| Abstract |
Non Condensable gas (NCG) is one of the most important parameters in geothermal field that must be determined the concentrations in the steam. The concentration of non-condensable gas must be known for monitoring the quality of steam, conformity with the turbine requirement, geochemical data and reservoir evaluation. There are many methods for determine the NCG, but for determine every single parameter of NCG required high level analysis. NCG consist of CO2, H2S, NH3, H2, Ar, N2 and CH4. The result of analysis Argon and Nitrogen must be corrected by Oxygen as air contamination. But the common problem in Argon analysis using gas chromatography is not good separation between peak of Argon and Oxygen. Not all laboratories can analyze Argon and Oxygen with good separation. The studies that conducted by Laboratory of PT. Pertamina Geothermal Energy Kamojang Field, using gas chromatography with PDHID detector as the detector that 500 times more sensitive than TCD detector has successful identified five parameter of NCG that is H2, Ar, O2, N2 and CH4 in once running analysis. Especially were successful separated the Argon and Oxygen at room temperature without using the cryogenic or change the oven temperature to a minus temperature. With the good separation of Argon and Oxygen, the NCG analysis data can be used for geochemical and reservoir evaluations. |