Effects of content of hydrogen on the characteristics of co-flow laminar diffusion flame of hydrogen/nitrogen mixture in various flow conditions

Piemsinlapakunchon, Tananop; Paul, Manosh C.

doi:10.1016/j.ijhydene.2017.12.103

Cited by 10 publications

(7 citation statements)

References 19 publications

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“…Burner appearance, mesh generation, and boundary condition are also shown in Figure 1. Reliability of this model was already confirmed in [27] by having the good agreement of the numerical results of this model in all the test cases when compared to the experimental data of [26].…”

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 57%

“…The burner was initially modelled for studying the characteristics of laminar diffusion H2/N2 flame in Piemsinlapakunchon and Paul [27]. However, some modifications are made to this model.…”

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

“…Boundary condition setup and the governing equations of continuity, momentum, energy, species transport and radiative transfer equations, and the material properties remain the same as those already presented in [27]. These governing equations are solved numerically in a segregated manner.…”

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

“…The model was also used for formulating the various flames at the same temperature, pressure, and flow velocity as presented in [27]. The fuel was ignited by setting the temperature of cells close to the fuel inlet at 1800 K for the first 1000 iterations.…”

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

“…The simulation was then run until the contours of temperature, velocity, and distribution of major species (H2, CO, H2O, CO2, N2, NO and NO2) became steady-state with the residuals of the converged solutions of the continuity, momentum, and energy equations staying between 10 -3 and 10 -6 . Further details on the numerical approach utilised in the study were given in [27] and will not be repeated here.…”

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

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Effects of fuel compositions on the heat generation and emission of syngas/producer gas laminar diffusion flame

Piemsinlapakunchon

Paul

2019

International Journal of Hydrogen Energy

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Demand for the clean and sustainable energy encourages the research and development in the efficient production and utilisation of syngas for low-carbon power and heating/cooling applications. However, diversity in the chemical composition of syngas, resulting due to its flexible production process and feedstock, often poses a significant challenge for the design and operation of an effective combustion system. To address this, the research presented in this paper is particularly focused on an in-depth understanding of the heat generation and emission formation of syngas/producer gas flames with an effect of the fuel compositions. The heat generated by flame not only depends on the flame temperature but also on the chemistry heat release of fuel and flame dimension. The study reports that the syngas/producer gas with a low H2:CO maximises the heat generation, nevertheless the higher emission rate of CO2 is inevitable. The generated heat flux at H2:CO = 3:1, 1:1, and 1:3 is found to be 222, 432 and 538 Wm-2 respectively. At the same amount of heat generated, H2 concentration in fuel dominates the emission of NOx. The addition of CH4 into the syngas/producer gas with H2:CO = 1:1 also increases the heat generation significantly (e.g. 614 Wm-2 at 20%) while decreases the emission formation. In contrast, adding 20% CO2 and N2 to the syngas/producer gas composition reduces the heat generation from 432 Wm-2 to 364 and 290 Wm-2 , respectively. The role of CO2 on this aspect, which is weaker than N2, thus suggests CO2 is preferable than N2. Along with the study, the significant role of CO2 on the radiation of heat and the reduction of emission are examined.

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Section: Burner Configuration and Numerical Methodsmentioning

confidence: 57%

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

Section: Burner Configuration and Numerical Methodsmentioning

confidence: 99%

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