Dew points for two synthetic natural gas (SNG) mixtures between 1.2 × 10 5 and 81.8 × 10 5 Pa in the temperature range from 213.6 to 261.4 K, four SNG + water mixtures between 1.1 × 10 5 and 41.0 × 10 5 Pa and temperatures from 244.7 to 288.1 K, and four SNG + water + methanol mixtures between 1.1 × 10 5 and 20.7 × 10 5 Pa and temperatures from 247.6 to 288.6 K were experimentally determined. The experimental results obtained on the multicomponent systems were analyzed in terms of a predictive excess function-equation of state (EF-EOS) method, which reproduced experimental dew point temperature data with absolute average deviation (AAD) between 0.9 and 3.1 K for the dry systems, from 0.0 to 1.6 K for the systems with water, and from 0.0 to 3.0 K for the systems with water and methanol. The experimental results obtained for synthetic natural gas (SNG) + water mixtures at pressure values higher than 5 × 10 5 Pa were also compared to a predictive equation of state (EOS) model. It reproduced experimental dew point temperature data within AAD between 1.8 and 5.3 K.
Experimental measurements of dew points for five synthetic natural gas (SNG) mixtures between 1.9 × 10 5 and 106.0 × 10 5 Pa in the temperature range from 195.5 to 277.3 K and nine SNG + water + methanol mixtures between 1.4 × 10 5 and 73.1 × 10 5 Pa and at temperatures from 237.3 to 288.2 K were determined. The experimental results obtained on the multicomponent systems were analyzed in terms of an equation of state chemical reticular method, which reproduced experimental dew-point temperature data within an absolute average deviation between 0.8 and 3.7 K for the dry systems and from 0.5 to 1.9 K for the systems with water and methanol.
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