In this study, zeolites prepared from fly ash pretreated with hydrochloric acid were used for catalysis. The synthesis was performed by a pre-fusion hydrothermal activation with low crystallization temperature (60 °C) and using both seawater and distilled water. The synthetic zeolites were tested via the base-catalyzed gas-phase alkylation of phenol using diethyl carbonate as an innovative alkylating agent, thus obtaining phenol conversions up to 95% with a selectivity of more than 85% in phenetole. These data indicate that the newly-formed zeolites are very selective for the O-ethylation of phenol also at high temperatures. Moreover, the results show that the zeolites formed from fly ash have a greater catalytic activity than that shown by commercial NaY and synthetic MgO, which were chosen as basic reference catalysts.
Gjyli S., Korpa A., Tabanelli T., Trettin R., Cavani F., Belviso C. (2019). Higher conversion rate of phenol alkylation with diethylcarbonate by using synthetic fly ash-based zeolites. MICROPOROUS AND MESOPOROUS MATERIALS, 284, 434-442 [10.1016/j.micromeso.2019.04.065].
Higher conversion rate of phenol alkylation with diethylcarbonate by using synthetic fly ash-based zeolites
Gjyli S.;Tabanelli T.;Cavani F.;
2019
Abstract
In this study, zeolites prepared from fly ash pretreated with hydrochloric acid were used for catalysis. The synthesis was performed by a pre-fusion hydrothermal activation with low crystallization temperature (60 °C) and using both seawater and distilled water. The synthetic zeolites were tested via the base-catalyzed gas-phase alkylation of phenol using diethyl carbonate as an innovative alkylating agent, thus obtaining phenol conversions up to 95% with a selectivity of more than 85% in phenetole. These data indicate that the newly-formed zeolites are very selective for the O-ethylation of phenol also at high temperatures. Moreover, the results show that the zeolites formed from fly ash have a greater catalytic activity than that shown by commercial NaY and synthetic MgO, which were chosen as basic reference catalysts.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
