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The simplex optimization for high porous carbons preparation

Sreńscek-Nazzal J., Michalkiewicz B.

Polish Journal of Chemical Technology

2011

Vol. 13, nr 4

63-70

The microporous carbon materials were prepared by chemical activation of Polish coal with potassium hydroxide using the simplex design method for planning the experiments. The experimental parameters were varied to identify the optimum conditions. Coal can be an excellent starting material for the preparation of high porous carbons for natural gas storage. The porosity of the resultant carbons was characterized by nitrogen adsorption (-196oC). Methane adsorption was investigated in a volumetric laboratory installation at range pressures from 1 to 3.5 MPa (25oC). The best results of methane storage capacity (557 cm3 . g-1) were obtained when using an impregnation ratio 3.41/1 KOH/precursor and temperature at 592oC, (SLANG = 2091 m2 . g-1). The parameters of the preparation of high porosity and high methane adsorption carbon were determined by a fast and simple method.

Preparation and properties of porous carbon material containing magnesium oxide

Przepiórski J., Czyżewski A., Kapica J., Casa-Lillo M. A. de la

Polish Journal of Chemical Technology

2011

Vol. 13, nr 4

42-46

Porous carbons loaded with magnesium oxide were prepared through one-step process. Poly(ethylene terephthalate) and natural magnesite were used as carbon source and MgO precursor, respectively. An impact of a temperature and relative amounts of raw components used for preparations on the textural parameters of resulting hybrid materials is presented and discussed. As found, pore structure parameters tend to decrease along with MgO loading and temperature used during preparation process. Micropore area is the parameter being reduced primarily.

Porous carbons from Novolac resin activated with solid NaOH

Pająk J., Łabojko G., Lachowski A.

Polish Journal of Applied Chemistry

2007

Vol. 51, nr 1-2

43-48

Microporous carbons were prepared from Novoiac resin acti\ cited in the reaction with solid NaOH . The effects of activation temperature and time and the NaOH/resin ratio on the porosity were studied. It was shown that the changes in the reaction temperature (within 600-800°C) and reaction time had no significant effect on the porosity whereas NaOH/resin ratio had strong effect on the porosity. The ratio of 2:1 appeared to be the most appropriate for obtaining highly porous carbons. The influence of HMTAused for Novoiac curing on the yield and the characteristics of activated carbon was also investigated. The curing before activation increased the yield of final product without decreasing its porosity.