کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
210924 | 461733 | 2010 | 10 صفحه PDF | دانلود رایگان |
Activated carbons were obtained by carbonization of orange skin waste and partial gasification with CO2. The orange skin contains a significant amount of inorganic matter mainly potassium, calcium and phosphorus. CO2 gasification is catalyzed by potassium and calcium, resulting in carbons with a microporous structure. Thermal treatment up to 900 °C applied to orange skin-derived activated carbons yields carbons with a highly developed porous structure, and a significant contribution of mesopores, due to the activation effect of potassium compounds. This porous structure is initially blocked by the inorganic matter that is removed by a subsequent acid wash, opening the porous structure of the final carbon; an activated carbon with a very wide porous structure and a specific surface area of around 1200 m2/g was obtained. The activated carbon with high potassium content shows relatively high NO adsorption capacities in the presence of oxygen at 120 °C, probably due to the catalytic effect of potassium on the oxidation of NO. The breakthrough times of the NO adsorption in the presence of oxygen at 120 °C were predicted by the Bohart and Adams model with a relevant agreement between the calculated and the experimental times.
Journal: Fuel Processing Technology - Volume 91, Issue 10, October 2010, Pages 1345–1354