การผลิตถ่านกัมมันต์จากซังข้าวโพดโดยการก่อกัมมันต์ร่วมด้วยกรดฟอสฟอริกและก๊าซคาร์บอนไดออกไซด์

Abstract

The objective of this research is to investigate an alternative approach in producing activated carbon from corncob through single stage physical-chemical activation using phosphoric acid and carbon dioxide as assistive agents. The combined pyrolysis and activation process are studied by varying temperature between 600 and 800 oC and time between 2- and 4-hours activation period. The results confirm expectations in terms of product yield and physical properties with optimal condition of 0.1 molar acid concentration at 800 oC temperature and 2 hours retention period. The produced substance yields BET surface area of 825.72 m2/g with Iodine number of 546.76 mg/g which is well in range of commercial grade activated carbon available in Thailand.