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Molecules
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Methane Reforming
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Methane Reforming

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Organic Chemistry".

Deadline for manuscript submissions: closed (10 December 2014) | Viewed by 19249

Special Issue Editors

Prof. Dr. Günter Wozny

E-Mail Website
Guest Editor
Chair of Process Dynamics and Operation, Berlin Institute of Technology, Strasse des 17. Juni 135, Sekr. KWT-9, D-10623 Berlin, Germany
Interests: process optimization and operation; process modeling and simulation; integrated processes; information and knowledge management; system dynamics; thermal separation processes
Prof. Dr. Reinhard Schomäcker

E-Mail Website
Guest Editor
Department of Chemistry, Technical University of Berlin, Strasse des 17. Juni 124, 10623 Berlin, Germany
Interests: catalysis; colloids; kinetics; reaction engineering; membrane reactors; microemulsions; asymmetric hydrogenation; hydroformylation; partial oxidation of hydrocarbons
Dr. Hamid Godini

E-Mail Website
Guest Editor
Chair of Process Dynamics and Operation, Berlin Institute of Technology, Strasse des 17. Juni 135, Sekr. KWT-9, D-10623 Berlin, Germany

Special Issue Information

Dear Colleagues,

Methane reforming has been investigated extensively for hydrogen production in various applications from fuel cells up to the syngas production in Fischer-Tropsch synthesis. A significant portion of natural gas conversion is currently operated via industrial-scale steam reforming of methane. Methane reforming can also be accomplished by using carbon dioxide as feedstock, which is known as dry reforming. However, this process needs to be further investigated in order to be exploited on a large scale in a robust individual or integrated reforming process. This specifically includes further investigation and characterization of the proposed catalysts for this process with regard to their stability and resistance against coke formation. Another important aspect of the methane reforming reaction is its strongly endothermic character. Addressing this aspect has been the main motivation for combining this endothermic reaction with exothermic oxidative methane conversion processes, such as partial oxidation and methane or oxidative coupling reactions in autothermal or thermally integrated reactors. The hydrogen/carbon-oxide ratio in the resulted gas stream can be well controlled in such integrated systems so that the desired final and intermediate products, such as dimethyl-ether and methanol, can be produced. For the process-scale, it is also crucial to have an efficient heat-integration to improve the energy efficiency and economy of this process. Therefore, along with investigating the significant potential for improving the performance of the methane reforming reactor via designing novel and efficient reactors and integrated reactor systems, there should be a review of general perspectives of the process design with regard to energy, economical aspects and its potential to be integrated with other processes. Especially in this context, introducing and analyzing the efficient separation techniques can play a major role.

Research articles covering all areas of catalyst, reactor, process-scale analysis of methane reforming, such as novel integrated reactor and process systems, energy and economic analysis, catalyst characteristics and kinetic studies, are very welcome for inclusion in this Special Issue of Molecules.

Prof. Dr. Günter Wozny
Prof. Dr. Reinhard Schomäcker
Dr. Hamid Reza Godini
Guest Editors

Submission

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed Open Access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs).


Keywords

  • steam methane reforming
  • partial oxidation
  • OCM (Oxidative Coupling of Methane)
  • Syngas-Methanol-Olefin
  • dry methane reforming
  • autothermal reactor
  • integrated reactor systems
  • industrial-research barriers
  • thermal-reaction engineering
  • catalyst characteristics
  • process design
  • energy and economic analysis

Published Papers (2 papers)

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Research

1267 KiB  
Article
Auto-Thermal Reforming Using Mixed Ion-Electronic Conducting Ceramic Membranes for a Small-Scale H2 Production Plant
by Vincenzo Spallina, Tommaso Melchiori, Fausto Gallucci and Martin Van Sint Annaland
Molecules 2015, 20(3), 4998-5023; https://doi.org/10.3390/molecules20034998 - 18 Mar 2015
Cited by 10 | Viewed by 8706
Abstract
The integration of mixed ionic electronic conducting (MIEC) membranes for air separation in a small-to-medium scale unit for H2 production (in the range of 650–850 Nm3/h) via auto-thermal reforming of methane has been investigated in the present study. Membranes based [...] Read more.
The integration of mixed ionic electronic conducting (MIEC) membranes for air separation in a small-to-medium scale unit for H2 production (in the range of 650–850 Nm3/h) via auto-thermal reforming of methane has been investigated in the present study. Membranes based on mixed ionic electronic conducting oxides such as Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) give sufficiently high oxygen fluxes at temperatures above 800 °C with high purity (higher than 99%). Experimental results of membrane permeation tests are presented and used for the reactor design with a detailed reactor model. The assessment of the H2 plant has been carried out for different operating conditions and reactor geometry and an energy analysis has been carried out with the flowsheeting software Aspen Plus, including also the turbomachines required for a proper thermal integration. A micro-gas turbine is integrated in the system in order to supply part of the electricity required in the system. The analysis of the system shows that the reforming efficiency is in the range of 62%–70% in the case where the temperature at the auto-thermal reforming membrane reactor (ATR-MR) is equal to 900 °C. When the electric consumption and the thermal export are included the efficiency of the plant approaches 74%–78%. The design of the reactor has been carried out using a reactor model linked to the Aspen flowsheet and the results show that with a larger reactor volume the performance of the system can be improved, especially because of the reduced electric consumption. From this analysis it has been found that for a production of about 790 Nm3/h pure H2, a reactor with a diameter of 1 m and length of 1.8 m with about 1500 membranes of 2 cm diameter is required. Full article
(This article belongs to the Special Issue Methane Reforming)
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994 KiB  
Article
Ni-SiO2 Catalysts for the Carbon Dioxide Reforming of Methane: Varying Support Properties by Flame Spray Pyrolysis
by Emma C. Lovell, Jason Scott and Rose Amal
Molecules 2015, 20(3), 4594-4609; https://doi.org/10.3390/molecules20034594 - 12 Mar 2015
Cited by 62 | Viewed by 10101
Abstract
Silica particles were prepared by flame spray pyrolysis (FSP) as a support for nickel catalysts. The impact of precursor feed rate (3, 5 and 7 mL/min) during FSP on the silica characteristics and the ensuing effect on catalytic performance for the carbon dioxide, [...] Read more.
Silica particles were prepared by flame spray pyrolysis (FSP) as a support for nickel catalysts. The impact of precursor feed rate (3, 5 and 7 mL/min) during FSP on the silica characteristics and the ensuing effect on catalytic performance for the carbon dioxide, or dry, reforming of methane (DRM) was probed. Increasing the precursor feed rate: (i) progressively lowered the silica surface area from ≈340 m2/g to ≈240 m2/g; (ii) altered the silanol groups on the silica surface; and (iii) introduced residual carbon-based surface species to the sample at the highest feed rate. The variations in silica properties altered the (5 wt %) nickel deposit characteristics which in turn impacted on the DRM reaction. As the silica surface area increased, the nickel dispersion increased which improved catalyst performance. The residual carbon-based species also appeared to improve nickel dispersion, and in turn catalyst activity, although not to the same extent as the change in silica surface area. The findings illustrate both the importance of silica support characteristics on the catalytic performance of nickel for the DRM reaction and the capacity for using FSP to control these characteristics. Full article
(This article belongs to the Special Issue Methane Reforming)
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