Oxycaloric quotient

The ratio between the enthalpy of combustion and the degree of reduction is the oxycaloric quotient, Qq. Similarly, the modified oxycaloric quotient is defined as ... 

The interest of this notion is that several authors [27,28,30,45-47] have reported an almost constant value of the oxycaloric quotient for CHON compounds. Since enthalpy of combustion is defined with respect to a reference state [48], this state must be the same as for the degree of reduction, i.e. for any species / ... 

The average oxycaloric quotient is -112.4 kJ e -moP for the 30 strains. Thus, a good estimate of the enthalpy of combustion is obtained with Thornton s rule. The low variability in y among the different strains (Table 11) is reflected by the similar modified enthalpy of combustion of bacteria (- 460.3 kJ CmoP ) and yeast (-481.1 kJ C-moP ). Thus, an average value can be used to calculate the energy balance in a first approximation. 

Table 17 Average enthalpy of combustion, modified enthalpy of combustion and oxycaloric quotient of biomass. The standard deviation for each group is indicated in parenthesis [38],...

Randolph et al. [78] developed a control strategy based on the estimation of the respiratory quotient of S. cerevisiae from heat flow rate measurements and rcoj In fact, the oxygen consumption rate can be estimated from and the oxycaloric quotient, Qo, since almost all the heat released is due to the... 

Figure 29 Linear relation between the heat produced and the amount of hydrogen consumed. Because the degree of reduction of hydrogen is 2, the slope is close to two time the oxycaloric quotient Qo- (Redrawn from Reference [77] with permission of the author and publisher).

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