نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده مهندسی شیمی و نفت، دانشگاه تبریز
2 دانشگاه تبریز
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
Increasing the concentration of carbon dioxide in the atmosphere has forced governments to place this issue among their most important problems. There are different methods to capture carbon dioxide. One of the most important ones is adsorption that employs adsorbents such as activated carbon, which can be synthesized from various bio-wastes. In this research, activated carbon was synthesized from Oleaster seed to adsorb CO2 by investigating various effective parameters as well as its stability during adsorption/regeneration cycles. The CO2 adsorption capacity of the adsorbents was investigated utilizing thermogravimetric analysis (TGA). The adsorbent synthesized in the weight ratio of KOH: biomass as 2:1, with the adsorption capacity of 2.78 mmol/g was introduced as the selected sample. Results indicated that with the increase in temperature from 25 to 50°C, at CO2 concentration of 90%, the amount of adsorption decreased from 2.78 to 1.79 mmol/g, due to the endothermic nature of CO2 adsorption process. It was also found that by reducing the entering concentration of CO2 from 90 to 10%, the CO2 adsorption rate of the selected adsorbent decreased from 2.78 mmol/g to 1.03 mmol/g, regarding less contact between the adsorbent particles and CO2 molecules. It was concluded that the adsorbent synthesized from Oleaster seed shows an acceptable capability to adsorb CO2. This adsorbent also showed an excellent stability during the cycles, which makes us to introduce it as a good candidate for industrial applications.
کلیدواژهها [English]
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