Effects of CO2, H2O and N2 Dilutions on Emission Characteristics and Partially Premixed Combustion of Shale Gas
Suat Ozturk, Department of Electronic and Automation, Zonguldak Vocational School, Zonguldak Bülent Ecevit University, Zonguldak, Turkey.
Manuscript received on July 20, 2019. | Revised Manuscript received on August 10, 2019. | Manuscript published on August 30, 2019. | PP: 4440-4446 | Volume-8 Issue-6, August 2019. | Retrieval Number: F8974088619/2019©BEIESP | DOI: 10.35940/ijeat.F8974.088619
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Environmental constraints of countries on hazardous emissions promote the usage of gas fuels in combustion systems for energy production. The shale gas recently shines out as one of the promising gas fuels of the future owing to its wide reserves discovered in the different gas fields of countries. This study numerically focuses on the emission characteristics and turbulent adiabatic combustion of partially premixed shale gas and humid air with dilution effects of CO2, H2O, and N2 under different pressures. Ansys codes are used for the numerical computations of computational fluid dynamics on 2D model of a co-axial type combustor to find out the emissions and flame speeds during the combustion of shale gas and air. Based on the results, the maximum NO mass fractions are obtained at 1.42, 1.44, and 1.4 equivalence ratios for Barnette, New Albany, and Haynesville. The increasing equivalence ratio raises the mass fractions of CO and turbulent flame speeds. The rising CO2 dilution into the additional air diminish the flame speeds, NO and CO fractions. The growing H2O addition decreases NO and CO mass fractions. On the contrary, it augments the flame speeds. The enhancing N2 dope decreases NO and rears CO mass fractions. The rising pressure with 15% CO2 dilution fades up the turbulent flame speeds, NO and CO fractions. The pressure increment with 15% H2O dope reduces CO and the flame speeds. But, it lightly relieves NO fractions. The growing pressure with 15% N2 addition abates the mass fractions of CO and turbulent flame speeds.
Keywords: Shale gas, Partially premixed combustion, Turbulent, Emissions.