Effect of Pt on stability of nano-scale ZSM-5 catalyst for toluene alkylation with methanol into p-xylene
作者： Yan Zhao , Wei Tan , Hongyu Wu , Anfeng Zhang , Min Liu
DOI: 10.1016/J.CATTOD.2010.05.036
关键词:
摘要: Abstract Shape-selective methylation of toluene (T) with methanol (M) was carried out in continuous flow fixed-bed reactor over Pt-modified nano-scale HZSM-5 catalysts, and excellent stability obtained. Even after 500 h on stream, conversion 22.0–23.0% achieved simultaneously the para-selectivity >98%. The presence Pt modified solves apparent paradox high low stability. Catalysts were characterized by using X-ray diffraction (XRD), temperature programmed desorption ammonia (NH3-TPD), Pyridine IR (Py-IR), TG-SDTA, scanning electron microscope (SEM), etc. results show that significant enhancement catalysts is mainly due to good hydrogenation properties particles.
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