Table 1
Physical properties of the main gases diluents in oxycombustion and conventional combustion with air at 1 atm pressure and at 1000 °C (Griffiths
and Barnard 1995; Cengel 2003)
Chemical
compound
Chemical
formula
Molecular
weight
[g/mol]
Density
(q) [kg/m
3
]
Specific heat
capacity (cq)
[kJ/mol K]
Thermal
conductivity
(k) [W/m K]
Thermal
diffusivity
(a) [m
2
/s]
Emissivity
and
absorptivity
Kinematic
viscosity (m)
[m
2
/s]
Mass
diffusivityª
(m
2
/s)
Prandtl
number
Nitrogen
28.01
0.24
34.18
0.082
9.83
 10
−3
*0
2.00
 10
−4
1.70
 10
−4
0.70
Carbon
dioxide
44.09
0.38
57.83
0.097
4.37
 10
−3
>0
1.31
 10
−4
1.30
 10
−4
0.75
Water
18.01
0.16
45.67
0.136
1.89
 10
−3
>0
3.2
 10
−4
–
4.60
Oxygen
31.99
0.27
36.08
0.087
8.67
 10
−3
*0
2.09
 10
−4
–
0.63
ªMass diffusivity refers to the binary diffusion of O
2 in CO
2 and N
2
274
I. Aguiar Severo et al.