Chitosan (CTS) aerogels containing various amounts of graphite oxide (GO) were prepared using freeze-drying. The aerogels were characterized using Raman, FTIR and X-ray diffraction techniques. The N2 adsorption/desorption isotherms at -196 oC indicating that the BET surface area increased from 153 to 374 m2/g by introducing 10 wt% GO into the CTS sorbent. Adsorption measurements were conducted from low pressure to 1 bar at temperatures of 25, 50, and 75 oC. The effects of GO content and carbonization on the specific surface area of the aerogels and CO2 capture were investigated. Breakthrough curves showed that the CO2 adsorption capacities increased linearly with GO content. The amount of CO2 adsorbed at 25 oC increased from 1.92 to 3.48 mol/kg with addition of 10 wt% GO. The Freundlich isotherm model showed a good fit of the adsorption data at 25 oC.Keywords  : GO; chitosan; CO2; thermal and mechanical properties, adsorption.

Graphite oxide/chitosan aerogels as sorbents for CO<sub>2</sub> capture

243rd National Meeting (2012)

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Graphite oxide/chitosan aerogels as sorbents for CO2 capture

Graphite oxide/chitosan aerogels as sorbents for CO₂ capture