Integrated autothermal oxidative coupling and steam reforming of methane. Part 2: Development of a packed bed membrane reactor with a dual function catalyst

Thermochemical Packed-Bed (TPB) reformer has been substantially studiedin the past years as a promising equipment to investigate thethermochemical conversion of methane (CH4). This work has as mainobjective a theoretical modelling to describe the process variables of SteamReforming of Methane (SRM) method in the TPB reformer. The TPBreformer is filled with β-SiC open-cell foam where the thermochemicalconversion of CH4 is carried out. The model variables describe the specificaims of work and these objectives can be identified from each equation ofthe developed mathematical model. This work has been proposed to studytwo specific aims as (i) the effective thermal conductivity's effect of thesolid phase (λs,eff.) and (ii) molar flows of chemical components. Theendothermic reaction temperature's profiles are notably increased as thenumeral value of λs,eff. is raised. The Steam Reforming of Methane (SRM)method is suggested to improve the Production Rate (PR) of H2 regardingthe PR of CO. As results, the PR of H2 is of 29.48% while the PR of CO isof 2.76%.

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Proposing a novel theoretical optimized model for the combined dry and steam reforming of methane in the packed-bed reactors

Chemical Papers ◽

10.1007/s11696-019-00782-1 ◽

2019 ◽

Vol 73 (9) ◽

pp. 2309-2328 ◽

Cited By ~ 1

Author(s):

Naser Lotfi ◽

Habib Ale Ebrahim ◽

Mohammad Javad Azarhoosh

Keyword(s):

Steam Reforming ◽

Packed Bed ◽

Packed Bed Reactors ◽

Optimized Model ◽

Steam Reforming Of Methane

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Steam reforming of methane in a bench-scale membrane reactor at realistic working conditions

Catalysis Today ◽

10.1016/j.cattod.2012.04.009 ◽

2012 ◽

Vol 193 (1) ◽

pp. 74-80 ◽

Cited By ~ 42

Author(s):

Marija Sarić ◽

Yvonne C. van Delft ◽

Raghavendra Sumbharaju ◽

Dick F. Meyer ◽

Arend de Groot

Keyword(s):

Working Conditions ◽

Steam Reforming ◽

Membrane Reactor ◽

Bench Scale ◽

Steam Reforming Of Methane

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Comprehensive Study of Steam Reforming of Methane in Membrane Reactors

Journal of Energy Resources Technology ◽

10.1115/1.4032733 ◽

2016 ◽

Vol 138 (5) ◽

Cited By ~ 5

Author(s):

Özgün Yücel ◽

Mehmet Alaittin Hastaoglu

Keyword(s):

Steam Reforming ◽

Membrane Reactor ◽

Design Parameters ◽

Large Temperature ◽

Efficient Production ◽

Gas Mixing ◽

Concentration Gradients ◽

Production Of Hydrogen ◽

Simulation Results ◽

Steam Reforming Of Methane

A 2D model and heat transfer mechanism are proposed to analyze and study oxidative steam reforming of methane (OSRM) in a membrane reactor. The model describes mass and thermal dispersions for gas and solid phases. It also accounts for transport through the membrane. The effects of operating parameters on methane conversion and H2 yield are analyzed. The parameters considered are the bed temperature (800–1100 K), molar oxygen-to-carbon ratio (0.0–0.5), and steam-to-carbon ratio (1–4). The results show that our model prevents overestimation and provides valuable additional information about temperature and concentration gradients in membrane reactor which is not available in a simple one-dimensional approach. Simulation results show that large temperature and concentration gradients cannot be avoided. The particle properties and the bed diameter have a considerable effect on the extent of gas mixing. Effective gas mixing coefficient also increases with increasing gas and solid velocity. In membrane reactor, simulation results show that mixing which depends on operational and design parameters has a strong effect on the hydrogen conversion. Also, the removal of hydrogen with membranes breaks equilibrium barrier leading to efficient production of hydrogen, reduced reactor size, and tube lengths. The model can be used in real-time simulation of industrial reactors for control and optimization purposes.

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