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Separations
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Research on New Technology and Equipment of Multiphase Flow Separation
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Research on New Technology and Equipment of Multiphase Flow Separation

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Separation Engineering".

Deadline for manuscript submissions: 10 April 2025 | Viewed by 1536

Special Issue Editors

Dr. Chencan Du

E-Mail Website
Guest Editor
College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
Interests: microchemical technology; process intensification of reaction and separation
Dr. Yubin Wang

E-Mail Website
Guest Editor
Department of Chemical Engineering, Sichuan University, Chengdu, 610065, PR China
Interests: microchemical technology; process intensification of reaction and separation; wastewater treatment; multiphase flow

Special Issue Information

Dear Colleagues,

Multiphase flow separation plays a pivotal role in various industries, from oil and gas to chemical engineering and environmental science. As advancements in technology continue to reshape the landscape of multiphase flow dynamics, arises a pressing need arises to explore novel techniques and equipment for efficient separation processes.

This Special Issue aims to gather together cutting-edge research on the development and application of new technologies and equipment for multiphase flow separation. We invite contributions covering a wide range of topics, including, but not limited to, innovative separation methods, computational modeling, experimental investigations, and advancements in separation equipment design.

Researchers, engineers, and practitioners are encouraged to submit original research articles, reviews, and case studies to foster interdisciplinary discussions and promote knowledge exchange in this rapidly evolving field. Join us in shaping the future of multiphase flow separation by contributing to this Special Issue. Together, let us pave the way for more efficient, sustainable, and environmentally friendly separation processes. So please, submit your manuscripts and be part of this exciting endeavor!

Dr. Chencan Du
Dr. Yubin Wang
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

  • multiphase flow
  • separation technology
  • equipment design
  • process intensification
  • fluid dynamics
  • computational modeling
  • mass transfer
  • sustainable processes
  • environmental impact

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

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Research

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14 pages, 2897 KiB  
Article
Kinetic Study and Process Optimization of Plutonium Barrier Units for Enhanced Plutonium Stripping in the PUREX Process
by Haowei Zhu, Qi Chen, Chen Zuo, Tianchi Li, Jieqiong Yuan, Ziqian Zhao, Taihong Yan and Weifang Zheng
Separations 2024, 11(9), 278; https://doi.org/10.3390/separations11090278 - 23 Sep 2024
Viewed by 455
Abstract
In the PUREX (the plutonium uranium reduction extraction) process, a plutonium barrier unit (1BXX) is used to achieve deep plutonium stripping. According to the operating experience of the French reprocessing plant, after the separation of uranium and plutonium in the first cycle (1B [...] Read more.
In the PUREX (the plutonium uranium reduction extraction) process, a plutonium barrier unit (1BXX) is used to achieve deep plutonium stripping. According to the operating experience of the French reprocessing plant, after the separation of uranium and plutonium in the first cycle (1B + 1BXX), the plutonium barrier unit has excellent stripping effect, such that the removal of plutonium from uranium can already be achieved in the first cycle, and the second cycle only needs to focus on the removal of neptunium from uranium in order to obtain a qualified uranium product. In recent decades, China has also been actively conducting research on the plutonium barrier unit process to reduce the plutonium concentration in the primary uranium product in the first cycle to avoid the need to remove neptunium and plutonium at the same time in the second cycle, and to improve the efficiency and feasibility of reprocessing. Due to the lack of design basis for plutonium barriers to achieve deep plutonium stripping at present, this study conducts a basic study on the plutonium barrier unit, aiming to provide data for the optimization of plutonium barriers in the actual reprocessing process at a later date. In this work, a kinetic study on the reduction and stripping of trace plutonium from dibutyl phosphate-containing organic phases was carried out first, and the kinetic equations for the reduction and stripping of Pu(IV) by U(IV) under flow process conditions were obtained. The effects of U(IV) addition on the extraction loss of U(IV) and the concentration distribution of U(IV) at various stages were investigated by process simulation. Additionally, the oxidation of U(IV) under process conditions was investigated to clarify the process chemistry of U(IV) oxidation and to provide a reference for the oxidation consumption of U(IV). Finally, the process parameters of the plutonium barrier unit were preliminarily designed based on the above research. Full article
(This article belongs to the Special Issue Research on New Technology and Equipment of Multiphase Flow Separation)
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Review

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21 pages, 6854 KiB  
Review
Process Intensification of Gas–Liquid Separations Using Packed Beds: A Review
by Yafang Zhang, Chencan Du, Zhibo Zhang, Jiawei Du, Yuming Tu and Zhongqi Ren
Separations 2024, 11(10), 284; https://doi.org/10.3390/separations11100284 - 2 Oct 2024
Viewed by 752
Abstract
The gas–liquid multiphase process plays a crucial role in the chemical industry, and the utilization of packed beds enhances separation efficiency by increasing the contact area and promoting effective gas–liquid interaction during the separation process. This paper primarily reviews the progress from fundamental [...] Read more.
The gas–liquid multiphase process plays a crucial role in the chemical industry, and the utilization of packed beds enhances separation efficiency by increasing the contact area and promoting effective gas–liquid interaction during the separation process. This paper primarily reviews the progress from fundamental research to practical application of gas–liquid multiphase processes in packed bed reactors, focusing on advancements in fluid mechanics (flow patterns, liquid holdup, and pressure drop) and the mechanisms governing gas–liquid interactions within these reactors. Firstly, we present an overview of recent developments in understanding gas–liquid flow patterns; subsequently we summarize liquid holdup and pressure drop characteristics within packed beds. Furthermore, we analyze the underlying mechanisms involved in bubble breakup and coalescence phenomena occurring during continuous flow of gas–liquid dispersions, providing insights for reactor design and operation strategies. Finally, we summarize applications of packed bed reactors in carbon dioxide absorption, chemical reactions, and wastewater treatment while offering future perspectives. These findings serve as valuable references for optimizing gas–liquid separation processes. Full article
(This article belongs to the Special Issue Research on New Technology and Equipment of Multiphase Flow Separation)
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