Due to the high demand of energy needed for economic growth, fossil fuels such as coal will continue to dominate the world energy supplies into the 21st century. The requirements for this energy directly affect the environment due to pollutant emissions and particulate disposition. Therefore, the process of coal gasification has become a significant way to produce energy.
Coal gasification technologies often involved high pressure operations. Pressure as high as 40atm had been used for gasification. With a suitable level of operating pressure, the reactivity and coal efficiency of the gasification process are dramatically enhanced. Therefore, understanding the uses of operating pressure of coal gasification is very critical as the knowledge will improve the gasification technologies significantly. Advancement of these gasification technologies will thus, help to meet the growing demand of energy globally.
In this thesis, the various aspects of pressure’s influence on gasification will be examined. Therefore, the thesis emphasise greatly on the experimental observations of the effects of pressure towards coal char steam gasification reactivity. Evidence from mounting experimental studies has shown that the increase of pressure on the intrinsic reactivity and chemical structure of the coal. However, increasing the pressure level during the gasification process will increase the process’s reactivity rate. The evidence has also suggests that factors such as the coal properties, ranking, active catalyst and their minerals content will produce considerable effects in the steam gasification reactivity when influence by pressure.
This thesis will also explain the results of the reviewed literature, supported by the evidence obtained during the course of the research.