Application of ZrO2-Al2O3 Aerogels to Catalysts

K. Kohama, H. Imai, H. Hirashima, H. Hamada, M. Inaba

研究成果: Article査読

11 被引用数 (Scopus)

抄録

ZrO2-Al2O3 aerogels were prepared by hydrolysis of metal alkoxides in alcoholic solutions and supercritical drying in order to obtain an improved de-NOx catalyst with high activity in a wide temperature range. The aerogels have about 20-50% higher activity than the xerogels in the range 300-600°C. The higher activity of aerogels may be attributed to the higher effective gas diffusivity in them, estimated to be about 20-60 times higher than that of the xerogels, because of their high porosity and large pore size. The catalytic activity of aerogels containing 4-10 mol% ZrO2 is more than 20% higher than that of Al2O3 aerogels at temperatures <450°C.

本文言語English
ページ(範囲)1033-1036
ページ数4
ジャーナルJournal of Sol-Gel Science and Technology
13
1-3
出版ステータスPublished - 1998 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 化学 (全般)
  • 生体材料
  • 凝縮系物理学
  • 材料化学

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