Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University.
Bio-Circular-Green-Economy Technology & Engineering Center, BCGeTEC, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University.
J Oleo Sci. 2022 Jan 8;71(1):141-149. doi: 10.5650/jos.ess21264. Epub 2021 Dec 8.
The MgAlO catalyst was obtained from thermal decomposition of the MgAl-LDH catalyst having Mg/Al molar ratio of 5. The catalytic Guerbet reaction of ethanol was investigated to determine the effect of WHSV and nitrogen flow rate on butanol production and product distribution. It was performed in a fixed-bed microreactor under continuous flow of vaporized ethanol mixed with N. The MgAlO catalyst had high total basic sites and high total acid sites that were crucial for ethanol Guerbet reaction. The MgAlO catalyst showed the highest butanol selectivity at 300℃ under WHSV = 3.10 h and nitrogen flow rate = 3,600 mL/h, and the highest butanol yield at 400℃ under WHSV = 3.10 h and nitrogen flow rate = 900 mL/h. It can be summarized that in order to enhance the butanol yield, the low WHSV is preferred to increase the contact time of ethanol and catalyst under moderate temperature.
该 MgAlO 催化剂是通过热分解具有 5 的 Mg/Al 摩尔比的 MgAl-LDH 催化剂获得的。研究了乙醇的 Guerbet 催化反应，以确定 WHSV 和氮气流量对丁醇产率和产物分布的影响。在固定床微反应器中，在蒸发的乙醇与 N 的连续流动下进行反应。MgAlO 催化剂具有高的总碱性位和总酸性位，这对乙醇 Guerbet 反应至关重要。在 WHSV = 3.10 h 和氮气流量 = 3,600 mL/h 下，MgAlO 催化剂在 300℃下表现出最高的丁醇选择性，在 WHSV = 3.10 h 和氮气流量 = 900 mL/h 下，在 400℃下表现出最高的丁醇产率。可以总结出，为了提高丁醇产率，优选在中等温度下采用低 WHSV 以增加乙醇和催化剂的接触时间。
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