Impact of NOx Emissions Released from a Gas Turbine-Based Power Plant on the Ambient Air Quality

Sabah Al-Suleiman*, Sulaiman Fadlallah, Almundher Alnaamani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The number of gas turbine- (GT-) based power plants is rapidly increasing to meet the world’s power demands. Until a few years ago, fossil fuel, and specifically fuel oil, was considered the major energy source for gas turbine operation. Due to the high amount of pollution that fuel oil generates, natural gas has become a popular source of energy due to its lower emissions compared to fuel oil. As a result, many GTs have switched to natural gas as an alternative to fuel oil. However, pollutants expelled from GT-based power plants operating on natural gas impact surrounding air quality. The objective of this study was to examine the dispersion of nitrogen oxides (NOx) emitted from a GT-based power plant located in the Sultanate of Oman. Supported by CALPUFF dispersion modeling software, six scenarios were investigated in this study. The first four scenarios considered a case where the GT-based power plant was operating on natural gas during winter and summer and for open and combined cycle modes. The remaining two scenarios considered, for both open and combined cycle modes, the case where the GT-based power plant was operating on fuel oil. Whether run by natural gas or fuel oil, CALPUFF simulation results for both seasons showed that NOx concentrations were higher when GTs were used in the combined cycle mode. The concentrations were still lower than the allowable concentrations set by the United States Environmental Protection Agency (U.S. EPA) standards. In contrast, for the case where the power plant operated on fuel oil, the NOx one-hour average simulated results exceeded the allowable limits only when the combined cycle mode was activated.

Original languageEnglish
JournalEnvironmental Forensics
Publication statusPublished - 2019


  • dispersion
  • Gas turbine
  • nitrogen oxides
  • point source
  • Sultanate of Oman

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law


Dive into the research topics of 'Impact of NO<sub>x</sub> Emissions Released from a Gas Turbine-Based Power Plant on the Ambient Air Quality'. Together they form a unique fingerprint.

Cite this