Kinetic of ZrW catalyzed cellulose hydrothermal conversion: Deeper understanding of reaction pathway via analytic tools improvement

Advances in porous and nanoscale catalysts for viable biomass conversion

“…For instance, hydronium ions can act as acidic sites for the acid-catalyzed reactions, especially for the hydrolysis of cellulose to glucose. 37,492,496 On the other hand, hydroxyl species can act as the source of oxygen for biomass oxidation reactions, such as HMF oxidation to 2,5-furandicarboxylic acid 497 and galacturonic acid oxidation to galactaric acid. 498 Recently, Meng et al 499 pointed out the promoting role of water, which can suppress the side reactions of HMF, in the decarbonylation of HMF towards furfuryl alcohol synthesis.…”

ZrW catalyzed cellulose conversion in hydrothermal conditions: Influence of the calcination temperature and insights on the nature of the active phase

“…The solubility of microcrystalline cellulose in water was increased with the temperature: 35% of crystalline cellulose can be dissolved at 190 • C after 24 h of reaction. Since these earlier studies, we have completed the available analytic tools with FTIR analysis of unconverted cellulose [39]. As reported in the experimental part, it is now possible to discriminate between the cellulose conversion (from FTIR) from the cellulose solubility (from TOC).…”

“…The conversion of cellulose was calculated as the ratio of the cellulose consumption in the reaction and the initial cellulose. The unconverted cellulose in solid residue after reaction was measured by quantitative FTIR [39].…”

A Landscape of Lignocellulosic Biopolymer Transformations into Valuable Molecules by Heterogeneous Catalysis in C’Durable Team at IRCELYON

“…Interestingly, in the absence of Pt but still under H2 atmosphere, another differe route occurred forming 2,5-hexanedione as main product (Scheme 4) with WOx-ZrO2 [6 This was possible from hydroxyl groups abstraction promoted by this catalyst under t hydrothermal conditions as proven by quantitative Infra-Red spectroscopy analysis a kinetic investigations [67]. This highlights the different mode of action of WOx-ZrO2 WOx-Al2O3 in the depolymerization of cellulose.…”