Hight Performance Activated Carbon Produced From Black Liquor

  • Sutathip Siripanee นักศึกษา หลักสูตรวิศวกรรมศาสตรมหาบัณฑิต สาขาวิชาวิศวกรรมเคมี คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Pornnapa Kasemsiri ผู้ช่วยศาสตราจารย์ สาขาวิชาวิศวกรรมเคมี คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Khanita Kamwilaisak ผู้ช่วยศาสตราจารย์ สาขาวิชาวิศวกรรมเคมี คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Khwantri Saengprachatanarug ผู้ช่วยศาสตราจารย์ สาขาวิชาวิศวกรรมเกษตร คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
Keywords: Activated carbon, Lignin, Black liquor, Methylene blue


Lignin is a main component in black liquor from pulp and paper industry. Lignin can be used as fuel and raw material for activated carbon production due to its high carbon content. In this research work, activated carbon was prepared from lignin by chemical activation method. The preparation of activated carbon was impregnation by phosphoric acid and then carbonization. The preparation is parameters such as phosphoric acid concentration (0-30%v/v), impregnation time (0-12h), and carbonization temperature (400 450 and 500oC) was investigated. Furthermore, physical and chemical properties of lignin and as-activated carbon were examined. The adsorption capacity of as-activated carbon was also determined by methylene blue (20-100ppm). It was found that specific surface area of as-activated carbon was increased with increasing of phosphoric acid concentration. The maximum specific surface area of 806 g/m2 with pore volume 2.02 nm and pore size 0.41 cm³/g was obtained at 30%v/v of phosphoric acid, impregnation time 8 h, and carbonization temperature 500oC. The microporous and mesoporous were observed in as-activated carbon. Interestingly, the obtained activated carbon can absorb 100% methylene blue adsorption within 2 h. It was fond that the method in this work provided


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