کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
54261 | 47003 | 2014 | 10 صفحه PDF | دانلود رایگان |
• HZSM-5 and HMCM-22 produce different products in ethanol conversion.
• HZSM-5 leads to ethene, propene, and BTX formation.
• Coke is formed on the large channels of HMCM-22 and ethene on the smaller.
In the last years there has been an increasing interest for the use of ethanol not only as biofuel but also as raw material for the production of petrochemicals. In the present work the conversion of ethanol into hydrocarbons was investigated over zeolites with different acidic properties and porous structure (HZSM-5 and HMCM-22). The samples used were active for ethanol conversion and both their acidic properties and porous structure played an important role on product selectivity. HZSM-5 zeolite was the most promising catalyst for propene formation. Raman spectroscopy and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) were also employed to investigate the carbon species deposited on the zeolites and the adsorbed species formed during the reaction, respectively. DRIFTS results show that coke formation was severely inhibited by the pore structure of HZSM-5 justifying the high stability of this zeolite.
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Journal: Catalysis Today - Volume 234, 1 October 2014, Pages 182–191