The effect of Ga, V, and Zr content on the structural properties and the catalytic behavior of H-ZSM-5 monolithic catalysts-supported gallium oxide, vanadium oxide, and zirconium oxide in the oxidative dehydrogenation of propane (ODHP) have been investigated in a continuous tubular microreactor using CO₂ as a mild oxidant. The SEM-EDX confirmed the homogeneous distribution of metal oxides within printed metal oxide/H-ZSM-5 monolithic catalysts The ODHP reaction was carried out in the absence of CO₂ (5 mol% propane, balanced with N₂) and presence of CO₂ (2.5 mol% propane, 5 mol% CO₂ balanced with N₂) at 500, 550, 600, and 650 ℃, 1 bar, and a space velocity of 4500 mL/g_cat.hr. Among all synthesized Ga, V, and Zr/H-ZSM-5 monolithic catalysts, 15V-15Zr@ZSM-5 catalyst exhibits both high activity and stability for dehydrogenation of propane, with a propane conversion of 38 % and propylene selectivity of 90 % without any observable trend of benzene, toluene, xylene (BTX) production and catalyst deactivation in 6 h time on stream. The catalyst’s stability is also enhanced by the introduction of CO₂. In the absence of CO₂, more coke formation was observed which was in addition to the reduced conversion of propane and propylene selectivity by ∼1−5 %.

研究了 Ga、V 和 Zr 含量对 H-ZSM-5 整体催化剂负载的氧化镓、氧化钒和氧化锆在丙烷氧化脱氢 (ODHP) 中的结构性质和催化行为的影响。使用 CO ₂作为温和氧化剂的连续管式微反应器。SEM-EDX 证实了金属氧化物在印刷金属氧化物/H-ZSM-5 整体催化剂中的均匀分布 ODHP 反应在不存在 CO ₂（5 mol% 丙烷，与 N ₂平衡）和存在 CO 的情况下进行₂（2.5摩尔％的丙烷，5摩尔％的CO ₂与N-平衡₂）在500，550，600和650℃，1巴和4500空速毫升/克_猫.小时。在所有合成的 Ga、V 和 Zr/H-ZSM-5 整体催化剂中，15V-15Zr@ZSM-5 催化剂对丙烷脱氢表现出高活性和稳定性，丙烷转化率为 38%，丙烯选择性为 90%在运行 6 小时内没有任何可观察到的苯、甲苯、二甲苯 (BTX) 生成和催化剂失活趋势。CO ₂的引入也增强了催化剂的稳定性。在不存在 CO ₂的情况下，除了丙烷转化率和丙烯选择性降低约 1-5% 之外，还观察到更多的焦炭形成。