Ga(Ta,Nb)SiBEA zeolites with Ta(V), Nb(V) and Ga(III)-single sites were prepared by two-step post-synthesis preparation procedure as evidenced by X-ray Diffraction, Fourier Transform Infrared Spectroscopy (FT–IR), ⁷¹Ga Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy and X-ray Photoelectron Spectroscopy. The acid–base properties of the zeolite catalysts were studied by Temperature-Programmed Desorption of NH₃ and CO₂ with mass-spectrometry control and FT–IR spectroscopy of adsorbed pyridine. The catalytic performance of the Ga(Ta,Nb)SiBEA was tested in the process of oxidative dehydrogenation of propane to propylene with CO₂. For Ga_4.0SiBEA zeolite catalyst the propane conversion of 57.5% and propene selectivity of 64–73% at 873 K was achieved. For Ga_1.0-, Ga_2.0Ta_2.0- and Ga_2.0Nb_2.0SiBEA catalysts a higher propylene selectivity of 70–77% was reached. The key role of weak and medium strength Lewis acid sites related to the presence of well dispersed framework Ga(III) was determined for the target process.

具有 Ta(V)、Nb(V) 和 Ga(III) 单位点的 Ga(Ta,Nb)SiBEA 沸石是通过两步合成后制备程序制备的，如 X 射线衍射、傅里叶变换红外光谱证明（ FT-IR)、⁷¹ Ga 魔角自旋核磁共振光谱和 X 射线光电子光谱。沸石催化剂的酸碱性质通过NH ₃和CO ₂的程序升温脱附与质谱控制和吸附吡啶的FT-IR光谱进行研究。测试了Ga(Ta,Nb)SiBEA在丙烷与CO ₂氧化脱氢制丙烯过程中的催化性能。对于 Ga _4.0SiBEA 沸石催化剂在 873 K 下实现了 57.5% 的丙烷转化率和 64-73% 的丙烯选择性。对于 Ga _1.0 -、Ga _2.0 Ta _2.0 - 和 Ga _2.0 Nb _2.0 SiBEA 催化剂，达到了 70-77% 的更高丙烯选择性。为目标工艺确定了与存在良好分散的骨架 Ga(III) 相关的弱和中强度路易斯酸位点的关键作用。