Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts

Bocanegra, Nathalia Ramírez; Rivera De la Rosa, Javier; Lucio Ortiz, Carlos J.; González, Pablo Cubillas; Greenwell, Chris; Badillo Almaráz, Verónica E.; Sandoval Rangel, Ladislao; Alcántar-Vázquez, Brenda; Rodríguez-González, Vicente; de Haro del Río, David Alejandro

Abstract

We present this study on FAU-type zeolites were prepared varying the Si/Al ratio (4, 5 and 6) and crystallization time (4, 6 and 8 h) to produce a highly pure and homogeneous material with enhanced surface area values. Bimetallic Pd-Ru and Pt-Ru (0.5 wt.% of each metal) were impregnated onto the zeolites matrix by the incipient wetness impregnation method. The materials were characterized by X-ray diffraction (XRD), nitrogen physisorption, Fourier Transform Infrared spectroscopy (FT-IR), Scattering Electronic Microscopy (SEM), Scattering and Transmission Microscopy (STEM), temperature-programmed desorption (TPD), temperature-programmed desorption (TPR) and Inductively Couples Plasma- Mass Spectrometer (ICP-MS). Results indicated that using lower Si/Al ratios favored the catalytic activity. Also, the longest crystallization time had a positive effect on surface area, homogeneous particle size distribution and crystallinity. The catalytic performance in the esterification of 5-hydroxymethylfurfural (5-HMF) to produce 5-acetoxymethylfurfural (AcMF) was investigated. The maximum 5-HMF conversion of 87.28 % was achieved using pure zeolite with relation Si/Al = 5, and 8 h of crystallization. Pd-Ru supported onto same zeolite showed a conversion of 84.22 %. The highest selectivity towards AcMF of 71.29 % with pure zeolite Si/Al = 5 and 8 h of crystallization was achieved, followed by Pd-Ru/FAU with Si/Al = 5 and 8 h of crystallization, achieving 60.42 %. Finally, results shown that the interaction between the properties of zeolitic support and the metallic species, specifically Pd, had a positive effect in the catalytic process the pristine zeolite showed improved catalytic characteristics related to its acid strength.

Citation

Bocanegra, N. R., Rivera De la Rosa, J., Lucio Ortiz, C. J., González, P. C., Greenwell, C., Badillo Almaráz, V. E., Sandoval Rangel, L., Alcántar-Vázquez, B., Rodríguez-González, V., & de Haro del Río, D. A. (2021). Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts. Catalysis Today, 360, 2-11. https://doi.org/10.1016/j.cattod.2019.11.032

• Journal Article Type: Article
• Acceptance Date: Nov 27, 2019
• Online Publication Date: Nov 28, 2019
• Publication Date: Jan 15, 2021
• Deposit Date: Nov 28, 2019
• Publicly Available Date: Nov 28, 2020
• Journal: Catalysis Today
• Print ISSN: 0920-5861
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 360
• Pages: 2-11
• DOI: https://doi.org/10.1016/j.cattod.2019.11.032
• Public URL: https://durham-repository.worktribe.com/output/1282486