Enhanced decomposition of sulfur trioxide in the water-splitting iodine–sulfur process via a catalytic membrane reactor

2016 ◽  
Vol 4 (40) ◽  
pp. 15316-15319 ◽  
Author(s):  
Lie Meng ◽  
Masakoto Kanezashi ◽  
Xin Yu ◽  
Toshinori Tsuru
Keyword(s):  
Water Splitting ◽  
Sulfur Trioxide ◽  
Membrane Reactor ◽  
Molecular Size ◽  
Membrane Reactors ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
First Report ◽  
Catalytic Membrane Reactors

We achieved an enhanced conversion in SO3 decomposition via catalytic membrane reactors at 600 °C and provided the first report on the molecular size of the SO3 molecule.

Tailoring of La0.8Ce0.1Ni0.4Ti0.6O3-δ catalyst interlayer via in-situ exsolution for catalytic membrane reactor

2021 ◽  
Author(s):  
Ping Luo ◽  
Zhi Xu ◽  
Qiankun Zheng ◽  
Jinkun Tan ◽  
Zhicheng Zhang ◽  
...  
Keyword(s):  
Membrane Reactor ◽  
Membrane Reactors ◽  
Catalytic Membrane ◽  
Membrane Material ◽  
Catalytic Membrane Reactor ◽  
Permeable Membrane ◽  
A Site ◽  
Catalytic Membrane Reactors ◽  
Perovskite Type

The application of catalytic membrane reactors (CMRs) based on perovskite-type oxygen-permeable membrane has been greatly limited by the instability of membrane material. In this study, A-site deficient perovskite La0.8Ce0.1Ni0.4Ti0.6O3-δ (LCNT)...

scholarly journals Modeling of ethylbenzene dehydrogenation in catalytic membrane reactor with porous membrane

2014 ◽  
Vol 2 (1) ◽  
pp. 1-9 ◽  
Author(s):  
E.V. Shelepova ◽  
A.A. Vedyagin ◽  
I.V. Mishakov ◽  
A.S. Noskov
Keyword(s):  
Mathematical Model ◽  
Membrane Reactor ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Porous Membrane ◽  
Membrane Reactors ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
Membrane Pore ◽  
Ethylbenzene Dehydrogenation

AbstractThe modeling of ethylbenzene dehydrogenation in a catalytic membrane reactor has been carried out for porous membrane by means of two-dimensional, non-isothermal stationary mathematical model. A mathematical model of the catalytic membrane reactor was applied, in order to study the effects of transport properties of the porous membrane on process performance. The performed modeling of the heat and mass transfer processes within the porous membrane, allowed us to estimate the efficiency of its use in membrane reactors, in comparison with a dense membrane (with additional oxidation of the hydrogen in shell side). The use of a porous ceramic membrane was found to cause an increase of the ethylbenzene conversion at 600°C, up to 93 %, while the conversion in the case of conventional reactor was 67%. In this work, we defined the key parameter values of porous membrane (pore diameter and thickness) for ethylbenzene dehydrogenation in catalytic membrane reactor, at which the highest conversion of ethylbenzene and styrene selectivity can be reached.

A Comprehensive Model for Catalytic Membrane Reactor

2006 ◽  
Vol 4 (1) ◽  
Author(s):  
Shashi Kumar ◽  
Sukrit Shankar ◽  
Pushan R. Shah ◽  
Surendra Kumar
Keyword(s):  
Membrane Reactor ◽  
Multicomponent Diffusion ◽  
Membrane Reactors ◽  
Catalytic Dehydrogenation ◽  
Inorganic Membranes ◽  
Comprehensive Model ◽  
Catalytic Membrane ◽  
Analysis And Design ◽  
Tubular Membrane ◽  
Catalytic Membrane Reactors

Catalytic membrane reactors are multifunctional reactors, which provide improved performance over conventional reactors. These are used mainly for conducting hydrogenation/ dehydrogenation reactions, and synthesis of oxyorganic compounds by using inorganic membranes. In this paper, comprehensive model has been developed for a tubular membrane reactor, which is applicable to Pd or Pd alloys membrane, porous inorganic membranes. The model accounts for the reaction on either side, tube or shell, isothermal and adiabatic conditions, reactive and non reactive sweep gas, multicomponent diffusion through gas films on both sides of membrane, and pressure variations. Equations governing the diffusion of gaseous components through stagnant gas film, and membranes have been identified and described. The model has been validated with the experimental results available in literature. By using the developed model catalytic dehydrogenation of ethylbenzene to produce styrene in a tubular membrane reactor have been simulated. Four catalysts available for this reaction have been evaluated for their performance. It is our view that the model may be used to develop general purpose software for the analysis and design of tubular catalytic membrane reactors through numerical simulation.

Dense Palladium and Perovskite Membranes and Membrane Reactors

MRS Bulletin ◽  
1999 ◽  
Vol 24 (3) ◽  
pp. 46-49 ◽  
Author(s):  
Yi Hua Ma
Keyword(s):  
High Temperature ◽  
Membrane Reactor ◽  
Packed Bed ◽  
Ceramic Membranes ◽  
Thin Layers ◽  
Membrane Reactors ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
Porous Support ◽  
Catalytically Active

The development of high-temperature processes and tighter environmental regulations requires utilization of efficient gas-separation processes that will provide high fluxes, high selectivity of separation, and the ability to operate at elevated temperatures. Dense inorganic membranes and membrane reactors are especially well suited for high-temperature reactions and separations, due in part to their thermal stability and high separation selectivity (in theory, infinite). Furthermore, membrane reactors offer an inherent advantage of combining reaction, product concentration, and separation in a single-unit operation for the improvement of process economics and waste minimization.The classification of membrane reactors can either be by membrane material and geometry or by the configuration of the reactor. Porous and dense membranes in both tubular and disk forms have been used for membrane reactors. The membrane can either be catalytically active (catalytic membrane reactor [CMR]) or simply act as a separation medium. In the latter case, the catalyst is packed in the reactor, whose walls are formed by the membrane (packed-bed membrane reactor [PBMR]). In addition, if the membrane is also catalytically active, the reactor is called a packed-bed catalytic membrane reactor (PBCMR).The principal materials from which porous inorganic (ceramic) membranes are made are alumina, zirconia, and glass. Alumina and zirconia membranes are usually asymmetric and composite, with a porous support (0.5–2.0 mm thick) for mechanical strength and one or more thin layers for carrying out separations.On the other hand, glass membranes, such as Vycor and microporous glass, have symmetric pores. Materials commonly used as the porous support are alumina, granular carbon, sintered metal, and silicon carbide.

The selective oxidation of benzyl alcohol using a novel catalytic membrane reactor

2002 ◽  
Vol 4 (5) ◽  
pp. 459-460 ◽  
Author(s):  
David W. Hall ◽  
Georgia Grigoropoulou ◽  
James H. Clark ◽  
Keith Scott ◽  
Roshan J. J. Jachuck
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Membrane Reactor ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactor ◽  
Oxidation Of Benzyl Alcohol

Evaluation of perovskites in hollow fibre and disk geometry in catalytic membrane reactors and in oxygen separators

2006 ◽  
Vol 118 (1-2) ◽  
pp. 128-135 ◽  
Author(s):  
J. Caro ◽  
H.H. Wang ◽  
C. Tablet ◽  
A. Kleinert ◽  
A. Feldhoff ◽  
...  
Keyword(s):  
Hollow Fibre ◽  
Membrane Reactors ◽  
Catalytic Membrane ◽  
Catalytic Membrane Reactors
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