A comparison of dilute aqueous p-toluenesulfonic and sulfuric acid pretreatments and saccharification of corn stover at moderate temperatures and pressures

作者：Amarasekara Ananda S^*; Wiredu Bernard

来源：Bioresource Technology, 2012, 125: 114-118.

DOI：10.1016/j.biortech.2012.08.112

• Corn stover
• p-Toluenesulfonic acid
• Sulfuric acid
• Pretreatment
• Saccharification

Single step pretreatment-saccharification of corn stover was investigated in aqueous p-toluenesulfonic and sulfuric acid media. Dilute aqueous solution of p-toluenesulfonic acid was a better catalyst than aqueous sulfuric acid of the same H+ ion concentration for single step pretreatment-saccharification of corn stover at moderate temperatures and pressures. For example, 100 mg corn stover heated at 150 degrees C for 1 h in 0.100 M H+ aqueous sulfuric acid produced 64 mu mol of total reducing sugars (TRS), whereas the sample heated in 0.100 M H+ p-toluenesulfonic acid produced 165 mu mol of TRS under identical conditions. Glucose yield showed a similar trend, as aq. sulfuric acid and p-toluene sulfonic acid media produced 29 and 35 mu mol of glucose respectively after 2.5 h. Higher catalytic activity of p-toluenesulfonic acid may be due to an interaction with biomass, supported by repulsion of hydrophobic tolyl group by the aqueous phase.

• 出版日期2012-12