Energy Efficiency Factors PTEF

Energy efficiencies have been evaluated using factors such as the Electrical Energy per Order (EE/0) (Bolton and Cater, 1994 Notarfonzo and McPhee, 1994), the quantum yield and the appai ent quantum yield (Fox and Dulay, 1993 Nimlos et al., 1993 Sczechowski et al., 1995 Valladares and Bolton, 1993 Zhang et al., 1994a). More recently, SeiTano and de Lasa (1997) proposed a photo-catalytic themiodynamic efficiency factor (PTEF) based on thermodynamic considerations. 

The Photochemical Thermodynamic Efficiency Factor (PTEF) is an energy ratio equating the energy used to achieve the photocatalytic conversion of organic molecules over the energy absorbed by the photocatalyst. This parameter was first introduced by Serrano and de Lasa (1997) and evaluates the performance of photocatalytic reactors on a thermodynamic basis. 

Furthermore, the extensive applicability of photocatalysis has essentially become a problem of energy efficiency. As a result, the quantification of these energy efficiency factors is a major issue. Thus, Chapter VI considers these factors from two perspectives quantum efficiencies and Photochemical Thermodynamic Efficiency Factor (PTEF), the latter being a new efficiency factor introduced by the authors. 

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