METHOD AND EQUIPMENT FOR MEASURING THE HIGH-PRESSURE SORPTION ISOTHERMS OF SUPERCRITICAL FLUIDS AND GASES

The invention relates to a piece of equipment that is used to perform a method for measuring the quantity of a supercritical fluid or gas absorbed by a sample, including a distributor (2) and a cell (4) for the sample, which can be communicated with one another. The inventive method comprises the fo...

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Main Authors GADEA RAMOS, ENRIQUE, LINARES SOLANO, ANGEL, JORDA BENEYTO, MARIA, SUAREZ GARCIA, FABIAN, CAZORLA AMOROS, DIEGO
Format Patent
LanguageEnglish
Spanish
Published 08.04.2011
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Abstract The invention relates to a piece of equipment that is used to perform a method for measuring the quantity of a supercritical fluid or gas absorbed by a sample, including a distributor (2) and a cell (4) for the sample, which can be communicated with one another. The inventive method comprises the following steps: the free volume of the sample cell (4) is calibrated by determining a mass balance for a calibration gas in the distributor/cell unit, the effective temperature of the sample cell is calculated by determining a mass balance for the calibration gas in the distributor/cell unit, and the quantity of supercritical fluid or gas sorbed by the sample is calculated by determining a mass balance for the supercritical fluid or gas in the distributor/cell unit, using a real gas equation in each of said steps in order to define the state of the supercritical fluid or gas. Equipo y método para la medida de isotermas de sorción a presiones elevadas de gases y fluidos supercríticos. El equipo consta de: un distribuidor, al menos una celda de muestra, una fuente de gas, una fuente de vacío, un sensor de presión para medir la presión del distribuidor y de la celda de muestra, un conjunto de conducciones y válvulas de corte que unen entre sí las partes del equipo mencionadas.El método descrito permite obtener con precisión la cantidad de gas sorbida por una muestra hasta presiones de varios miles de atmósferas en un amplio rango de temperaturas considerando, que el estado de los gases puede no ser bien descrito por la ley de los gases ideales, que puede haber sorción del gas de calibrado en la determinación del volumen de la celda de muestra y/o que ésta puede no encontrarse en su totalidad a la temperatura de análisis.
AbstractList The invention relates to a piece of equipment that is used to perform a method for measuring the quantity of a supercritical fluid or gas absorbed by a sample, including a distributor (2) and a cell (4) for the sample, which can be communicated with one another. The inventive method comprises the following steps: the free volume of the sample cell (4) is calibrated by determining a mass balance for a calibration gas in the distributor/cell unit, the effective temperature of the sample cell is calculated by determining a mass balance for the calibration gas in the distributor/cell unit, and the quantity of supercritical fluid or gas sorbed by the sample is calculated by determining a mass balance for the supercritical fluid or gas in the distributor/cell unit, using a real gas equation in each of said steps in order to define the state of the supercritical fluid or gas. Equipo y método para la medida de isotermas de sorción a presiones elevadas de gases y fluidos supercríticos. El equipo consta de: un distribuidor, al menos una celda de muestra, una fuente de gas, una fuente de vacío, un sensor de presión para medir la presión del distribuidor y de la celda de muestra, un conjunto de conducciones y válvulas de corte que unen entre sí las partes del equipo mencionadas.El método descrito permite obtener con precisión la cantidad de gas sorbida por una muestra hasta presiones de varios miles de atmósferas en un amplio rango de temperaturas considerando, que el estado de los gases puede no ser bien descrito por la ley de los gases ideales, que puede haber sorción del gas de calibrado en la determinación del volumen de la celda de muestra y/o que ésta puede no encontrarse en su totalidad a la temperatura de análisis.
Author LINARES SOLANO, ANGEL
SUAREZ GARCIA, FABIAN
GADEA RAMOS, ENRIQUE
JORDA BENEYTO, MARIA
CAZORLA AMOROS, DIEGO
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DocumentTitleAlternate EQUIPO Y METODO PARA LA MEDIDA DE ISOTERMAS DE SORCION A PRESIONES ELEVADAS DE GASES Y FLUIDOS SUPERCRITICOS.
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Snippet The invention relates to a piece of equipment that is used to perform a method for measuring the quantity of a supercritical fluid or gas absorbed by a sample,...
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SubjectTerms INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
Title METHOD AND EQUIPMENT FOR MEASURING THE HIGH-PRESSURE SORPTION ISOTHERMS OF SUPERCRITICAL FLUIDS AND GASES
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