Preprint Article Version 1 This version is not peer-reviewed

Study of Catalytic Hydrodeoxygenation Performances of Ni/KIT-6 Catalyst-Effect of Reduction Temperature

Version 1 : Received: 23 August 2019 / Approved: 26 August 2019 / Online: 26 August 2019 (12:34:43 CEST)

How to cite: Zhang, X.; Chen, S.; Wang, F.; Deng, L.; Ren, J.; Jiao, Z.; Zhou, G. Study of Catalytic Hydrodeoxygenation Performances of Ni/KIT-6 Catalyst-Effect of Reduction Temperature. Preprints 2019, 2019080265 (doi: 10.20944/preprints201908.0265.v1). Zhang, X.; Chen, S.; Wang, F.; Deng, L.; Ren, J.; Jiao, Z.; Zhou, G. Study of Catalytic Hydrodeoxygenation Performances of Ni/KIT-6 Catalyst-Effect of Reduction Temperature. Preprints 2019, 2019080265 (doi: 10.20944/preprints201908.0265.v1).

Abstract

A series of Ni/KIT6 catalystprecusors with 25wt.%Ni loading amount were reduced in H2 at 400, 450, 500, and 550ºC, respectively. The studied catalysts were investigated by XRD, Quasiin-situ XPS, BET, TEM, and H2-TPDanalysis methods.It was found that reduction temperature is an important factor affecting the hydrodeoxygenation (HDO) performance of the studied catalysts. The reduction temperature influences mainly the content of active components, crystal size, and the abilityfor adsorbing and activatingH2. The developed pore structure and large specific surface area of the KIT-6 support favored the Ni dispersion.The RT450 catalyst, which was prepared in H2 atmosphere at 450 ºC, has the best HDO performance. Ethyl acetate can be completely transformed, and maintain 96.8% ethane selectivity and 3.2% methane selectivity at 300 ºC. The calculated apparent activation energies of the prepared catalysts increased in the following order: RT550 > RT400 > RT500 > RT450.

Subject Areas

Mesoporous Ni/KIT-6 catalyst; Active Ni species; Catalytic hydrodeoxygenation; Biodiesel

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