Using Hydrogen as Alternative Fuels

Using hydrogen as alternative fuels

Since the population in the whole world is increasing at a high rate nowadays, the demand for energy and in turn the demand for fuels is increasing rapidly. Also, combustion of traditional fossil fuels produces lots of air pollutants, which cause air pollution. Therefore, alternative energy production method and fuels are investigated. One of the alternative fuels is hydrogen, which will be discussed in this essay. One effective and useful way to use hydrogen is as fuels for vehicles as the number of vehicles in Hong Kong is large. The purpose of this essay is to discuss the use of hydrogen as fuels and its application in vehicles, and suggest how it might affect Hong Kong people with respiratory diseases in the next 50 years. The fuels used by vehicles nowadays contribute a lot to the air pollution, hydrogen fuels are thus invented to replace the traditional fuel in vehicles in order to reduce the air pollution brought by vehicles. This essay covers how the hydrogen works as a fuel, its application, which is used as a car fuel, and eventually the future impact of it to Hong Kong.

This paragraph is going to discuss the background science of hydrogen being used as a fuel, as well as its application and its importance. There are two methods for hydrogen to generate energy. One of them is that hydrogen reacts with oxygen in a fuel cell. In another way, hydrogen is used in a modified spark ignition engine, such as the Otto and Diesel engines (Sørensen 2005). When hydrogen is burnt in the engine, electrical energy is generated, and no atmospheric pollutants are emitted, according to numerous research and development programs (Buchner 1995). For both methods, the chemical energy of hydrogen is converted to electrical energy. There are several applications for hydrogen used as a fuel, such as used as fuels for spacecraft and aircrafts. But in this essay, its uses on vehicle fuels are investigated. Modified spark ignition...