A flat plug 30 mm thick having an area of 6×10-3 m2 is used to close an opening in a container. The gas O2 at 25 oC and 2 atm pressure is stored inside the container. Assume that the outside partial...

A flat plug 30 mm thick having an area of 6×10-3 m2 is used to close an opening in a container. The gas O2 at 25 oC and 2 atm pressure is stored inside the container. Assume that the outside partial pressure of O2 is zero and the solubility of O2 is 0.9 m3 gas (at 0 oC and 1 atm) per m3 solid per atm pressure of O2 , and the diffusivity of O2 in the solid material is equal to 0.11×10-10 m2/s. i- Calculate the total leakage of O2 through the plug to the outside in kgmol/s at a steady state. ii- Using the information given in the Appendix (Table Q1), determine the most appropriate material to be used for constructing the plug; and state why?.

Extracted text: Table Q1: Diffusivities and Permeabilities of gases in solid materials DAD Diffusion Coefficient [m*/s] Solubility, S m' solute(STP) m' solid atm Permeability, P m' solute(STP) S m atmim Solute (A) Solid (B) T(K) H, Vulcanized 298 0.85(10-) 0.040 0.342(10 10) rubber 298 0.21(10-9) 298 0.15(10-) 298 0.11(10-9) 290 0.103(10-°) 0.152(10-10) 0.054(10-10) 1.01(10-19) 0.070 N2 CO, H2 0.035 0.90 0.051 Vulcanized neoprene 300 0.180(10-9) 0.053 Polyethylene 298 303 6.53(10-12) 4.17(10-12) 1.52(10-12) 0.029(10-12) 0.0152(10-12) 0.15-0.68 x 10- H2 303 303 O, Nylon N2 Air English leather 303 298 H,0 Wax H,O Cellophane He Pyrex glass 0.16(10-10) 0.91-1.82(10 10) 4.86(10-15) 20.1(10-15) 306 311 293 373 SiO2 293 2.4-5.5(10-") 293 2.59(10-13) 293 1.3(10-34) Не 0.01 H2 Al Fe Cu