Since 1990, nationwide air quality has improved significantly for the six common air pollutants: ground-level ozone; particle pollution; lead; nitrogen dioxide; carbon monoxide; and sulfur dioxide, according to the US Environmental Protection Agency (EPA) report “Our Nation’s Air - Status and Trends through 2008”. annual PM 2.5
There are widespread policy assumptions that the phase-out of gasoline and diesel internal combustion engines will over time lead to much reduced emissions of Volatile Organic Compounds (VOCs) from road transport and related fuels. Cliff et al. While some VOCs are released in exhaust, others may arise from an unexpected source—e.g.,
The study found that 60% of the winter primary hydrocarbon hydroxyl radical reactivity in London is from those diesel-related hydrocarbons; the authors predicted that the longer-chain HCs contribute up to 50 % of the ozone production potential in London.
Deterioration of the ozone layer [kg CFC-11-eq.]. The program guides the interested layperson through a selection of parameters: which type of engine should be used, gasoline-burning or diesel, for example, or one powered by natural gas, a fuel cell, or a battery. Depletion of fossil energy resources [kg oil-eq.].
In the first, they found that when fuel prices drove residents of São Paulo, Brazil, to mostly switch from ethanol to gasoline in their flexible-fuel vehicles, local ozone levels dropped 20%. Officials, Geiger said, will need to weigh the increase in ozone against the decrease in nanoparticles when ethanol is used.
The US Environmental Protection Agency (EPA) is issuing an emergency fuel waiver to allow E15 gasoline to be sold during the summer driving season. The Clean Air Act (CAA) requires the use of low-volatility gasoline during the summer months in order to limit the formation of ozonepollution. Earlier post.).
Contribution of gasoline and diesel exhaust to SOA over 0% to 50% diesel fuel use. The new findings contradict previous research focused on the LA Basin which concluded that gasoline vehicles contributed more to the production of secondary organic aerosols (SOA) than exhaust from diesel vehicles. Gentner et al. Click to enlarge.
A new study quantifying emissions from a fleet of gasoline direct injection (GDI) engines and port fuel injection (PFI) engines finds that the measured decrease in CO 2 emissions from GDIs is much greater than the potential climate forcing associated with higher black carbon emissions from GDI engines. —Saliba et al.
Power management company Eaton has introduced a complete suite of solutions from its Vehicle Group to reduce vapor emissions produced during the refueling of gasoline-powered vehicles. This leakage occurs in all gasoline-powered vehicles, including passenger cars and an increasing number of small- and mid-sized commercial vehicles.
The California Air Resources Board (CARB) has released the results of a multiyear study evaluating exhaust emissions from the use of California Reformulated Gasoline (CaRFG) that contains 15 volume percent ethanol (E15). California currently limits the ethanol content of gasoline to 10 percent.
They found that levels of pollutants that can contribute to the formation of ground-level ozone, or smog, have failed to continue a fairly steady decline as estimated by the US Environmental Protection Agency. The findings have implications for air quality management. Slowdown in air quality improvement. —Zhe Jiang, lead author.
Ethanol is emitted to the atmosphere by both natural and anthropogenic processes; examples of the latter include industrial processes, biomass combustion and use as a biofuel mixed with gasoline. Acetaldehyde is classified as a hazardous air pollutants (HAP) regulated under Title III of the Clean Air Act Amendments.
The company will also extend the warranty period for certain parts in the repaired vehicles, perform projects to mitigate excess ozone-creating nitrogen oxides (NO x ) emitted from the vehicles, and implement new internal audit procedures designed to prevent future emissions cheating. million in other penalties.
Despite the progress that has been made to date, major reductions of criteria pollutant emissions in California are still required to achieve mandated State and federal ambient air quality standards, according to ARB. LEVII criteria pollutant emission standards (PC/LDT1 and LDT2). Since gasoline vehicles emit generally at or below 1.0
A new report from the National Research Council examines and, when possible, estimates, “hidden” costs of energy production and use—such as the damage air pollution imposes on human health—that are not reflected in market prices of coal, oil, other energy sources, or the electricity and gasoline produced from them. cents to about 1.7
This new undertaking will capture detailed information on pollutants from vehicle exhaust using remote-sensing equipment and portable emissions monitoring systems. The new initiatives will award each car model a score based on all of the air pollutants they release during real-world, on-road conditions.
Future blending options for ethanol in gasoline include continuation of low-level blends (E0-E15), greater use of E85 in flexible fuel vehicles (FFVs), or new use of midlevel blends (E20-E40) in FFVs or in new vehicles designed with midlevel blend-capability. —Hubbard et al.
The proposal retains the proven regulatory design of previous EPA standards for light-duty vehicles, but leverages advances in clean car technology to further reduce both climate pollution and smog- and soot-forming emissions. Criteria pollutant standards.
The program funds projects to encourage the development and use of new technologies and alternative and renewable fuels, including electricity, natural gas, biomethane, hydrogen, and gasoline and diesel substitutes, such as cellulosic ethanol (derived from woody materials, including agricultural waste), and biodiesel from waste grease.
It has been a challenge to determine how much each polluter contributes to the emission output. However, the amount of pollutant emissions that vehicles emit on a daily basis depends on numerous factors, for example on individual driving behavior. —Karl et al.
Simply put, the study found what advocates of electric transportation have long held to be true: as regards greenhouse gases and pollution generally speaking, the worst electricity is still better than petroleum. And the grid is getting cleaner and more renewable every year. billion metric tons.
Given the current blend limit of up to 15-percent ethanol in gasoline, a maximum of 19 billion gallons of ethanol can be consumed unless the number of flex-fuel vehicles increases substantially. Biofuels production has been shown to have both positive and negative effects on water quality, soil, and biodiversity.
The transition away from gasoline and diesel vehicles to electric vehicles (EVs) is going full throttle in the United States, and that includes the iconic yellow school bus. As it turns out, the very gasoline or diesel vehicles children use to go to school hamper their learning.
the criteria pollutants and CO 2 that emerge with the exhaust from the tailpipe. However, they found that the two interventions had marginal effects on air pollution, because already implemented traffic policies will reduce PM 2.5 EVs were the best alternative to diesel and gasoline vehicles across all categories. in Belgium.
Isoprene, a five-carbon diene formed naturally in plants and animals and a precursor of ozone, contributes more than 40% of these emissions. The scientists pointed out that converting the epoxides to aerosol is likely to be higher in polluted environments, because the aerosols’ acidity is generally higher when human activity is present.
ARB staff reviewed four offset protocols and recommends that they be approved as part of this regulatory package: (1) the Urban Forest Projects Protocol; (2) the US Ozone Depleting Substances Projects Protocol; (3) the Livestock Manure (Digester) Projects Protocol; and (4) the US Forest Projects Protocol. Offset Protocols.
Fiat-Chrysler of America (FCA) will recall more than 850,000 gasoline-powered passenger cars and SUVs due to a problem with their catalytic converters. NO x emissions in California are the most important contributor to ambient ozone and a key contributor to fine particulate matter pollution (PM 2.5
Jacobson used a computer model of global climate, air pollution and weather that he developed over the last 20 years and updated to include additional atmospheric processes to analyze how soot can heat clouds, snow and ice. 1990; Anisimov, 2007] and chemical production of ozone in already-polluted locations [Jacobson, 2008b].
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