Kinetic Study of Dilute Nitric acid Treatment of Corn Stover at Relatively High Temperature

Abstract

Corn stover was hydrolyzed using dilute nitric acid at 150°C. Several concentrations of HNO 3 (0.2, 0.4 and 0.6 wt-%) and reaction times (0-60 min) were evaluated. The kinetic parameters of mathematical models for predicting the concentrations of xylose, glucose, arabinose, acetic acid, and furfural in the hydrolysates were determined. The hydrolysates obtained from corn stover can be used to produce methane by an anaerobic fermentation process. Thus, the hydrolysis process of corn stover using dilute nitric acid can be conceived as the first stage of an integrated strategy for corn stover utilization.

Kinetic study of levulinic acid production from corn stalk at relatively high temperature using FeCl3 as catalyst: A simplified model evaluated

“…However, owing to the value of k 2 not fitting well with the modified Arrhenius equation, the optimization of LA production could only focus on the variation of LA yield at a certain temperature. Therefore, a generalized model for predicting LA produced by the hydrolysis was developed (Zhang et al, 2011). Kinetic parameters k 1 , k 2 and [G] 0 were correlated with the concentration(C) of FeCl 3 solution by means of the empirical Eq.…”

Liquefaction of Biomass and Upgrading of Bio-Oil: A Review

“…The most studied method is acidic pre-treatment for biomass, and it could provide the satisfactory cellulose conversion [25]. According to the literature, H 2 SO 4 , HCl, H 3 PO 4 , and HNO 3 have been studied, and these acids would promote the hydrolysis of hemicelluloses and amorphous cellulose [25,40,41,42]. However, the concentrated acids are not favored due to the corrosion and toxicity in nature.…”

Condiciones óptimas de deslignificación del aserrín de Pinus patula como etapa crucial en la obtención de bioetanol

“…Diferentes tipos de métodos de pretratamientos han sido investigados por varios investigadores tales como explosión a vapor, tratamiento con ácido sulfúrico diluido, tratamiento con álcali, dióxido de azufre, extracción con solvente orgánico, agua subcrítica y supercrítica, tratamiento biológico mediante el empleo de hongos, entre otros (Liu y Wyman, 2005). Estudios de pretratamientos ácidos se han realizado empleando ácido sulfúrico (Hsu, Guo, Chen, Hwang, 2010), ácido clorhídrico (Marcotullio y Krisanti, 2011), ácido fosfórico (Geddes et al, 2010) y ácido nítrico (Zhang, Lu, Liu, Wang, y Zhang, 2011). En varios trabajos científicos se ha reportado que el pretratamiento ácido incrementa la hidrólisis de hemicelulosas y porciones de la celulosa amorfa y también incrementa la recuperación de monómeros de hemicelulosas en la fracción líquida y celulosa digestibles en la fracción sólida (Linde, Jakobsson, Galbe, y Zachhi, 2008;Sassner, Martensson, Galbe, y Zacchi, 2008;Yang y Wyman, 2008).…”