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RESEARCH PRODUCT

Characterization and utilization of MFI zeolites and MCM-41 materials for gaseous pollutant adsorption

O. BertrandM. BroyerV. FrançoisGuy WeberJ. P. BellatF. BouvierS. Maure

subject

ThermogravimetryAdsorptionMCM-41PhysisorptionChemistryInorganic chemistryMicroporous materialMesoporous materialZeoliteMolecular sieve

description

Physisorption of n-hexane, trichloroethylene, tetrachloroethylene, carbon and nitrogen oxides on a microporous ZSM-5 (Si/Al=339) zeolite and an amorphous mesoporous MCM-41 (Si/Al=∞) sample was examined by isothermal thermogravimetry, manometry and calorimetry to evaluate the feasibility of using these porous materials for gaseous pollutant adsorption at room temperature. The adsorbents showed very interesting adsorption properties for hydrocarbons. ZSM-5 exhibited the strongest adsorption affinity and MCM-41 showed the largest adsorption capacity. Another main feature in this work was to observe a stepped-isotherm for the adsorption of C2Cl4 on ZSM-5. Such a substep located at very low relative pressure, accounted for a heterogeneous adsorption process. Concerning the adsorption of CO2 and N2O on the porous samples, ZSM-5 and MCM-41 showed too low affinities and adsorption capacities to be used as efficient adsorbents at room temperature.

yearjournalcountryeditionlanguage
1999-01-01
https://doi.org/10.1016/s0167-2991(99)80281-x