Special Issue "Membrane and Membrane Reactors Operations in Chemical Engineering"

A special issue of ChemEngineering (ISSN 2305-7084).

Deadline for manuscript submissions: 31 December 2018

Special Issue Editor

Guest Editor
Dr. Adolfo Iulianelli

Institute on Membrane Technology of the Italian National Research Council (CNR-ITM), via P. Bucci Cubo 17/C c/o University of Calabria, Rende, CS 87036, Italy
E-Mail
Interests: Membrane reactors; Membrane technology in gas separation; Hydrogen production and reforming reactions; CO2 capture and Fuel Cells

Special Issue Information

Dear Colleagues,

The principles of the Process Intensification Strategy, applied to chemical engineering, can lead to the development and re-design of new processes that are more compact, efficient, and useful for better-exploiting renewable materials, as well as a lower energy consumption and reduced plant volume. Membrane technology contributes to the valorization of these principles and, in the last few years, the potentialities of membrane operations have been largely recognized.

With their intrinsic behaviors of efficiency and operational simplicity, high selectivity and permeability, compatibility between different membrane operations in integrated systems, low energetic requirement, good stability under operating conditions and environment compatibility, membrane operations represent an interesting and alternative approach in chemical engineering processes. Membrane gas separation, membrane distillation, membrane crystallizers, membrane contactors, membrane strippers and scrubbers, and, in particular, membrane reactors and membrane bioreactors in their various configurations and functionalities, are growing in parallel to the molecular separations realized with pressure driven membrane operations.

Within this context, this Special Issue aims at compiling relevant contributions showing the potentialities of membrane and membrane reactors operations in chemical engineering based on the application of the Process Intensification principles. Modeling and experimental manuscripts, as well as reviews dealing with the most significative processes in chemical engineering performed via membrane and membrane reactors operations, are particularly welcome.

Dr. Adolfo Iulianelli
Guest Editor

Manuscript Submission Information

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. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short 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 thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. ChemEngineering is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) is waived for well-prepared manuscripts submitted to this issue. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • membrane gas separation
  • membrane reactors and bioreactors
  • membrane crystallization
  • membrane distillation and waste water treatment
  • membrane emulsifier
  • membrane operations in food applications

Published Papers (2 papers)

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Open AccessArticle Experimental Investigation of the Gas/Liquid Phase Separation Using a Membrane-Based Micro Contactor
ChemEngineering 2018, 2(4), 55; https://doi.org/10.3390/chemengineering2040055
Received: 28 September 2018 / Revised: 2 November 2018 / Accepted: 6 November 2018 / Published: 14 November 2018
PDF Full-text (1331 KB)
Abstract
The gas/liquid phase separation of CO2 from a water-methanol solution at the anode side of a µDirect-Methanol-Fuel-Cell (µDMFC) plays a key role in the overall performance of fuel cells. This point is of particular importance if the µDMFC is based on a
[...] Read more.
The gas/liquid phase separation of CO2 from a water-methanol solution at the anode side of a µDirect-Methanol-Fuel-Cell (µDMFC) plays a key role in the overall performance of fuel cells. This point is of particular importance if the µDMFC is based on a “Lab-on-a-Chip” design with transient working behaviour, as well as with a recycling and a recovery system for unused fuel. By integrating a membrane-based micro contactor downstream into the µDMFC, the efficient removal of CO2 from a water-methanol solution is possible. In this work, a systematic study of the separation process regarding gas permeability with and without two-phase flow is presented. By considering the µDMFC working behaviour, an improvement of the overall separation performance is pursued. In general, the gas/liquid phase separation is achieved by (1) using a combination of the pressure gradient as a driving force, and (2) capillary forces in the pores of the membrane acting as a transport barrier depending on the nature of it (hydrophilic/hydrophobic). Additionally, the separation efficiency, pressure gradient, orientation, liquid loss, and active membrane area for different feed inlet temperatures and methanol concentrations are investigated to obtain an insight into the separation process at transient working conditions of the µDMFC. Full article
(This article belongs to the Special Issue Membrane and Membrane Reactors Operations in Chemical Engineering)
Open AccessArticle Dry Reforming of Methane in a Pd-Ag Membrane Reactor: Thermodynamic and Experimental Analysis
ChemEngineering 2018, 2(4), 48; https://doi.org/10.3390/chemengineering2040048
Received: 13 September 2018 / Revised: 2 October 2018 / Accepted: 9 October 2018 / Published: 10 October 2018
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Abstract
The present work is a study of CO2 Reforming of Methane (DRM) carried out in a catalytic Pd-based membrane reactor. A detailed thermodynamic analysis is carried out, calculating the chemical equilibrium parameters in two different cases: (a) DRM along with the Reverse
[...] Read more.
The present work is a study of CO2 Reforming of Methane (DRM) carried out in a catalytic Pd-based membrane reactor. A detailed thermodynamic analysis is carried out, calculating the chemical equilibrium parameters in two different cases: (a) DRM along with the Reverse Water Gas Shift (RWGS) reaction and (b) DRM along with both RWGS and the Boudouard Reaction (BR). The performance of membrane reactor is then experimentally analyzed in terms of methane conversion, hydrogen recovery and H2/CO reaction selectivity by varying feed pressure and CO2/CH4 feed molar ratio and 500 °C and GHSV = 100 h−1. Among the obtained results, a CH4 conversion of about 26% and a H2 recovery of 47% are achieved at low feed pressures, exceeding the traditional reactor equilibrium conversion. This effect can be attributed to the favorable thermodynamics coupled to the hydrogen permeation through the membrane. This study further demonstrates the general effectiveness of membrane-integrated reaction processes, which makes the production of syngas more efficient and performing, providing important environmental benefits. Full article
(This article belongs to the Special Issue Membrane and Membrane Reactors Operations in Chemical Engineering)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Experimental investigation of the gas/liquid phase separation using a membrane based micro contactor

Authors: Kay Marcel Dyrda*, Vincent Wilke, Katja Haas-Santo, Roland Dittmeyer

Affiliation: Institute for Micro Process Engineering, Karlsruhe Institute of Technology, Germany

Abstract: The gas / liquid phase separation of CO2 from a water-methanol solution at the anode side of a µDirect-Methanol-Fuel-Cell (µDMFC) plays a key role for the overall performance of the fuel cell. Especially if the µDMFC is based on a “Lab-on-a-Chip” design with transient working behaviour as well as recycling and recovery system for unused fuel. With a membrane based micro contactor installed downstream the µDMFC, the CO2 gas can be very efficiently removed from the water-methanol solution. By a systematic study of the separation process regarding gas permeability with and without two-phase flow, the overall separation performance with a view to the µDMFC working behaviour can be improved and is presented in this article/paper.

In general, the gas/liquid phase separation is achieved by combination of a pressure gradient as a driving force for separation of the gas or liquid phase and capillary forces in the pores of a porous membrane acting as a transport barrier against gas or liquid phase, depending on the nature of the membrane (hydrophilic / hydrophobic). Additionally the separation efficiency (separation factor, pressure gradient, orientation and liquid loss) for different feed inlet temperatures and methanol concentration were investigated to get a better understanding of the separation process at transient working conditions of the µDMFC. In further experiments, the active membrane area during the separation process was detected with respect to various gas volume flows at constant liquid volume flow. It is shown that the gas permeability with two-phase flow is significantly lower than with single-phase flow. In addition the working principle of the µDMFC is affecting the separation process of the membrane based micro contactor as an open or closed breather. Significant for the separable gas amount is the high dependence on the trans-membrane pressure difference setting the driving force. Moreover, the feed inlet temperature and methanol concentration as well as geometry parameters are affecting the pressure gradient and the overall separation performance.

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