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      저자 : Arun S. K. Raju (검색결과 2 건)
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        Effects of CeZrO2–Al2O3 support composition of metal-foam-coated Pd–Rh catalysts for the steam-biogas reforming reaction

        Partho Sarothi Roy,송진우,김기석,김지만,박찬성,Arun S. K. Raju 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.62 No.-

        Biogas conversion to syngas by steam reforming was studied over metal-foam-coated Pd–Rh catalysts with variable CeZrO2–Al2O3 support compositions. Catalysts with a higher CeZrO2/Al2O3 ratio exhibited greater CH4 and CO2 conversions and higher H2/CH4 yields, while displaying lower H2/CO ratios and reduced coke formation. Catalytic stability tests over 200 h showed CH4 and CO2 conversion rates of 93–97% and 0–5%, respectively. CeZrO2-modification of the catalyst leads to reduction in the BET area and metal dispersion. Sintering was observed in used catalysts; however there was no clear correlation between the extent of morphological deterioration and the CeZrO2/Al2O3 ratio of the catalyst support.

      • Effects of CeZrO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> support composition of metal-foam-coated Pd–Rh catalysts for the steam-biogas reforming reaction

        Roy, Partho Sarothi,Song, Jinwoo,Kim, Kiseok,Kim, Ji-Man,Park, Chan Seung,Raju, Arun S.K. Elsevier 2018 Journal of industrial and engineering chemistry Vol.62 No.-

        <P><B>Abstract</B></P> <P>Biogas conversion to syngas by steam reforming was studied over metal-foam-coated Pd–Rh catalysts with variable CeZrO<SUB>2</SUB>–Al<SUB>2</SUB>O<SUB>3</SUB> support compositions. Catalysts with a higher CeZrO<SUB>2</SUB>/Al<SUB>2</SUB>O<SUB>3</SUB> ratio exhibited greater CH<SUB>4</SUB> and CO<SUB>2</SUB> conversions and higher H<SUB>2</SUB>/CH<SUB>4</SUB> yields, while displaying lower H<SUB>2</SUB>/CO ratios and reduced coke formation. Catalytic stability tests over 200h showed CH<SUB>4</SUB> and CO<SUB>2</SUB> conversion rates of 93–97% and 0–5%, respectively. CeZrO<SUB>2</SUB>-modification of the catalyst leads to reduction in the BET area and metal dispersion. Sintering was observed in used catalysts; however there was no clear correlation between the extent of morphological deterioration and the CeZrO<SUB>2</SUB>/Al<SUB>2</SUB>O<SUB>3</SUB> ratio of the catalyst support.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effects of CeZrO<SUB>2</SUB>–Al<SUB>2</SUB>O<SUB>3</SUB> support composition on Pd–Rh catalyst for SBR were evaluated. </LI> <LI> CeZrO<SUB>2</SUB>-modification of the catalyst support improved CH<SUB>4</SUB> and CO<SUB>2</SUB> conversions of SBR. </LI> <LI> The variation helps to adjust H<SUB>2</SUB>/CO ratio and H<SUB>2</SUB>/CH<SUB>4</SUB> yield vital for some downstream processes. </LI> <LI> CeZrO<SUB>2</SUB> addition suppressed coke formation, for improved oxygen storage and oxide reducibility. </LI> <LI> Pd–Rh catalysts exhibit stable performance for 200h, although sintering occurred. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

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