Synthesis, characterization and catalytic performance of SAPO-34 molecular sieves for methanol-to-olefin (MTO) reaction
文献类型：期刊论文
| 作者 | Wang, Qian1; Wang, Lei2; Wang, Hui1; Li, Zengxi1; Wu, Hui2; Li, Guangming2; Zhang, Xiangping2; Zhang, Suojiang2 |
| 刊名 | ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
 |
| 出版日期 | 2011-07-01 |
| 卷号 | 6期号:4页码:596-605 |
| 关键词 | molecular sieve SAPO-34 solid acid catalysts methanol-to-olefin reaction MTO process TEA template concentration crystallization time |
| ISSN号 | 1932-2143 |
| 通讯作者 | Li, ZX |
| 英文摘要 | The methanol-to-olefin (MTO) process is important because it offers an alternative to the conventional oil route for the conversion of natural gas or coal to light olefins. The most promising catalysts for the MTO reaction are solid acids with a zeolite structure, where reactants and products such as ethylene and propylene may freely diffuse through active catalysts, but products with larger kinetic diameters are trapped within the cages. In this work, SAPO-34 molecular sieves were synthesized by hydrothermal crystallization, using triethylamine (TEA) as the template. These samples were characterized by X-ray diffraction, scanning electron microscopy, thermo-gravimetric analysis-differential scanning calorimetry, energy dispersive spectroscopy, Fourier transform-infrared (FT-IR) and N(2) adsorption-desorption. The effects of template concentration and crystallization time on the physicochemical properties and catalytic performance were investigated. The crystallinity and morphology of SAPO-34 were influenced by the concentration of the template. Pure SAPO-34 was obtained when the TEA/Al(2)O(3) molar ratio was higher than 2.0. With increased crystallization time, the Si content in SAPO-34 crystals increased, which influenced the surface acidity. FT-IR spectra indicated that all samples were dominated by Lewis acid sites and the sample crystallized for 11 h exhibited the lowest number of Lewis acid sites. The catalytic performance of SAPO-34 was tested with the MTO reaction. High selectivity to olefins (C(2)H(4) + C(3)H(6)) was obtained over the catalyst synthesized with a TEA/Al(2)O(3) ratio of 3.0 and crystallization time of 11 h. At the reaction temperature of 450 degrees C, the methanol conversion approached 100% and the yield of C(2)-C(4) olefins was more than 80%. Hence, SAPO-34 molecular sieves were shown to be excellent catalysts for the MTO reaction. (C) 2010 Curtin University of Technology and John Wiley & Sons, Ltd. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CRYSTALLIZATION ; CONVERSION ; SILICOALUMINOPHOSPHATE ; DIETHYLAMINE ; FRAMEWORK ; ZEOLITES ; TEMPLATE ; CRYSTALS ; SYSTEM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000294357400006 |
| 公开日期 | 2013-10-31 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4636]  |
| 专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Grad Univ, Coll Chem & Chem Engn, Beijing 10049, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Qian,Wang, Lei,Wang, Hui,et al. Synthesis, characterization and catalytic performance of SAPO-34 molecular sieves for methanol-to-olefin (MTO) reaction[J]. ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING,2011,6(4):596-605. |
| APA | Wang, Qian.,Wang, Lei.,Wang, Hui.,Li, Zengxi.,Wu, Hui.,...&Zhang, Suojiang.(2011).Synthesis, characterization and catalytic performance of SAPO-34 molecular sieves for methanol-to-olefin (MTO) reaction.ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING,6(4),596-605. |
| MLA | Wang, Qian,et al."Synthesis, characterization and catalytic performance of SAPO-34 molecular sieves for methanol-to-olefin (MTO) reaction".ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING 6.4(2011):596-605. |
入库方式： OAI收割
来源：过程工程研究所
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