Added Value per kg of Glyoxylic Acid

We assume the use of the same two-module cell, operating two 8-hour batches per day, 5 days per week, 45 weeks per year. 

Calculating as in Section 6.1.2.3, we make 1000/74 = 13.51 kmols, i.e., double the amount of product. Since, however, the number of batches has also doubled to 450, the values of Sections 6.1.2.3 and 6.1.2.4 remain unchanged. 

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Throughput (kg/annum) Added value per kg of glyoxylic acid (pounds) ... 

With three 7-hour batches per day, 7 days per week, but still 45 weeks per annum to provide some slack in the system, there will be 945 batches per annum, each producing (0.03 x 7)/8 = 0.0263 kmol. (Since catholyte volumes will be lower than before, minimization of holdup becomes more important.) Amount of product will be 0.0263 x 74 x 945 = 1800 kg per annum. The capital element will be 13,800/(3 x 945)= 4.87 and the running costs 0.83. The amount of glyoxylic acid produced per batch will be 1.95 kg and the added value per kg of product will be (4.87 -I- 0.83)/1.95 = 2.92. 

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