Microbubble Beam (MBB), A potential Dispersion Mechanism for Multiphase Gas-Liquid Microreactor Systems

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Systems consisting of single and multiple micropipet tips mounted in a channel for the generation of microbubble beams (MBB, as a gas−liquid dispersion mechanism) in moving liquids were constructed in stainless steel housing with Pyrex windows on both sides of the housing for imaging. Pressure head effects were used to pump the liquid through the channel, while air obtained directly from a pressurized source was introduced through the micropipets into the channel perpendicular to the (main) liquid flow direction. The effects of the liquid velocity, gas-supply pressure, pipet hole size, liquid temperature, liquid viscosity, pipet−liquid hydrophilicity, and multiple-pipet configurations on the bubble generation and the bubble size, quantity, and speed have been investigated. Reverse hydrophilicity is required of the pipet and the liquid so as to reduce gas-supply pressure requirements. Specific interfacial contact areas estimated were about 2−10 times larger than those reported until now in the literature for the microbubble columns employed in microreactor systems, and even far larger than those reported for conventional/traditional gas−liquid contacting equipment, suggesting a superior performance for the MBB dispersion technique in future microreactor applications. Multiple micropipet configuration, rather than one large pipet hole, is the recommended means of increasing the gas quantity requirements, with enough inter-pipet distances and pipet height differences so as to prevent bubble coalescence.
Original languageUndefined
Pages (from-to)3721-3730
Number of pages10
JournalIndustrial and engineering chemistry research
Volume42
Issue number16
DOIs
Publication statusPublished - 2003

Keywords

  • METIS-213469
  • IR-45879

Cite this

@article{8c520a61bb944006abe5e4b3fa6333fd,
title = "Microbubble Beam (MBB), A potential Dispersion Mechanism for Multiphase Gas-Liquid Microreactor Systems",
abstract = "Systems consisting of single and multiple micropipet tips mounted in a channel for the generation of microbubble beams (MBB, as a gas−liquid dispersion mechanism) in moving liquids were constructed in stainless steel housing with Pyrex windows on both sides of the housing for imaging. Pressure head effects were used to pump the liquid through the channel, while air obtained directly from a pressurized source was introduced through the micropipets into the channel perpendicular to the (main) liquid flow direction. The effects of the liquid velocity, gas-supply pressure, pipet hole size, liquid temperature, liquid viscosity, pipet−liquid hydrophilicity, and multiple-pipet configurations on the bubble generation and the bubble size, quantity, and speed have been investigated. Reverse hydrophilicity is required of the pipet and the liquid so as to reduce gas-supply pressure requirements. Specific interfacial contact areas estimated were about 2−10 times larger than those reported until now in the literature for the microbubble columns employed in microreactor systems, and even far larger than those reported for conventional/traditional gas−liquid contacting equipment, suggesting a superior performance for the MBB dispersion technique in future microreactor applications. Multiple micropipet configuration, rather than one large pipet hole, is the recommended means of increasing the gas quantity requirements, with enough inter-pipet distances and pipet height differences so as to prevent bubble coalescence.",
keywords = "METIS-213469, IR-45879",
author = "G.N. Doku and Willem Verboom and David Reinhoudt and {van den Berg}, Albert",
year = "2003",
doi = "10.1021/ie020915h",
language = "Undefined",
volume = "42",
pages = "3721--3730",
journal = "Industrial and engineering chemistry research",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "16",

}

Microbubble Beam (MBB), A potential Dispersion Mechanism for Multiphase Gas-Liquid Microreactor Systems. / Doku, G.N.; Verboom, Willem; Reinhoudt, David; van den Berg, Albert.

In: Industrial and engineering chemistry research, Vol. 42, No. 16, 2003, p. 3721-3730.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Microbubble Beam (MBB), A potential Dispersion Mechanism for Multiphase Gas-Liquid Microreactor Systems

AU - Doku, G.N.

AU - Verboom, Willem

AU - Reinhoudt, David

AU - van den Berg, Albert

PY - 2003

Y1 - 2003

N2 - Systems consisting of single and multiple micropipet tips mounted in a channel for the generation of microbubble beams (MBB, as a gas−liquid dispersion mechanism) in moving liquids were constructed in stainless steel housing with Pyrex windows on both sides of the housing for imaging. Pressure head effects were used to pump the liquid through the channel, while air obtained directly from a pressurized source was introduced through the micropipets into the channel perpendicular to the (main) liquid flow direction. The effects of the liquid velocity, gas-supply pressure, pipet hole size, liquid temperature, liquid viscosity, pipet−liquid hydrophilicity, and multiple-pipet configurations on the bubble generation and the bubble size, quantity, and speed have been investigated. Reverse hydrophilicity is required of the pipet and the liquid so as to reduce gas-supply pressure requirements. Specific interfacial contact areas estimated were about 2−10 times larger than those reported until now in the literature for the microbubble columns employed in microreactor systems, and even far larger than those reported for conventional/traditional gas−liquid contacting equipment, suggesting a superior performance for the MBB dispersion technique in future microreactor applications. Multiple micropipet configuration, rather than one large pipet hole, is the recommended means of increasing the gas quantity requirements, with enough inter-pipet distances and pipet height differences so as to prevent bubble coalescence.

AB - Systems consisting of single and multiple micropipet tips mounted in a channel for the generation of microbubble beams (MBB, as a gas−liquid dispersion mechanism) in moving liquids were constructed in stainless steel housing with Pyrex windows on both sides of the housing for imaging. Pressure head effects were used to pump the liquid through the channel, while air obtained directly from a pressurized source was introduced through the micropipets into the channel perpendicular to the (main) liquid flow direction. The effects of the liquid velocity, gas-supply pressure, pipet hole size, liquid temperature, liquid viscosity, pipet−liquid hydrophilicity, and multiple-pipet configurations on the bubble generation and the bubble size, quantity, and speed have been investigated. Reverse hydrophilicity is required of the pipet and the liquid so as to reduce gas-supply pressure requirements. Specific interfacial contact areas estimated were about 2−10 times larger than those reported until now in the literature for the microbubble columns employed in microreactor systems, and even far larger than those reported for conventional/traditional gas−liquid contacting equipment, suggesting a superior performance for the MBB dispersion technique in future microreactor applications. Multiple micropipet configuration, rather than one large pipet hole, is the recommended means of increasing the gas quantity requirements, with enough inter-pipet distances and pipet height differences so as to prevent bubble coalescence.

KW - METIS-213469

KW - IR-45879

U2 - 10.1021/ie020915h

DO - 10.1021/ie020915h

M3 - Article

VL - 42

SP - 3721

EP - 3730

JO - Industrial and engineering chemistry research

JF - Industrial and engineering chemistry research

SN - 0888-5885

IS - 16

ER -