Recently, Yang Chaohe's group from College of Chemical Engineering made new discovery on the research of. The paper 'Au/TS-1 catalyst for propene epoxidation with H2/O2: A novel strategy to enhance stability by tuning charging sequence' has been published on AIChE Journal. it was co-finished by fengxiang, the postdoctor of the university and researchers from east china university of science and technology and norwegian university of science and technology.

For propene epoxidation with H2 and O2, the catalytic performance of Au/TS-1 catalyst is extremely sensitive to preparation parameters of deposition-precipitation (DP) method. In this work, effect of charging sequence in DP process on catalyst structure and catalytic performance of Au/TS-1 catalyst is first investigated. For different charging sequences, the compositions of Au complexes (e.g., [AuCl(OH)3]−) and pore property of TS-1 (i.e., with or without H2O prefilling micropores) could affect the transfer of Au complexes into the micropores, resulting in different Au locations and thus significantly different catalytic performance. Notably, when TS-1 is first filled with H2O and then mixed with Au complexes, the reduced Au/TS-1 catalyst could expose Au nanoparticles on the external surface of TS-1 and show high stability. The results provide direct evidence showing that micropore blocking is the deactivation mechanism. Based on the results, a simple strategy to design highly stable Au/Ti-based catalysts is developed.Learn more about the paper: http://onlinelibrary.wiley.com/wol1/doi/10.1002/aic.15313/full

AIChE Journal, issued in 1955, is one of top journals of chemical engineering and enjoys high peer-recognition. It mainly focues on the novel and significant findings on chemincal engineering and related areas.

Editor: Bu Lingduo

Source: UPC News Center