Effect of flow arrangement on micro membrane reforming for H 2 production from methane

Jiwanuruk, T.; Putivisutisak, Sompong; Ponpesh, Pimporn; Bumroongsakulsawat, Palang; Tagawa, Tetsuya; Yamada, Hiroshi; Assabumrungrat, Suttichai

doi:10.1016/j.cej.2016.02.075

Cited by 14 publications

(3 citation statements)

References 25 publications

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“…In fact, CMRs represent a modern configuration in which an integrated reaction/separation unit has many potential advantages: reduced capital costs, improved yields and selectivity towards hydrogen and drastically reduced downstream separation costs [25,26]. Among CMRs, palladium-based membrane reactors fulfill the requirements to obtain an ultra-pure hydrogen stream (full hydrogen perm-selectivity) suitable for low-temperature fuel cell feeding [9,10,27]. Palladium membranes are among the oldest membranes studied for gas permeation and separation applications and are still the membranes with the highest hydrogen permeability and selectivity [28].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of 2-methoxyethanol steam reforming in a membrane reactor for pure hydrogen production

Hedayati

Llorca

2017

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For the first time, 2-methoxyethanol (C3H8O2) was used for producing pure hydrogen in a catalytic membrane reactor (CMR) via steam reforming (SR). The SR experiments were performed at 923 K and 1–10 bar using a mixture of 2-methoxyethanol (MEX) and water at S/C ratio of 3. Moreover, SR experiments were performed under the same operating conditions using ethylene glycol (EG), methanol (MET), and a mixture of EG + MET, keeping a constant carbon molar flow rate into the CMR to study the reaction pathway through which 2-methoxyethanol is converted to SR products (CH4, CO, CO2, and H2). Hydrogen recovery values of up to 90% and pure hydrogen yields of 0.5 and 0.63 at 10 bar were reached in the case of the steam reforming of MEX and EG + MET, respectively. An outstanding value of 4 mol of pure hydrogen per mol of MEX was obtained at 10 bar. The presence of methanol promoted the SR of EG. The experimental results showed that 2-methoxyethanol is a promising source for producing hydrogen, especially in a CMR where a better efficiency (complete fuel conversion and high hydrogen yield) is reached.Peer ReviewedPostprint (author's final draft

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Section: Introductionmentioning

confidence: 99%

Experimental study of 2-methoxyethanol steam reforming in a membrane reactor for pure hydrogen production

Hedayati

Llorca

2017

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“…Concentration profiles are of great interest to determine local resistance to hydrogen permeation through the membranes of an asymmetric configuration. To a great extent, overall permeate flux driven by concentration gradients is controlled by parameters of asymmetric membrane module such as thickness of layers, pore size, pore volume, pore distribution and other performance requirements [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming

et al. 2021

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The performance of catalytic membrane reactors (CMRs) depends on the specific details of interactions at different levels between catalytic and separation parts. A clear understanding of decisive factors affecting their operational parameters can be provided via mathematical simulations. In the present paper, main results of numerical studies of ethanol steam reforming, followed by downstream hydrogen permeation through an asymmetric supported membrane, are reported. The membrane module consists of a thin selective layer supported on a substrate with graded porous structure. One-dimensional isothermal reaction–transport model for the CMR has been developed, and its validation has been carried out by using performance data from a lab-scale reactor with a disk-shaped membrane. Simulations demonstrate the model’s capabilities to analyze local concentrations gradients, as required to provide accurate estimates of the relationship between structure–property–performance. It was shown that transport properties of multilayer asymmetric membranes are highly related to the structural properties of each single layer.

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“…Over the years, the microchannel reactor has been investigated in many catalytic processes such as Fischer Tropsch [13,14], methane steam reforming [15], carbon-dioxide methanation [16] and dehydrogenation processes [17,18] etc. Besides, methanol synthesis via the microchannel reactor has also been studied for several years ago.…”

Section: Department: Chemical Engineeringmentioning

confidence: 99%

Performance?comparison?of?different?membrane?micro-channel?reactors?for?methanol?production?from?biogas?and?hydrogen

Ountaksinkul

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In order to integrate simultaneous methanol production with biogas upgrading in a single unit, the computational fluid dynamics (CFD) models of a triple pipe tubular membrane reactor (TMR) and a planar membrane micro-structured reactor (MMR) were established via COMSOL Multiphysics 5.3a and compared their effect on reactor performance under predetermined condition. For the conceptual design of these reactors, the channel inside the reactors can be divided into three parts; biogas channel (BC), reaction channel (RC) and sweep gas channel (SC). The CO2 in biogas entering into BC is separated through CO2 selective membrane to produce methanol inside RC. Afterwards, water occurred from the reactions in RC diffuses through water selective membrane to SC in order to shift the reactions to move forward as well as improve methanol production rate. The methanol yield, factor of CO2 and water permeation of MMR provides 28.88, 99.24 and 89.64% which are higher than TMR 18.92, 65.79 and 77.16 %, respectively. In addition, the surface to volume ratio of MMR providing high both heat and mass transfer rate is a key factor affecting to the performance of reactor. For MMR, the operating and design parameters were also investigated. The mass flow ratio of BC to RC (gas flow rate in biogas channel) and WHSV in reaction channel are able to significantly influence to the reactor performance. From the studied ranges, the optimal condition includes inlet temperature of 508.15 K, pressure of 50 bar, WHSV of 20 h-1, BC:RC ratio of 0.5, SC:RC ratio of 4, reactor length of 75 mm and width of 0.5 mm.

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Effect of flow arrangement on micro membrane reforming for H 2 production from methane

Cited by 14 publications

References 25 publications

Experimental study of 2-methoxyethanol steam reforming in a membrane reactor for pure hydrogen production

Experimental study of 2-methoxyethanol steam reforming in a membrane reactor for pure hydrogen production

Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming

Performance?comparison?of?different?membrane?micro-channel?reactors?for?methanol?production?from?biogas?and?hydrogen

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