在PtSnNaLa/ZSM-5催化剂中引入氟元素,制得用于丙烷脱氢反应的氟改性催化剂,利用X射线衍射(XRD)、NH3吸脱附(NH3-TPD)、红外(FT-IR)、固体核磁(27Al MAS NMR)和程序升温还原(H2-TPR)等技术手段研究不同氟含量对催化剂的结构、表面酸性...在PtSnNaLa/ZSM-5催化剂中引入氟元素,制得用于丙烷脱氢反应的氟改性催化剂,利用X射线衍射(XRD)、NH3吸脱附(NH3-TPD)、红外(FT-IR)、固体核磁(27Al MAS NMR)和程序升温还原(H2-TPR)等技术手段研究不同氟含量对催化剂的结构、表面酸性和丙烷脱氢反应性能的影响。结果表明,氟能降低催化剂表面的弱酸强度,增强Pt与载体间的相互作用力,降低反应副产物的选择性,从而提高了产物丙烯的选择性,当氟的添加量为0.2%时,丙烯选择性可达到99.2%。同时氟的加入易于载体骨架的脱铝,使得Sn组分的还原变得相对容易,但对催化剂结构没有明显的影响。展开更多
The English edition of Acta Meteorologica Sinica (AMS) is a quarterly journal edited by the Chinese Meteorological Society. It is intended to provide a base for reinforcing the inter-national exchange of scientific id...The English edition of Acta Meteorologica Sinica (AMS) is a quarterly journal edited by the Chinese Meteorological Society. It is intended to provide a base for reinforcing the inter-national exchange of scientific ideas and thoughts between Chinese and foreign meteorologists.For this purpose,along with some translated papers selected from Chinese edition of AMS,展开更多
文摘在PtSnNaLa/ZSM-5催化剂中引入氟元素,制得用于丙烷脱氢反应的氟改性催化剂,利用X射线衍射(XRD)、NH3吸脱附(NH3-TPD)、红外(FT-IR)、固体核磁(27Al MAS NMR)和程序升温还原(H2-TPR)等技术手段研究不同氟含量对催化剂的结构、表面酸性和丙烷脱氢反应性能的影响。结果表明,氟能降低催化剂表面的弱酸强度,增强Pt与载体间的相互作用力,降低反应副产物的选择性,从而提高了产物丙烯的选择性,当氟的添加量为0.2%时,丙烯选择性可达到99.2%。同时氟的加入易于载体骨架的脱铝,使得Sn组分的还原变得相对容易,但对催化剂结构没有明显的影响。
基金supported by the National Natural Science Foundation of China(21776129,21706121,and U22B6011)the Natural Science Foundation of Jiangsu Province(BK20170995 and BK20201120)the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。
文摘The English edition of Acta Meteorologica Sinica (AMS) is a quarterly journal edited by the Chinese Meteorological Society. It is intended to provide a base for reinforcing the inter-national exchange of scientific ideas and thoughts between Chinese and foreign meteorologists.For this purpose,along with some translated papers selected from Chinese edition of AMS,
