Methane steam reforming in asymmetric Pd- and Pd-Ag/porous SS membrane reactors

Shu, Jun; Grandjean, Bernard P. A.; Kaliaguine, Serge

doi:10.1016/0926-860x(94)85199-9

Cited by 344 publications

(237 citation statements)

References 16 publications

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“…For the trend of methane and carbon dioxide conversion, reported in Fig. 5 and 6 respectively, the results are comparable with the studies of Shu et al [75] and Lin et al [76]. For the integrated membrane reactor temperature and pressure have a positive effect on methane and carbon dioxide conversion: the chemical equilibrium is shift to the products, resulting in higher conversion.…”

Section: Using the Xu And Froment Kinetic Reactionsupporting

confidence: 80%

Mathematical Modeling of an Integrated Membrane Reactor for Methane Steam Reforming

Leonzio¹

2016

IJRET

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Section: Using the Xu And Froment Kinetic Reactionsupporting

confidence: 80%

Mathematical Modeling of an Integrated Membrane Reactor for Methane Steam Reforming

Leonzio¹

2016

IJRET

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“…8 Heat transfer across the membrane involves both convection from the gas mixture to the membrane, conduction across the membrane layer, and finally convection from the membrane to the second gas mixture. Radiation of heat is neglected.…”

Section: Governing Equations For Membrane Reactormentioning

confidence: 99%

Simulation Investigation of Novel Membrane Reactors for Catalytic Reactions

Elnashaie¹

2017

IPCSE

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Almost all catalytic reactions in the petrochemical industry are reversible and therefore their conversion is limited by the thermodynamic equilibrium. This conservative limitation can be broken by using selective membranes to remove one of the products. In this paper this revolutionary concept is used for the dehydrogenation reaction where the selective membranes are used for the perm-selective removal of hydrogen.1-3 These membranes have 100% selectivity for the removal of hydrogen. Most efficient configuration is when in the other side of the membrane is a hydrogenation reaction and the flows in the two sides of the membrane are counter-current. International Journal of Petrochemical Science & Engineering Research ArticleOpen Access Simulation investigation of novel membrane reactors for catalytic reactions Governing equations for membrane reactorTo obtain the mole balance equation and the energy balance equation, a differential element inside the membrane reactor was considered. After writing the two balances under the steady state assumption, both sides of the resulting equations were divided by the thickness of the differential element, which was then forced to approach zero. The resulting balances equations of the shell side can be expressed as:Mole balance:Energy balance:( ) ( )Pressure drop:The corresponding balance equations for the tube side can be expressed as:Mole balance:Energy balance:The hydrogen flux across the membrane surface obeys Sievert's law,The pre-exponential constant, permeation activation energy, and the thickness of the hydrogen permeation membrane are taken as 6.33×10 , 15700 J/mole, and 1~2×10 -5 m, respectively. 8 Heat transfer across the membrane involves both convection from the gas mixture to the membrane, conduction across the membrane layer, and finally convection from the membrane to the second gas mixture. Radiation of heat is neglected. The membrane tube is considered to be The convective heat transfer coefficients in equation (24) are calculated using Leva's correlation (1949).11 For the shell side in which the reacting mixture is heated up, the convective heat transfer coefficient is calculated by: 11 0.9 6 0.813 exp…………………… (25) In contrast, the reacting mixture in the tube side is cooled and consequently the convective heat transfer coefficient is calculated by: 11 0.7 4.6 3.50 expPhysical properties such as, thermal conductivity, gas density and viscosity, and heat capacities are taken as functions of temperature from Yaws. Boundary conditionsIn the case of the co-current operation ( ) 2 b= , the above system of differential equations gives an initial value problem which can be solved by a Runge-Kutta Verner fifth and sixth order method with an automatic step size, double precision calculation, and a relative error of 1×10 -12 to ensure high accuracy. The initial conditions are:For the counter-current operation case ( ) 1 b= , the above system of differential equations results in a split two-point boundary value problem which can be solved by an orthogonal c...

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“…A sufficiently large number of publications deal with the development of this promising technique of HPH production, some of them [1][2][3][4][5][6][7][8][9][10] being mentioned in the Reference. The results reported in [10] are of the greatest interest, namely, the results of testing (~ 3000 hours) of a steadystate experimental-industrial unit with a maximum production rate of 40 m 3 H 2 /h, based on a membrane reformer (MR), designed for producing highly pure (99.999 %) hydrogen from natural gas (NG).…”

Section: Introductionmentioning

confidence: 99%

“…Recently there has been an increasing interest in the creation of systems for producing highly pure gaseous hydrogen, which are based on the membrane extraction of hydrogen simultaneously with the catalytic conversion of methane [1][2][3][4]. This interest is mainly due to the fact that the high purity of hydrogen product is combined with high volumes of hydrogen output, smaller device dimensions and a decrease in operating temperatures from conventional 800-850 ºC for hydrocarbon steam conversion to 600-700 ºC [5][6][7] and even 550-500 ºC [3,10].…”

Section: Introductionmentioning

confidence: 99%

Calculating the main parameters of a membrane reformer with a production rate of 40 m3/h designed for producing highly pure hydrogen from natural gas

Vandyshev¹,

Куликов²

2015

DREAM

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The main design and technological parameters of a membrane reformer with a production rate of 40 m 3 H 2 /h, including its static flow rate characteristic, are quantitatively estimated on the basis of a mathematical model of membrane extraction of highly pure hydrogen from hydrocarbon steam conversion products. It is shown that the calculation results are in good agreement with the data found in the literature on testing a membrane reformer designed for producing highly pure hydrogen from natural gas.

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Methane steam reforming in asymmetric Pd- and Pd-Ag/porous SS membrane reactors

Cited by 344 publications

References 16 publications

Mathematical Modeling of an Integrated Membrane Reactor for Methane Steam Reforming

Mathematical Modeling of an Integrated Membrane Reactor for Methane Steam Reforming

Simulation Investigation of Novel Membrane Reactors for Catalytic Reactions

Calculating the main parameters of a membrane reformer with a production rate of 40 m3/h designed for producing highly pure hydrogen from natural gas

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