Dehydrogenation of homocyclic liquid organic hydrogen carriers (LOHCs) over Pt supported on an ordered pore structure of 3-D cubic mesoporous KIT-6 silica

Choi, Sun Hee ¹Nam, Suk Woo ¹Yoon, Chang Won ²Sohn, Hyuntae ¹Ahn, Chang-Il ¹Kwak, Yeonsu ¹Kim, Ah-Reum ¹Jang, Munjeong ¹Badakhsh, Arash ¹Cha, Junyoung ¹Kim, Yongmin ¹Jo, Young Suk ¹Jeong, Hyangsoo¹

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作者信息

1. Korea Inst Sci & Technol KIST
2. Pohang Univ Sci & Technol POSTECH
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Abstract

Pt supported on ordered mesoporous silica (KIT-6) catalyst was examined for the dehydrogenation of homocyclic liquid organic hydrogen carriers (LOHCs, 1: MCH, 2: hydrogenated biphenyl-based eutectic mixture (H-BPDM)) conditions. The longer pore-residence time of the MCH molecules in the 3D bicontinuous pore structure of the Pt/ KIT-6 catalyst strongly affected the catalytic activity because a higher MCH concentration was achieved in the vicinity of the Pt active sites. Pt/KIT-6 catalyst exhibited a higher surface area, pore volume, and Pt dispersion with narrower particle size distribution (average Pt particle size: -1.3 nm). Therefore, higher LOHC conversion with faster hydrogen production occurred, with a higher hydrogen selectivity over Pt/KIT-6 compared with Pt/ SiO2 and Pt/Al2O3. Long-term experiment results indicated that the Pt/KIT-6 catalytic activity was stable over the reaction time than that of the other catalysts. No significant structural collapse occurred in KIT-6 during the dehydrogenation. Carbon coking was observed for all three samples.

Key words

Methylcyclohexane/Liquid organic hydrogen carriers/Dehydrogenation/KIT-6/Ordered mesoporous silica/DODECAHYDRO-N-ETHYLCARBAZOLE/CATALYTIC DEHYDROGENATION/SELECTIVE OXIDATION/SBA-15 SYNTHESIS/METHYLCYCLOHEXANE/PLATINUM/STORAGE/RELEASE/SIZE/PERFORMANCE

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量15

参考文献量78

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