Cerium-doped γ-Al₂O₃ (Ce-γAl₂O₃) catalyst supports are prepared with various amounts of cerium (0.2–5 wt.%). An excess solvent impregnation method is used to saturate the vanadium (5 wt%) on the cerium-modified supports. The XRD and FTIR characterization techniques indicate the presence of crystalline CeO₂ phase, and amorphous VO_x phases on the γAl₂O₃. Raman analysis shows the coexistence of poly-vanadate and mono-vanadate species. BET analysis reveals a high surface area for the synthesized catalysts with a type-IV adsorption isotherm. TPR/TPO analyses show that VO_x/Ce-γAl₂O₃ catalysts are very active and stable over repeated reduction/oxidation cycles. The stability/purity of the synthesized catalyst is also confirmed by TGA analysis. NH₃-TPD characterization shows mild acidity while the TPR kinetics predicts lower activation energy for reduction. Oxidative dehydrogenation (ODH) of ethane experiments are developed over VO_x/Ce-γAl₂O₃ catalysts under gas-phase oxygen-free conditions in a fluidized CREC Riser Simulator. Temperatures and residence times are varied between 450 and 600 °C and 10–50 s, respectively. A maximum ethylene selectivity of 87.9% with 10.0% ethane conversion is achieved at 550 °C using the 1.0 wt.% cerium-doped VO_x/γ-Al₂O₃ catalyst. The successive ethane injections and subsequent catalyst regeneration show the stable redox characteristics of the prepared ODH catalysts.

铈掺杂γAl ₂ ö ₃（CE-γAl ₂ ö ₃）催化剂载体与不同量的铈的制备（0.2-5重量％）。使用过量的溶剂浸渍方法来使铈改性的载体上的钒（5重量％）饱和。XRD和FTIR表征技术表明结晶的CeO存在₂相和非晶VO _X相上γAl ₂ Ó ₃。拉曼分析显示了多钒酸盐和单钒酸盐物质并存。BET分析显示具有IV型吸附等温线的合成催化剂具有较高的表面积。TPR / TPO分析表明，VO _X / CE-γAl ₂ ö_3种催化剂在重复的还原/氧化循环中具有很高的活性和稳定性。合成催化剂的稳定性/纯度也通过TGA分析得到证实。NH ₃ -TPD表征显示出适度的酸性，而TPR动力学预测降低了还原的活化能。氧化脱氢（ODH）的乙烷实验超过VO被开发_X / CE-γAl _2点ö ₃气相无氧条件下的催化剂在流化床CREC冒口模拟器。温度和停留时间分别在450至600°C和10–50 s之间变化。的87.9％与10.0％的乙烷转化最大的乙烯选择性在550℃下使用1.0重量来实现。％的铈掺杂VO _X /γ-Al系₂O ₃催化剂。连续的乙烷注入和随后的催化剂再生显示了所制备的ODH催化剂的稳定的氧化还原特性。