Production of linear Α-olefin 1-octene via dehydration of 1-octanol over Al2O3 catalyst

Young eun Kim; Hyo Been Im; Un Ho Jung; Ji Chan Park; Min Hye Youn; Heon Do Jeong; Dong Wook Lee; Geun Bae Rhim; Dong Hyun Chun; Ki Bong Lee; Kee Young Koo

doi:10.1016/j.fuel.2019.115957

Production of linear Α-olefin 1-octene via dehydration of 1-octanol over Al₂O₃ catalyst

Young eun Kim, Hyo Been Im, Un Ho Jung, Ji Chan Park, Min Hye Youn, Heon Do Jeong, Dong Wook Lee, Geun Bae Rhim, Dong Hyun Chun, Ki Bong Lee, Kee Young Koo

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

The linear α-olefin 1-octene was produced via the dehydration of 1-octanol over Al₂O₃ catalysts. The effect of calcination temperature on the characteristics of an Al₂O₃ catalyst and its activity in the dehydration of 1-octanol to 1-octene was investigated. Al₂O₃ catalysts calcined at various temperatures (250, 500, 750, 1000 °C) were evaluated at 300–400 °C with a liquid hourly space velocity (LHSV) of 7–56 h⁻¹. XRD, BET, ²⁷Al-NMR, Py-FTIR, and NH₃-TPD analyses indicated that the calcination temperature affected the crystal phase, surface area, occupancy of the coordinated Al³⁺ ion, and acidic properties of Al₂O₃ catalysts. Upon calcination at temperatures >750 °C, the surface area of Al₂O₃ catalysts reduced due to γ-Al₂O₃ to θ-Al₂O₃ phase transition. The changes in the crystal phase decreased the surface area, which correlated to the acidity of the Al₂O₃ catalyst. The distribution of unsaturated Al³⁺ ions acting as LAS on the catalyst surface increased with increasing calcination temperature, but decreased above 750 °C calcination temperature due to the diminishing surface area. The Al₂O₃ catalyst calcined at 500 °C showed the highest 1-octanol conversion in the dehydration of 1-octanol. High 1-octene selectivity was maintained while the isomer ratio decreased at a high LHSV of 56 h⁻¹.

Original language	English
Article number	115957
Journal	Fuel
Volume	256
DOIs	https://doi.org/10.1016/j.fuel.2019.115957
Publication status	Published - 2019 Nov 15

Bibliographical note

Funding Information:
This work was conducted under the framework of research and development program of the Korea Institute of Energy Research ( KIER ) ( B9-2442-02 ).

Funding Information:
This work was conducted under the framework of research and development program of the Korea Institute of Energy Research (KIER) (B9-2442-02).

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

1-octanol
1-octene
AlO catalyst
Alcohol dehydration
Linear α-olefin

ASJC Scopus subject areas

General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology
Organic Chemistry

Access to Document

10.1016/j.fuel.2019.115957

Cite this

@article{9898e32b00be4549a740e32c75e60f90,

title = "Production of linear Α-olefin 1-octene via dehydration of 1-octanol over Al2O3 catalyst",

abstract = "The linear α-olefin 1-octene was produced via the dehydration of 1-octanol over Al2O3 catalysts. The effect of calcination temperature on the characteristics of an Al2O3 catalyst and its activity in the dehydration of 1-octanol to 1-octene was investigated. Al2O3 catalysts calcined at various temperatures (250, 500, 750, 1000 °C) were evaluated at 300–400 °C with a liquid hourly space velocity (LHSV) of 7–56 h−1. XRD, BET, 27Al-NMR, Py-FTIR, and NH3-TPD analyses indicated that the calcination temperature affected the crystal phase, surface area, occupancy of the coordinated Al3+ ion, and acidic properties of Al2O3 catalysts. Upon calcination at temperatures >750 °C, the surface area of Al2O3 catalysts reduced due to γ-Al2O3 to θ-Al2O3 phase transition. The changes in the crystal phase decreased the surface area, which correlated to the acidity of the Al2O3 catalyst. The distribution of unsaturated Al3+ ions acting as LAS on the catalyst surface increased with increasing calcination temperature, but decreased above 750 °C calcination temperature due to the diminishing surface area. The Al2O3 catalyst calcined at 500 °C showed the highest 1-octanol conversion in the dehydration of 1-octanol. High 1-octene selectivity was maintained while the isomer ratio decreased at a high LHSV of 56 h−1.",

keywords = "1-octanol, 1-octene, AlO catalyst, Alcohol dehydration, Linear α-olefin",

author = "Kim, {Young eun} and Im, {Hyo Been} and Jung, {Un Ho} and Park, {Ji Chan} and Youn, {Min Hye} and Jeong, {Heon Do} and Lee, {Dong Wook} and Rhim, {Geun Bae} and Chun, {Dong Hyun} and Lee, {Ki Bong} and Koo, {Kee Young}",

note = "Funding Information: This work was conducted under the framework of research and development program of the Korea Institute of Energy Research ( KIER ) ( B9-2442-02 ). Funding Information: This work was conducted under the framework of research and development program of the Korea Institute of Energy Research (KIER) (B9-2442-02). Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = nov,

day = "15",

doi = "10.1016/j.fuel.2019.115957",

language = "English",

volume = "256",

journal = "Fuel",

issn = "0016-2361",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Production of linear Α-olefin 1-octene via dehydration of 1-octanol over Al2O3 catalyst

AU - Kim, Young eun

AU - Im, Hyo Been

AU - Jung, Un Ho

AU - Park, Ji Chan

AU - Youn, Min Hye

AU - Jeong, Heon Do

AU - Lee, Dong Wook

AU - Rhim, Geun Bae

AU - Chun, Dong Hyun

AU - Lee, Ki Bong

AU - Koo, Kee Young

N1 - Funding Information: This work was conducted under the framework of research and development program of the Korea Institute of Energy Research ( KIER ) ( B9-2442-02 ). Funding Information: This work was conducted under the framework of research and development program of the Korea Institute of Energy Research (KIER) (B9-2442-02). Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/11/15

Y1 - 2019/11/15

N2 - The linear α-olefin 1-octene was produced via the dehydration of 1-octanol over Al2O3 catalysts. The effect of calcination temperature on the characteristics of an Al2O3 catalyst and its activity in the dehydration of 1-octanol to 1-octene was investigated. Al2O3 catalysts calcined at various temperatures (250, 500, 750, 1000 °C) were evaluated at 300–400 °C with a liquid hourly space velocity (LHSV) of 7–56 h−1. XRD, BET, 27Al-NMR, Py-FTIR, and NH3-TPD analyses indicated that the calcination temperature affected the crystal phase, surface area, occupancy of the coordinated Al3+ ion, and acidic properties of Al2O3 catalysts. Upon calcination at temperatures >750 °C, the surface area of Al2O3 catalysts reduced due to γ-Al2O3 to θ-Al2O3 phase transition. The changes in the crystal phase decreased the surface area, which correlated to the acidity of the Al2O3 catalyst. The distribution of unsaturated Al3+ ions acting as LAS on the catalyst surface increased with increasing calcination temperature, but decreased above 750 °C calcination temperature due to the diminishing surface area. The Al2O3 catalyst calcined at 500 °C showed the highest 1-octanol conversion in the dehydration of 1-octanol. High 1-octene selectivity was maintained while the isomer ratio decreased at a high LHSV of 56 h−1.

AB - The linear α-olefin 1-octene was produced via the dehydration of 1-octanol over Al2O3 catalysts. The effect of calcination temperature on the characteristics of an Al2O3 catalyst and its activity in the dehydration of 1-octanol to 1-octene was investigated. Al2O3 catalysts calcined at various temperatures (250, 500, 750, 1000 °C) were evaluated at 300–400 °C with a liquid hourly space velocity (LHSV) of 7–56 h−1. XRD, BET, 27Al-NMR, Py-FTIR, and NH3-TPD analyses indicated that the calcination temperature affected the crystal phase, surface area, occupancy of the coordinated Al3+ ion, and acidic properties of Al2O3 catalysts. Upon calcination at temperatures >750 °C, the surface area of Al2O3 catalysts reduced due to γ-Al2O3 to θ-Al2O3 phase transition. The changes in the crystal phase decreased the surface area, which correlated to the acidity of the Al2O3 catalyst. The distribution of unsaturated Al3+ ions acting as LAS on the catalyst surface increased with increasing calcination temperature, but decreased above 750 °C calcination temperature due to the diminishing surface area. The Al2O3 catalyst calcined at 500 °C showed the highest 1-octanol conversion in the dehydration of 1-octanol. High 1-octene selectivity was maintained while the isomer ratio decreased at a high LHSV of 56 h−1.

KW - 1-octanol

KW - 1-octene

KW - AlO catalyst

KW - Alcohol dehydration

KW - Linear α-olefin

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DO - 10.1016/j.fuel.2019.115957

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