0000000000321086

AUTHOR

Mh Simonot-grange

showing 2 related works from this author

TCE adsorption on hydrophobic Y and MFI zeolites. Possibilities of using such materials for solvent recovery

1996

Des isothermes d'adsorption de la vapeur d'eau et du tetrachloroethene (TCE) ont ete tracees a 25°C pour etudier le caractere hydrophobe et organophile et la porosite de faujasites Y et d'une zeolithe ZSM-5 desaluminees. Les quantites de solvant adsorbe en phase vapeur pure ou en atmosphere ambiante sont peu differentes du fait du caractere hydrophobe des echantillons. Ces derniers presentent une grande capacite d'adsorption vis-a-vis du TCE. Contrairement au charbon actif, une zeolithe Y desaluminee saturee avec du TCE peut etre totalement regeneree a basse temperature (T<100°C) et de ce fait son utilisation potentielle pour une recuperation propre des solvants est digne d'interet.

StereochemistryChemistry02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesBiochemistry0104 chemical sciencesSolvent[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistryAdsorptionSorption isotherm0210 nano-technologyZeoliteComputingMilieux_MISCELLANEOUSNuclear chemistry
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Zeolite-gas systems and solar refrigeration : a study of the adsorptive properties at high pressures in the R22 freon-13X zeolite and ammonia-13X zeo…

1990

The adsorption of ammonia and R22 freon on 13X zeolite was studied in the conditions of possible use of these fluids in heat machines for solar refrigeration. The ranges of temperature and pressure, investigated in this study, extended from 0 to 80 °C and from 10-1 to 6 105 Pa respectively. The adsorption isotherms were collected by microgravimetry using a thermobalance specially built to be used in aggressive gases at pressures up to 106 Pa. Weak hysteresis was detected when ammonia was desorbed below 80 °C. A critical study concerning both applicability of classical adsorption equations (Dubinin-Radushkevitch and Langmuir) and comparison with other zeolite-gas systems is presented. Compar…

LangmuirFreonbusiness.industryRefrigerationBiochemistryAmmoniachemistry.chemical_compoundHysteresisAdsorptionchemistryChemical engineeringPhysical chemistryZeolitebusinessThermal energyJournal de Chimie Physique
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