CFD modeling of hydrogen production using steam reforming of methane in monolith reactors: Surface or volume-base reaction model?

Irani, Mohammad; Alizadehdakhel, Asghar; Pour, Ali Nakhaei; Hoseini, Nasibeh; Adinehnia, Morteza

doi:10.1016/j.ijhydene.2011.09.030

Cited by 62 publications

(25 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(4) As recommended by Irani et al (11) , the catalyst layer is modeled in the surface-based reaction rate such as the source and sink for species, and thus, source terms from the bulk flow are neglected. The reaction rates obtained with Eq.…”

Section: Journal Of Thermalmentioning

confidence: 99%

Deduction of Proper Reaction Rate of Steam Methane Reforming over Catalyst Surface Validated with a Combination of One- and Two-Dimensional Simulations

Lin

Saito

Niina

et al. 2012

JTST

View full text Add to dashboard Cite

Hydrogen can be used not only as a fuel, but also for the chemical processing. One of the applications is as a synthesis gas in the gas-to-liquid (GTL) process which produces liquid fuel from a gaseous one and has tremendous potential for the future energy industry. Steam methane reforming (SMR) is one of the major methods of hydrogen production. To optimize SMR, pressure dependence is important since the Fischer-Tropsch (FT) process, which is the oil production process in GTL, favors high pressure. In this study, using the rate expressions of SMR, which are obtained by experiment using a nickel-based catalyst supported on a metal plate in a rectangular channel, two-dimensional (2-D) simulation was performed at four different pressures ranging from 0.1 to 0.4 MPa in addition to one-dimensional (1-D) simulation. The reaction rates deduced from the experimental results on the basis of pseudo-bulk reaction naturally fit the 1-D simulation. The more precise 2-D simulation, however, inevitably needs some modification to reasonably predict the phenomena on the basis of the data from the pseudo-bulk reaction. As a result, the discrepancy between the results could be fixed by adjusting the reaction rate for the related pressure, and the adjusted factors show consistency between 1-D and 2-D calculations. Finally, the proper rate equations were estimated.

show abstract

Section: Journal Of Thermalmentioning

confidence: 99%

Deduction of Proper Reaction Rate of Steam Methane Reforming over Catalyst Surface Validated with a Combination of One- and Two-Dimensional Simulations

Lin

Saito

Niina

et al. 2012

JTST

View full text Add to dashboard Cite

show abstract

“…For several decades, steam methane reforming (SMR) through a catalytic reaction has been commonly used for the production of hydrogen and synthesis gas. Much research has been conducted on the reaction mechanism of SMR; for example, Xu and Froment (1) studied many elementary reactions, whereas Irani et al (2) and Drost et al (3) dealt with reduced or overall reactions.…”

Section: Introductionmentioning

confidence: 99%

“…As this study focuses only on the surface reaction, and also as recommended by Irani et al (2), the catalytic surface reaction is modeled for steam reforming except for the water-gas shift reaction. 8.…”

mentioning

confidence: 99%

Comprehensive Method for Evaluating Reaction Rates of Steam Methane Reforming on Catalyst-Coated Channel Surface with Consideration of Limiting Steps

Lin

Saito

Kojima

et al. 2013

JTST

View full text Add to dashboard Cite

This study presents a method that can be employed to obtain the reaction rate and be widely applied to the simulation of steam methane reforming in a channel with a catalyst on the wall. Prior to the numerical simulation, an experiment was performed in an annular channel, in which the catalyst was deposited on the outer surface of the inner tube. In addition to varying the temperature and composition of the reactants, the velocity was also varied in order to investigate the range where the reaction-limiting condition occurs. Next, the results from the bulk concentration of the products were interpreted to determine the reaction rate of the surface catalyst. The reaction rate was properly introduced into the numerical simulation in two dimensions, although this method for obtaining the reaction rate is generally applied to a field that is supposed to be one-dimensional as a packed catalyst. On the other hand, a discrepancy between the experimental and simulation results was observed at a low velocity. The reason for this was investigated by considering the concentration and profile of the reactants. As a result, we concluded that it was necessary to pay close attention in a case where the amount of the reaction varied with the velocity, because the actual phenomena were controlled by other mechanisms that were not introduced into the numerical simulation.

show abstract

“…Since combustion of fossil fuels releases different greenhouse gases, such as CO 2 , NO x , SO x , and CH 4 that causes global warming effect. Hydrogen can replace these fuels [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of Cerium-Incorporated SBA-16 Supported Ni-Based Oxygen Carrier in Cyclic Chemical Looping Steam Methane Reforming

et al. 2018

View full text Add to dashboard Cite

Hydrogen, as a clean energy carrier, could be produced aided by cyclic oxidation-reduction of oxygen carriers (OCs) in contact with carbonaceous fuel in chemical looping steam methane reforming (CL-SMR) process. In this study, the cerium was incorporated into the SBA-16 support structure to synthesize the Ni/Ce-SBA-16 OC. The supports were synthesized using hydrothermal method followed by impregnation of Ni and characterized via low and wide angle X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), coupled with energy dispersive X-ray (EDX) spectroscopy, and transmission electron micrograph (TEM) techniques. In addition, the effect of various Si/Ce molar ratios (20-60) in the support structure, Ni loading (10-30 wt %), reaction temperature (500-750 • C), and life time of optimal oxygen carrier over 16 cycles were investigated. The results of wide angle XRD and SEM revealed that the incorporation of CeO 2 in the channels of SBA-16 caused the formation of nickel metallic particles with smaller size and prevents the coke formation. The results showed that OC with 15 wt % Ni and Si/Ce molar ratio of 40 (15Ni/Ce-SBA-16(40)) has the best performance when compared with other OCs in terms of catalytic activity and structural properties. The methane conversion of about 99.7% was achieved at 700 • C using 15Ni/Ce-SBA-16(40) OC. We anticipate that the strategy can be extended to investigate a variety of novel modified mesoporous silica as the supporting material for the Ni based OCs.

show abstract

CFD modeling of hydrogen production using steam reforming of methane in monolith reactors: Surface or volume-base reaction model?

Cited by 62 publications

References 28 publications

Deduction of Proper Reaction Rate of Steam Methane Reforming over Catalyst Surface Validated with a Combination of One- and Two-Dimensional Simulations

Deduction of Proper Reaction Rate of Steam Methane Reforming over Catalyst Surface Validated with a Combination of One- and Two-Dimensional Simulations

Comprehensive Method for Evaluating Reaction Rates of Steam Methane Reforming on Catalyst-Coated Channel Surface with Consideration of Limiting Steps

Synthesis and Application of Cerium-Incorporated SBA-16 Supported Ni-Based Oxygen Carrier in Cyclic Chemical Looping Steam Methane Reforming

Contact Info

Product

Resources

About