Sac. 2.2 Batch Reactor Design Equations 39 Now, the number of moles of A that remain in the reactor after a time r, N,, can be expressed in terms of NAO and X: Moles of A that The number of moles of A in the reactor after a conversion X has been achieved 1s When no spatial variations in reaction rate exist, the mole balance on spe- cies A for a batch system is given by the following equation [cf. Equation (1-5)J: This equation is valid whether or not the reactor volunle is constant. In the general reaction, Equation (2-2). reactant A is disappearing: therefore, we rnul- tiply both sides of Equation (2-5) by -1 to obtain the mole balance for the hatch reactor in the
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