| 刘梦洋,荣欣,顾彬,孙承林.铝硼复合氧化物负载Pt-Sn催化剂的丙烷脱氢性能研究[J].分子催化,2019,33(5):412-419 |
| 铝硼复合氧化物负载Pt-Sn催化剂的丙烷脱氢性能研究 |
| Propane Dehydrogenation of Pt-Sn Metal Loaded on Aluminum-boron Composite Oxide |
| 投稿时间：2019-08-17 修订日期：2019-11-08 |
| DOI： |
| 中文关键词: 铝硼复合氧化物 PtSn/(AlBx)2O3催化剂 丙烷脱氢 |
| 英文关键词:aluminum-boron composite oxides PtSn/(AlBx)2O3 catalyst propane dehydrogenation |
| 基金项目:国家自然青年科学基金项目（21802135） |
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| 中文摘要: |
| 采用蒸发自组装法制备铝硼复合氧化物（（AlBx）2O3），真空配合浸渍法制备PtSn双金属催化剂，并应用于丙烷脱氢制丙烯.采用N2物理吸附、SEM、TEM、XRD、H2-TPR、NH3-TPD、TG和ICP-OES对催化剂进行表征.掺入B可大幅增加载体的总酸量和酸中心密度，降低酸强度.当B掺入量为Al的10%时，Cat-AB0.1的总酸量是Cat-AB0总酸量的2.45倍，且只有弱酸中心.当B掺入量为Al的50%时，Cat-AB0.5的酸中心密度是Cat-AB0的4.3倍.以铝硼复合氧化物负载的催化剂均优于纯氧化铝负载的催化剂，催化剂的脱氢活性和稳定性与载体的硼铝摩尔比之间存在如下规律：AB0.1 > AB0.3 > AB0.5 > AB0. |
| 英文摘要: |
| The aluminum-boron composite oxide ((AlBx)2O3) was synthesized by evaporation induced self-assembly method, and the PtSn supported bimetallic catalysts were prepared by vacuum complex impregnation method. The catalytic activity of direct dehydrogenation of propane to propylene was investigated. The catalysts were characterized by N2 physisorption, SEM, TEM, ICP-OES, X-ray powder diffraction, H2-TPR, NH3-TPD and TG analysis, respectively. B doping dramatically enhanced the total acidity and surface acid sites density, but weakened the acid strength of catalysts. Doped with 10% of B, the total acidity of Cat-AB0.1 is 2.45 times higher than that of Cat-AB0, and only weak and medium acid sites were observed. The acid sites density of Cat-AB0.5 was 3.3 times higher than that of Cat-AB0. The activity and stability of catalysts supported by aluminum-boron composite oxides were generally superior to that by pure alumina, showing the order of Cat-AB0.1 > Cat-AB0.3 > Cat-AB0.5 > Cat-AB0. |
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