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

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1 Citation (Scopus)


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
Issue number5
Publication statusPublished - 2016 May 1

Bibliographical note

Funding Information:
This work was supported by the New and Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), a granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea (20123010040010).

Publisher Copyright:
© 2015, Springer Science+Business Media Dordrecht.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)


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