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

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

doi:10.1016/j.apcatb.2022.121169

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

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

^*Corresponding author for this work

Electronic And Electrical Engineering

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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.

Original language	English
Article number	121169
Number of pages	13
Journal	Applied Catalysis B: Environmental
Volume	307
Early online date	15 Feb 2022
DOIs	https://doi.org/10.1016/j.apcatb.2022.121169
Publication status	Published - 15 Jun 2022

Keywords

dehydrogenation
KIT-6
liquid organic hydrogen carriers
methylcyclohexane
ordered mesoporous silica

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10.1016/j.apcatb.2022.121169Licence: CC BY-NC-ND 4.0

Ahn-etal-ACBE-2022-Dehydrogenation-of-homocyclic-liquid-organic-hydrogen-carriers-LOHCs-over-Pt-supportedFinal published version, 7 MBLicence: CC BY-NC-ND 4.0

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Ahn, C.-I., Kwak, Y., Kim, A.-R., Jang, M., Badakhsh, A., Cha, J., Kim, Y., Jo, Y. S., Jeong, H., Choi, S. H., Nam, S. W., Yoon, C. W., & Sohn, H. (2022). Dehydrogenation of homocyclic liquid organic hydrogen carriers (LOHCs) over Pt supported on an ordered pore structure of 3-D cubic mesoporous KIT-6 silica. Applied Catalysis B: Environmental, 307, Article 121169. https://doi.org/10.1016/j.apcatb.2022.121169

@article{2b9435938c18413aa234c8ec9c947b9d,

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

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.",

keywords = "dehydrogenation, KIT-6, liquid organic hydrogen carriers, methylcyclohexane, ordered mesoporous silica",

author = "Chang-Il Ahn and Yeonsu Kwak and Ah-Reum Kim and Munjeong Jang and Arash Badakhsh and Junyoung Cha and Yongmin Kim and Jo, {Young Suk} and Hyangsoo Jeong and Choi, {Sun Hee} and Nam, {Suk Woo} and Yoon, {Chang Won} and Hyuntae Sohn",

year = "2022",

month = jun,

day = "15",

doi = "10.1016/j.apcatb.2022.121169",

language = "English",

volume = "307",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

}

Ahn, C-I, Kwak, Y, Kim, A-R, Jang, M, Badakhsh, A, Cha, J, Kim, Y, Jo, YS, Jeong, H, Choi, SH, Nam, SW, Yoon, CW & Sohn, H 2022, 'Dehydrogenation of homocyclic liquid organic hydrogen carriers (LOHCs) over Pt supported on an ordered pore structure of 3-D cubic mesoporous KIT-6 silica', Applied Catalysis B: Environmental, vol. 307, 121169. https://doi.org/10.1016/j.apcatb.2022.121169

TY - JOUR

T1 - Dehydrogenation of homocyclic liquid organic hydrogen carriers (LOHCs) over Pt supported on an ordered pore structure of 3-D cubic mesoporous KIT-6 silica

AU - Ahn, Chang-Il

AU - Kwak, Yeonsu

AU - Kim, Ah-Reum

AU - Jang, Munjeong

AU - Badakhsh, Arash

AU - Cha, Junyoung

AU - Kim, Yongmin

AU - Jo, Young Suk

AU - Jeong, Hyangsoo

AU - Choi, Sun Hee

AU - Nam, Suk Woo

AU - Yoon, Chang Won

AU - Sohn, Hyuntae

PY - 2022/6/15

Y1 - 2022/6/15

N2 - 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.

AB - 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.

KW - dehydrogenation

KW - KIT-6

KW - liquid organic hydrogen carriers

KW - methylcyclohexane

KW - ordered mesoporous silica

U2 - 10.1016/j.apcatb.2022.121169

DO - 10.1016/j.apcatb.2022.121169

M3 - Article

AN - SCOPUS:85125752276

SN - 0926-3373

VL - 307

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 121169

ER -

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

Abstract

Keywords

UN SDGs

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