期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 297, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2020.110046
关键词
Microencapsulated SAPO-34; Calcination temperature; Composition; Spray drying; Fluidized bed reactor; Methanol to olefin
类别
资金
- Iran Nanotechnology Initiative Council
- Sahand University of Technology
The reported research can be related to the investigation of MTO catalysts prepared via spray drying method and the corresponding catalytic evaluation with the aim of improving SAPO-34 catalyst strength and reduce its abrasion. Slurry composition and calcination temperature effect on the production of fluidizable micro encapsulated catalysts was taken into account Characterization of the spray dried samples was investigated by NH3-TPD, BET-BJH, XRD, EDX, FESEM, MR and TGA analysis. Intensity reduction of the reflections at 2 theta = 12.5 and 24.7 degrees and disappearing from the XRD pattern at calcination temperatures higher than 550 degrees C proves the conversion of kaolinite phase to metakaolinite. The results demonstrate new Bronsted acid site for the spray dried sample compared to the results of bare SAPO-34. Thus, the optimized values for the composition of the spray drying slurry and the corresponding final calcination temperature were reported for the fluidizable MTO catalyst. KA-SAPO (S/K = 0.8 Al = 11 T = 550) catalyst was introduced as an acceptable catalyst in MTO process having life time of 900 min in fluidized bed reactor.
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