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Mass and heat transfer at spiral tube internal used as a heat exchanger and catalyst support in a continuous bubble column reactor.

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Title: Mass and heat transfer at spiral tube internal used as a heat exchanger and catalyst support in a continuous bubble column reactor.
Authors: El-Naggar, Mohamed A.1,2 (AUTHOR), Abdel-Gawad, Esraa H.3 (AUTHOR), Saleh, Ibrahim H.3 (AUTHOR), Sedahmed, Gomaa H.1 (AUTHOR), Attar, Alaa4 (AUTHOR), Abdel-Aziz, Mohamed Helmy1,5 (AUTHOR) mhmousa@alexu.edu.eg, El-Ashtoukhy, El-Sayed Z.1 (AUTHOR), Almutlaq, Nasser6 (AUTHOR), Fathalla, Ahmed S.1 (AUTHOR)
Source: Experimental Heat Transfer. 2026, Vol. 39 Issue 1, p43-70. 28p.
Subjects: Mass transfer, Bubble column reactors, Heat transfer, Heat exchangers, Catalyst supports
Abstract: Slurry bubble columns find extensive applications in three-phase reactions, including biological wastewater treatment, fermentation, and hydrotreating, among others. Despite their merits, these reactors suffer from drawbacks such as high back mixing and challenges in product-catalyst separation. This study introduces a novel approach to address these issues by employing a horizontally placed spiral tube within the column, serving as both a catalyst support and a heat exchanger. The study investigates the impact of two-phase flow on mass transfer at the outer surface of the spiral tube using the limiting current based electrochemical technique. The experimental setup involves varying spiral tube diameter and pitch, as well as distances between successive spiral tubes. The results showed that the mass transfer coefficient increases with increasing superficial gas and solution velocities but decreases with increasing spiral tube diameter and pitch. An array of three separated horizontal spiral tubes was also tested, and the mass transfer coefficient was found to be slightly lower than that of a single spiral tube by an amount ranged from 4 to 19%. The study provides valuable insights into optimizing reactor design for improved efficiency, offering a potential solution to challenges in slurry bubble column reactors. [ABSTRACT FROM AUTHOR]
Copyright of Experimental Heat Transfer is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 189081991
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Mass and heat transfer at spiral tube internal used as a heat exchanger and catalyst support in a continuous bubble column reactor.
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  Data: <searchLink fieldCode="AR" term="%22El-Naggar%2C+Mohamed+A%2E%22">El-Naggar, Mohamed A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abdel-Gawad%2C+Esraa+H%2E%22">Abdel-Gawad, Esraa H.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Saleh%2C+Ibrahim+H%2E%22">Saleh, Ibrahim H.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sedahmed%2C+Gomaa+H%2E%22">Sedahmed, Gomaa H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Attar%2C+Alaa%22">Attar, Alaa</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abdel-Aziz%2C+Mohamed+Helmy%22">Abdel-Aziz, Mohamed Helmy</searchLink><relatesTo>1,5</relatesTo> (AUTHOR)<i> mhmousa@alexu.edu.eg</i><br /><searchLink fieldCode="AR" term="%22El-Ashtoukhy%2C+El-Sayed+Z%2E%22">El-Ashtoukhy, El-Sayed Z.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Almutlaq%2C+Nasser%22">Almutlaq, Nasser</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fathalla%2C+Ahmed+S%2E%22">Fathalla, Ahmed S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Experimental+Heat+Transfer%22">Experimental Heat Transfer</searchLink>. 2026, Vol. 39 Issue 1, p43-70. 28p.
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  Data: <searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Bubble+column+reactors%22">Bubble column reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+exchangers%22">Heat exchangers</searchLink><br /><searchLink fieldCode="DE" term="%22Catalyst+supports%22">Catalyst supports</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Slurry bubble columns find extensive applications in three-phase reactions, including biological wastewater treatment, fermentation, and hydrotreating, among others. Despite their merits, these reactors suffer from drawbacks such as high back mixing and challenges in product-catalyst separation. This study introduces a novel approach to address these issues by employing a horizontally placed spiral tube within the column, serving as both a catalyst support and a heat exchanger. The study investigates the impact of two-phase flow on mass transfer at the outer surface of the spiral tube using the limiting current based electrochemical technique. The experimental setup involves varying spiral tube diameter and pitch, as well as distances between successive spiral tubes. The results showed that the mass transfer coefficient increases with increasing superficial gas and solution velocities but decreases with increasing spiral tube diameter and pitch. An array of three separated horizontal spiral tubes was also tested, and the mass transfer coefficient was found to be slightly lower than that of a single spiral tube by an amount ranged from 4 to 19%. The study provides valuable insights into optimizing reactor design for improved efficiency, offering a potential solution to challenges in slurry bubble column reactors. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Experimental Heat Transfer is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/08916152.2024.2447796
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 28
        StartPage: 43
    Subjects:
      – SubjectFull: Mass transfer
        Type: general
      – SubjectFull: Bubble column reactors
        Type: general
      – SubjectFull: Heat transfer
        Type: general
      – SubjectFull: Heat exchangers
        Type: general
      – SubjectFull: Catalyst supports
        Type: general
    Titles:
      – TitleFull: Mass and heat transfer at spiral tube internal used as a heat exchanger and catalyst support in a continuous bubble column reactor.
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            – D: 01
              M: 01
              Text: 2026
              Type: published
              Y: 2026
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