It is important that gas turbines used in Oil & Gas applications can burn a wide variety of fuels with the minimum impact on the environment or project economics. This paper is an introduction for those unfamiliar with gas turbine combustion in any detail into how emissions such as NOx are formed, and how the two most common types of gas turbine combustion system — the ‘conventional’ diffusion flame combustor and the Dry Low Emissions (DLE) combustor operate.
There are many types of gaseous and liquid fuels that can be used in Gas Turbines, which can come from a wide range of natural and industrial sources. These different potential fuels are discussed, along with the flexibility of the two different combustion systems to accept different types of fuel.
Some of the common contaminants found in these fuels are also discussed, along with the impact these have on the operability and maintenance of industrial and aero-derivative gas turbines, and methods to minimize the impact of these contaminants identified. Finally the paper looks at recommendations on liquid fuel storage to minimize operational issues on liquid fuels.