Preparation of high specific surface area activated carbon from tobacco stem with potassium carbonate activation by microwave heating
Year: 2008
Type: article
Abstract: A series of high specific surface area activated carbons was prepared with char of tobacco stems as raw materials and potassium carbonate as activating agent using a microwave heating procedure.The effects of K2CO3/C ratio and microwave heating time on the yield and adsorption properties of activated carbon were systematically studied.The optimum condition has been obtained.Thus the experimental results have shown that the yield of the activated carbon was 25.48% when the methylene blue adsorption reached 517.5mg/g and iodine value was 1834mg/g.The adsorption properties exceeded that of the standard of activated carbon for electric double-layer capacitor.The activation time of microwave heating was shortened 78.26% comparing with that of the conventional process.Furthermore,the activated carbon manufactured under optimum condition was tested by nitrogen adsorption at 77K.The porous structures of the activated carbon were investigated by Non Local Density Function Theory(NLDFT).The results showed that the obtained activated carbon consisted of abundant micropores and mesopores with specific surface area of 2557m2/g,total pore volume of 1.6470ml/g.
Author: Zhu Xue-yun
Institution: Kunming University of Science and Technology
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,258
OpenAlex ID: W2360729926