화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.102, 103-111, October, 2021
DOI10.1016/j.jiec.2021.06.034  Export Citation
Synthesis and characterization of Pd-Ni catalysts supported on KIT-6 and their application in cyclohexane oxidation using molecular oxygen
Bahareh Reisi1, Alireza Najafi Chermahini2, †, Daily Rodríguez-Padrón3, Mario J. Munoz-Batista4, and Rafael Luque3, 5
  • 1Chemistry Group, Pardis College, Isfahan University of Technology, Isfahan 84156-83111, Iran
  • 2Department of Chemistry, Isfahan University of Technology, 84154-83111 Isfahan, Iran
  • 3Departamento de Química Orgánica, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, E14014 Cordoba, Spain
  • 4Department of Chemical Engineering, Faculty of Sciences, University of Granada, Avda. Fuentenueva, s/n 18071, Granada, Spain
  • 5Peoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russian Federation
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Bimetallic Pd-Ni catalysts were prepared via impregnation method, with effects of Pd/Ni ratio (wt%) on their catalytic performance for the oxidation of cyclohexane with molecular oxygen being investigated. Synthesized catalysts were characterized by a series of techniques including XRD, Nitrogen adsorption- desorption, H2-TPR, XPS, ICP-AES, TEM, SEM, and EDX. Compared to monometallic Pd, the addition of Ni to Pd was found to be effective in enhancing the selective oxidation of cyclohexane. Parameters such as the temperature of the reaction, reaction times, catalyst amount, initial oxygen pressure and different solvents were investigated. Optimum conditions to improve cyclohexane conversion and selectivity towards KA-oil (a mixture of cyclohexanone and cyclohexanol) over 4.0%Pd-4.0%Ni/KIT-6 catalyst included 140 °C, 1.0 MPa O2 and acetonitrile as solvent. Under these reaction conditions, 10.87 % conversion and 95.45 % selectivity for KA-oil were observed after 8 h of reaction. Reusability studies of the selected catalyst revealed an outstanding stability along four reaction cycles.
Keywords:Cyclohexane oxidation;Bimetallic Pd-Ni nanoparticles;KA oil;Molecular oxygen
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