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Separations
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Adsorption Based Reactive-Separation Processes
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Adsorption Based Reactive-Separation Processes

A special issue of Separations (ISSN 2297-8739).

Deadline for manuscript submissions: closed (30 December 2021) | Viewed by 9301

Special Issue Editors

Prof. Dr. Alírio E. Rodrigues

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Guest Editor
Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
Interests: chemical engineering; bioengineering; materials engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Rui P. V. Faria

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Guest Editor
Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto, 4200-465 Porto – Portugal
Interests: chemical reaction engineering; chromatographic separation processes; adsorption-based reactive separation processes; simulated moving bed technology; process modeling and simulation
Dr. Jonathan C. Gonçalves

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Guest Editor
Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto, 4200-465 Porto, Portugal
Interests: chemical reaction engineering; adsorbent and catalyst development; adsorption/reaction processes; simulation moving bed technology; process modeling and simulation

Special Issue Information

Dear Colleagues,

The concept of process intensification represents one of the major paradigm changes in chemical reaction engineering over the last few decades, leading to the development of new and efficient hybrid technologies that were able to overcome the performance of conventional processes, substantially reducing production costs and environmental impact.

In this context, adsorption-based reactive processes emerged as a key technology within this research field and have been extensively applied for the synthesis and purification of relevant compounds within the petrochemicals, food, fine chemicals, and pharmaceuticals industries, among others. Through the synergetic effects arising from the combination of chemical reaction with products separation by adsorption in a single device, more efficient use of raw materials and energy can be achieved.

These processes can be implemented in single-column fixed bed reactors or in complex multi-column units with cyclic operation modes, as the simulated moving bed reactor, both for liquid and gas phase systems. Despite the challenges of simultaneously meeting the technical and operational requirements for achieving optimal reaction and separation conditions, the advantages brought by the combination of these techniques largely overcome its drawbacks. Moreover, the deep knowledge of the phenomena undergoing in these processes, together with the latest advances in materials sciences and mathematical modeling, have supported the success of these technologies.

For these reasons, this Special Issue aims to provide a comprehensive overview of the advantages of adsorption-based reactive separation processes over conventional techniques, demonstrating its outstanding performance and wide range of applications.

Prof. Dr. Alírio E. Rodrigues
Dr. Rui P. V. Faria
Dr. Jonathan C. Gonçalves
Guest Editors

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 submissions that pass pre-check are 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. Separations is an international peer-reviewed open access monthly 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 2600 CHF (Swiss Francs). 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

  • Adsorption
  • Process intensification
  • Multifunctional reactors
  • Hybrid materials
  • Sorption-enhanced reactors
  • Multilayer bed systems
  • Simulated moving bed reactor
  • Process integration

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Published Papers (3 papers)

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Research

18 pages, 6459 KiB  
Article
A Complete Heterogeneous Model for the Production of n-Propyl Propionate Using a Simulated Moving Bed Reactor
by Rodrigo Santos, Carine Rebello, Anderson Prudente, Ana M. Ribeiro, Alírio E. Rodrigues, José M. Loureiro, Karen V. Pontes and Idelfonso B. R. Nogueira
Separations 2022, 9(2), 43; https://doi.org/10.3390/separations9020043 - 4 Feb 2022
Cited by 3 | Viewed by 2912
Abstract
n-Propyl Propionate (ProPro) is a harmless biodegradable product employed in several fields for the production of drugs, inks, coating, food, and perfume. ProPro is synthesized in an equilibrium reaction for which its yield can be enhanced by constant withdraw of the products as [...] Read more.
n-Propyl Propionate (ProPro) is a harmless biodegradable product employed in several fields for the production of drugs, inks, coating, food, and perfume. ProPro is synthesized in an equilibrium reaction for which its yield can be enhanced by constant withdraw of the products as the reaction takes place. Simulated Moving Bed Reactor (SMBR) is a candidate for the production of ProPro with high efficiency as it is a multifunction unit able to simultaneously run reaction and separation, hence shifting the equilibrium reaction toward products. This paper proposes a complete phenomenological model for the ProPro synthesis in a Simulated Moving Bed Reactor (SMBR) packed with the heterogeneous catalyst Amberlyst 46 resin. The operating conditions are defined by the Triangle Theory to design an SMBR unit to produce ProPro efficiently and a comprehensive parameter estimation procedure is employed to obtain more representative parameters. The validated phenomenological model was applied to design an SMBR unit to produce high purity (99.28%) ProPro. Full article
(This article belongs to the Special Issue Adsorption Based Reactive-Separation Processes)
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21 pages, 34624 KiB  
Article
Steam and Pressure Management for the Conversion of Steelworks Arising Gases to H2 with CO2 Capture by Stepwise Technology
by Francesco Sebastiani, Leonie Lucking, Marija Sarić, Jebin James, Jurriaan Boon, H. J. A. Eric van Dijk, Paul Cobden and Johannis A. Z. Pieterse
Separations 2022, 9(1), 20; https://doi.org/10.3390/separations9010020 - 17 Jan 2022
Cited by 4 | Viewed by 3060
Abstract
Steel production is a main source of CO2 emissions globally. These emissions must be drastically reduced to meet climate change mitigation goals. STEPWISE is a Sorption Enhanced Reactive Process (SERP) technology that converts steel works arising gases to H2 with simultaneous [...] Read more.
Steel production is a main source of CO2 emissions globally. These emissions must be drastically reduced to meet climate change mitigation goals. STEPWISE is a Sorption Enhanced Reactive Process (SERP) technology that converts steel works arising gases to H2 with simultaneous CO2 capture. The main energy requirements of the process are the high- and low-pressure steam quantities that are needed to rinse and regenerate the adsorbent. In this simulation study, the separation performance of STEPWISE is evaluated over a range of steam and feed pressure inputs by searching those design points where CO2 recovery and purity percentages are equalized. This method is used to facilitate the comparison of different operating regimes. Results highlight the importance of the rinse to purge ratio (R/P) as a design variable. A higher R/P ratio is demonstrated to maintain CO2 recovery and purity of ~95.5%, while total steam consumption and feed carbon loading are reduced by 27% and 20%, respectively. This is achieved without changing other parameters, like cycle time. Additionally, it is demonstrated that the CO2 capture performance can be maintained for varying feed pressure values by tuning the feed carbon loading. Future studies are recommended to focus on the expected role of the feed gas steam content on these findings. Full article
(This article belongs to the Special Issue Adsorption Based Reactive-Separation Processes)
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16 pages, 1347 KiB  
Article
Multi-Objective Optimisation of Biodiesel Synthesis in Simulated Moving Bed Reactor
by Nillohit Mitra Ray and Ajay K. Ray
Separations 2021, 8(8), 127; https://doi.org/10.3390/separations8080127 - 21 Aug 2021
Cited by 1 | Viewed by 2033
Abstract
In this work, multi-objective optimisation study was performed to determine the performance improvement in a simulated moving bed reactor (SMBR) for biodiesel synthesis. The selection of the operating parameters such as switching time, liquid flow rates in various sections, as well as the [...] Read more.
In this work, multi-objective optimisation study was performed to determine the performance improvement in a simulated moving bed reactor (SMBR) for biodiesel synthesis. The selection of the operating parameters such as switching time, liquid flow rates in various sections, as well as the length and number of columns is not straightforward in an SMBR. In most cases, conflicting requirements and constraints influence the optimal selection of the decision (operating or design) variables. A mathematical model that predicts single-column experimental results well was modified and verified experimentally for multiple-column SMBR system. In this article, a few multi-objective optimisation problems were carried out for both existing set-up as well as at the design stage. A non-dominated sorting genetic algorithm (NSGA) was used as the optimisation tool for the optimisation study. Due to conflicting effect of process parameters, the multi-objective optimisation study resulted in non-dominated Pareto optimal solutions. It was shown that significant increase in yield and purity of biodiesel in SMBR was possible both for operating and at design stage. Full article
(This article belongs to the Special Issue Adsorption Based Reactive-Separation Processes)
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