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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2016

Contributo in rivista

Tipo: Traduzione in rivista

Titolo: Measuring Enthalpy of Sublimation of Volatiles by Means of Piezoelectric Crystal Microbalances

Anno di pubblicazione: 2016

Formato: Elettronico Cartaceo

Autori: Fabrizio Dirri Ernesto Palomba Andrea Longobardo Emiliano Zampetti


Autori CNR:


Lingua: inglese

Abstract: Piezoelectric Crystal Microbalances (PCM's) are widely used to study the chemical processes involving volatile compounds in any environment, such as condensation process. Since PCM's are miniaturized sensor, they are very suitable for planetary in situ missions, where can be used to detect and to measure the mass amount of astrobiologically significant compounds, such as water and organics. This work focuses on the realization and testing of a new experimental setup, able to characterize volatiles which can be found in a planetary environment. In particular the enthalpy of sublimation of some dicarboxylic acids has been measured. The importance of dicarboxylic acids in planetology and astrobiology is due to the fact that they have been detected in carbonaceous chondritic material (e.g. Murchinson), among the most pristine material present in our Solar System. In this work, a sample of acid was heated in an effusion cell up to its sublimation. For a set of temperatures (from 30 °C to 75 °C), the deposition rate on the PCM surface has been measured. From these measurements, it has been possible to infer the enthalpy of sublimation of Adipic acid, i.e. ?H = 141.6 ± 0.8 kJ/mol and Succinic acid, i.e. ?H = 113.3 ± 1.3 kJ/mol. This technique has so demonstrated to be a good choice to recognise a single compound or a mixture (with an analysis upstream) even if some improvements concerning the thermal stabilization of the system will be implemented in order to enhance the results' accuracy. The experiment has been performed in support of the VISTA (Volatile In Situ Thermogravimetry Analyzer) project, which is included in the scientific payload of the ESA MarcoPolo-R mission study

Lingua abstract: inglese

Pagine da: 1

Pagine a: 12

Pagine totali: 12


Origins of life and evolution of the biosphere Kluwer
Paese di pubblicazione: Paesi Bassi
Lingua: inglese
ISSN: 1573-0875

DOI: 10.1007/s11084-016-9517-y

Referee: Ś: Internazionale

Stato della pubblicazione: Published version

Parole chiave:

  • Enthalpy of sublimationDicarboxylic acid
  • Piezoelectric crystal microbalances
  • Planetary in-situ mission

URL: http://link.springer.com/article/10.1007/s11084-016-9517-y

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