Cerium Oxide Catalyzes the Selective Vapor-Phase Hydrodeoxygenation of Anisole to Benzene at Ambient Pressures of Hydrogen
Cerium Oxide Catalyzes the Selective Vapor-Phase Hydrodeoxygenation of Anisole to Benzene at Ambient Pressures of Hydrogen
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DOI：
10.1021/acs.iecr.9b01987
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发表时间：
2019-07
影响因子：
4.2
通讯作者：
S. Afrin;Praveen Bollini
中科院分区：
文献类型：
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作者：
S. Afrin;Praveen Bollini
在698 K和环境压力下的苯甲醚加氢脱氧数据表明，氧化铈是一种氢效率高的催化剂，其选择性地裂解碳-氧键而不氢化芳烃。苯酚和苯是观察到的唯一主要产物，在转化率大于7.7%（698 K，102 kPa H2，0.07 kPa苯甲醚，0.008-0.042 ganisole gcat-1 h-1）时，苯摩尔选择性超过85%。该催化剂在92小时的运行过程中表现出小于17%的转化率损失，并且在773 K下在空气中再生使转化率水平返回到对应于新鲜催化剂的水平。苯选择性在苯甲醚转化率的恒定值下随氢气压力单调增加，表明使用氢气压力（除了苯甲醚转化率之外）作为调节苯选择性的杠杆的潜力。总的来说，氧化铈代表了一种廉价的，高选择性的，稳定的，可再生的，可调的，氢效率高的催化剂，可以加氢脱氢生物质衍生的模型氧...
Anisole hydrodeoxygenation data at 698 K and ambient pressures indicate that cerium oxide is a hydrogen-efficient catalyst that selectively cleaves carbon–oxygen bonds without hydrogenating aromatics. Phenol and benzene are the only major products observed, with benzene molar selectivity exceeding 85% at conversions greater than 7.7% (698 K, 102 kPa H2, 0.07 kPa anisole, 0.008–0.042 ganisole gcat–1 h–1). The catalyst exhibits less than 17% loss in conversion over the course of a 92-h run, and regeneration in air at 773 K returns conversion levels to that corresponding to the fresh catalyst. Benzene selectivity increases monotonically with hydrogen pressure at constant values of anisole conversion, demonstrating the potential for using hydrogen pressure (in addition to anisole conversion) as a lever to tune benzene selectivity. Overall, cerium oxide represents an inexpensive, highly selective, stable, regenerable, tunable, hydrogen-efficient catalyst that can hydrodeoxygenate biomass-derived model oxygenat...