The solubility of carbon dioxide in a series imidazolium-based room-temperature ionic liquids has been determined using quartz crystal microbalance. Henry's constants were obtained for CO2 nine different liquids: 1-methyl-3-propylimidazolium bis[trifluoromethylsulfonyl]amide (C3mimTf2N), 1-n-butyl-3-methylimidazolium (C4mimTf2N), C4mimTf2N with polyethylenimine, 1-n-hexyl-3-methylimidazolium (C6mimTf2N), 1-methyl-3-n-octylimidazolium (C8mimTf2N),...

:Ionic liquids have received increasing interest in recent years for "green" synthesis and separations because they essentially no vapor pressure. We begun an investigation of the potential ionic gas separations, including removal carbon dioxide from stack generated coal-fired power plants. In this paper, we report results measurements permeance nitrogen supported liquid membranes. Preliminary a porous alumina membrane saturated with l-butyl-3-methyl imidazolium bis[trinuoromethylsulfonyl]...

In this paper, results from an experimental investigation of carbon dioxide (CO2) solubility and diffusivity in the ionic liquids 1-n-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][Tf2N]), 1,2-dimethyl-3-propylimidazolium ([pmmim][Tf2N]), 1-butyl-3-methylpyridinium bis(trifluoromethyl sulfonyl)imide ([bmpy][Tf2N]), 1-(3,4,5,6-perfluorohexyl)-3-methylimdazolium ([perfluoro-hmim][Tf2N]), tetrafluoroborate ([bmim][BF4]) are reported. A transient thin liquid film method was...

A transient thin liquid film gas uptake technique was used to measure the diffusion coefficients of carbon dioxide under infinite dilution conditions in eight commercially available room-temperature ionic liquids at 10, 25, and 40 °C. The measured CO2 were ∼1 × 10−6 cm2/s, an order magnitude smaller than for traditional organic solvents. Combining these results with diffusivity values reported literature nonionic fluids shows a generally universal relationship between solvent viscosity,...

The low pressure solubility of carbon dioxide in eight commercially available room temperature ionic liquids was measured at 10, 25, and 40 °C using a transient thin liquid film technique. In this paper, is reported as the Henry's law constant for each system. Experimental results were interpreted regular solution theory where Eyring's reaction rate successfully applied to estimate parameter from its activation energy viscosity. Consistent with theory, found be inversely proportional liquid,...

Work in our laboratory has focused for a number of years on examining the potential room-temperature ionic liquids post-combustion carbon capture processes. Results from studies dioxide solubility, diffusivity, and permeation across supported liquid membranes have raised questions about impact solid interface properties liquids. In this paper, we report results measurements uptake into confined within ceramic nanoporous film compare solubility diffusivity to values measured with bulk phase...

The electrochemical interfaces of a glassy carbon (GC) electrode and nanotube (CNT) paper have been studied in 1-ethyl-3-methylimidazolium tetrafluoroborate (EmimBF4) 1-butyl-3-methylimidazolium (BmimBF4) ionic liquids (ILs) using direct current (DC) cyclic voltammetry (CV) alternating (AC) impedance spectroscopy (EIS). These four electrode/electrolyte combinations serve as representative models the relatively unconventional, spatially inhomogeneous IL−carbon that are potentially useful for...

Abstract The effective diffusion coefficients of dextran and polyethylene glycol in track‐etched polycarbonate membranes were measured using with nominal pore sizes 0.03 μm, 0.05 0.1 μm. Experiments performed narrow‐size range fractions each polymer. When the Stokes‐Einstein radius was used to describe solute size, observed diffusivities for both polymers agreed closely larger than values predicted rigid spheres, as well linear when only steric interactions wall are assumed. These...

Results from an investigation of the frequency response resulting ligand binding for a genetically engineered hormone-binding domain α-estrogen receptor immobilized to piezoelectric quartz crystal are reported. Two different approaches were used attach altered gold electrode on surface: (1) mutant containing single solvent-exposed cysteine was directly attached via sulfur covalent bond, forming self-assembled protein monolayer, and (2) N-terminal histidine-tagged end utilized...

We have examined the potential utility of a glucose biosensor that employs glucose/galactose receptor Escherichia coli with quartz crystal microbalance (QCM). Two different genetically engineered mutant proteins were utilized, each involving incorporation single cysteine into amino acid sequence protein. The immobilized on surface piezoelectric by direct sulfur−gold linkage. Since cysteines located at positions in sequence, receptors attach to orientations. Considering only mass effects,...

The growth kinetics of porous alumina films formed by anodic oxidation aluminum in phosphoric acid under galvanostatic conditions was studied. Scanning electron microscope measurements, Faraday's law, and oxide film mass measurements used to analyze the obtain rates, pore density, porosity. Current efficiency also determined from these measurements. effect current density solution temperature on rate morphology examined. found increase with an density. observed at low densities (7.5 mA/cm2),...

Abstract In this article, the results from a theoretical and experimental investigation of enzyme immobilization in porous membranes are reported. A model process, which accounts for restricted diffusion pores membrane, has been developed. The predicts effect kinetics time on distribution membrane. glucose oxidase oxidase–biotin conjugate alumina was experimentally investigated. Enzyme uptake data correlated to theory determine rate constant imobilization pore. Immobilization studies were...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the macroscopic structure heavy oils by measuring hydrodynamic propertiesRick L. Nortz, Ruth E. Baltus, and Parviz RahimiCite this: Ind. Eng. Chem. Res. 1990, 29, 9, 1968–1976Publication Date (Print):September 1, 1990Publication History Published online1 May 2002Published inissue 1 September 1990https://pubs.acs.org/doi/10.1021/ie00105a032https://doi.org/10.1021/ie00105a032research-articleACS PublicationsRequest reuse...

The irregular ionic lattice model (IILM) is applied to predict the vapor pressures and solubilities of carbon dioxide dissolved in 1-n-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) 1-n-octyl-3-methylimidazolium tetrafluoroborate ([C8mim][BF4]) liquids at temperatures ranging from 298.15 333.15 K. contains only two parameters; they are shown be independent an arbitrarily chosen reference state. parameters show a slight dependence on temperature, but this ignored computations...

Short-term microfiltration experiments were performed to measure the removal of two gram-negative bacteria (Brevundimonas diminuta and Serratia marcescens), bacterial viruses (PRD1 T4), several spherical silica particles in a stirred cell under convection-dominated conditions before onset fouling. These (bio)colloids ranged from being spherical- rod-shaped, with an aspect ratio range 1−9. Experimental measurements PRD1 bacteriophages good agreement theoretical predictions. A comparison...