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EnglishIn setting up analytical procedures, sample preparation is a common step which may require the use of toxic or corrosive substances with potential environmental and health hazard. Analytical pyrolysis (Py) coupled with GC-MS is a solventless technique requiring minimal sample preparation and reagent use. Methods based on Py/GC-MS have been developed with a higher degree of “greenness” in comparison to wet analysis (1). Py/GC-MS has been largely applied to the characterisation of complex and heterogeneous macromolecules deriving from the thermal and environmental degradation of biopolymers. Therefore, it represents a valid approach to study the liquid deriving from the thermochemical conversion of biomass (bio-oil) finalised to the production of biofuels and new chemicals (2). However, conventional Py/GC-MS is flawed by several factors (e.g. mass transfer, aerosol formation, memory effects) limiting its ability to provide an overall picture of the molecular composition of bio-oil without the aid of laborious solvent fractionation procedures. To the end of improving Py/GCMS, we have developed a new approach based on SPME sampling of pyrolysis products evolved from the sample heated at sequentially increasing temperatures (stepwise). Stepwise Py/SPME/GC-MS has been applied to the characterisation of complex bio-oils obtained from the thermochemical treatment of microalgae (3). We have now demonstrated that the method can be combined with on-fiber derivatisation expanding its potential to the analysis of polar constituents, such as thermal degradation products of polysaccharide and proteins.
| Titolo: | Applications of Analytical Pyrolysis to the Development of Fuels and Chemicals from Biomass |
| Autore/i: | FABBRI, DANIELE; TORRI, CRISTIAN |
| Autore/i Unibo: | |
| Anno: | 2012 |
| Titolo del libro: | XXIII Congresso Nazionale della Divisione di Chimica Analitica della Società Chimica Italiana |
| Pagina iniziale: | 86 |
| Pagina finale: | 86 |
| Abstract: | In setting up analytical procedures, sample preparation is a common step which may require the use of toxic or corrosive substances with potential environmental and health hazard. Analytical pyrolysis (Py) coupled with GC-MS is a solventless technique requiring minimal sample preparation and reagent use. Methods based on Py/GC-MS have been developed with a higher degree of “greenness” in comparison to wet analysis (1). Py/GC-MS has been largely applied to the characterisation of complex and heterogeneous macromolecules deriving from the thermal and environmental degradation of biopolymers. Therefore, it represents a valid approach to study the liquid deriving from the thermochemical conversion of biomass (bio-oil) finalised to the production of biofuels and new chemicals (2). However, conventional Py/GC-MS is flawed by several factors (e.g. mass transfer, aerosol formation, memory effects) limiting its ability to provide an overall picture of the molecular composition of bio-oil without the aid of laborious solvent fractionation procedures. To the end of improving Py/GCMS, we have developed a new approach based on SPME sampling of pyrolysis products evolved from the sample heated at sequentially increasing temperatures (stepwise). Stepwise Py/SPME/GC-MS has been applied to the characterisation of complex bio-oils obtained from the thermochemical treatment of microalgae (3). We have now demonstrated that the method can be combined with on-fiber derivatisation expanding its potential to the analysis of polar constituents, such as thermal degradation products of polysaccharide and proteins. |
| Data prodotto definitivo in UGOV: | 26-giu-2013 |
| Appare nelle tipologie: | 4.02 Riassunto (Abstract) |
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