| 水热处理对纳米HZSM-5分子筛酸性及催化甲醇制丙烯反应性能的影响 |
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| 引用本文： | 毛东森,郭强胜,孟涛,卢冠忠.水热处理对纳米HZSM-5分子筛酸性及催化甲醇制丙烯反应性能的影响[J].物理化学学报,2010,26(2):338-344. |
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| 作者姓名： | 毛东森 郭强胜 孟涛 卢冠忠 |
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| 作者单位： | Research Institute of Applied Catalysis, School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China |
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| 基金项目： | China (YJ2005-16). 上海市教委重点科研项目，上海市教委重点学科建设项目，上海应用技术学院引进人才科研启动项目 |
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| 摘 要： | 对纳米HZSM-5分子筛进行水热处理,利用N2吸附-脱附、X射线衍射(XRD)、铝固体核磁共振(27AlMASNMR)、氨-程序升温脱附(NH3-TPD)和吡啶吸附傅立叶变换红外(FT-IR)光谱等技术对改性前后样品的结构和酸性进行了详细表征,并在常压、500℃和甲醇质量空速(WHSV)为1.0h-1的反应条件下,在连续流动微型固定床反应器上考察了其催化甲醇转化制丙烯反应的性能.结果表明,适度的水热处理使纳米HZSM-5分子筛骨架脱铝并经柠檬酸洗涤而除去,酸量减少,酸强度降低,孔容和孔径增大,从而使丙烯的选择性和维持甲醇完全转化的反应时间(即催化剂寿命)分别由改性前的30.1%和75h显著提高至38.9%和160h.但过高温度的水热处理使纳米HZSM-5分子筛的酸性明显减弱,强酸中心几乎完全消失,故使丙烯的选择性和催化剂的稳定性反而大大降低.
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| 关 键 词： | 水热处理 纳米HZSM-5分子筛 甲醇 丙烯 选择性 稳定性 |
| 收稿时间： | 2009-10-13 |
| 修稿时间： | 2009-11-13 |
Effect of Hydrothermal Treatment on the Acidity and Catalytic Performance of Nanosized HZSM-5 Zeolites for the Conversion of Methanol to Propene |
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| MAO Dong-Sen,GUO Qiang-Sheng,MENG Tao,LU Guan-Zhong.Effect of Hydrothermal Treatment on the Acidity and Catalytic Performance of Nanosized HZSM-5 Zeolites for the Conversion of Methanol to Propene[J].Acta Physico-Chimica Sinica,2010,26(2):338-344. |
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| Authors: | MAO Dong-Sen GUO Qiang-Sheng MENG Tao LU Guan-Zhong |
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| Institution: | Research Institute of Applied Catalysis, School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China |
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| Abstract: | A series of modified nanosized HZSM-5 zeolites were prepared by hydrothermal treatment at different temperatures and characterized by the adsorption and desorption of N2,X-ray diffraction (XRD),Al solid state magic angle spinning nuclear magnetic resonance (27Al MAS NMR),temperature-programmed desorption of ammonia (NH3-TPD),and Fourier transform infrared (FT-IR) spectroscopy of adsorbed pyridine techniques. The conversion of methanol to propene was tested using a continuous flow fixed-bed microreactor at a... |
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| Keywords: | Hydrothermal treatment Nanosized HZSM-5 zeolite Methanol Propene Selectivity Stability |
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