Separating Methane and Carbon Dioxide from Household Biogas
Keywords:
Biogas Separation, Biogas for Household, Methane, Carbon DioxideAbstract
The purpose of this study is to separate carbon dioxide from biogas at different pressures to obtain higher methane concentration for household use by mean of anaerobic fermentation of swine manure to produce biogas in four tanks of 200 liter fermentation tanks and to store in two tanks of 200 liter gas storage tanks. From the study, it was found that behavior of carbon dioxide capture affected in a direct variation. In other words, as gas pressure increased, percentage of carbon dioxide capture would increase also. In the portion of gas flow rate, it affected behavior of carbon dioxide capture in an inverse variation, that is, when gas flow rate decreased, the carbon dioxide capture percentage increased. From the results of the experiment, pressure swing adsorption (PSA) capture techniques were selected to capture carbon dioxide which was captured by molecular sieving carbon with 99.23%maximum CO2 capability before passing through methane separation unit. As for methane separation to increase concentration from the experiment, methane gas was originally contained approximately 65-68 % biogas; after the gas separation process, concentration rose to 98.26 % or about 33.85 % increase from the original concentration. Therefore, if upgrade methane is compressed in a storage container, it can be used in a variety of functions, such as fuel for cars, households cooking and etc.
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