TY - JOUR
T1 - Effect of Pt on stability of nano-scale ZSM-5 catalyst for toluene alkylation with methanol into p-xylene
AU - Zhao, Yan
AU - Tan, Wei
AU - Wu, Hongyu
AU - Zhang, Anfeng
AU - Liu, Min
AU - Li, Guimin
AU - Wang, Xiangsheng
AU - Song, Chunshan
AU - Guo, Xinwen
PY - 2011/2/2
Y1 - 2011/2/2
N2 - 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 was obtained. Even after 500 h on stream, toluene conversion of 22.0-23.0% was achieved simultaneously with the para-selectivity of >98%. The presence of Pt on the modified nano-scale HZSM-5 solves the apparent paradox of high para-selectivity and low stability. Catalysts were characterized by using X-ray diffraction (XRD), temperature programmed desorption of ammonia (NH3-TPD), Pyridine IR (Py-IR), TG-SDTA, scanning electron microscope (SEM), etc. The results show that significant enhancement in stability over Pt-modified nano-scale HZSM-5 catalysts is mainly due to good hydrogenation properties of Pt particles.
AB - 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 was obtained. Even after 500 h on stream, toluene conversion of 22.0-23.0% was achieved simultaneously with the para-selectivity of >98%. The presence of Pt on the modified nano-scale HZSM-5 solves the apparent paradox of high para-selectivity and low stability. Catalysts were characterized by using X-ray diffraction (XRD), temperature programmed desorption of ammonia (NH3-TPD), Pyridine IR (Py-IR), TG-SDTA, scanning electron microscope (SEM), etc. The results show that significant enhancement in stability over Pt-modified nano-scale HZSM-5 catalysts is mainly due to good hydrogenation properties of Pt particles.
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U2 - 10.1016/j.cattod.2010.05.036
DO - 10.1016/j.cattod.2010.05.036
M3 - Article
AN - SCOPUS:78951471567
SN - 0920-5861
VL - 160
SP - 179
EP - 183
JO - Catalysis Today
JF - Catalysis Today
IS - 1
ER -