Development of porosity in carbons from yeast grains by activation with alkali metal carbonates.
Cellular structured activated carbon samples were prepared with the aid of alkali carbonates X2CO3 (X = Li, Na, K, Rb, or Cs) from dry bread yeast with a milling procedure. The resultant carbon possesses a very large adsorption amount even for supercritical methane. The activation with Cs2CO3 gave the greatest surface area of 2420 m2 g(-1) from the subtracting pore effect method. The activation efficiency of X2CO3 (X = Li, Na, K, Rb, and Cs) was associated with the order of Gibbs free energy of X2O (X = Li, Na, K, Rb, and Cs) which should play an important role in the gasification. The carbon activated with Rb2CO3 gave the greatest adsorption amount of supercritical methane of 90 mg g(-1) at 0.9 MPa at 303 K.
Urabe
Y
Y
Ishikura
T
T
Kaneko
K
K
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002254:Carbonates / Q000737:chemistry*; D008672:Metals, Alkali / Q000737:chemistry*; D008697:Methane / Q000737:chemistry; D016062:Porosity; D011312:Pressure; D013696:Temperature; D015002:Yeast, Dried / Q000737:chemistry*
D002254:Carbonates; D008672:Metals, Alkali; D002244:Carbon; D008697:Methane