载体对负载型NiSn催化剂丙烷脱氢性能的影响

研究了载体对负载型Ni Sn催化剂丙烷脱氢性能的影响,主要对比考察了以Si O2、Mg O、Al2O3、Mg Al2O4为载体的Ni Sn催化剂的丙烷脱氢性能。采用X射线衍射技术(XRD)、氮气吸附-脱附技术、氨气程序升温脱附技术(NH3-TPD)以及氢气程序升温还原技术(H2-TPR)对催化剂样品进行表征。结果表明,Si O2因具有较大的比表面积、大孔径、酸性较弱等特点,以其为载体制备所得催化剂中Ni2.67Sn2组分含量高,催化剂性能较高。

Propane dehydrogenation over NiSn-based catalysts

In this paper, we studied the effects of supports, such as SiO₂, MgO, Al₂O₃ and MgAl₂O₄, on the performance of supported NiSn catalyst for propane dehydrogenation. NH₃ temperature-programmed desorption, H₂ temperature-programmed reduction were applied for the characterization of the catalysts. The results show that SiO₂ with large specific surface area and large pore size can achieve good contact between catalyst and reactants, leading to a high content of Ni_2.67Sn₂ alloy and a reduced diffusion resistance, In addition, their weak acid improve dehydrogenation activity and propene selectivity.