Synthesis, characterization and catalytic performance of a novel magnetic SO4 2−-Y2O3-Fe3O4-ZrO2 solid acid catalyst

Abstract

A novel magnetic SO 4 2--Y 2 O 3 -Fe 3 O 4 -ZrO 2 solid acid catalyst was prepared by the co-precipitation method. The results revealed that the introduction of Y 2 O 3 improved markedly the thermal stability of tetragonal zirconia. The catalyst exhibited high catalytic activity and stability in cyclohexanone condensation.

Light FCC gasoline olefin oligomerization over a magnetic NiSo4/γ‐Al2o3 catalyst in a magnetically stabilized bed

“…The specific saturation magnetization of the sample was 15.0 emu g 21 , which is higher than that of other reported magnetic solid acid catalysts. 32,33 Figure 3b shows the XPS spectra of the magnetic NiSO 4 / c-Al 2 O 3 -7 catalyst. According to the X-ray fluorescence results, the catalyst contained 20.9 % (wt) Fe 3 O 4 , however, it could be seen from the XPS spectra that there was no Fe element on the surface of the catalyst.…”

“…Fe 3 O 4 or c-Fe 2 O 3 ). 33,34 These magnetic catalysts had specific saturation magnetization of less than 12.0 emu g 21 , and are usually used as heterogeneous catalysts in a batch process, using a magnetic field to separate the catalyst from the product at the end of the reaction.…”