Effect of ultrasound irradiation and Ni-loading on properties and performance of CeO2-doped Ni/clinoptilolite nanocatalyst used in polluted air treatment |
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| Institution: | 1. Chemical Engineering Faculty, Sahand University of Technology, PO Box 51335-1996, Sahand New Town, Tabriz, Iran;2. Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, PO Box 51335-1996, Sahand New Town, Tabriz, Iran;1. Department of Mining and Minerals Engineering, Holden Hall, Virginia Tech, 445 Old Turner ST, Blacksburg, VA 24061, United States;2. Laboratory for Interdisciplinary Statistical Analysis, Hutcheson Hall, Virginia Tech, 250 Drillfield DR, Blacksburg, VA 24061, United States;3. Department of Mining Engineering, University of Kentucky, 504 Rose ST, 230 Mining and Minerals Resources Building, Lexington, KY 40506, United States;4. Department of Chemistry, Hahn Hall, Virginia Tech, 900 West Campus DR, Blacksburg, VA 24061, United States;1. National Centre for Studies and Research on Water and Energy (CNEREE), Cadi Ayyad University, Marrakech, Morocco;2. Laboratory of Hydrobiology, Ecotoxicology and Sanitation (LHEA, URAC 33), Faculty of Sciences Semlalia, Marrakech, Morocco;1. Department of Water Resources and Environmental Management, Faculty of Agricultural Technology, Al-Balqa’ Applied University, Al-Salt 19117, Jordan;2. Royal Scientific Society, PO Box 1438, Amman 11941, Jordan |
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| Abstract: | In this research nanocatalysts containing 5, 10 and 15 wt.% of Ni, dispersed by sonication over CeO2–clinoptilolite composite support were compared toward total oxidation of toluene. Their catalytic performance at different temperatures between 150 and 350 °C was studied based on the oxidative destruction of toluene. The results indicated that the activity of Ni/CeO2–clinoptilolite nanocatalyst for toluene oxidation increased from 33 to 44% at 250 °C by employing sonochemical method in synthesis of catalyst. Meanwhile, the catalytic activity was also improved when Ni content was increased from 5 to 10 and 15 wt.%. With the aid of several characterization techniques like XRD, FESEM, PSD, EDX, BET and FTIR, the correlation between nanocatalyst structure and its activity was addressed. It is indicated that sonochemical method can lift the catalytic activity due to the better dispersion of catalyst active components and also higher surface area. Among sonicated samples, 15 wt.% Ni nanocatalyst showed the highest toluene oxidation due to the better dispersion of catalyst active components and hence to more effective catalytic sites. |
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| Keywords: | Natural zeolite Clinoptilolite Toluene Total oxidation Ultrasound |
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