Oxidation of asphaltenes adsorbed onto NiO nanoparticles

Belal J. Abu Tarboush, Maen M. Husein*

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةمراجعة النظراء

24 اقتباسات (Scopus)

ملخص

Differential thermogravimetry (DTG) and differential scanning calorimetry (DSC) plots help identifying reaction zones and enable activation energy calculations. Recently, Nassar et al. [1,2] reported major shifts in the DTG combustion peaks and reaction zones between virgin and adsorbed asphaltenes onto commercial metal oxide nanoparticles. They attributed the accompanying reduction in activation energy to a significant catalytic role played by the nanoparticles, especially for NiO nanoparticles. It should be noted that in these experiments only monolayer adsorption from toluene model solutions was encountered. More recently, our group reported multilayer adsorption of asphaltenes from heavy oils onto in situ prepared and commercial NiO nanoparticles [3]. Contrary to the previous literature, the thermal behavior of these asphaltenes revealed a surface role entailing an enhanced exposure of adsorbed asphaltenes to the oxidant stream. In this work, we critically re-evaluated the claim of catalytic effect of nanoparticles [1,2,4,5] and provide an experimental protocol which demonstrates a surface effect.

اللغة الأصليةEnglish
الصفحات (من إلى)166-171
عدد الصفحات6
دوريةApplied Catalysis A: General
مستوى الصوت445-446
المعرِّفات الرقمية للأشياء
حالة النشرPublished - نوفمبر 28 2012

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