Development of a microfluidic reaction process to control the functional expression of multiple active sites on heterogeneous catalysts

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K05208
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27020:Chemical reaction and process system engineering-related
• Research Institution: Kobe University
• Principal Investigator: Taniya Keita 神戸大学, 工学研究科, 助教 (30632822)
• Co-Investigator(Kenkyū-buntansha): 西山 覚 神戸大学, 工学研究科, 教授 (00156126) ; 市橋 祐一 神戸大学, 工学研究科, 准教授 (20362759)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: マイクロ流動層 / 固体触媒 / Baeyer-Villiger酸化 / 不均一触媒

Outline of Final Research Achievements

Several types of active sites coexist on heterogeneous catalysts, causing not only the target reaction but also side reactions to proceed simultaneously. In order to achieve a reaction operation that suppresses only side reactions while maintaining the activity of the target reaction, a micro fluidized bed reactor with cyclic fluctuation operation was studied. Beta zeolite catalysts for the Bayer-Villiger (BV) oxidation reaction were successfully fluidized by acetonitrile solvent, both in steady and periodic operations. The flow characteristics of the reactor were similar to those of a continuous stirred tank reactor. The selectivity of the target product was improved by adapting the periodic operation to BV oxidation in the micro fluidized bed reactor. These results indicate the possibility of constructing a reaction field in which side reactions are suppressed by periodic operations.

Free Research Field

触媒反応工学

Academic Significance and Societal Importance of the Research Achievements

同一触媒上に複数の活性点が存在する場合、目的反応だけでなく副反応も進行するケースが多い。従来の触媒研究では、副反応を抑制するために多元素を修飾することもあるが、目的反応の活性とトレードオフになる。本研究で得られた知見のさらなる深化は、活性の高い触媒を活用し、目的反応の活性を維持したまま副反応を抑制する反応操作技術の創出につながり、触媒プロセスの早期社会実装を可能にする。