Question

A sample of natural gas flows at 700 psia and 320 ° F. Natural gas consists of the following: 600g of CH_⁴, 380g of C₃H₈, 1,300g of C₂H₆ and 100g of H₂. Natural gas must pass through an absorber where 60% of the volume of C₃H₈ and 5% of H₂ are separated. For this process, determine:
1)The process flow diagram.
2)The analysis of degrees of freedom of the process.
3)The concentration in mol% of the absorbed gas streams.
4)The concentration in mol% of the residual gas.

Answer 1

H2 CH4, C3H8, C2 HG, H2 sud F Product P Watts Absorber Residual R CHA, C3H8, Cat6, H2 let F, PAR are milar How of sud, Produd & residual resp. for ideal PV = nRT where van so mo s. Volume aborbed 2%. mole absorber. 604. Hg is absorbed Product: gas mêx. H2 final moles. Components Mass (kg) Mass (as) Moliwt (B/Ab mol ) ritical miles Product 1.323 Residen 0.0827 600 16 0.0827 0 I CHA 2 C3 lt8 380 0.8378 44 0.019 0.0113 0.0077 3 Cat6 1300 2.866 30 0.0955 0.0955 14 H2 100 0.2205 2 0.1103 0.0055 0.1048 {=0.3075 E=0.0168 {=0.2907