Breakthrough adsorption offers many advantages over static adsorption measurements. Multicomponent breakthrough measurements are performed by flowing multiple gas or vapor streams. A mass spectrometer measures the outlet concentration of the breakthrough column. The data is then assessed to determine the adsorption and separation performance of a material. Multicomponent measurements can be analyzed using a mass spectrometer for a large variety of gases and vapors. For isomeric compounds, that have overlapping mass spectrums, an FTIR is the preferred instrument for analyzing the outlet concentration of a breakthrough system.
In this note, single and multicomponent vapor mixtures are analyzed for zeolite 13X on the Micromeritics BreakThrough Analyzer (BTA). Vapor flows of water and ethanol were analyzed independently, masses 18 and 46 respectively, using a mass spectrometer. These measurements were conducted at 50 °C using equimolar carrier gas flowrates of nitrogen and helium.
The breakthrough system generates vapor streams by flowing an inert gas through a bubbler. Bubblers have been shown to be very efficient at generating saturated vapor streams at low flowrates. All components of the breakthrough system are housed within a hotbox, this prevent condensation of vapor streams and allows for a constant temperature throughout the analysis. Water and ethanol at 50 °C in an inert carrier gas will generate a saturated stream at the following vapor pressures: water 0.124 bar and ethanol 0.292 bar.
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Breakthrough adsorption offers many advantages over static adsorption measurements. Multicomponent breakthrough measurements are performed by flowing multiple gas or vapor streams. A mass spectrometer measures the outlet concentration of the breakthrough column. The data is then assessed to determine the adsorption and separation performance of a material. Multicomponent measurements can be analyzed using a mass spectrometer for a large variety of gases and vapors. For isomeric compounds, that have overlapping mass spectrums, an FTIR is the preferred instrument for analyzing the outlet concentration of a breakthrough system.
In this note, single and multicomponent vapor mixtures are analyzed for zeolite 13X on the Micromeritics BreakThrough Analyzer (BTA). Vapor flows of water and ethanol were analyzed independently, masses 18 and 46 respectively, using a mass spectrometer. These measurements were conducted at 50 °C using equimolar carrier gas flowrates of nitrogen and helium.
The breakthrough system generates vapor streams by flowing an inert gas through a bubbler. Bubblers have been shown to be very efficient at generating saturated vapor streams at low flowrates. All components of the breakthrough system are housed within a hotbox, this prevent condensation of vapor streams and allows for a constant temperature throughout the analysis. Water and ethanol at 50 °C in an inert carrier gas will generate a saturated stream at the following vapor pressures: water 0.124 bar and ethanol 0.292 bar.
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