天然气(国外英文资料).docVIP

天然气(国外英文资料) Manual for the promotion of compressed natural gas vehicles I. Basic knowledge of natural gas vehicles 1. What is a gas car? In brief, natural gas vehicles are a kind of gas fueled vehicles, which use natural gas as fuel. The methane content of natural gas is more than 90%, which is a good fuel for automobile engines. At present, natural gas has been recognized as the most realistic and technically mature alternative fuel for automobile gasoline and diesel in the world, and natural gas vehicles have been widely used in the world and in China and in our city. At present, the city is promoting the use of compressed natural gas or gasoline, compressed natural gas - gasoline dual fuel vehicles, referred to as CNG vehicles, will also vigorously promote the application of single fuel gas vehicles in the future. The pressure of vehicle compressed natural gas is usually about 20MPa. The natural gas can be obtained by dehydration and desulfurization and purification, and then is suppressed by multi-stage compression. The state in which it is used is gas. 2, the main advantages and disadvantages of natural gas vehicles (1) natural gas vehicles are clean fuel vehicles. The emission of natural gas vehicles is much lower than that of automobiles. The exhaust gas contains no sulfides or lead. Carbon monoxide is reduced by 80%, hydrocarbons decreased by 60%, and nitrogen oxides decreased by 70%. Therefore, many countries have taken the development of natural gas vehicles as an important means of reducing air pollution. (2) natural gas vehicles have significant economic benefits. Lower vehicle operating costs. At present, the price of natural gas is much lower than that of gasoline and diesel, and the cost of fuel is generally saved by about 50%, so that the operation cost is greatly reduced. Owing to the existence of differential price of oil and gas, the cost of changing the vehicle can be recovered within one year. May save maintenance cost. The engine uses natural g