earticle

영어

In acid catalyzed hydrolysis the cellulose polymer is primarily broken down into glucose in the presence of an acid catalyst, unlike the hemicellulose polymer, which mainly depolymerizes into xylose under acidic hydrolysis conditions. The glucose then decomposes to 5-hydroxymethylfurfural (5-HMF), which is further converted into a series of lower molecular weight chemicals such as levulinic acid and formic acid. Furfural is a known product of the acid catalyzed decomposition of C5-sugars, particularly xylose, along with other chemical compounds. The presence of these compounds in ethanol production from biomass is undesirable because some act as inhibitors of the fermentation process, although to different extents. Determining the optimum reaction conditions is extremely difficult, in part because of the presence of the sugars as well as undesired products in the fermentation process. Hence, for this study we investigate the behaviors of the undesired products at various acid hydrolysis conditions. This result must be so useful for studying the optimization the hydrolysis conditions.