Comparison between parallel and checked arrangements of micro reformer for H2 production from methane

Jiwanuruk, T.; Putivisutisak, Sompong; Ponpesh, Pimporn; Kositanont, C.; Tagawa, Tetsuya; Yamada, Hiroshi; Fukuhara, Choji; Assabumrungrat, Suttichai

doi:10.1016/j.cej.2015.01.049

Cited by 17 publications

(7 citation statements)

References 30 publications

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“…The exploration of efficient and safe production, storage, and transportation (especially in long term) of H 2 , an ultra‐low density and awfully low‐boiling point gas, 11–15 is a serious challenge 16–20 . Consequently, numerous inorganic and organic compounds have been proposed as hydrogen carriers, such as methanol, 21 ammonia, 22,23 methane, 24 ammonia borane, 3,25–29 hydrazine hydrate, 30 dimethylaminoborane, 31 sodium borohydride, 3,32–37 tetrahydroxydi‐boron, 38–41 tetramethyldisiloxane, 42 hydrazine borane, 43 and formic acid (FA) 44–46 . Among them, FA, the main product of biomass manufacture by hydrolysis or oxidation of cellulose with high yields, 47–50 has become one of the most attractive hydrogen carriers due to its excellent hydrogen content (4.4 wt%), high volumetric hydrogen storage density of 53 g/L, nontoxicity, ease of portability, regeneration from CO 2 hydrogenation, and liquid stability at room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8][9][10] The exploration of efficient and safe production, storage, and transportation (especially in long term) of H 2 , an ultralow density and awfully low-boiling point gas, [11][12][13][14][15] is a serious challenge. [16][17][18][19][20] Consequently, numerous inorganic and organic compounds have been proposed as hydrogen carriers, such as methanol, 21 ammonia, 22,23 methane, 24 ammonia borane, 3,[25][26][27][28][29] hydrazine hydrate, 30 dimethylaminoborane, 31 sodium borohydride, 3,[32][33][34][35][36][37] tetrahydroxydiboron, [38][39][40][41] tetramethyldisiloxane, 42 hydrazine borane, 43 and formic acid (FA). [44][45][46] Among them, FA, the main product of biomass manufacture by hydrolysis or oxidation of cellulose with high yields, [47][48][49]…”

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confidence: 99%

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“On–off” switch for H₂ and O₂ generation from HCOOH resp. H₂O₂

Huang

et al. 2022

Carbon Energy

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In spite of the numerous advances in the development of H 2 and O 2 evolutions upon water splitting, the separation of H 2 from O 2 still remains a severe challenge. Herein, the novel dual-functional nanocatalysts Pd/ carbon nanosphere (CNS), obtained via immobilization of ultrafine Pd nanoparticles onto CNS, are developed and employed for both selective H 2 generation from HCOOH dehydrogenation and O 2 evolution from H 2 O 2 decomposition. In these reactions, the highest activities for Pd/CNS-800 (i.e., calcinated at 800°C) are 2478 h −1 and 993 min −1 for H 2 and O 2 evolution, respectively. The highly efficient and selective "on-off" switch for selective H 2 generation from HCOOH is successfully realized by pH adjustment. This novel and highly efficient nanocatalyst Pd/CNS-800 not only provides new approaches for the promising application of HCOOH and H 2 O 2 as economic and safe H 2 and O 2 carriers, respectively, for fuel cells, but also promotes the development of "on-off" switch for ondemand H 2 evolution.carbon nanospheres, H 2 generation, O 2 evolution, "on-off" switch, Pd nanoparticles | INTRODUCTIONSince the H 2 -O 2 fuel cell was first discovered by Grove in 1839, 1 it has been widely deemed as the most potential portable and auxiliary power generator because of its merits of green, simple structure, wide operating temperature range, high specific energy, and high energy conversion efficiency. Although H 2 and O 2 are easily produced by water electrolysis, 2-5 it is difficult to find ideal catalysts for this reaction and to separate H 2 from Carbon Energy.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

“On–off” switch for H₂ and O₂ generation from HCOOH resp. H₂O₂

Huang

et al. 2022

Carbon Energy

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“…Thus, the optimal washcoat was found to be around 75 μm for 10% Ni catalyst. On the other hand, improving reactor design targets also to provide optimal thermal conditions due to the endothermic nature of SMR, such as the arrangement of catalyst deposition, [21][22][23] and exothermic/endothermic reaction combination. [24][25][26] In the same perspectives, the catalyst deposition and arrangement at catalytic reactor's walls are interesting paths of research to reach high H 2 production yields.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of methane‐fueled reactor for hydrogen production: Experimental permeability measurements and reactive flow modeling

Settar

Perazzo

Chetehouna

2022

Intl J of Energy Research

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In this research, an evaluation of the performance improvement of a new reactor configuration for steam methane reforming (SMR) is carried out through a numerical-experimental approach. Two configurations of M-PCR have been studied numerically to compare the benefits. The first one consists of a conventional micro planar cell reactor (noted clear M-PCR), which is impregnated in its central axis in the direction of gas mixture flow by Ni/Al 2 O 3 catalyst. The second M-PCR configuration is equipped with nickel-based metal foam (MF) (noted M-PCR MF), which supports similar catalyst layer as for clear M-PCR configuration. The same operating conditions and catalyst weight density are set. 2D numerical solution of the transport equations was performed with a homemade code based on FORTRAN language to explore the heat and mass transfer during the SMR process. To better evaluate the nickel-based MF effects, permeability coefficients, that is, Darcy and inertial coefficients, were first measured using an experimental bench for hydrodynamic characterization of porous media. Comparison has showed that M-PCR MF configuration provides a significant enhancement in terms of hydrogen yield (73,25%). Furthermore, the catalyst layer length could be reduced by four times compared to conventional M-PCR due to MF implementation, leading to important economic improvement while keeping an interesting SMR efficiency.

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“…Previous studies on microchannel reactors can be categorized into the geometry of channels and the heating process in the reactor. A comparative study was performed by Jiwanuruk et al, who compared parallel and checked geometric patterns for combustion and reforming channels using methane. They compared the results of both arrangements in terms of methane conversion.…”

Section: Introductionmentioning

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

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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.

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Comparison between parallel and checked arrangements of micro reformer for H2 production from methane

Cited by 17 publications

References 30 publications

“On–off” switch for H₂ and O₂ generation from HCOOH resp. H₂O₂

“On–off” switch for H₂ and O₂ generation from HCOOH resp. H₂O₂

Performance evaluation of methane‐fueled reactor for hydrogen production: Experimental permeability measurements and reactive flow modeling

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

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Comparison between parallel and checked arrangements of micro reformer for H2 production from methane

Cited by 17 publications

References 30 publications

“On–off” switch for H2 and O2 generation from HCOOH resp. H2O2

“On–off” switch for H2 and O2 generation from HCOOH resp. H2O2

Performance evaluation of methane‐fueled reactor for hydrogen production: Experimental permeability measurements and reactive flow modeling

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

Contact Info

Product

Resources

About

“On–off” switch for H₂ and O₂ generation from HCOOH resp. H₂O₂

“On–off” switch for H₂ and O₂ generation from HCOOH resp. H₂O₂