Oh Seung Kyo, Ku Huiji, Han Gi Bo, Jeong Byunghun, Park Young-Kwon, Jeon Jong-Ki
Department of Chemical Engineering, Kongju National University, Cheonan 31080, South Korea.
Institute for Advanced Engineering, Yongin 17180, Republic of Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):4116-4120. doi: 10.1166/jnn.2021.19188.
The objective of this study is to evaluate the catalytic performance of pellet-type Ru/γ-Al₂O₃ as a catalyst during liquid-phase hydrogenation of the aromatic hydrocarbon. The Ru/γ-Al₂O₃ catalyst was prepared using a wet impregnation method. After adding a binder to Ru/γ-Al₂O₃, a pellet-type catalyst was obtained through an extrusion method. Nanoporous structures are well developed in the pellet-type Ru/γ-Al₂O₃ catalyst. The average pore sizes of the Ru/γ-Al₂O₃ catalysts were approximately 10 nm. The catalytic performance of the pellet-type Ru/γ-Al₂O₃ catalyst during ethylbenzene hydrogenation was evaluated in a trickle-bed reactor. When the ruthenium loading increased from 1 to 5 wt%, the number of active sites effective for the hydrogenation of ethylbenzene increased proportionally. In order to maximize the conversion of ethylbenzene to ethylcyclohexane, it was necessary to maintain a liquid phase hydrogenation reaction in the trickle bed reactor. In this regards, the reaction temperature should be lower than 90 °C. The conversion of ethylbenzene to ethylcyclohexane on the Ru(5 wt%)/γ-Al₂O₃ catalyst was highest, which is ascribed to the largest number of active sites of the catalyst.
本研究的目的是评估颗粒型Ru/γ-Al₂O₃作为催化剂在芳烃液相氢化过程中的催化性能。采用湿浸渍法制备Ru/γ-Al₂O₃催化剂。在Ru/γ-Al₂O₃中加入粘结剂后，通过挤压法获得颗粒型催化剂。颗粒型Ru/γ-Al₂O₃催化剂中纳米多孔结构发育良好。Ru/γ-Al₂O₃催化剂的平均孔径约为10 nm。在滴流床反应器中评估颗粒型Ru/γ-Al₂O₃催化剂在乙苯氢化过程中的催化性能。当钌负载量从1 wt%增加到5 wt%时，对乙苯氢化有效的活性位点数量成比例增加。为了使乙苯向乙环己烷的转化率最大化，有必要在滴流床反应器中保持液相氢化反应。在这方面，反应温度应低于90℃。Ru(5 wt%)/γ-Al₂O₃催化剂上乙苯向乙环己烷的转化率最高，这归因于该催化剂活性位点数量最多。
