Pre-reforming of n-tetradecane over Ni/MgO–Al2O3 catalyst: effect of added potassium on the coke resistance

Sung hun Lee, Kee Young Koo, Un Ho Jung, Yong Gun Shul, Wang Lai Yoon

Research output: Contribution to journalArticle

Abstract

We investigated the pre-reforming of n-tetradecane (C14H30) over the K-promoted 50 wt% Ni/MgO–Al2O3 catalyst and also analysed the coke resistance. The 50 wt% Ni/MgO–Al2O3 catalysts were prepared by the deposition–precipitation method and 1–5 wt% of potassium was added to the catalyst using the impregnation method. The catalysts were characterized by ICP, XRD, H2-chemisorption, H2-TPR, and BET. The pre-reforming of n-tetradecane was performed under the reaction conditions of S/C = 4.0, GHSV = 3000 h−1, and 400–450 °C. The Ni crystallite size increased, whereas the Ni dispersion and surface area of catalysts decreased with increasing amounts of K. The 50 wt% Ni/MgO–Al2O3 showed large amounts of coke deposition compared to the K-promoted catalysts. It was found that the K addition over 50 wt% Ni/MgO–Al2O3 catalyst was beneficial for coke removal by promoting the coke gasification. A 1 wt%K/50 wt% Ni/MgO–Al2O3 catalyst showed stable activity during pre-reforming at S/C = 4.0, GHSV = 3000 h−1, and 400 °C. Furthermore, it had the lowest amount of surface coke, as observed by SEM, TEM, and TG analysis.

Original languageEnglish
Pages (from-to)4317-4332
Number of pages16
JournalResearch on Chemical Intermediates
Volume42
Issue number5
DOIs
Publication statusPublished - 2016 May 1

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Reforming reactions
Coke
Potassium
Catalysts
n-tetradecane
Crystallite size
Chemisorption
Gasification
Impregnation
Transmission electron microscopy
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Lee, Sung hun ; Koo, Kee Young ; Jung, Un Ho ; Shul, Yong Gun ; Yoon, Wang Lai. / Pre-reforming of n-tetradecane over Ni/MgO–Al2O3 catalyst : effect of added potassium on the coke resistance. In: Research on Chemical Intermediates. 2016 ; Vol. 42, No. 5. pp. 4317-4332.
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abstract = "We investigated the pre-reforming of n-tetradecane (C14H30) over the K-promoted 50 wt{\%} Ni/MgO–Al2O3 catalyst and also analysed the coke resistance. The 50 wt{\%} Ni/MgO–Al2O3 catalysts were prepared by the deposition–precipitation method and 1–5 wt{\%} of potassium was added to the catalyst using the impregnation method. The catalysts were characterized by ICP, XRD, H2-chemisorption, H2-TPR, and BET. The pre-reforming of n-tetradecane was performed under the reaction conditions of S/C = 4.0, GHSV = 3000 h−1, and 400–450 °C. The Ni crystallite size increased, whereas the Ni dispersion and surface area of catalysts decreased with increasing amounts of K. The 50 wt{\%} Ni/MgO–Al2O3 showed large amounts of coke deposition compared to the K-promoted catalysts. It was found that the K addition over 50 wt{\%} Ni/MgO–Al2O3 catalyst was beneficial for coke removal by promoting the coke gasification. A 1 wt{\%}K/50 wt{\%} Ni/MgO–Al2O3 catalyst showed stable activity during pre-reforming at S/C = 4.0, GHSV = 3000 h−1, and 400 °C. Furthermore, it had the lowest amount of surface coke, as observed by SEM, TEM, and TG analysis.",
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Pre-reforming of n-tetradecane over Ni/MgO–Al2O3 catalyst : effect of added potassium on the coke resistance. / Lee, Sung hun; Koo, Kee Young; Jung, Un Ho; Shul, Yong Gun; Yoon, Wang Lai.

In: Research on Chemical Intermediates, Vol. 42, No. 5, 01.05.2016, p. 4317-4332.

Research output: Contribution to journalArticle

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T1 - Pre-reforming of n-tetradecane over Ni/MgO–Al2O3 catalyst

T2 - effect of added potassium on the coke resistance

AU - Lee, Sung hun

AU - Koo, Kee Young

AU - Jung, Un Ho

AU - Shul, Yong Gun

AU - Yoon, Wang Lai

PY - 2016/5/1

Y1 - 2016/5/1

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