INVESTIGADORES
BOIX Alicia Viviana
artículos
Título:
FTIR study of toluene adsorption on Cs-exchanged mordenites
Autor/es:
SERRA, RAMIRO; MIRÓ, EDUARDO E.; BOIX, ALICIA V.
Revista:
MICROPOROUS AND MESOPOROUS MATERIALS
Editorial:
Elsevier
Referencias:
Lugar: Atlanta; Año: 2010 vol. 127 p. 182 - 189
ISSN:
1387-1811
Resumen:
The adsorption capacity of toluene on Cs-exchanged mordenite and the interaction of the hydrocarbon
molecules with the adsorption sites were studied. For this purpose, flowadsorption measurements were
performed to obtain breakthrough and TPD curves. A detailed FTIR characterization of adsorbed toluene
was also carried out. The results show that the interaction between the toluene ring C@C bond and the
basic sites and steric restrictions originated in the formation of Cs oxides modulates both the adsorption
capacity and the retention strength of the samples.
The exchange of Cs in both the NH4MOR and NaMOR samples decreased the toluene adsorption capacity
at 100 C but increased the retention strength at higher temperatures. Samples derived from the Csexchange
in NaMOR showed higher retention strength than those obtained from NH4MOR due to the
higher basicity of the former. On the other hand, the CsNaMOR sample containing 19 wt.% of Cs showed
a lower retention strength at high temperatures if compared to the samples containing 7 wt.%. This suggests
an optimal basicity in samples with intermediate levels of Cs loading.@C bond and the
basic sites and steric restrictions originated in the formation of Cs oxides modulates both the adsorption
capacity and the retention strength of the samples.
The exchange of Cs in both the NH4MOR and NaMOR samples decreased the toluene adsorption capacity
at 100 C but increased the retention strength at higher temperatures. Samples derived from the Csexchange
in NaMOR showed higher retention strength than those obtained from NH4MOR due to the
higher basicity of the former. On the other hand, the CsNaMOR sample containing 19 wt.% of Cs showed
a lower retention strength at high temperatures if compared to the samples containing 7 wt.%. This suggests
an optimal basicity in samples with intermediate levels of Cs loading.4MOR and NaMOR samples decreased the toluene adsorption capacity
at 100 C but increased the retention strength at higher temperatures. Samples derived from the Csexchange
in NaMOR showed higher retention strength than those obtained from NH4MOR due to the
higher basicity of the former. On the other hand, the CsNaMOR sample containing 19 wt.% of Cs showed
a lower retention strength at high temperatures if compared to the samples containing 7 wt.%. This suggests
an optimal basicity in samples with intermediate levels of Cs loading.4MOR due to the
higher basicity of the former. On the other hand, the CsNaMOR sample containing 19 wt.% of Cs showed
a lower retention strength at high temperatures if compared to the samples containing 7 wt.%. This suggests
an optimal basicity in samples with intermediate levels of Cs loading.