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

Abstract

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.

Continuous Counter-Current Multistage Microextraction in a Novel Tube-In-Tube Microextractor

“…Recently, a tube-in-tube configuration was proved to be an efficient combination of membrane reactor and microreactor. − This configuration employs a semipermeable Teflon AF-2400 tube as a contact interface for gas and liquid and is mainly applied in gas–liquid systems. However, to the best of our knowledge, this tube-in-tube configuration was rarely employed in continuous membrane microextraction due to the limitation of membrane materials.…”

Antibacterial activity, synthesis and characterization of a new Ag(I) and Pd(II) complexes with N-heterocyclic carbene

“…This paper will focus on the synthesis and use of silver(I) and gold(I) NHC derivatives in medicinal applications. 10,11,12 Most of the time, the N-heterocyclic carbenes are attached to the metal by giving it a carbene lone pair, which has little acceptor property. The specific metal and carbene under consideration determine the extent of the metal'sback donation.…”

Leveraging 3D Printing for the Design of High-Performance Venturi Microbubble Generators

“…Microreaction technology as a novel approach to process intensification enables highly efficient and sustainable chemical synthesis because of numerous benefits along with the miniaturization of reactor dimensions to microscale, that is, enhanced heat/mass transfer, precise process control, fast response to step change in pressure and/or temperature, and safer operation. − In particular, gas–liquid microchemical systems are commonly employed in various industrial processes, including halogenation, hydrogenation, and oxidation reactions. , Because of the presence of multiple phases, there are considerable difficulties in maintaining good mixing compared with single phase systems, and a superior multiphase reactor depends on a precise control of high specific interfacial area to achieve desirable mass transfer and reaction performance. , Numerous research efforts have been made in order to enhance gas–liquid mass transfer, − in which reducing the average gas bubble size holds great promise, especially generating microbubbles with minimal power consumption. Gas–liquid chemical processes would benefit from the advantageous properties of microbubbles, such as large specific surface area, high gas dissolution rate, fast surface adsorption, and long residence time. , …”