Abstract Catalytic upgrading of anisole and guaiacol in an atmospheric dielectric barrier discharge (DBD) plasma reactor was studied. Compared to thermal upgrading in a fixed bed, the DBD plasma method can convert the model compound to benzene and toluene with high selectivity under relatively low temperature. The synergistic effect between H2 plasma and Ni-Mo/SiO2 catalyst is crucial to the high deoxygenation rate. The primary reactions occurring during the DBD upgrading process include demethylation, methyl transfer, and hydrogenolysis. XRD spectra indicate that phase change should not be the primary reason for catalyst deactivation; GC–MS, NH3-TPD, and regeneration experiments show that carbon deposition is the cause for deactivation. NH3-TPD analysis reveals that a combination of medium and strong acid sites plays an important role in the hydrogenolysis of phenols to benzenes. The present work shows DBD catalytic upgrading as a promising route for the C O bond hydrogenolysis reaction.

中文翻译：

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催化介质阻挡放电等离子体反应器中木质素热解油模型化合物的升级

摘要 研究了大气介质阻挡放电（DBD）等离子体反应器中苯甲醚和愈创木酚的催化升级。与固定床中的热提质相比，DBD 等离子体方法可以在相对较低的温度下以高选择性将模型化合物转化为苯和甲苯。H2 等离子体和 Ni-Mo/SiO2 催化剂之间的协同效应对高脱氧率至关重要。DBD 升级过程中发生的主要反应包括去甲基化、甲基转移和氢解。XRD 谱表明相变不应是催化剂失活的主要原因；GC-MS、NH3-TPD 和再生实验表明碳沉积是失活的原因。NH3-TPD 分析表明，中强酸位的组合在苯酚氢解为苯的过程中起着重要作用。目前的工作表明 DBD 催化升级是 CO 键氢解反应的一条有前途的途径。