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Table 2 Glucose mass balance of maleic acid pretreatment of wheat straw.

From: Optimization of the dilute maleic acid pretreatment of wheat straw

Run Pre-treatment time (min) Pre-treatment temperature (°C) Maleic acid concentration (mM) Glucose monomers in aqueous (%) HMF in aqueous (%) Glucose oligomers in aqueous (%) Glucose in pressed material (%) Not corrected for a, b, and c Glucose in pressed material (%) Corrected for a, b, and c Total (%)
     a b c d e a+b+c+e
1 10 130 11 1 0 2 24 24 27
2 50 130 89 2 0 5 54 54 61
5 50 170 11 1 0 6 63 63 70
6 10 170 89 8 1 1 79 78 88
7 10 170 11 1 0 5 46 46 52
8 50 170 89 10 1 0 82 81 92
9 10 130 89 1 0 6 45 45 52
11 50 130 11 1 0 4 36 36 41
14 30 130 50 1 0 6 44 44 50
15 50 150 50 4 0 4 71 71 79
16 10 150 50 2 0 6 61 61 69
17 30 150 89 6 0 2 72 72 81
18 30 150 11 1 0 4 36 36 41
19 30 170 50 7 1 1 82 81 91
c×6 30 150 50 3 (0.1) 0 (0.0) 5 (0.2) 66 (1.0) 66 (1.0) 74 (0.9)
  1. c×6 = centre runs, six repeats. Average value given. Standard deviation between brackets. Percentages are expressed as glucose equivalents, as a fraction of total glucose equivalents present in untreated wheat straw.