The conversion of biomasses into valuable chemicals is one of the most important aspects of the biorefinery concept, the aim of which is to develop integrated processes for the transformation of renewables and the creation of a biomass-derived chemical platform. Cellulose is one of the most important and abundant type of biomass in nature; it can be collected from agricultural, forestry and urban waste, while avoiding competition with renewable resources focused on satisfying food demand. The aim of this work is to compare the performance in cellulose hydrolysis with metallic phosphates catalysts (zirconium and niobium phosphates), after pretreatment of the biomass with different procedures .For both catalysts, combining the pretreatment of cellulose with the acid-catalysed hydrolysis allowed to considerably improve the yield to glucose and HMF compared to the hydrolysis of untreated cellulose. Regarding the catalytic properties, the correlatation between the catalytic behavior of zirconium and niobium phosphates with their acidic properties has been investigated. In particullar, zirconium phosphate presented a high conversion of the substrate and a good productivity to the various products, with a better selectivity to glucose than to successive products. Conversely, niobium phosphate was more selective to HMF.

Integrated Catalytic Process for Cellulose Hydrolysis: A Comparison of Different Pretreatments

A. M. Raspolli Galletti;H. Gomez Bernal;C. Antonetti
2016-01-01

Abstract

The conversion of biomasses into valuable chemicals is one of the most important aspects of the biorefinery concept, the aim of which is to develop integrated processes for the transformation of renewables and the creation of a biomass-derived chemical platform. Cellulose is one of the most important and abundant type of biomass in nature; it can be collected from agricultural, forestry and urban waste, while avoiding competition with renewable resources focused on satisfying food demand. The aim of this work is to compare the performance in cellulose hydrolysis with metallic phosphates catalysts (zirconium and niobium phosphates), after pretreatment of the biomass with different procedures .For both catalysts, combining the pretreatment of cellulose with the acid-catalysed hydrolysis allowed to considerably improve the yield to glucose and HMF compared to the hydrolysis of untreated cellulose. Regarding the catalytic properties, the correlatation between the catalytic behavior of zirconium and niobium phosphates with their acidic properties has been investigated. In particullar, zirconium phosphate presented a high conversion of the substrate and a good productivity to the various products, with a better selectivity to glucose than to successive products. Conversely, niobium phosphate was more selective to HMF.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/955346
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