Alternative Fuels for Automobiles

Alternative burn down, in each case known as non- customary provokes, is any(prenominal) material or nerve centre that quarter be white plagued as a furnish, other than fossil fuels. Alternative fuels, as delimitate by the slide fastener Policy Act of 1992 (EPAct), include ethyl alcohol, born(p) ordnance, propane, atomic number 1, bio diesel engine engine motor, galvanicity, methanol, and p-series fuels. Using these alternate fuels in fomites cornerstone generall(a)y reduce harmful pollutants and exhaust emissions.Alternative fuels atomic number 18 designed to be cheap, non-polluting, infinite sources of zip fastener. No such fuels shortly exist globally, or they would by now be rapidly replacing current fossil fuels. In the year 2000, there were about eight trillion vehicles around the world that ran on alternative fuels. A primary concern is that the fact that the habit of conventional fuels directly contributes to the global warming crisis.A nonher concern is the business of peak oil, which predicts a rising cost of oil derived fuels ca utilise by severe shortages of oil during an era of ripening heartiness consumption. According to the peak oil phenomenon, the demand for oil bequeath exceed supply and this gap bequeath continue to grow, which could ca utilise a growing energy crisis by the year 2010 or 2020. Most of the evoke in alternative fuels has focused on transportation vehicles, since this application represents 70% of petroleum consumption.The President also proposes accele dimensionn of the breeding of domestic, renewable alternatives to gasconadeoline and diesel fuels through $150 million for the Biofuels Initiativea $59 million increase over FY 2006to help develop bio-based transportation fuels such as cellulosic ethanol from agricultural waste products, such as wood chips, stalks, or switch grass $31 million to speed the development of advanced battery technology to extend the endure of crossbreeding vehicles a nd make practicable plug-in hybrids and electric carsa 27 percent increase over FY 2006 and $289 million for the Presidents enthalpy supply Initiative.President Bush outlined the Advanced Energy Initiative (AEI) in pursuit of a field of study goal of replacing much than 75 percent of U. S. oil imports from the Middle East by 2025. Since 2001, intimately $10 billion has been invested by the Federal government to develop pristine, cheaper and more reliable alternative energy sources. 1. ETHANOL Ethanol prat run at a much higher compression ratio without octane-boosting analogues. It burns more completely because ethanol molecules contain atomic number 8 carbon monoxide emissions can be 80-90% subvert than for fossil-fuelled engines.(Hua Lu Karlsson. 2006). However, ethanol is degrading to nigh plastic or rubber split of fuel rake systems designed to use petrol, and has 37% little energy per litre than petrol . There has been a new-fashioned revival in interest in the us e of ethanol-diesel fuel conk outs(E-diesel) in heavy-duty vehicles as a means to reduce petroleum dependency, increase renewable fuels use, and reduce vehicle emissions. The major concern with the use of E-diesel derives from its flammability characteristics.E-diesel blends containing 10% to 15% ethanol have the vaporization pressure and flammability limits of ethanol. This means that ethanol concentrations in enclose spaces such as fuel retentiveness and vehicle fuel tanks argon flammable over the temperature range of 13 to 42C, typical ambient temperatures. Thus, there argon change magnitude risks of fire and explosion compared to diesel fuel, or even gasoline. Other vehicle performance-related concerns have also been raised.These include decreased maximum power, increased incidence of fuel pump vapor lock, and reduced fuel pump and fuel injector life receivable to the decreased lubricity of ethanol. Ethanol can be blended directly in petrol, up to a change integrity of 20 %, without engine modifications, though engines would need to be modified for higher blends. Ethanol blended diesel fuels (10 to 15% ethanol) require emulsifiers and solubilisers, depending on the ethanol quality. For use of pure ethanol in diesel engines an additive (ignition improver) is needed for cold start and idling. Fuel pump adaptations may also be necessary.Barriers to the use of ethanol in diesel fuel include limited miscibility at lower temperatures and need for minor variations in fuel delivery systems to account for the different physical properties of ethanol as compared to diesel. ( K. R. Gerdes and G. J. Suppe , 2001). An increase in fuel consumption approximately equivalent to the reduction in energy content of the fuel can be expected when using ethanol-diesel blends. With ethanol percentages of 10%or slight, operators have reported no noticeable differences in performance compared to running on diesel fuel. ( Hansen et al.,2001). The use of E diesel is the affect of the ethanol on the lubricating properties of the fuel and the potential for fuel system wear. Additive packages that are used to formulate E diesel fuels can improve fuel lubricity and prevent abnormal fuel system wear. E 85 The heavy promoted alcohol fuel called E85 might cut Americas oil use and help support U. S. agriculture, but its not reducing motorists fuel bills. E85 is a blend of 85% ethanol and 15% leadless gasoline for use in flexible fuel vehicles (FFVs). E85 is classified as an alternative fuel by the U.S. Department of Energy. A flexible fuel vehicle (FFV) is a vehicle that can operate on any blend of ethanol up to 85%. If E85 is not available, the vehicle can operate on straight unleaded gasoline or any percentage of ethanol up to 85%. It has the highest oxygen content of any fuel available today, allowing it to burn more completely ( cleanly) than conventional gasoline. E85 contains 80% less gum-forming compounds, like the olefins engraft in gasoline. Productio n and use of E85 results in a nearly 30% reduction in glasshouse gas emissions. 2.METHANOL Methanol, also known as wood alcohol, can be used as an alternative fuel in flexible fuel vehicles that run on M85 (a blend of 85% methanol and 15% gasoline). However, it is not commonly used because automakers are no longer supplying methanol-powered vehicles. Methanol is even more corrosive and its energy per liter is 55% lower than that of petrol. Methanol can be used in internal flame engines with minor modifications. It usually is made from natural gas, sometimes from coal, and could be made from any carbon source including CO2.The ability to produce methanol from non-petroleum feedstocks such as coal or biomass is of interest for reducing petroleum imports. Methanol can be used to make methyl tertiary-butyl ether (MTBE), an air which is blended with gasoline to enhance octane and create cleaner burning fuel. MTBE production and use has declined because it has been found to defile gro und water. Methanol produces a high amount of formaldehyde in emissions. In the future, methanol could mayhap be the fuel of choice for providing the henry necessary to power fuel cell vehicles.3. PROPANE (LPG) Propane or liquid petroleum gas (LPG) is also fast becoming a popular alternative fuel. It is a by-product of natural gas processing and crude oil refining. Propanol and butanol are considerably less toxic and less volatile than methanol. In particular, butanol has a high flashpoint of 35 C, which is a benefit for fire safety. The fermentation processes to produce propanol and butanol from cellulose are fairly tricky to execute, and the Weizmann beingness (Clostridium acetobutylicum) currently used to perform these conversions.Propane vehicles can produce fewer ozone-forming emissions than vehicles powered by reformulated gasoline. There is 98% reduction in the emissions of toxics, including benzene, 1,3 butadiene, formaldehyde, and acetaldehyde, when the vehicles were run ning on propane rather than gasoline. The cost of a gasoline-gallon equivalent of propane is generally less than that of gasoline, so driving a propane vehicle can save money. In addition, propane is the most accessible of all alternative fuels. 4. NATUAL GAS (CNG/LNG)Natural gas in the form of compressed natural gas (CNG) or liquefy natural gas (LNG) is fast becoming one of the most popular alternative fuels. Natural gas contains hydrocarbons such as ethane and propane and other gases such as nitrogen, helium, carbon dioxide, enthalpy sulfide, and water vapor and is produced either from gas wells or in conjunction with crude oil production. Natural gas pollutes much less than gasoline and very little has to be done to modify an internal conflagration engine. It is also clean burning and produces significantly fewer harmful emissions than reformulated gasoline or diesel when used in natural gas vehicles.Smog-producing gases, such as carbon monoxide and nitrogen oxides, are reduced by more than 90% and 60%, respectively and carbon dioxide, a greenhouse gas, is reduced by 30%-40%. Natural gas can either be stored onboard a vehicle as compressed natural gas (CNG) at 3,000 or 3,600 psi or as liquified natural gas (LNG) at typically 20-150 psi. Natural gas can also be blended with hydrogen. 5. HYDROGEN Hydrogen (H2) will play an important role in developing sustainable transportation, because in the future it may be produced in virtually unlimited quantities using renewable resources.Hydrogen has been used effectively in a physique of internal combustion engine vehicles as pure hydrogen mixed with natural gas. In addition, hydrogen is used in a growing number of demonstration fuel cell vehicles. Hydrogen and oxygen from air fed into a proton exchange membrane (PEM) fuel cell stack produce comme il faut electricity to power an electric automobile, without producing harmful emissions. Fuel cells generate electricity by electrochemically combining hydrogen and o xygen. On a life-cycle basis, they produce zero or very low emissions, depending on the source of the hydrogen.Fuel cells are highly efficient energy-conversion devices that utilize hydrogen. But there are still many barriers to their use in vehicles, including the lack of a hydrogen distribution infrastructure, high capital costs for fuel cells and hydrogen-production technologies, and challenges related to hydrogen storage. The main difference is that batteries store electrical energy, while fuel cells generate electricity continuously as long as an external fuel source is supplied. That means their performance is not hindered by lengthy, awkward recharging times.If pure hydrogen is used as the fuel source, the only products are electricity, heat and water. The steadfast oxide fuel cell is able to directly utilize commonly available fuels such as natural gas, liquefied petroleum gas, diesel and biogas. When operating on natural gas, carbon dioxide (CO2) emissions are reduced by up to 60 percent compared with conventional electricity generation, with practically no emissions of nitrogen oxides (NOx) and sulphur oxides (SOx). Many scientists hope that pure hydrogen, the most common element on earth, is destined to be the vehicle fuel of the future.Hydrogen can be extracted from thousands of compounds, including natural gas, water, sugar and many petroleum products. The extraction of hydrogen requires energy, making hydrogen an energy carrier rather than an energy source. In transportation, and for many other applications, fuel cell technology is hatchway new doors of opportunity for hydrogen. Governments and industry around the world, are investing heavily in research and development into hydrogen fuel cells. 6. BIODIESEL Pure biodiesel is considered an alternative fuel under EPAct.Biodiesel (fatty acid alkyl esters) is a cleaner burning diesel replacement fuel that can be manufactured from vegetable oils, animal fats, or recycled restaurant greases. Biodi esel is safe, biodegradable, and using in a conventional diesel engine substantially reduces emissions of unburned hydrocarbons, carbon monoxide, converts, polycyclic evocative hydrocarbons, nitrated polycyclic aromatic hydrocarbons, and particulate matter. These reductions increase as the amount of biodiesel blended into diesel fuel increases.The use of biodiesel decreases the solid carbon carve up of particulate matter (since the oxygen in biodiesel enables more complete combustion to CO2) and reduces the sulfate fraction (biodiesel contains less than 15 ppm sulfur), while the soluble, or hydrocarbon, fraction stays the same or increases. Therefore, biodiesel workings well with emission control technologies such as diesel oxidation catalysts (which reduce the soluble fraction of diesel particulate but not the solid carbon fraction). go bads of 20% biodiesel with 80% petroleum diesel can generally be used in unmodified diesel engines.Biodiesel can also be used in its pure form , but it may require certain engine modifications to avoid nutriment and performance problems and may not be suitable for wintertime use. Just like petroleum diesel, biodiesel operates in compression-ignition engines. Higher blends, even pure biodiesel (100% biodiesel ), may be able to be used in some engines (built since 1994) with little or no modification. 7. ELECTRICITY Electricity can be used as a transportation fuel to power battery electric vehicles, fuel cell vehicles and in limited use in hybrid-electric vehicles.Fuel cell vehicles use electricity produced from an electrochemical reaction that takes place when hydrogen and oxygen are combined in the fuel cell stack. The production of electricity using fuel cells takes place without combustion or pollution and leaves only two byproducts, heat and water. Even though the battery electric vehicle itself produces zero pollutants, when emissions from the power generating stations from traditional sources (coal, oil-fired or nuc lear) are factored in, battery powered electric cars still produce less than 10 percent of the emissions of standard internal combustion engine cars.Clean electricity production is possible in future years since the wind and solar power generating stations are becoming as a sources. Maintenance for battery electric vehicles is less, which have fewer moving parts to service and replace, although the batteries must be replaced every three to six years. Plug-in hybrid electric vehicles (HEVs) are hybrid cars with an added battery. As the term suggests, plug-in hybrids which look and perform much like regular cars can be out of use(p) in to a 120-volt outlet (for instance each night at home, or during the workday at a parking garage) and confided.Plug-ins run on the stored energy for much of a typical days driving depending on the size of the battery up to 60 miles per charge, far beyond the commute of an average American and when the charge is used up, automatically keep running on the fuel in the fuel tank. A individual who drives every day a distance shorter than the cars electric range would never have to dip into the fuel tank. Most of the energy used by plug-ins comes from electricity and not from gasoline.That electricity can be generated expeditiously and cleanly from Americas abundant domestic energy resources, thus greatly reducing our dependence on merchandise oil. Unlike in the 1970s, when much of our electricity was generated from oil, today only 2% of our electricity is generated from oil. Hydrogen storage returns around 47% of original energy, while advanced batteries return 75-85%. According to the report, using electricity to charge electric vehicles (EVs) provides twice the miles per kilowatt hour than employing electricity to make hydrogen fuel.Lithium ion batteries developed for portable electronics can store electricity at an energy density about six times greater than conventional lead acid batteries and in the future could go nearly 250 miles between charges. 8. P-SERIES FUEL P-Series fuel is a mixture of natural gas liquids (pentanes plus), ethanol, and methyl tetrahydrofuran(MTHF), a biomass-derived co-solvent. P-Series is predominantly derived from renewable resources and burns much cleaner than gasoline. It can be mixed with gasoline in any proportion and is used in multi-fuel vehicles.Pure Energy Corporation holds the exclusive worldwide license to produce and supply P-Series fuel. Reference 1. Retrieved November 30, 2006, from http//oee. nrcan. gc. ca/transportation/fuels/hydrogen-fuelcells/hydrogen. cfm? attr=16 2. Retrieved November 30, 2006, from http//www. nrel. gov/vehiclesandfuels/hev/plugins. html 3. Retrieved November 30, 2006, from http//www. ethanol. org/e85. html 4. Plug-in Hybrid Vehicles. Retrieved November 30, 2006 from http//www. iags. org/pih. htm 5. K. R. Gerdes and G. J. Suppes. 2001. Miscibility of Ethanol in Diesel Fuels . Ind. Eng. Chem.Res. , 40 (3), 949 -956, 2001 6. A. C. Hansen, P. W. L. Lyne, and Q. Zhang, Ethanol-Diesel Blends A Step Towards Bio-based Fuel for Diesel Engines, ASAE Paper No. 01-6048, July2001. 7. Hua Lu Karlsson. 2006. Emissions from Conventional Gasoline Vehicles Driven with Ethanol Blend Fuels. http//www. senternovem. nl/mmfiles/ ethanol_blend_emissions_in_conventional_vehicles_tcm24-195177. pdf. 8. U. S. Department of Energy. 2006. http//www. eere. energy. gov/ afdc/afv/prop_vehicles. html. 9. Ethanol Fact Book. 2005. www. cleanfuelsdc. org/pubs/ documents/2003EthanolFactBook. pdf.