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Hydrodeoxygenation of lignin-derived phenoic compounds to hydrocarbon fuel over supported Ni-based catalysts
Applied Energy ( IF 10.1 ) Pub Date : 2017-08-21 , DOI: 10.1016/j.apenergy.2017.08.078
Xinghua Zhang , Wenwu Tang , Qi Zhang , Tiejun Wang , Longlong Ma

Ni-based catalysts supported on γ-Al2O3 and SiO2 were prepared by impregnation. Catalyst characterization was performed using XRD, NH3-TPD, H2-TPR and chemisorption. Effects of supports on catalytic performance were tested using the hydrodeoxygenation (HDO) of phenolic compounds as a model reaction. Experiment result shows that single phenolic compounds can be converted via HDO reaction over Ni/SiO2 and Ni/γ-Al2O3 catalysts at 300 °C. The hydrocarbon yields are in the range of 60–90%. The effect of supports on the reaction mechanism was also explored. It is found that hydrogenation of the aromatic ring preferentially occurs over Ni/SiO2 catalyst while the cleavage of CARO bond preferentially occurs over Ni/γ-Al2O3 catalyst in the HDO of phenol. Compared to Ni/γ-Al2O3 catalyst, Ni/SiO2 catalyst exhibits better repeatability and higher catalytic activity for hydrocarbon yield when mixed phenolic compounds were used as feedstock in the HDO reaction, and the carbon deposited on the surface of Ni/SiO2 catalyst is lower.



中文翻译:

负载型镍基催化剂上木质素衍生的酚类化合物加氢脱氧为烃类燃料

Ni基催化剂负载在γ-Al系2 ö 3和SiO 2,通过化学浸渍制备。使用XRD,NH 3 -TPD,H 2 -TPR和化学吸附进行催化剂表征。使用酚类化合物的加氢脱氧(HDO)作为模型反应,测试了载体对催化性能的影响。实验结果表明,单酚类化合物可以通过HDO反应在Ni /二氧化硅被转换2和Ni /γ-Al系2 ö 3催化剂在300°C下。碳氢化合物的产率在60-90%的范围内。还探讨了载体对反应机理的影响。据发现,芳族环的氢化优先发生在Ni /二氧化硅2催化剂而C的裂解AR O键优先发生在Ni /γ-Al系2 ö 3在苯酚的HDO催化剂。与Ni相比/γ-Al系2 ö 3催化剂,镍/二氧化硅2时混合酚类化合物被用作原料的HDO反应,并沉积Ni的表面上的碳催化剂具有更好的可重复性和更高的催化活性为烃产量/ SiO 2催化剂较低。

更新日期:2017-08-21
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