Selective Catalytic Reduction Research Paper

To stop the pollutants from entering the atmosphere car manufacturers have fitted these cars with extremely effective filters but the issue with that is people tamper with them. So when a diesel can emits a dark black smoke it is most likely because the filter is broken or it's missing altogether. A down side to the filter is that it works best when it is hot so short trips around the city won’t do anything to the NOx that passes through it. Car manufacturers have been finding other ways to reduce the emissions by recirculating it back from the exhaust to the cylinder. Another thing they have been doing is injecting urea which is made of ammonia to trap the

When it comes to the environmental impact that gas and diesel engines have. It turns out that gasoline is more unstable than diesel, not because of what its base consists of, but because of the additives it contains. In addition, vehicles that use diesel tend to be more fuel-efficient and produce less greenhouse gases. Diesel is more environmentally friendly. The United States has what is considered to be the dirtiest diesel, but as of June 1, 2010 this is going to be different. U.S. diesel fuel has a lower measure of ignition quality. This means that when it is cold outside, ignition performance is poor and can result in higher emissions. This is why you see truck drivers idling their trucks all night long in cold weather rather than risk a troublesome start in the mornings. But, the sulfur in the diesel that is emitted during cold ignitions and long engine idling is still harmful to the environment because the sulfurs prevent the control of diesel particulate emissions through diesel particulate filters. This is changing, though, since new advanced technologies such as nitrogen oxide absorbers are being developed to reduce these emissions. As for gasoline, it is the non-aliphatic hydrocarbons as well as carcinogenic additives

Dane, John, and Kent J. Voorhees. "Investigation of Nitro-Organic Compounds in Diesel Engine Exhaust." National Renewable Energy Laboratory (2010). Print.

Motor vehicles are a leading source of air pollution. Even though automobile and truck engines have become far cleaner in recent decades, the sheer

Cars consist of being the number one way of travel throughout the United States. We rely on them to transport us to work, activities and necessary destinations. With this constant use of vehicles, it has had a negative impact on the environment. Although cars were invented almost a century ago to make life easier with getting around, car pollution has been our number one source of air pollution and has significantly impacted our environment due to how accessible they are. Arising problems such as air pollution, global warming, and health issues of americans, we have to come to the understanding that our environment is at risk if the amount of car pollution continues to increase.

As a result of EPA regulations, today’s diesel engines are more efficient than ever before seen in large and midsized trucks. Certain regulations restrict truck owners from using certain truck models, because of excess diesel emission. Increasing drastically as technology improves, cars and trucks produce less and less diesel exhausts and emissions. “But because diesel engines can operate for 30 years or more, millions of older, dirtier engines are still in use,” (Epa.Gov). Reducing exposure to diesel exhaust from these engines is especially important for the preservation of human health and the environment. According to the EPA, the United States Environmental Protection Agency,

A major source of air pollution in Los Angeles is diesel engines. Diesel engines are an “internal combustion engine having fuel injected into the combustion chamber near the end of the combustion stroke. The fuel is ignited by the heat of compression only” (Hoffman, 2002). Diesel fuel is created from refined crude oil. There is a three

Diesel emissions from idling trucks are a major health threat, according to the EPA, causing heart attacks and lung problems for drivers and workers, as well as young children and the elderly (“O’Leary”).

The large majority of todays cars and trucks travel by using internal combustion engines that burn fossil fuels and gasoline. A variety of emissions are polluted into the atmosphere when burning gasoline to power cars and trucks. Emissions that are released directly from cars and trucks into the atmosphere are the primary cause of car pollution but it still causes pollution the air during the manufacturing and refueling processes. Primary pollution from motor vehicles is pollution that is emitted directly into the atmosphere where as secondary pollution is caused from chemical reactions between pollutants after they have been released into the air at least 92 million Americans still live in areas with chronic smog problems. The U.S. Environmental Protection Agency predicts that by 2010, even with pollution controls more than 93 million people will live in areas that violate health standards for ozone (urban smog) and more than 55 million Americans will suffer from hazardous levels of fine particle pollution, which is especially dangerous to children and senior citizens.

Figs. 5(b) and (c) show the CO and THC emissions from the combustion of the four fuels under different BMEPs. The CO emissions from the combustion of all the four fuels decreased gradually with increasing BMEP. Under a small BMEP, the combustion temperature was generally low, and the CO emissions mainly came from the combustion in the cylinder low-temperature regions [43]; as the BMEP increased, the in-cylinder temperature increased and the CO emissions decreased. It can also be observed that CO emissions increased after the addition of n-butanol to pure diesel. This happens because n-butanol has a low cetane number and shows poor combustibility, and a larger portion of over-thin gas mixture was formed before the combustion, thus the combustion

One of the many things that are important to the economy right now is gas. The US exports and imports gas to and from countries and sometimes diesel gas and other types of gas gets spilled. The importance of this research is to see if there is a material or materials that society hasn't used yet to clean up diesel gas spills that cleans up more gas than what they use now. The impact this study could have on society is that there could be a new way to clean up diesel gas spills.

Diesel engines are able to burn much dirtier fuel and deliver more fuel energy diesel engines are the engine of choice for most industrial jobs(Blackwell). Diesels soot is un burnt fuel. The reason for the un burnt fuel is that the motor didn't have enough oxygen to mix with the fuel (Truck Trend). High output diesels use more fuel than air which produces soot. As more fuel is injected into the motor more soot is formed. The air/fuel ratio in diesel must be lean for excessive amounts of black smoke not to be formed (Truck Trend). Soot is formed when all the fuel in the cylinder is not burned (Truck Trend). Diesels that put out no smoke use less fuel than air which causes the mpg to be better (Truck Trend).

Diesel is unique in relation to consistent gas and has a tendency to show signs of improvement miles per gallon. With gas costs nowadays, utilizing diesel is resembling a really decent alternative for a great deal of car proprietors. Since the thought is turning out to be more prevalent, there is a requirement for diesel masters.

Engineering: [a] diesel engine is an internal combustion engine in which the chemical energy of fuel is transformed into thermal energy of the cylinder charge, in consequence of the self-ignition and combustion of fuel in the engine cylinder after compression of the air charge in the cylinder (p1

“Automobiles have a large impact on the quality of our environment and public health. Automobile use affects virtually every aspect of environmental quality - including noise levels, air quality, water pollution, and urban sprawl. Ninety percent of the environmental impact of automobiles occurs through the operation of the cars: about 10 percent from the production, raw materials and disposal of