Effect of catalyst distribution in a membrane reactor: Experiments and model

Szegner, J.; Yeung, King Lun; Varma, Arvind

doi:10.1002/aic.690430814

Cited by 35 publications

(21 citation statements)

References 32 publications

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“…Improved reaction performance had been reported for membrane reactors using membrane separators [44] and contactors [45]. Combining the two membrane processes in a single reactor unit is expected to provide a greater flexibility of operation as well as further enhancement in the reaction performance.…”

Section: Novel Membrane Reactor For Ozonolysis Of Organic Pollutantsmentioning

confidence: 98%

A novel membrane reactor for ozone water treatment

Heng

Yeung

Djafer³

et al. 2007

Journal of Membrane Science

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Section: Novel Membrane Reactor For Ozonolysis Of Organic Pollutantsmentioning

confidence: 98%

A novel membrane reactor for ozone water treatment

Heng

Yeung

Djafer³

et al. 2007

Journal of Membrane Science

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“…Szegner. et al [37] reported EDH PBMR with composite alumina membrane with Pt-Sn/Al2O3. The ethane conversion of 16% in the PBMR was higher than that of 8% in the PBR and ethylene selectivity of the PBMR was 99% at 550 o C.…”

Section: Review For Edhmentioning

confidence: 99%

“…Methane is one of the main byproducts in the EDH reaction. Methanation reaction is endothermic and therefore high temperature favors the methanation reaction [45]. The selectivity of methane was examined for both PBR and PBMR operation modes at 500-600 °C.…”

Section: Methanationmentioning

confidence: 99%

High-temperature ethane dehydrogenation in microporous zeolite membrane reactor: Effect of operating conditions

Dangwal

Liu

Kim

2017

Chemical Engineering Journal

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Ethylene is the largest base chemical for the chemical industry and produced either by cracking or dehydrogenation of light alkanes. The increasing demand for ethylene has stimulated substantial research into the development of new processes to reduce energy consumption. The ethane dehydrogenation reaction (EDH) using a membrane reactor is an attractive solution because the equilibrium limit can be overcome in favor of ethylene by selective removal of H2. The process intensification of EDH reaction was studied in packed-bed membrane reactors (PBMR) operating with a Pt/Al2O3 catalyst. The effects of MFI-type zeolite PBMR and operating conditions on ethane conversion, ethylene selectivity, and ethylene yield were investigated. MFI membrane reactors allowed the equilibrium limit of ethane conversion to be surpassed at high temperatures. It was demonstrated that medium-pore MFI membranes with moderate H2/C2H6 selectivity can effectively improve ethane conversion at high operation temperature by timely removal of H2 through the membranes. The experiment results showed that using MFI zeolite membrane with separation factor of 3.3 for H2/C2H6 and H2 permeance of 1.2 × 10 −7 mol m-2 s-1 Pa-1 at 600 °C helped in enhancing the ethane conversion, ethylene selectivity and ethylene yield from 12%, 86 %, and 10% for the packed bed reactor (P BR) to 24%, 90% and 22% for the PBMR respectively. The model calculations have shown that near-completion ethane conversion > 98% may be achieved under practically meaningful operating temperature, pressure, and space velocity even for membranes with moderate H2 selectivity and permeance.

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“…Vitulli et al, 1997). By the way, further studies at Notre Dame (Szegner et al, 1997) pointed out, from both an experimental and a theoretical point of view, how catalyst distribution e!ects within the pellets of a packed-bed enclosed in a inert membrane reactor can also a!ect the overall reactor performance, by using ethane dehydrogenation over Pt supported catalysts as a test reaction. As expected, the reactor performance was maximised when the catalyst was placed on the outer shell of the pellets and when permeation of reactant through sol}gel derived alumina membranes was kept low enough without decreasing too much hydrogen permeation.…”

Section: Reactions and Reactorsmentioning

confidence: 99%

“…# Yeung et al (1994), Vitulli et al (1997) and Szegner et al (1997) Chemical engineering Understanding and modelling highly-selective transport mechanisms.…”

mentioning

confidence: 99%

High-temperature membrane reactors: potential and problems

Saracco

Neomagus

Versteeg

et al. 1999

Chemical Engineering Science

228

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The most recent literature in the "eld of membrane reactors is reviewed, four years after an analogous e!ort of ours (Saracco et al., 1994), describing shortly the potentials of these reactors, which now seem to be well established, and focusing mostly on problems towards practical exploitation. Since 1994, progress has been achieved in several areas (sol}gel deposition of defect free sol}gel derived membranes, reduction in thickness of Pd membranes, synthesis of zeolite membranes) whereas stagnation was noticed in some others (high-temperature sealing of membranes into modules, scaling-up of membrane reactor, etc.). As a result, despite the still increasing research e!orts, industrial application does not seem to be round the corner, yet. However, several non-permselective membrane reactor opportunities with currently available membranes might pave the way for more sophisticated applications.

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Effect of catalyst distribution in a membrane reactor: Experiments and model

Cited by 35 publications

References 32 publications

A novel membrane reactor for ozone water treatment

A novel membrane reactor for ozone water treatment

High-temperature ethane dehydrogenation in microporous zeolite membrane reactor: Effect of operating conditions

High-temperature membrane reactors: potential and problems

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