Steam reforming of ethanol over K promoted Co catalyst

Shuhei Ogo, Takuya Shimizu, Yusaku Nakazawa, Kei Mukawa, Daiki Mukai, Yasushi Sekine*

*この研究の対応する著者

研究成果: Article査読

34 被引用数 (Scopus)

抄録

We investigated the catalytic activity of Co/K/α-Al2O3 with various potassium (K) loadings for ethanol steam reforming. The promotion effect of K loading and the role of K in Co/K/α-Al2O3 were investigated using TEM-EDX, H2-TPR, XAFS, XPS, and IR measurements. Results show that loading of 1-2 wt% K on Co/α-Al2O3 was effective for improving catalytic activity, selectivity to hydrogen and suppressing by-product (CH4, C2H4, and coke) formations. Measurements by H2-TPR and XAFS showed that the reducibility of the supported Co species decreased by K loading. TEM measurements revealed that the Co0-CoO core-shell structure was formed over Co/K/α-Al2O3 during ethanol steam reforming at 823 K, suggesting that the oxidized Co species (CoO) is a highly active species in ethanol steam reforming. In situ IR measurements revealed that the adsorbed ethanol forms stable acetate species by K loading, which improves hydrogen selectivity.

本文言語English
ページ(範囲)30-38
ページ数9
ジャーナルApplied Catalysis A: General
495
DOI
出版ステータスPublished - 2015 4月 5

ASJC Scopus subject areas

  • 触媒
  • プロセス化学およびプロセス工学

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