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Table 1 Effects of reaction parameters on the generation of 5-HMF and furfural during flowthrough pretreatment

From: Enhancement of total sugar and lignin yields through dissolution of poplar wood by hot water and dilute acid flowthrough pretreatment

Flow rate (mL/minute) Temperature (°C) Reaction time (minutes)a H2SO4concentration (%) pH 5-HMF (%) Furfural (%)
10 220 5 0 3.98 0 0
10 220 10 0 3.90 0 0
10 240 5 0 3.77 1.8 0
10 240 10 0 3.67 3.1 0
10 250 5 0 3.66 2.8 0.7
10 250 10 0 3.56 3.1 0.8
10 220 5 0.05 2.41 1.3 0
10 240 5 0.05 2.36 4.5 1.2
25 240 6 0 3.73 0 0
25 240 10 0 3.67 0 0
25 270 6 0 3.21 0 0
25 270 10 0 3.18 0 0
25 280 6 0 3.19 3.0 0.5
25 240 6 0.05 2.34 0 0
25 250 6 0.05 2.28 2.6 0.3
62.5 270 5.6 0 3.23 0 0
62.5 280 5.6 0 3.12 1.6 0
62.5 250 5.6 0.05 2.33 1.2 0
  1. aIncluding the preheating time.