AI Article Synopsis
- High-value xylo-oligosaccharides can be produced by breaking down lignocellulosic biomass, like corncob, with acetic acid, but separating the acetic acid from the xylo-oligosaccharides is a key challenge.
- Four neutralizers (CaCO, CaO, NaCO, and NaOH) were tested to chemically bind acetic acid in the reaction mixture, achieving high locking rates of over 92%.
- Among the neutralizers, NaCO was identified as the most effective for locking acetic acid while minimizing the impact on xylo-oligosaccharide yield, leading to a more efficient industrial production process.
Article Abstract
Xylo-oligosaccharides with high value could be obtained by acidolysis of lignocellulosic biomass with acetic acid, which was an urgent problem to solve for the separation of acetic acid from crude xylo-oligosaccharides solution. Four neutralizers, CaCO, CaO, NaCO, and NaOH, were used for in situ chemically locking the acetic acid in the acidolyzed hydrolysate of corncob. The chemically locked hydrolysate was analyzed and compared using vacuum evaporation and spray drying. After CaCO, CaO, NaCO, and NaOH treatment, the locking rates of acetic acid were 92.62%, 94.89%, 95.05%, and 95.58%, respectively, and 39.55 g, 41.13 g, 41.78 g, and 41.87 g of the compound of xylo-oligosaccharide and acetate were obtained. Sodium neutralizer had lesser effect on xylo-oligosaccharide content, and NaCO was the best chemical for locking acetic acid among these four neutralizers. This process provides a novel method for effectively utilizing acetic acid during the industrial production of xylo-oligosaccharides via acetic acid.
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| http://dx.doi.org/10.1007/s12010-021-03550-8 | DOI Listing |
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