The Catalytic Dehydration of Bio-ethanol to Ethylene on SAPO-34 Catalysts |
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| Authors: | L. Wu T. Zhou Q. Cui H. Wang Y. Hu H. Huang |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Nanjing University of Technology , Nanjing , China;2. College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology , Nanjing , China |
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| Abstract: | SAPO-34 catalysts were synthesized by hydrothermal method, and characterized by X-ray diffraction (XRD), NH3 temperature-programmed desorption (NH3-TPD) and thermogravimetric-differential thermal analysis (TG-DTA). The synthesized catalysts were tested for dehydration of bio-ethanol to ethylene in comparison with commercial ZSM-5 and γ-Al2O3. The home-made SAPO-34 catalysts exhibited similar bio-ethanol conversion and ethylene selectivity at 60°C and 110°C lower compared to commercial ZSM-5 and γ-Al2O3 catalysts, respectively, indicating higher low-temperature activity. It was found that the crystallinity and surface acidity of synthesized SAPO-34 decreased after 4 h on stream, which is attributed to the carbonaceous deposits on catalyst confirmed by TG-DTA. |
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| Keywords: | catalyst characterized ethanol ethylene SAPO-34 |
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