Measurement of adiabatic burning velocity in natural gas-like mixtures

Velamati, Ratna Kishore; Duhan, Nipun; Ravi, M.R.; Ray, Anjan

doi:10.1016/j.expthermflusci.2008.06.001

Cited by 56 publications

(31 citation statements)

References 18 publications

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“…Several studies have shown that adding CO 2 to CH 4 -air flames reduces the laminar burning velocity of CH 4 through both thermal and chemical effects [19][20][21]. The extent of this reduction is captured correctly by all three tested mechanisms (see Fig.…”

Section: Mechanism For Oxy-fuel Combustion Of Chmentioning

confidence: 81%

Chemical kinetics mechanism for oxy-fuel combustion of mixtures of hydrogen sulfide and methane

Bongartz

Ghoniem

2015

Combustion and Flame

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Oxy-fuel combustion of sour gas, a mixture of natural gas (essentially methane (CH 4 )), carbon dioxide (CO 2 ), and hydrogen sulfide (H 2 S), could enable the utilization of large natural gas resources, especially when combined with enhanced oil recovery. In this work, a detailed chemical reaction mechanism for oxy-fuel combustion of sour gas is presented. To construct the mechanism, a CH 4 sub-mechanism was chosen based on a comparative validation study for oxy-fuel combustion. This mechanism was combined with a mechanism for H 2 S oxidation, and the sulfur sub-mechanism was then optimized to give better agreement with relevant experiments. The optimization targets included predictions for the laminar burning velocity, ignition delay time, and pyrolysis of H 2 S, and H 2 S oxidation in a flow reactor. The rate parameters of 15 sulfur reactions were varied in the optimization within their respective uncertainties. The optimized combined mechanism was validated against a larger set of experimental data over a wide range of conditions for oxidation of H 2 S and interactions between carbon and sulfur species. Improved overall agreement was achieved through the optimization and all important trends were captured in the modeling results. The optimized mechanism can be used to make qualitative and some quantitative predictions on the combustion behavior of sour gas. The remaining discrepancies highlight the current uncertainties in sulfur chemistry and underline the need for more accurate direct determination of several important rate constants as well as more validation data.

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Section: Mechanism For Oxy-fuel Combustion Of Chmentioning

confidence: 81%

Chemical kinetics mechanism for oxy-fuel combustion of mixtures of hydrogen sulfide and methane

Bongartz

Ghoniem

2015

Combustion and Flame

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“…The initial grid was based on temperature profile estimate. By selecting the gradient and cur vature as above the LBV computations become independent of the grid [11].…”

Section: Numerical Modellingmentioning

confidence: 99%

“…A cross section of 3 holes of the brass burner plate is shown in Figure 1, where th e stream line of the gas flow are sketched on the left side showing that the flow is flattened by the press ure drop of flame front [11]. The total heat gain of t he flame is defined as Q G while the total heat loss is defined as Q L .…”

Section: Heat Flux Experimental Set Up Used In the Present Workmentioning

confidence: 99%

“…This set up is developed at Indian Institute of Technology, Delhi by Ratnakish ore [11], refurbished and modified by Yadav [12]. The HFM technique demonstrates to measure the net heat loss from the flame to the burner plate and setting the unburned mixture velocity in such a way that no net heat loss to the burner occurs.…”

Section: Heat Flux Experimental Set Up Used In the Present Workmentioning

confidence: 99%

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Experimental and Computational Determination of LBV of Hydrogen Enriched Methane Mixtures

Yadav

Singha²,

Pandey³

et al. 2014

SMSJ

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“…Liao et al 47 studied the effects of dilute gas on burning velocities at the equivalence ratios from 0.7 to 1.2 for natural gas-air mixtures, and an explicit formula of laminar burning velocities for dilute mixtures was formulated. Further work on natural gas-air mixtures was carried out experimentally by Kishore et al 48 over a range of equivalence ratios at atmospheric pressure. Also, the effect of CO 2 dilution up to 60%, N 2 dilution up to 40% and 25% enrichment of ethane on burning velocity of methaneair flames were studied.…”

Section: Previous Studiesmentioning

confidence: 99%

Measurements of the laminar burning velocity for propane: Air mixtures

Ebaid

Al-khishali

2016

Advances in Mechanical Engineering

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In this research, an experimental setup was built based on using K-type thermocouples inserted in a cylindrical vessel and coupled with a computer system to enable online reading of flame speed for propane-air mixtures. The work undertaken here has come up with data for laminar burning velocity of the propane-air mixtures based on three initial temperatures T u = 300, 325 and 350 K, three initial pressures p u = 0.5, 1.0 and 1.5 bar over a range of equivalence ratios f between 0.6 and 1.5. The results obtained gave a reasonable agreement with experimental data reported in the literature. Results showed that laminar burning velocity increases at low initial pressures and decreases at high pressures, while the opposite occurs incase of temperatures. The maximum values of the laminar burning velocity occur at T = 350 K, p u = 0.5 and f = 1.0, respectively, while the minimum values of the laminar burning velocity occur at T = 300 K, p u = 1.5 and f = 1.2. Also, the influence of flame stretching on laminar burning velocity was investigated and it was found that stretch effect is weak since Lewis number was below unity for all cases considered. Based on experimental results, an empirical equation has been derived to calculate the laminar burning velocity. The values of the laminar burning velocity calculated from this equation show great compatibility with the published results. Therefore, the derived empirical equation can be used to calculate the burning velocities of any gas of paraffin gas fuels in the range of mixture temperature and pressure considered.

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Measurement of adiabatic burning velocity in natural gas-like mixtures

Cited by 56 publications

References 18 publications

Chemical kinetics mechanism for oxy-fuel combustion of mixtures of hydrogen sulfide and methane

Chemical kinetics mechanism for oxy-fuel combustion of mixtures of hydrogen sulfide and methane

Experimental and Computational Determination of LBV of Hydrogen Enriched Methane Mixtures

Measurements of the laminar burning velocity for propane: Air mixtures

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