✦ LIBER ✦

Activated Carbon Preparation from Lignin by H3PO4 Activation and Its Application to Gas Separation

✍ Scribed by Y. Sun; G. Yang; J. Zhang; Y. Wang; M. Yao

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 342 KB
Volume: 35
Category: Article
ISSN: 0930-7516
DOI: 10.1002/ceat.201100309

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✦ Synopsis

Activated carbons were produced from corn straw lignin using H 3 PO 4 as activating agent. The optimal activation temperature for producing the largest BET specific surface area and pore volume of carbon was 500 °C. The maximum BET specific surface area and pore volume of the resulting carbon were 820 m 2 g -1 and 0.8 cm 3 g -1 , respectively. The adsorption isotherm model based on the Toth equation together with the Peng-Robinson equation of state for the determination of gas phase fugacity provide a satisfactory representation of high pressure CO 2 , CH 4 and N 2 adsorption. The kinetic adsorption results show that the breakthrough difference between CO 2 and CH 4 is not obvious, indicating that its kinetic separation performance is limited.

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