0000000000704365

AUTHOR

Giovanni Predieri

showing 2 related works from this author

Influence of the preparation method on the thiophene HDS activity of silica supported CoMo catalysts

2002

Abstract The effect of the preparation method of CoMo/SiO2 catalysts with and without sodium ions, on the hydrodesulfurization (HDS) of thiophene was investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N2 physisorption (BET). The samples were prepared by total sol–gel route, by classic wetness impregnation and by co-impregnation, in the presence of nitrilotriacetic acid (NTA), of commercial and sol–gel prepared silica. The influence of sodium ions added to the sol mixture and to the silica before the impregnation with Co and Mo salt solution, was also considered. The presence of sodium favoured the phase transition of amorphous silica to cristobalite with con…

chemistry.chemical_compoundTransition metalchemistryPhysisorptionProcess Chemistry and TechnologyInorganic chemistryThiopheneOxideHeterogeneous catalysisCristobaliteHydrodesulfurizationCatalysisCatalysisApplied Catalysis A: General
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Bio-inspired consolidants derived from crystalline nanocellulose for decayed wood

2018

Abstract Novel bio-inspired materials derived from crystalline nanocellulose (CNC) have been tested as wood consolidants. A suspension of CNC, produced by acid hydrolysis of cellulose and used as such or mixed with lignin and/or siloxane derivatives (PDMS), was applied on rotted wood samples of Norway spruce. X-Ray diffraction analysis on CNC powder showed high crystallinity index. Dynamic light scattering (DLS) measurement indicated a nearly uniform particle size distribution with an average hydrodynamic diameter for pure CNC smaller than that in the mixtures. Raman and FTIR spectroscopies suggested interactions between lignin, PDMS and CNC components. The storage modulus of wood samples, …

Wood consolidationMaterials sciencePolymers and PlasticsSettore ICAR/10 - Architettura Tecnica02 engineering and technology010402 general chemistryLignin01 natural sciencesNanocelluloseCrystalline nanocellulosechemistry.chemical_compoundCrystallinityDynamic light scatteringCrystalline nanocellulose Dynamic mechanical analysis Lignin Polydimethylsiloxane Wood consolidationMaterials ChemistryLigninCelluloseFourier transform infrared spectroscopySettore CHIM/02 - Chimica FisicaPolydimethylsiloxaneDynamic mechanical analysisOrganic ChemistryDynamic mechanical analysis021001 nanoscience & nanotechnologySettore ICAR/12 - Tecnologia Dell'Architettura0104 chemical scienceschemistryChemical engineeringSiloxane0210 nano-technologyCarbohydrate Polymers
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