کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
56309 | 47081 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Specific tuning of acid/base sites in apatite materials to enhance their methanol thiolation catalytic performances
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
Calcium hydroxyapatites (Hap) solids were prepared with various Ca/P atomic ratios, leading to stoichiometric Ca10(PO4)6(OH)2, calcium-deficient (Ca/P < 1.67) and calcium-rich materials. Their acid/base properties were tailored by the introduction of sodium and/or carbonate entities. The various hydroxyapatite solids were characterized by chemical analysis, IR, XRD and TGA techniques, and tested in methanol thiolation. The acid/base properties were evaluated using the isopropanol decomposition as a test reaction. Catalytic performances were found to be related to their acid/base properties. Total methanol conversion at 400 °C with high selectivity in methanethiol (60%) was obtained for the Na-CO3 modified Hap.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 164, Issue 1, 30 April 2011, Pages 124–130
Journal: Catalysis Today - Volume 164, Issue 1, 30 April 2011, Pages 124–130
نویسندگان
Carole Lamonier, Jean-François Lamonier, Belaïd Aellach, Abdelaziz Ezzamarty, Jacques Leglise,