Change search
ReferencesLink to record
Permanent link

Direct link
Reduction of NOx Emissions from the Gas Turbines for Skarv Idun
Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, Department of Energy and Process Engineering.
2007 (English)MasteroppgaveStudent thesis
Abstract [en]

Nitrogen oxides (NOx) are formed by oxidation of nitrogen during the combustion process, and production rate is highly affected by flame temperature. NOx is regarded as a local pollutant causing smog, acid rain and health complaints, and strictest emission regulations are found in urban areas. Reduction of NOx emissions from gas turbines can be achieved by modifying the combustion process or by exhaust gas clean up. Several technologies are already commercial available, but there are still a great many being developed. Increased focus on the environment also forces manufacturers to improve existing technology. In this report, different NOx abatement technologies are looked into, and an optimal solution for the coming gas turbines on Skarv Idun is presented. Different techniques are compared in terms of thermal efficiency, emissions, maintenance requirements, load acceptance and rejection, engine stability and reliability and availability. Application and suitability of available technologies for reducing NOx from the selected gas turbines is discussed, and user experience for these is collected. It is showed that all technologies influence operation of the gas turbines to some extent, either by increasing/decreasing efficiency or by affecting engine stability. They also differ in their ability to reduce NOx emissions over the entire load range. Due to weight and space restrictions on offshore installations, limited technologies are suitable for platforms and boats. Gas turbines installed offshore are usually aero-derivative engines with high efficiency and relative low emissions of CO2. This year, Norwegian government introduced a NOx tax in order to reduce NOx emissions from the petroleum industry. Operators are forced to use best available technology, and dry low emission control (DLE) is the only one considered qualified as far as NOx is concerned. DLE is also chosen as the optimal solution for the planned gas turbines on Skarv Idun, due to small operational impacts and positive experience from existing fields. It is however recommended to allocate space in case a new and better combustor with lower emission levels is developed. Looking at a longer perspective, Cheng technology including steam injection into the gas turbine combustor seems very promising for NOx abatement.

Place, publisher, year, edition, pages
Institutt for energi- og prosessteknikk , 2007. , 69 p.
Keyword [no]
ntnudaim:3569, MTENERG energi og miljø, Varme- og energiprosesser
URN: urn:nbn:no:ntnu:diva-16749Local ID: ntnudaim:3569OAI: diva2:536427
Available from: 2012-06-21 Created: 2012-06-21

Open Access in DiVA

fulltext(800 kB)7208 downloads
File information
File name FULLTEXT01.pdfFile size 800 kBChecksum SHA-512
Type fulltextMimetype application/pdf
cover(47 kB)35 downloads
File information
File name COVER01.pdfFile size 47 kBChecksum SHA-512
Type coverMimetype application/pdf

By organisation
Department of Energy and Process Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 7210 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 168 hits
ReferencesLink to record
Permanent link

Direct link