Influence of Irradiance, Flow Rate, Reactor Geometry, and Photopromoter Concentration in Mineralization Kinetics of Methane in Air and in Aqueous Solutions by Photocatalytic Membranes Immobilizing Titanium Dioxide

Figure 3

Variation of K₁ and K₂ parameters, expressed in (ppm C)⁻¹ (see kinetic modeling in Experimental), as a function of flow rate (m³⋅h⁻¹), for photomineralization of methane in air, and experiments carried out at a fixed irradiance corresponding to 0.30 W𝑘₂=0.578±0.007cm⁻¹. The mean values of k₁ and k₂ parameters, resulting from modeling of these same experiments, were sensibly constant ⋅ ppm C𝛼min⁻¹; ⋅ ppm C⋅min⁻¹), independently on values of flow rates. Photocatalytic membranes used in the relative experiments did not contain any photopromoting agent.