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Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۳، شماره ۸، صفحات ۲۹۱۸-۲۹۲۷
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عنوان انگلیسی Preparation, Characterization and Catalytic Testing over Bimetallic Pt-Pd/HZSM-5 Catalysts in NO Reduction by Propylene
چکیده انگلیسی مقاله Bi-functional and bi-metallic ZSM-5 catalysts with different noble metal mass ratios were prepared using the deposition-precipitation method and ionic exchange with NH4+. Systemic XRD, BET/BJH, STEM, and XPS spectroscopy investigations of the structural and electronic properties of these catalysts showed that 2⁓3-nm Pt and Pd metallic nanoparticles were highly dispersed over the ZSM-5 support, with strong interactions between Platinum and Palladium, and a good distribution of the acid sites on the surface of the catalysts which have been observed using the FTIR method by adsorption of pyridine. Considering optimized values of NO/C3H6 ratio=1 and GHSV= 22000 h-1, some parameters, acidity, temperature, surface morphology, and catalytic activity performance of Pd-Pt/HZSM-5 zeolites were investigated in the selective catalytic reduction of NO by C3H6, Pd-Pt/HZSM-5 bi-functional catalysts exhibited improved catalytic properties relative to their monometallic counterparts. The results show that the active components are uniformly dispersed and distribute well in the micro-porous support. For the Pt0.6Pd0.4/HZSM-5 catalyst, the maximum conversion of NO to N2 approached 63% at 450 ºC with 100% N2 selectivity. By contrast, for
the 1%Pt/HZSM-5 catalyst, the maximum NO conversion to N2 reached 52% at 450 ºC and only 42% for 1%Pt/HZSM-5. The Pt0.6Pd0.4/ZSM-5 catalyst also exhibited high durability and catalytic activity at high reaction temperatures.
کلیدواژه‌های انگلیسی مقاله HZSM-5 catalyst,bimetallic Pt-Pd,NO reduction,C3H6-SCR,Catalytic activity
نویسندگان مقاله Mounir Sakmeche |
Laboratory of Catalytic Materials and Industrial Processes (LMPCI) Department of Hydrocarbos and Renewable Energies, Faculty of Science and Technology. University of Adrar, National Highway No. 06. Adrar 01000, ALGERIA

Elfahem Sakher |
Department of Chemistry, Faculty of Science and Technology, University of Adrar, National Highway No. 06. Adrar 01000, ALGERIA

Billel Smili |
Laboratory of Catalytic Materials and Industrial Processes (LMPCI) Department of Hydrocarbons and Renewable Energies, Faculty of Science and Technology. University of Adrar, National Highway No. 06. Adrar 01000, ALGERIA

Mohamed El Amine Dahou |
Laboratory of Catalytic Materials and Industrial Processes (LMPCI) Department of Hydrocarbons and Renewable Energies, Faculty of Science and Technology. University of Adrar, National Highway No. 06. Adrar 01000, ALGERIA

Ahmed Belhakem |
Department of Chemistry, University of Mostaganem, B.P 1001, 27000 Mostaganem, ALGERIA

Leila Belgacem |
Research Center in Industrial Technologies CRTI, Cheraga 16014, Algiers, ALGERIA

Mohammed Messaoudi |
Department of Biological Sciences, Faculty of Natural and Life Sciences, University of Adrar, ALGERIA

Samira Benhara |
Research Center in Industrial Technologies CRTI, Cheraga 16014, Algiers, ALGERIA

نشانی اینترنتی https://ijcce.ac.ir/article_712116_7e79d1732e7f347b9d5dea13acd40a31.pdf
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