Size-controlled synthesis of MFI metallosilicate and their catalytic performance on acetone to olefins reaction

作者：Taniguchi Taichi; Nakasaka Yuta^*; Yoneta Keitaro; Tago Teruoki; Masuda Takao

来源：Microporous and Mesoporous Materials, 2016, 224: 68-74.

DOI：10.1016/j.micromeso.2015.10.043

• MFI
• Ferrisilicate
• Nano size zeolite
• Acetone to olefins reaction
• Light olefins synthesis

A series of Al- and Fe-MFI zeolites was synthesized using a hydrothermal treatment, and nano-sized MFI zeolites were obtained by an emulsion method. UV vis spectra and ac-NH3-TPD profiles demonstrated that Fe atoms were incorporated into the frameworks of the MFI structures and that almost all of the Fe3+ species were well dispersed without forming bulky iron oxide particles. The selective production of isobutylene from acetone was examined using Al- and Fe-MFI zeolites with different crystal sizes. The nano sized MFI zeolite exhibited a long catalyst lifetime compared with the macro-sized MFI zeolite. Although iso-butylene is normally an intermediate during acetone conversion over zeolite catalysts, the weak acidity of the Fe-MFI zeolite suppressed the completion of excessive reaction, leading to high selectivity for iso-butylene.

• 出版日期2016-4