کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610172 | 47163 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization and catalytic performance of a bimetallic Pt-Sn/HZSM-5 catalyst used in denitratation of drinking water
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Removal of nitrates and nitrites from drinking water by catalytic hydrogenation over zeolite-supported Pt-Sn catalysts was studied. Bimetallic Pt-Sn/HZSM-5 catalysts were characterized by temperature-programmed reduction (TPR), H2 chemisorption, X-ray photoelectron spectroscopy (XPS) and 119Sn Mössbauer spectroscopy. The characterization techniques showed a significant decrease in the H/Pt ratio upon tin addition, tin surface enrichment, the formation of PtSn alloys and platinum catalysis of the tin reduction. The Pt-Sn/HZSM-5 catalyst clearly showed high catalytic activity for the reduction of nitrate to form N2. In the bimetallic catalyst, the role of tin is to reduce nitrate or nitrite according to a redox process, while the platinum maintains tin in the metallic state.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 100-105
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 100-105
نویسندگان
Rafael RodrÃguez, Carolina Pfaff, Luis Melo, Paulino Betancourt,