| Autor: |
Peter Lovás, Vladimír Jorík, Michal Horňáček, Pavol Hudec |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Applied Catalysis A: General. 475:341-346 |
| ISSN: |
0926-860X |
| DOI: |
10.1016/j.apcata.2014.01.047 |
| Popis: |
Zeolite Y was tested as an alternative solid acid catalyst for the production of linear alkyl aromatics with the emphasis on its activity and stability towards regeneration. Liquid-phase alkylation of toluene with 1-decene at 100 °C was used as the model reaction. Deactivated catalyst samples were regenerated by the temperature programmed calcination (TPC) in air flow at 550 °C. The activity of the unmodified HY zeolite during alkylation was significant but decreased to a minimum after regeneration, as a result of a partial structure collapse during regeneration using TPC. To avoid the structure collapse hydrothermal stabilization of zeolite Y at 560, 670 and 780 °C was performed. Subsequent chemical dealumination using 0.5 M HCl or ion-exchange with the 2 M NH4NO3 solution, in order to improve the catalyst activity, were carried out. All the samples were then tested in alkylation. The main monitored parameters were the conversion of 1-decene, selectivity to 2-phenyldecane isomer and the amount of side-products. The sample stabilized at 560 °C and ion-exchanged subsequently showed the highest activity with the lowest amount of by-products. This sample was also regenerated and reused four times in the cycle alkylation–regeneration with no loss of structure or activity. In fact there was a slight activity increase of this sample after regeneration. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect