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Concept of hydrogen fired gas turbine cycle with exhaust gas recirculation: Assessment of combustion and emissions performance
SINTEF Energy Research, Trondheim, Norway .
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0002-6279-4446
Norwegian University of Science and Technology, Trondheim, Norway .
2015 (English)In: International Journal of Greenhouse Gas Control, ISSN 1750-5836, Vol. 37, 377-383 p.Article in journal (Refereed) Published
Abstract [en]

A novel gas turbine cycle concept applicable to power plants with pre-combustion CO<inf>2</inf> capture or integrated gasification combined cycle (IGCC) is presented. These power plants use a hydrogen rich fuel with high reactive combustion properties which makes fuel dilution necessary to achieve low NOx emissions. The proposed novel gas turbine arrangement is set up as to avoid both fuel dilution and its consequent efficiency penalty, and breakthrough in low NOx combustion technology. In this concept, a high exhaust gas recirculation (EGR) rate is applied in order to generate an oxygen depleted working fluid entering the combustor, enough to reduce the high reactivity of hydrogen rich fuels. As a result, the combustion temperature in this environment is inherently limited, thus, keeping NOx formation rate low. A first order assessment of the combustion characteristics under such gas turbine operating conditions is made in the light of a numerical analysis of stability and NOx emissions potential. Both diffusion and premixed types combustor are considered according to the selected EGR rate. It is first shown that the flame stability could be maintained at EGR rates well above the maximum EGR limit found in conventional natural gas fired gas turbines. The study further shows that at these high EGR rates, considerable reductions in NOx emissions can be expected. The conclusion of this first order analysis is that there is a true potential in reducing the efficiency penalty induced by diluting the fuel in power plants with pre-combustion CO<inf>2</inf> capture. 

Place, publisher, year, edition, pages
2015. Vol. 37, 377-383 p.
Keyword [en]
Exhaust gas recirculation (EGR), Hydrogen gas turbine, IGCC, NOx, Pre-combustion CO2 capture, Carbon dioxide, Combustion, Combustors, Exhaust gas recirculation, Exhaust gases, Fuels, Gas emissions, Gas plants, Gas turbines, Gases, Hydrogen, Nitrogen oxides, Precombustion, Hydrogen gas, Pre-combustion co, Gas turbine power plants, carbon sequestration, exhaust emission, natural gas, power plant, turbine
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-27881DOI: 10.1016/j.ijggc.2015.04.004ISI: 000357146500037Scopus ID: 2-s2.0-84926647155OAI: oai:DiVA.org:mdh-27881DiVA: diva2:807270
Available from: 2015-04-23 Created: 2015-04-23 Last updated: 2015-04-23Bibliographically approved

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