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J. Korean Ceram. Soc. > Volume 40(7); 2003 > Article
Journal of the Korean Ceramic Society 2003;40(7): 683.
doi: https://doi.org/10.4191/kcers.2003.40.7.683
수열법에 의한 Fe2O3 담지 감마알루미나 촉매제조
박병기, 이정민1, 서동수
충남대학교 재료공학과
1한국화학연구원 화학공정연구센터
Preparation of Fe2O3 Supported γ-alumina Catalyst by Hydrothermal Method
The cylindrical ${gamma}$-alumina pellets were prepared using amorphous alumina and pore generating agent. Its were immersed in aqueous solution of the mixture of Fe(NO$_3$)$_3$.9$H_2O$ and $CH_3$COOH, Fe(NO$_3$)$_3$.9$H_2O$ and $CH_3$COOH and HNO$_3$, and Fe(NO$_3$)$_3$.9$H_2O$ and HNO$_3$. The pellets thus were hydrothermally treated at 20$0^{circ}C$ for 3 h in autoclave, and were investigated morphologies and changes of crystal pore characteristics, $N_2$ adsorption and desorption isotherms, active sites and mechanical strength etc. According to the preparation method, acicular platelet pseudo-boehmite crystals of 0.1~0.3 ${mu}{textrm}{m}$ size were transformed into acicular pseudo-boehmite cristals of 0.5~2 ${mu}{textrm}{m}$ size having the same crystal structure. When ${gamma}$-alumina pellets were immersed in aqueous solution of the mixture of Fe(NO$_3$)$_3$.9$H_2O$ and $CH_3$COOH and then were hydrothermally treated, pore volume between 100 $AA$ and 1000 $AA$ was increased from 0.34 ㏄/g to 0.86 ㏄/g, and the gap of $N_2$ adsorption and desorption hysteresis loop was decreased due to increasement of pore size. New active site that could adsorb the C-H functional group was created on the catalist. Also, mechanical strength of catalyst was increased from 1.06 ㎫ to 1.36 ㎫.
Key words: Amorphous alumina, Boehmite, $\gamma$-alumina, Catalytic support, Iron oxide catalyst
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