Title:
Production of Activated Carbon from Cocoa Pod Husks and Banana Peels Using H3PO4 and H2SO4 as Activating Agents
Author(s):
Velázquez-Araque, L., Ordóñez Chávez, A., Cárdenas Calle, M.
Document(s):
Paper
Poster
Abstract:
The possibility of obtaining activated carbons (AC) using cocoa pod husks and banana peels was studied. For this purpose, a previous thermogravimetric analysis was carried out, which revealed that the optimum carbonization temperature for cocoa and banana peel samples is between 180°C and 350°C and that the optimum carbonization time is 1 hour and 20 minutes, with a mass reduction between 68% and 74% for cocoa pod husks and 74% to 76% for banana peels. Finally, the mass reduction percentage obtained in the carbonization stage was 60.36% for cocoa pod husk and 62.96% for banana peels. Chemical activation was carried out with phosphoric acid (H3PO4) and sulfuric acid (H2SO4) as activating agents at 85% and 50% for H3PO4 and 50% and 25% for H2SO4, with temperature and heating times similar to the carbonization stage. Moisture content, ash, iodine number and BET surface area of the samples were analyzed. It turned out that CCAS50 sample (50% H3PO4) showed the best physicochemical characteristics with a surface area of 838.52 m2/gCA, iodine number of 832.4 mgI/gCA, moisture content of 5.49% and ash content of 2.25%. These values are in agreement with the recommended values of INEN 1991 standard. Thus, CCAS50 sample resulted highly suitable to be used as filter a medium.
Keywords:
activated carbon, agricultural waste, cocoa pod husk, banana peels, chemical activation
Topic:
Biomass, Bio-Based Products and Bioenergy Integration
Subtopic:
Biomass use in biorefineries
Event:
31st European Biomass Conference and Exhibition
Session:
3CV.6.17
Pages:
544 - 551
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-3CV.6.17
Price:
FREE
