Dual-bed catalytic system comprising Al2O3 and Ba/Al2O3 with enhanced 1-octene productivity in 1-octanol dehydration for linear a-olefin production

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) pp. 376 - 385
• Main Authors: 김영은, Un Ho Jung, Dahye Song, 임효빈, Tae Ho Lee, Dong Hyun Chun, Min Hye Youn, 이기봉, 구기영
• Format: Journal Article
• Language: English
• Published: 한국공업화학회 25.03.2023
• Subjects: 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2022.11.060

To produce high-purity 1-octene, the dehydration of 1-octanol was performed over a dual-bed catalyticsystem comprising Al2O3 and Ba/Al2O3 catalysts. The influence of the catalyst weight on the activities ofAl2O3 and Ba/Al2O3 single-bed systems was initially investigated at liquid hourly space velocities (LHSVs)of 7–168 h1 at 400 C. For the Al2O3 single-bed system, the 1-octene selectivity decreased with anincrease in the catalyst weight. Although the 1-octene selectivity of Ba/Al2O3 increased owing to theanti-Saytzeff effect, its yield was limited due to a low 1-octanol conversion. The efficiency of the dualbedcatalytic system was subsequently investigated by varying the catalyst bed ratio (i.e., xAl–yBa). The 40Al-60Ba catalytic system afforded a higher conversion (95.3%) and productivity than the Ba/Al2O3 single-bed system at an LHSV of 56 h1. Moreover, the 10Al-90Ba catalytic system with a highBa/Al2O3 catalyst ratio exhibited a high 1-octene productivity at LHSVs of 7–28 h1, while also yieldinga high-purity product. The single-bed system exhibited a lower selectivity toward 1-octene than thedual-bed system, and after 100 h, the 10Al-90Ba dual-bed system offered a stable catalytic performanceregardless of the small reductions in the 1-octene selectivity and yield. KCI Citation Count: 0