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Alumina Support for Cobalt Catalyst in a Methane Dry Reforming Reaction: The Role of Water Content in a Solvent Medium
International Journal of Chemical Engineering ( IF 2.7 ) Pub Date : 2021-02-11 , DOI: 10.1155/2021/6681796 My Hien Thi Bach 1 , Ngoc Thang Tran 1 , Thanh Nha Thi Tran 1 , Van Cuong Nguyen 1 , Hong Anh Thi Nguyen 2
International Journal of Chemical Engineering ( IF 2.7 ) Pub Date : 2021-02-11 , DOI: 10.1155/2021/6681796 My Hien Thi Bach 1 , Ngoc Thang Tran 1 , Thanh Nha Thi Tran 1 , Van Cuong Nguyen 1 , Hong Anh Thi Nguyen 2
Affiliation
This study aimed to synthesize alumina from an inorganic aluminum nitrate precursor in various binary solvent systems of ethanol and water using the sol-gel self-assembly (SSA) method, employing a triblock copolymer, pluronic P123, as the pore-directing agent. The resulting materials were implemented as a support for the cobalt (Co) catalyst in a methane dry reforming (MDR) reaction at 1073 K under 1 atm. Regardless of the water percentage used in the support synthesis, the methane dry reforming reaction over Co catalysts on alumina supports showed the negligible change in conversion during the 12 h reaction. Moreover, there was evidence of large quantities of amorphous carbon and graphitic carbon on the spent catalyst surface. However, the low oxidation temperature of these deposited carbons could help maintain the balance between the carbon formation and the carbon elimination processes on the catalyst surface during the reforming reaction, hence prolonging the lifetime of the catalyst. The high conversion of methane (CH4) from 64.6% to 82.8% and carbon dioxide (CO2) from 70.7% to 86.6% for the MDR reaction over the as-prepared alumina-supported Co catalyst demonstrated a significant improvement in catalyst production for the MDR reaction from the viewpoint of large-scale applications.
中文翻译:
甲烷干重整反应中钴催化剂的氧化铝载体:溶剂介质中水的作用
这项研究旨在通过溶胶-凝胶自组装(SSA)方法,使用三嵌段共聚物普朗尼克P123作为孔隙导向剂,在乙醇和水的各种二元溶剂系统中从无机硝酸铝前体合成氧化铝。所得的材料被用作1703 at 1 atm的甲烷干重整(MDR)反应中钴(Co)催化剂的载体。无论在载体合成中使用的水百分比如何,在氧化铝载体上在Co催化剂上进行的甲烷干重整反应在12小时反应期间的转化率变化均可忽略不计。而且,有证据表明在废催化剂表面上有大量的无定形碳和石墨碳。然而,这些沉积的碳的低氧化温度可以帮助在重整反应期间维持碳形成与催化剂表面上的碳消除过程之间的平衡,从而延长了催化剂的寿命。甲烷(CH)的高转化率4)从制备的氧化铝负载的Co催化剂上,MDR反应的MDR反应从64.6%提高到82.8%,二氧化碳(CO 2)从70.7%达到86.6%,从以下观点来看,MDR反应的催化剂产量有了显着提高:大规模应用。
更新日期:2021-02-11
中文翻译:
甲烷干重整反应中钴催化剂的氧化铝载体:溶剂介质中水的作用
这项研究旨在通过溶胶-凝胶自组装(SSA)方法,使用三嵌段共聚物普朗尼克P123作为孔隙导向剂,在乙醇和水的各种二元溶剂系统中从无机硝酸铝前体合成氧化铝。所得的材料被用作1703 at 1 atm的甲烷干重整(MDR)反应中钴(Co)催化剂的载体。无论在载体合成中使用的水百分比如何,在氧化铝载体上在Co催化剂上进行的甲烷干重整反应在12小时反应期间的转化率变化均可忽略不计。而且,有证据表明在废催化剂表面上有大量的无定形碳和石墨碳。然而,这些沉积的碳的低氧化温度可以帮助在重整反应期间维持碳形成与催化剂表面上的碳消除过程之间的平衡,从而延长了催化剂的寿命。甲烷(CH)的高转化率4)从制备的氧化铝负载的Co催化剂上,MDR反应的MDR反应从64.6%提高到82.8%,二氧化碳(CO 2)从70.7%达到86.6%,从以下观点来看,MDR反应的催化剂产量有了显着提高:大规模应用。