Continuous Neutralization of NaOH Solution with CO2 in an Internal-Loop Airlift Reactor

Thomas Michael Pichler; Bernd Stoppacher; Alexander Kaufmann; Matthäus Siebenhofer; Marlene Kienberger

doi:10.1002/ceat.202000319

Continuous Neutralization of NaOH Solution with CO2 in an Internal-Loop Airlift Reactor

Thomas Michael Pichler^*, Bernd Stoppacher, Alexander Kaufmann, Matthäus Siebenhofer, Marlene Kienberger

^*Corresponding author for this work

Institute of Chemical Engineering and Environmental Technology (6670)

Research output: Contribution to journal › Article › peer-review

Abstract

The neutralization of NaOH with CO2 in a continuously operated airlift reactor with gas flow rates up to 10 NL min−1 and gas phase recycle was investigated. Neutralization experiments were performed at 25 °C and the amount of absorbed CO2, as well as the NaOH feed rate, were recorded. The reaction rate was calculated based on the two‐film theory and empirical equations for several parameters. The calculations of the volumetric mass transfer coefficient, the liquid phase circulation velocity, and the gas holdup were experimentally validated. The reaction rate and the process efficiency were modeled with a deviation of 5 %.

Original language	English
Pages (from-to)	38-47
Number of pages	10
Journal	Chemical Engineering & Technology
Volume	44
Issue number	1
DOIs	https://doi.org/10.1002/ceat.202000319
Publication status	Published - Jan 2021

Keywords

Airlift reactor
Mass transfer
NaOH neutralization
Reaction rate
Reactive absorption

ASJC Scopus subject areas

Chemical Engineering(all)
Chemistry(all)
Industrial and Manufacturing Engineering

Fields of Expertise

Sustainable Systems

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10.1002/ceat.202000319Licence: CC BY-NC-ND 4.0

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title = "Continuous Neutralization of NaOH Solution with CO2 in an Internal-Loop Airlift Reactor",

abstract = "The neutralization of NaOH with CO2 in a continuously operated airlift reactor with gas flow rates up to 10 NL min−1 and gas phase recycle was investigated. Neutralization experiments were performed at 25 °C and the amount of absorbed CO2, as well as the NaOH feed rate, were recorded. The reaction rate was calculated based on the two‐film theory and empirical equations for several parameters. The calculations of the volumetric mass transfer coefficient, the liquid phase circulation velocity, and the gas holdup were experimentally validated. The reaction rate and the process efficiency were modeled with a deviation of 5 %.",

keywords = "Airlift reactor, Mass transfer, NaOH neutralization, Reaction rate, Reactive absorption",

author = "Pichler, {Thomas Michael} and Bernd Stoppacher and Alexander Kaufmann and Matth{\"a}us Siebenhofer and Marlene Kienberger",

year = "2021",

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AU - Pichler, Thomas Michael

AU - Stoppacher, Bernd

AU - Kaufmann, Alexander

AU - Siebenhofer, Matthäus

AU - Kienberger, Marlene

PY - 2021/1

Y1 - 2021/1

N2 - The neutralization of NaOH with CO2 in a continuously operated airlift reactor with gas flow rates up to 10 NL min−1 and gas phase recycle was investigated. Neutralization experiments were performed at 25 °C and the amount of absorbed CO2, as well as the NaOH feed rate, were recorded. The reaction rate was calculated based on the two‐film theory and empirical equations for several parameters. The calculations of the volumetric mass transfer coefficient, the liquid phase circulation velocity, and the gas holdup were experimentally validated. The reaction rate and the process efficiency were modeled with a deviation of 5 %.

AB - The neutralization of NaOH with CO2 in a continuously operated airlift reactor with gas flow rates up to 10 NL min−1 and gas phase recycle was investigated. Neutralization experiments were performed at 25 °C and the amount of absorbed CO2, as well as the NaOH feed rate, were recorded. The reaction rate was calculated based on the two‐film theory and empirical equations for several parameters. The calculations of the volumetric mass transfer coefficient, the liquid phase circulation velocity, and the gas holdup were experimentally validated. The reaction rate and the process efficiency were modeled with a deviation of 5 %.

KW - Airlift reactor

KW - Mass transfer

KW - NaOH neutralization

KW - Reaction rate

KW - Reactive absorption

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JO - Chemical Engineering & Technology

JF - Chemical Engineering & Technology

IS - 1

ER -

Continuous Neutralization of NaOH Solution with CO2 in an Internal-Loop Airlift Reactor

Abstract

Keywords

ASJC Scopus subject areas

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