Methanol conversion on metal-incorporated SAPO-34s (MeAPSO-34s)

The influence on metal incorporation into the framework of SAPO-34 (MeAPSO- 34) on methanol conversion was investigated in this study. Used MeAPSO-34s (SAPO-34, FeAPSO-34, CoAPSO-34, and NiAPSO-34) were acquired by the rapid c rystallization method. In characteristics, it was identified that these cat alysts had a uniformly regular form with a sharp distribution in particle s ize. The performances on methanol conversion for these catalysts were diffe rent according to the properties of metals. As a result, the methanol conve rsion was enhanced on the metal-incorporated catalyst compared with the non -metal catalyst. In reaction at 450 degrees C for 1 h, the order of increas ing in ethylene selectivity was followed as next; Ni- > Co- > Fe- > non-met al-incorporated SAPO-34. On the other hand, the selectivity for all the sam ples decreased with an increase in reaction time, however, the reduced rate was very slow on CoAPSO-34 compared with the other catalysts. In addition as a surprising result, the CoAPSO-34 catalyst exhibited a minor methanatio n. (C) 2000 Elsevier Science B.V. All rights reserved.