caa a22 4500 606174249 CHVBK 20210128100737.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s11244-015-0363-3 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0363-3 Active Sites in Ni2P/USY Catalysts for the Hydrodeoxygenation of 2-Methyltetrahydrofuran [Elektronische Daten] [Ara Cho, Atsushi Takagaki, Ryuji Kikuchi, S. Ted Oyama] A series of nickel phosphide catalysts supported on ultrastable Y zeolites USY (Si/Al=40) with microporous/mesoporous structure were prepared by impregnation and temperature-programmed reduction and were studied for the hydrodeoxygenation (HDO) of 2-methyltetrahydrofuran (2-MTHF). The loading of the active phase was varied from 0.58, 1.16, and 1.74 to 2.3mmol (gsupport)−1 and the corresponding samples were denoted as 0.5, 1.0, 1.5, and 2.0 Ni2P/USY. The two lowest loading supports did not show X-ray diffraction (XRD) lines, but X-ray absorption fine-structure spectroscopy (XAFS) indicated the formation of a Ni2P phase, with low Ni-Ni coordination, consistent with high dispersion. The two highest loading supports showed XRD patterns typical of Ni2P, and XAFS indicated similar bond distances to bulk Ni2P and high Ni-Ni coordination. Furthermore, the XAFS data indicated that the low-loading samples had shorter bond distances and more Ni in square-pyramidal coordination compared to the high loading samples and the reference Ni2P material, suggesting that there were differences in structural properties in the samples. This likely was due to preferred termination of the small crystallites with pyramidal Ni sites. The HDO of 2-MTHF was studied at 0.5MPa and 513-593K and the main products were n-pentane and n-butane for all catalysts. The low-loading samples showed higher turnover frequency (based on sites titrated by CO chemisorption), and this was attributed to the higher intrinsic activity of the pyramidal Ni sites. In addition, the low-loading samples showed higher selectivity to n-pentane, and this was attributed to lower C-C hydrogenolysis type reactions, which are favored by metallic ensembles as found in the high-loading samples. Springer Science+Business Media New York, 2015 Hydrodeoxygenation nationallicence 2-methyltetrahydrofuran nationallicence Ni2P nationallicence USY support nationallicence Cho Ara Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut Takagaki Atsushi Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut Kikuchi Ryuji Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut Ted Oyama S. Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/4-6(2015-04-01), 219-231 1022-5528 58:4-6<219 2015 58 11244 https://doi.org/10.1007/s11244-015-0363-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0363-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cho Ara Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut NATIONALLICENCE 700 1- Takagaki Atsushi Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut NATIONALLICENCE 700 1- Kikuchi Ryuji Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut NATIONALLICENCE 700 1- Ted Oyama S. Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Tokyo, Japan aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/4-6(2015-04-01), 219-231 1022-5528 58:4-6<219 2015 58 11244