A model of steam reforming of iso-octane: The effect of thermal boundary conditions on hydrogen production and reactor temperature

Shi, Liming; Bayless, David J.; Prudich, M.E.

doi:10.1016/j.ijhydene.2008.06.017

Cited by 17 publications

(9 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, a CFD (Computational Fluid Dynamics) approach is applied. The prediction of the aerothermochemical variables of fluid flow is available by solving the Reynolds Average Navier-Stokes equations (RANS), energy and transport of chemical species [21][22][23]. Turbulence is described by K-ɛ model [17][18][19][20][21][22][23][24][25][26].…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…The prediction of the aerothermochemical variables of fluid flow is available by solving the Reynolds Average Navier-Stokes equations (RANS), energy and transport of chemical species [21][22][23]. Turbulence is described by K-ɛ model [17][18][19][20][21][22][23][24][25][26]. This is useful in order to correct an overestimation due to radial expansion of the round jet coming from the ring injector [27,28].…”

Section: Mathematical Modelingmentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of the injection conditions effect on the behavior of hydrogen-air diffusion flame

et al. 2022

View full text Add to dashboard Cite

In order to respond to the increased demand for clean energy without harming the atmosphere through polluting emissions, Energy production from the hydrogen combustion become largely used. This work presents a numerical study of the injection conditions effect on the structure of the H2-Air diffusion flame. The aim is to reproduce a practical case of non-polluting combustion and resulting in very high temperatures. The configuration is composed of two axisymmetric coaxial jets, as can be found in the diffusion burners. A presumed probability density function (PDF) approach is used to describe the chemistry-turbulence interaction. K-epsilon model of turbulence is used. Particular attention is given to phenomena anchoring or blowout of the flame.

show abstract

Section: Mathematical Modelingmentioning

confidence: 99%

Section: Mathematical Modelingmentioning

confidence: 99%

Numerical study of the injection conditions effect on the behavior of hydrogen-air diffusion flame

et al. 2022

View full text Add to dashboard Cite

show abstract

“…k i describes the reaction rate coefficient and follow the Arrhenius equation form given by

k_{i} = A_{i} exp ((), - E_{i} / italicRT) ((),,, i = 1, 2, 3),

where A i is the preexponential factor, E i is the activation energy of reaction, and R is the universal gas constant. Values of E i and A i are given in Table , where E 2 is based on the model of Xu and Froment, and E 1 and E 3 for oxidation and WGS reaction, respectively, are based on the model of Tiemersma et al Ma et al used Equation in their model of partial oxidation, and Equation was used in the model of Shi et al for the steam reforming of iso‐octane.

K_{C_{16} H_{34}}

and

K_{{normalO}_{2}}

are used as adsorption equilibrium constants for fuel and oxygen, and K e2 and K e3 are modified equilibrium constants for reforming and WGS reactions.…”

Section: Reaction Mechanism and Kinetic Modelmentioning

confidence: 99%

“…Values of E i and A i are given in Table 1, where E 2 is based on the model of Xu and Froment, 33 and E 1 and E 3 for oxidation and WGS reaction, respectively, are based on the model of Tiemersma et al 34 Ma et al 35 used Equation 5 in their model of partial oxidation, and Equation 6 was used in the model of Shi et al 36 for the steam reforming of iso-octane. K C 16 H 34 and K O 2 are used as adsorption equilibrium constants for fuel and oxygen, and K e2 and K e3 are modified equilibrium constants for reforming and WGS reactions.…”

Section: Reaction Mechanism and Kinetic Modelmentioning

confidence: 99%

Autothermal reforming of n-hexadecane over Rh catalyst to produce syngas in microchannel reactor using finite element method

Malik

Kim

2018

Int J Energy Res

View full text Add to dashboard Cite

Summary Numerical study on the autothermal reforming of n‐hexadecane, which can be used in proton exchange membrane fuel cell for automotive applications, in microchannels is necessary. A 2D computational fluid dynamics (CFD) model, with combustion and reforming channels thermally coupled and separated by a metal medium wall, is developed and studied in terms of hydrogen production and catalyst activity. Rh supported on CeO2 is used as a catalyst and applied to the inner surface of the channels, where the catalytic endothermic and exothermic reactions occur. CFD analysis shows considerable results in terms of reactor performance. Along the reactor channel length, the mole percentage of hydrogen is 86% after over 2 hours of catalyst activity. The corresponding fuel conversion in respective channels is 85% on the catalytic surface of the reactor. The predicted hydrogen production from the CFD model is 59% higher than that as equilibrium conditions. Heat conduction through the medium solid wall depends on the thermal conductivity of a material. In this model, a metal solid wall with thermal conductivity of 40 W/m K, which transfers heat from the combustion channel within milliseconds, is used. The calculated model operating temperature in the reforming channel ranges from 660 to 850 K.

show abstract

“…As noted above, the very low reaction order with respect to isooctane suggests a strong adsorption of the hydrocarbon on the catalyst surface.Shi et al154 recently studied the steam reforming of isooctane in a monolithic type reactor simulated by a three -dimensional CFD model. They considered global reactions to represent steam reforming of isooctane, which include steam reforming of isooctane to syngas as expressed in Equation 2.48 , WGS reaction as shown in Equation 2.2 , and the net reaction by combining these two reactions to produce H 2 and CO 2 as shown in Equation 2.51 :They have calculated the equilibrium constants for these reactions by fi tting the preexponential factors and activation energy for each reaction shown inTable 2.18 in Arrhenius equation (Eq.…”

mentioning

confidence: 99%

Catalytic Steam Reforming Technology for the Production of Hydrogen and Syngas

Velu¹,

Sharma

Zhang

et al. 2009

Hydrogen and Syngas Production and Purification Technologies

View full text Add to dashboard Cite

A model of steam reforming of iso-octane: The effect of thermal boundary conditions on hydrogen production and reactor temperature

Cited by 17 publications

References 19 publications

Numerical study of the injection conditions effect on the behavior of hydrogen-air diffusion flame

Numerical study of the injection conditions effect on the behavior of hydrogen-air diffusion flame

Autothermal reforming of n-hexadecane over Rh catalyst to produce syngas in microchannel reactor using finite element method

Catalytic Steam Reforming Technology for the Production of Hydrogen and Syngas

Contact Info

Product

Resources

About