Abstract
The simplex optimization for high porous carbons preparation 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 (-196°C). Methane adsorption was investigated in a volumetric laboratory installation at range pressures from 1 to 3.5 MPa (25°C). 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 592°C, (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.
Highlights
Natural gas (NG) is a alternative fuel, due to its low price and various environmental advantages
The following different categories are known for natural gas storage: liquefied natural gas (LNG), compressed natural gas (CNG), adsorbed natural gas (ANG) and NGH2
We demonstrate the chemical activation of Polish coal for ANG application with potassium hydroxide (KOH) utilizing the simplex design method for planning the experiments
Summary
Natural gas (NG) is a alternative fuel, due to its low price and various environmental advantages. NG vehicles have the potential to lower polluting emissions, especially in urban areas, where air quality has become a major public health concern. The following different categories are known for natural gas storage: liquefied natural gas (LNG), compressed natural gas (CNG), adsorbed natural gas (ANG) and NGH (natural gas hydrates)[2]. ANG and NGH are major alternative storage methods. Methane can be stored in wet carbon and this method is called NGH. Nowadays ANG and NGH is not suitable for on-board storage but this method has been studied and developed. Liu et al.[2] achieved on the wet carbons volumetric storage capacity equal to 204 V/V. The authors reached the same fuel storage capacity but the storage pressure was twice lower CNG
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