Investigations on the kinetics and thermodynamics of dilute acid hydrolysis of Parthenium hysterophorus L. substrate

Low temperature hydrochloric acid hydrolysis of corn stover. Kinetic, thermodynamics and characterization

“…Employing first order kinetic model only sugars production rate constants are calculated. According to Swati et al (2013), this model can be used for hydrolysis processes despising sugars decomposition, as shown in Table 2 rate constants obtained with first order model were lower in comparison to that obtained with Saeman and Saeman biphasic models, furthermore R 2 coefficients diminished. Experimental data for Furfural production were fitted to first order kinetic model (Figure 5), P o did not correspond to initial amount of holocellulose.…”

“…The k 2 rate constant observed in Saeman model corresponds to thermal decomposition of sugars into aldehydes, however, if this decomposition phase is not appreciated in experimental data first order kinetic model (Eq. 4) can be used as was reported by Swati et al (2013).…”

“…3). Moreover, from Saeman model and in agreement to Swati et al (2013), acid hydrolysis of lignocellulosic materials can also be studied employing first order kinetic model (Eq. 4).…”

“…The behavior of ∆H, ∆G and ∆S is in agreement with some papers reported previously. Swati et al (2013) determined kinetic and thermodynamic parameters of sulfuric acid hydrolysis of Parthenium hysterophorus employing first order kinetic model. They observed that the production of reducing sugars is an endothermic and non-spontaneous reaction capable to produce stable sugars (negative entropies).…”

Correlation of the Product Yield with the Total Organic Carbon Yield in the Hydrothermal Conversion of Pure Celluloses in the Absence of Additives

“…As a result, 86% of total sugars, which included glucose, 61% of the initial cellulose, were obtained in a 1 wt % formic acid solution . Although kinetic studies on actual biomass materials such as agricultural wastes, − wood, , grasses, ,− medicinal plants, and waste newspaper have been reported under hydrothermal conditions, mostly in the presence of acids, those on pure fibrous cellulose samples rather than cellulose powder ,− are limited. From a practical point of view, these studies on the actual cellulosic biomass are of importance, but because of other ingredients such as hemicellulose and lignin in the systems, it is difficult to study the effects of reaction conditions on both the rates and product distributions.…”