An automated colorimetric inline titration of CO2 concentrations in solvent flow streams using a Teflon AF-2400 tube-in-tube device

O’Brien, Matthew

doi:10.1016/j.jcou.2017.08.020

Cited by 18 publications

(14 citation statements)

References 55 publications

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“…[28] The rise of importance of precompetitive research has led to extensive development of open source technologies, which facilitates simple propagation of new ideas between research teams. Recent reports have harnessed open-source ideas to aid with multiphasic reaction execution, [29] downstream processing of crude reaction mixtures [30] and combining multiple unit operations together for more advanced applications of reaction automation. [31] We believe that inexpensive computer control devices, such as the Raspberry Pi and Arduino systems, [32] will fuel adoption of these new enabling techniques, further enhancing the open-source community by direct feedback from different sectors.…”

Section: Photochemistrymentioning

confidence: 99%

A New World for Chemical Synthesis?

Ley¹,

Chen²,

Fitzpatrick³

et al. 2019

Chimia

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This perspective seeks to provide an overarching vision of the current state of chemical synthesis methodology using machinery as enabling tools. It highlights current capabilities and limitations in this highly digitallyconnected world and suggests areas where new opportunities may arise in the future by going well beyond our present levels of innovation and automation. There is a new need for improved downstream processing tools, advanced reactor design, computational predictive algorithms and integration of robotic systems to maximise the human resource to facilitate a new era in the assembly of our functional materials.

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Section: Photochemistrymentioning

confidence: 99%

A New World for Chemical Synthesis?

Ley¹,

Chen²,

Fitzpatrick³

et al. 2019

Chimia

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show abstract

“…With the tube‐in‐tube reactor, they also established an inline titration technique to measure the CO 2 and NH 3 concentration in flowing liquids . 30‐33 Wu and co‐workers have developed a novel method with a bubble meter for measuring gas solubility in organic solvents using a tube‐in‐tube membrane contactor 34 . More recently, by using a gas mass flowmeter to record the change of gas flow rate across the membrane with time, we have built a flow platform for studying gas–liquid systems with the tube‐in‐tube reactor, which have realized the rapid measurement of gas solubility, 22 gas diffusion coefficient in liquids 2 and reaction rate constant of fast gas–liquid reactions 24 .…”

Section: Introductionmentioning

confidence: 99%

Rapid measurement of gas diffusivity in liquids using a tube‐in‐tube reactor with an unsteady‐state strategy

Zhou

Xie

et al. 2020

AIChE Journal

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In this work, an unsteady-state strategy for rapid measurement of gas diffusivity in liquid is proposed, which has a quick perturbation of the liquid flow rate in inner tube for obtaining the change of gas flow rate across the membrane with time. The strategy has taken full advantages of the tube-in-tube reactor that possesses a high permeability Teflon AF-2400 membrane to accelerate the diffusion rate of gas to liquid without direct contact between the two phases. With a developed mathematical model fitting the recorded variation of gas flow rate with time, the gas diffusivity in liquid can be determined within 0.5-3 min compared with the conventional methods of 4-14 hr. In addition, the strategy is demonstrated with several gas-liquid systems (O 2-DMSO, CO 2-[Emim] [NTf 2 ] and CO 2-[Bmim] [BF 4 ]) with varied viscosities and temperatures, showing a good agreement with literature values with less than 10% deviation.

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“…Recently, a membrane reactor based on a tube-in-tube configuration has been developed as an ideal tool for the research of gas–liquid dissolution processes and reactions. − The tube-in-tube reactor consists of a Teflon AF-2400 inner semipermeable membrane tubing and a nonpermeable outer tubing (polytetrafluoroethylene (PTFE)) and the inner tubing has selectively high permeability to gases but not liquids, acting as a contact interface for rapidly saturating liquid streams with gases. Because of this property, the tube-in-tube reactor is a robust tool for rapidly measuring gas solubility in liquids.…”

Section: Introductionmentioning

confidence: 99%

Rapid Measurement of Gas Solubility in Ionic Liquids with a Simple Tube-in-Tube Reactor

Lan

Zhao

Zeng

et al. 2019

Ind. Eng. Chem. Res.

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Here, we present a strategy for rapid measurement of gas solubility in ionic liquids based on a simple configuration of tube-in-tube reactor. Ionic liquids can be rapidly saturated without direct contact of gas and liquid via a semipermeable Teflon AF-2400 inner tubing in the reactor, and the gas solubility can be easily determined by a steady-state flux balance of both gas and liquid flowing into the reactor. Solubility data of gaseous carbon dioxide (CO2), ethylene (C2H4), and ethane (C2H6) in several ionic liquids ([Emim][NTf2], [Omim][NTf2], [Bmim][BF4], [Bmim][PF6], and [Omim][NTf2]) were successfully determined at temperatures between 30 °C and 60 °C and low pressure (no higher than 8 bar), showing less than 8% deviation, compared with the literature values. A single gas solubility data point can be obtained within 10 min, showing high efficiency compared with conventional methods (5–48 h). Finally, the application scope and limitations of this method were discussed.

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An automated colorimetric inline titration of CO2 concentrations in solvent flow streams using a Teflon AF-2400 tube-in-tube device

Cited by 18 publications

References 55 publications

A New World for Chemical Synthesis?

A New World for Chemical Synthesis?

Rapid measurement of gas diffusivity in liquids using a tube‐in‐tube reactor with an unsteady‐state strategy

Rapid Measurement of Gas Solubility in Ionic Liquids with a Simple Tube-in-Tube Reactor

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