화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.18, No.1, 303-308, January, 2012
DOI10.1016/j.jiec.2011.11.038  Export Citation
Preparation, characterization and performance of Pd/SiO2 catalyst for benzene catalytic hydrogenation
Abdel-Ghani Boudjahem†, Afef Redjel, and Tahar Mokrane
  • Groupe Catalyse Heterogene, Laboratoire de Chimie Appliquee, Universite de Guelma, BP 401, 24000, Guelma, Algeria
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Palladium nanoparticles supported on silica were prepared by hydrazine reduction in aqueous medium at room temperature. They were characterized by XRD, TEM, EDX, H2-adsorption, and H2-TPD. The catalytic properties were evaluated in the gas-phase hydrogenation of benzene in the temperature range of 75-250 ℃ . Metal particles with a size range of 4.0-25.8 nm were obtained. The metal surface area and hydrogen storage increase with decreasing metal particle size. The H2-TPD profiles exhibited a main peak appeared at 540 ℃ with two shoulders at lower (445 ℃) and higher (605 ℃) temperatures. These peaks were ascribed to strongly adsorbed hydrogen on the surface catalyst. The catalytic activity of the catalysts strongly depends on the metal loading. It increases with decreasing Pd loading. This is ascribed to metal surface area, which increases with decreasing Pd content.
Keywords:Nanoparticles;Palladium;Hydrazine;H2-TPD;Catalytic activity
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