Optimization of the simulated countercurrent moving-bed chromatographic reactor for the oxidative coupling of methane

Kruglov, Alexey V.; Bjorklund, Mark C.; Curr, Robert W.

doi:10.1016/0009-2509(96)00179-0

Cited by 33 publications

(24 citation statements)

References 4 publications

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“…According to computer simulation, a methane to oxygen ratio of ca. 1.4 gives the maximum yield of ethane and ethylene [78]. Accordingly, high methane conversion can be achieved in steady-state operation.…”

Section: Applications Of Gas Chromatographic Reactorsmentioning

confidence: 98%

“…Optimization criteria of an SMB chromatographic reactor that can be reached in a single fixed-bed tubular reactor, a simulated moving bed chromatographic reactor can be used [79,80]. Hydrophobic carbon molecular sieve and YBa 2 Zr 3 O 9.5 have proved to be a suitable adsorbent and catalyst, respectively [78,83].…”

Section: Applications Of Gas Chromatographic Reactorsmentioning

confidence: 99%

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Chromatographic Reactors

Fricke¹,

Schmidt–Traub²,

Schembecker³

2008

Ullmann's Encyclopedia of Industrial Chemistry

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Chromatographic reactors integrate chemical reaction and chromatographic separation in one apparatus. This offers potential for process intensification, especially in the case of equilibrium reactions. Different types of discontinuous and continuous processes as well as modeling of chromatographic reactors are described. Synthesis and design of this processes is very much influenced and often restricted by the type of reaction and the operating window which is set by the individual operating conditions for chemical reaction, mass separation, and equipment design. Integrated chromatographic reactors should be considered if chromatography is the favored separation process for a conventional sequential process design. Preparative chromatographic reactors are known for liquid‐ and gas‐phase processes. Laboratory‐scale applications are described. Analytical chromatographic reactors are used to determine reaction rate constants and kinetics, and to screen chromatographic systems and operating conditions for preparative applications. 1. Introduction 2. Types of Chromatographic Reactors 3. Modeling of Chromatographic Reactors 3.1. Adsorption Isotherm and Reaction Kinetics 3.2. Modeling the BCR 3.3. Modeling Simulated Moving Bed Chromatographic Reactors 3.4. Process control 4. Synthesis of Preparative Chromatographic Reactors 4.1. Process Principles 4.2. Type of Reaction 5. Design of Preparative Chromatographic Reactors 5.1. Design of the Process 5.2. Choice of Operating Conditions 6. Preparative Chromatographic Reactors 6.1. Applications of Gas Chromatographic Reactors 6.2. Application of Liquid Chromatographic Reactors 7. Analytical Chromatographic Reactors 7.1. Determination of Rate Constants 7.2. Enzymatic Reactions 7.3. Characterization of the Stationary Phase 7.4. Examination of Fast Equilibrium Reactions 7.5. Examination of Solvent Effects

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Section: Applications Of Gas Chromatographic Reactorsmentioning

confidence: 98%

Section: Applications Of Gas Chromatographic Reactorsmentioning

confidence: 99%

Chromatographic Reactors

Fricke¹,

Schmidt–Traub²,

Schembecker³

2008

Ullmann's Encyclopedia of Industrial Chemistry

View full text Add to dashboard Cite

show abstract

“…Kruglov et al [165] studied the oxidative coupling of methane. This is a rather complex process consisting of four reactions leading to ethane and ethylene as desired products considered together as C 2 , as well as to CO and CO 2 as byproducts.…”

Section: Simulated Moving Bed Reactors (Smbr)mentioning

confidence: 99%

Chromatographic Reactors Based on Biological Activity

Podgornik

Tennikova

2002

Advances in Biochemical Engineering/Biotechnology

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In the last decade there were many papers published on the study of enzyme catalyzed reactions performed in so-called chromatographic reactors. The attractive feature of such systems is that during the course of the reaction the compounds are already separated, which can drive the reaction beyond the thermodynamic equilibrium as well as remove putative inhibitors. In this chapter, an overview of such chromatographic bioreactor systems is given. Besides, some immobilization techniques to improve enzyme activity are discussed together with modern chromatographic supports with improved hydrodynamic characteristics to be used in this context.

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“…Control of temperature, residence time and its distribution depends strongly on the structure and geometry of the catalytic reactor. Even though many studies have been carried out for formulating catalysts to achieve high methane conversion together with improved product selectivity and ethylene yield, the number of studies addressing the effect of reactor type and structure is scarce . The very first reactors used to test OCM were packed‐bed type, which led to the formation of axial and radial temperature gradients in the reactor due to the high exothermicity .…”

Section: Introductionmentioning

confidence: 99%

“…The same authors also concluded that, in an industrial fluidized-bed reactor, C 2 yields will be lower when compared with a lab-scale reactor, due to larger contact times. 6 Kruglov et al 7 proposed a countercurrent moving bed chromatographic reactor for separating C 2 hydrocarbons during the reaction and reported 75% methane conversion and 55% C 2 yield. Even though these values were promising, the reactor configuration seemed not to be economically feasible due to high cost of recycling unconverted methane.…”

Section: Introductionmentioning

confidence: 99%

Parametric investigation of oxidative coupling of methane in a heat‐exchange integrated microchannel reactor

Tezcan

Avcı

2014

J of Chemical Tech & Biotech

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BACKGROUND Oxidative coupling of methane (OCM) to C2 hydrocarbons is strongly exothermic and requires careful management of the dissipated heat. Running OCM in microchannel reactors offers fast heat transfer rates that enable controlled distribution of reaction temperature and product composition. This study involves modeling and simulation of OCM in a heat exchange integrated microchannel reactor involving parallel reaction and cooling channels separated by solid walls. RESULTS Using separating wall with high thermal conductivity and thickness above 5 × 10‐4 m regulates temperature distribution along the reaction channel and improves C2 yield. Increasing the methane‐to‐oxygen ratio decreases the reaction temperature and conversion immediately. Coolant inlet temperature affects the trade‐off between methane conversion and selective production of ethane and ethylene. Exothermic heat release and C2 hydrocarbon loss by oxidation are pronounced at higher reactant mass flow rates, whereas C2 yield is improved at higher coolant mass flow rates that dampen the reaction temperature. CONCLUSION Effective heat transfer and improved temperature control can be obtained in the microchannel geometry. The results provide insight into the potential use of microreactors, novel units known to have robust heat transfer properties, in controlling the temperature of the OCM process, which is one of the key design targets affecting product selectivity. © 2014 Society of Chemical Industry

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Optimization of the simulated countercurrent moving-bed chromatographic reactor for the oxidative coupling of methane

Cited by 33 publications

References 4 publications

Chromatographic Reactors

Chromatographic Reactors

Chromatographic Reactors Based on Biological Activity

Parametric investigation of oxidative coupling of methane in a heat‐exchange integrated microchannel reactor

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