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DETERMINATION OF LINEAR ANDY CYCLIC VOLATILE METHYL SILOXANES IN BIOGAS AND BIOMETHANE BY SOLID-PHASE

DETERMINATION OF LINEAR ANDY CYCLIC VOLATILE METHYL SILOXANES IN BIOGAS AND BIOMETHANE BY SOLID-PHASE

BIBLIOTECA - Trabalhos Acadêmicos
  • 3 horas de carga horária
  • 1 aula
  • 1 módulo de conteúdo
  • Última atualização 29/06/2023
  • 1 arquivo para download

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TÍTULO

DETERMINATION OF LINEAR AN CYCLIC VOLATILE METHYL SILOXANES IN BIOGAS AND BIOMETHANE BY SOLID-PHASE MICROEXTRACTION AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY


DOCUMENTO - ARTIGO CIENTÍFICO 


AUTORES - MICHELE GHIDOTTI, DANIELE FABBRI, CRISTIAN TORRI


RESUMO/ABSTRACT

A new method based on solid-phase microextraction (SPME) followed by gas chromatography-mass spectrometry (GC-MS) was developed for the analysis of seven linear (L2 – L5) and cyclic (D3 – D5) volatile methyl siloxanes (VMS) in biogas and biomethane, directly collected into Tedlar® bags (Tedlar SPME) from anaerobic digesters and wastewater treatment plants. The method was employed to monitor VMS content in biomethane produced by biogas upgrading with a pilot-plant membrane unit and provided adequate limits of quantification (< 0.05 mg m−3) to detect trace siloxane impurities. Tedlar SPME was validated against a standard procedure based on indirect sampling of gas streams with sorbent tubes followed by solvent extraction and GC-MS. Method precision (RSD) on total and individual VMS concentrations was lower than 10%, while RSD values of the standard procedure were higher than 20%. Tedlar SPME suitably revealed high VMS levels, expressed as total volatile silicon (> 1 mgSim−3), in wastewater biogas and provided a more efficient sampling of heavier VMS in comparison to the sorbent tubes method. At low values (< 0.1 mgSim−3) typical of wood waste biogas and biomethane, no statistically significant differences were observed between the two methods. Overall, Tedlar SPME simplified the analytical procedure by reducing the procedural steps, avoiding the use of solvents and demonstrated its applicability for testing the quality of biomethane as advanced biofuel. 

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Profissionais, estudantes e interessados na cadeia do biogás e, atuantes nas diversas áreas, etapas de projetos ou operação na produção de biogás.

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  • DETERMINATION OF LINEAR AN CYCLIC VOLATILE METHYL SILOXANES IN BIOGAS AND BIOMETHANE BY SOLID-PHASE MICROEXTRACTION AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY

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DETERMINATION OF LINEAR ANDY CYCLIC VOLATILE METHYL SILOXANES IN BIOGAS AND BIOMETHANE BY SOLID-PHASE

  • 3 horas de carga horária
  • 1 aula
  • 1 módulo de conteúdo
  • Última atualização 29/06/2023
  • 1 arquivo para download

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