Abstract Hydrogen donors were employed to replace pure hydrogen as a hydrogen source for in-situ gas phase HDO due to their low storage and transportation cost. A series of catalysts have been prepared by modifying the zeolite HZSM-5 with polymetallic and multi-carriers. Gas-phase hydrodeoxygenation (HDO) of guaiacol was conducted under a pressure 2 MPa and a temperature at 350 °C. The effect of polymetallic and multi-carrier modification on HDO activity was investigated. The physicochemical properties of catalysts were characterized by BET, XRD, SEM, H2-TPR, XPS and NH3-TPD. The characterization results showed that when La was loaded, the catalyst Ni/HZSM-5&La obtained a stronger medium-strong acidity. The electronic transfer of the elemental nickel was promoted. After HDO, the catalyst Ni/HZSM-5&La exhibited the highest HDO rate and BTX selectivity, reaching 97.79% and 34.25%, respectively. The real bio-oil HDO under a hydrogen donor were also analyzed. The results showed the content of the hydrocarbon compound were over 95%. The reaction mechanism was discussed through the distribution of liquid product species. Direct demethoxylation pathway (DMO) and methylation pathway (ME) were considered as the main pathways.

中文翻译：

---

苯、甲苯和二甲苯 (BTX) 在双功能非贵金属沸石催化剂上原位气相加氢脱氧愈创木酚与液氢供体

摘要 氢供体因其较低的储存和运输成本而被用来代替纯氢作为原位气相HDO的氢源。用多金属和多载体对沸石HZSM-5进行改性制备了一系列催化剂。愈创木酚的气相加氢脱氧 (HDO) 在压力 2 MPa 和温度 350 °C 下进行。研究了多金属和多载体修饰对HDO活性的影响。通过BET、XRD、SEM、H2-TPR、XPS和NH3-TPD对催化剂的理化性质进行了表征。表征结果表明，负载La时，催化剂Ni/HZSM-5&La获得了较强的中强酸性。促进了元素镍的电子转移。HDO后催化剂Ni/HZSM-5& La 表现出最高的 HDO 率和 BTX 选择性，分别达到 97.79% 和 34.25%。还分析了氢供体下的真实生物油 HDO。结果表明烃类化合物的含量在95%以上。通过液体产物种类的分布讨论了反应机理。直接去甲氧基化途径（DMO）和甲基化途径（ME）被认为是主要途径。