Solid-State Kinetic Investigations of Nonisothermal Reduction of Iron Species Supported on SBA-15
المؤلفون المشاركون
Genz, N. S.
Baabe, D.
Ressler, T.
المصدر
Journal of Analytical Methods in Chemistry
العدد
المجلد 2017، العدد 2017 (31 ديسمبر/كانون الأول 2017)، ص ص. 1-13، 13ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2017-11-01
دولة النشر
مصر
عدد الصفحات
13
التخصصات الرئيسية
الملخص EN
Iron oxide catalysts supported on nanostructured silica SBA-15 were synthesized with various iron loadings using two different precursors.
Structural characterization of the as-prepared FexOy/SBA-15 samples was performed by nitrogen physisorption, X-ray diffraction, DR-UV-Vis spectroscopy, and Mössbauer spectroscopy.
An increasing size of the resulting iron species correlated with an increasing iron loading.
Significantly smaller iron species were obtained from (Fe(III), NH4)-citrate precursors compared to Fe(III)-nitrate precursors.
Moreover, smaller iron species resulted in a smoother surface of the support material.
Temperature-programmed reduction (TPR) of the FexOy/SBA-15 samples with H2 revealed better reducibility of the samples originating from Fe(III)-nitrate precursors.
Varying the iron loading led to a change in reduction mechanism.
TPR traces were analyzed by model-independent Kissinger method, Ozawa, Flynn, and Wall (OFW) method, and model-dependent Coats-Redfern method.
JMAK kinetic analysis afforded a one-dimensional reduction process for the FexOy/SBA-15 samples.
The Kissinger method yielded the lowest apparent activation energy for the lowest loaded citrate sample (Ea ≈ 39 kJ/mol).
Conversely, the lowest loaded nitrate sample possessed the highest apparent activation energy (Ea ≈ 88 kJ/mol).
For samples obtained from Fe(III)-nitrate precursors, Ea decreased with increasing iron loading.
Apparent activation energies from model-independent analysis methods agreed well with those from model-dependent methods.
Nucleation as rate-determining step in the reduction of the iron oxide species was consistent with the Mampel solid-state reaction model.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Genz, N. S.& Baabe, D.& Ressler, T.. 2017. Solid-State Kinetic Investigations of Nonisothermal Reduction of Iron Species Supported on SBA-15. Journal of Analytical Methods in Chemistry،Vol. 2017, no. 2017, pp.1-13.
https://search.emarefa.net/detail/BIM-1170259
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Genz, N. S.…[et al.]. Solid-State Kinetic Investigations of Nonisothermal Reduction of Iron Species Supported on SBA-15. Journal of Analytical Methods in Chemistry No. 2017 (2017), pp.1-13.
https://search.emarefa.net/detail/BIM-1170259
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Genz, N. S.& Baabe, D.& Ressler, T.. Solid-State Kinetic Investigations of Nonisothermal Reduction of Iron Species Supported on SBA-15. Journal of Analytical Methods in Chemistry. 2017. Vol. 2017, no. 2017, pp.1-13.
https://search.emarefa.net/detail/BIM-1170259
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1170259
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر