Open Access

Table A.1

Compilation of molecular diffusion coefficients*

Gas mixture Diffusion coefficient cm2 s−1 Reference
Ar–CO2 17.6Tn1.65exp(89.1/Tn)/pCO2${17.6T_n^{1.65}\exp \left( { - 89.1/{T_n}} \right)/{p_{{\rm{C}}{{\rm{O}}_2}}}}$ Mason & Marrero (1970)
Ar–O 7.61Tn1.84/pO${7.61T_n^{1.84}/{p_{\rm{O}}}}$ Mason & Marrero (1970)
O2–CO2 15.8Tn1.66exp(61.3/Tn)/pCO2${15.8T_n^{1.66}\exp \left( { - 61.3/{T_n}} \right)/{p_{{\rm{C}}{{\rm{O}}_2}}}}$ Mason & Marrero (1970)
O2–O 17.9Tn1.73exp(16.7/Tn)/pO$17.9T_n^{1.73}\exp \left( { - 16.7/{T_n}} \right)/{p_{\rm{O}}}$ García Muñoz (2007)
H2–CO2 31.8Tn1.75exp(11.7/Tn)/pCO2${31.8T_n^{1.75}\exp \left( { - 11.7/{T_n}} \right)/{p_{{\rm{C}}{{\rm{O}}_2}}}}$ Mason & Marrero (1970)
H2–O 108Tn1.63exp(22/Tn)/pO${108T_n^{1.63}\exp \left( { - 22/{T_n}} \right)/{p_{\rm{O}}}}$ García Muñoz (2007)
H–CO2 74.4Tn1.71exp(12/Tn)/pCO2${74.4T_n^{1.71}\exp \left( { - 12/{T_n}} \right)/{p_{{\rm{C}}{{\rm{O}}_2}}}}$ García Muñoz (2007)
H–O 100Tn1.71/pO$100T_n^{1.71}/{p_{\rm{O}}}$ García Muñoz (2007)
NO–CO2 15.2Tn1.67exp(42/Tn)/pCO2${15.2T_n^{1.67}\exp \left( { - 42/{T_n}} \right)/{p_{{\rm{C}}{{\rm{O}}_2}}}}$ García Muñoz (2007)
NO–O 33.8Tn1.63exp(33/Tn)/pO${33.8T_n^{1.63}\exp \left( { - 33/{T_n}} \right)/{p_{\rm{O}}}}$ García Muñoz (2007)
N–O 21.3Tn1.74exp(2/Tn)/pO${21.3T_n^{1.74}\exp \left( { - 2/{T_n}} \right)/{p_{\rm{O}}}}$ García Muñoz (2007)
O–CO2 27.8Tn1.63exp(48/Tn)/pCO2${27.8T_n^{1.63}\exp \left( { - 48/{T_n}} \right)/{p_{{\rm{C}}{{\rm{O}}_2}}}}$ García Muñoz (2007)

* All values in the tabulated expressions are in Gaussian units: pCO2${p_{{\rm{C}}{{\rm{O}}_2}}}$ and pO stand for the CO2 and O partial pressures in dyns cm–2, whereas Tn stands for the neutral temperature in K.

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