Water Content of Sour Gas
Water content of sour gas, which is natural gas containing significant amounts of hydrogen sulfide \(H_2S\), can be influenced by various factors such as temperature, pressure, and the composition of the gas. The water content in sour gas is typically higher than in sweet gas due to the presence of \(H_2S\), which can dissolve more water.
To determine the water content of sour gas, empirical correlations or software models are often used. These models take into account the gas composition, temperature, and pressure. One widely used empirical correlation is the McKetta-Wehe chart, which provides water content values for natural gas at various temperatures and pressures. For sour gas, corrections to these values are made based on the concentration of \(H_2S\).
In practice, the water content is used for the processing and transportation of sour gas. High water content can lead to the formation of hydrates and corrosion issues in pipelines and equipment. Therefore, understanding and controlling the water content is essential for efficient and safe operations in the gas industry.
Water Content of Sour Gas Formula
|
||
|
\( WC \;=\; M_{hc} \cdot W_{hc} + M_{cd} \cdot W_{cd} + M_{hs} \cdot W_{hs} \) (Water Content of Sour Gas) \( M_{hc} \;=\; \dfrac{ WC - [\;( M_{cd} \cdot W_{cd} ) - ( M_{hs} \cdot W_{hs} )\;] }{ W_{hc} }\) \( W_{hc} \;=\; \dfrac{ WC - [\;( M_{cd} \cdot W_{cd} ) - ( M_{hs} \cdot W_{hs} )\;] }{ M_{hc} }\) \( M_{cd} \;=\; \dfrac{ WC - [\;( M_{hc} \cdot W_{hc} ) - ( M_{hs} \cdot W_{hs} )\;] }{ W_{cd} }\) \( W_{cd} \;=\; \dfrac{ WC - [\;( M_{hc} \cdot W_{hc} ) - ( M_{hs} \cdot W_{hs} )\;] }{ M_{cd} }\) \( M_{hs} \;=\; \dfrac{ WC - [\;( M_{hc} \cdot W_{hc} ) - ( M_{cd} \cdot W_{cd} )\;] }{ W_{hs} }\) \( W_{hs} \;=\; \dfrac{ WC - [\;( M_{hc} \cdot W_{hc} ) - ( M_{cd} \cdot W_{cd} )\;] }{ M_{hs} }\) |
||
| Symbol | English | Metric |
| \( WC \) = Water Content | \(dimensionless\) | - |
| \( M_{hc} \) = Mole Content of Hydrocarbon | \(dimensionless\) | - |
| \( W_{hc} \) = Water Content of Hydrocarbon | \(dimensionless\) | - |
| \( M_{cd} \) = Mole Content of Carbon Dioxide | \(dimensionless\) | - |
| \( W_{cd} \) = Water Content of Carbon Dioxide | \(dimensionless\) | - |
| \( M_{hs} \) = Mole Content of Hydrogen Sulfide | \(dimensionless\) | - |
| \( W_{hs} \) = Water Content of Hydrogen Sulfide | \(dimensionless\) | - |
