Levulinic acid is an ideal model compound for complex oxygenated components in bio-oil. To assist the understanding of its hydrodeoxygenation (HDO) performance, it is necessary to investigate separately the HDO property of the ketonic carbonyl group and carboxyl group. Herein, 2-pentanone was selected as a model to study the HDO property of the ketonic carbonyl group. The Ru/HZSM-5 catalyst was prepared by an excessive impregnation method and its structure and acidity were characterized by H₂–TPR, NH₃–TPD, HRTEM, SEAD, Py-IR, TG-DSC, and ICP analyses. The effect of preparation conditions on the catalytic performance of Ru/HZSM-5 was studied; the suitable preparation conditions were determined as follows: a calcination temperature of 450 °C, a calcination time of 3 h, a reduction temperature of 350 °C, and a reduction time of 4 h. The catalytic performance of Ru/HZSM-5 for the 2-pentanone HDO reaction was evaluated; pentane selectivity of 77.7% at a 2-pentanone conversion of 91.8% was achieved under the conditions of a reaction pressure of 5 MPa, a reaction temperature of 190 °C, a catalyst amount of 6 wt% and a reaction time of 6 h. 2-Pentanone HDO follows the reaction path of 2-pentanone hydrogenation to 2-pentanol and then 2-pentanol dehydration and hydrogenation to the target product pentane. The acidity of the catalyst plays a certain role in influencing its catalytic performance: Lewis acid sites show high activity for activating CO bonds and Brønsted acid sites are the key to accelerate the further dehydration of 2-pentanol and hydrogenation to alkanes.

中文翻译：

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Ru/HZSM-5催化剂的制备及其对2-戊酮加氢脱氧反应的催化性能

乙酰丙酸是生物油中复杂含氧成分的理想模型化合物。为了帮助理解其加氢脱氧 (HDO) 性能，有必要分别研究酮羰基和羧基的 HDO 性能。在此，选择 2-戊酮作为模型来研究酮羰基的 HDO 性质。Ru/HZSM-5催化剂采用过量浸渍法制备，其结构和酸度通过H ₂ -TPR、NH ₃表征–TPD、HRTEM、SEAD、Py-IR、TG-DSC 和 ICP 分析。研究了制备条件对Ru/HZSM-5催化性能的影响；适宜的制备条件确定为：煅烧温度450℃，煅烧时间3h，还原温度350℃，还原时间4h。评价了Ru/HZSM-5对2-戊酮HDO反应的催化性能；在反应压力5MPa、反应温度190℃、催化剂用量6wt%、反应时间6h的条件下，戊烷选择性为77.7%，2-戊酮转化率为91.8%。2-戊酮HDO遵循2-戊酮加氢生成2-戊醇，然后2-戊醇脱水加氢生成目标产物戊烷的反应路径。O 键和布朗斯台德酸位是加速 2-戊醇进一步脱水和加氢生成烷烃的关键。