Home |  English version |  Mappa |  Commenti |  Sondaggio |  Staff |  Contattaci Cerca nel sito  
Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2016

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Piezoelectric cr ystal microbalance measurements of enthalpy of sublimation of C2-C9 dicarboxylic acids

Anno di pubblicazione: 2016

Formato: Elettronico

Autori: F. Dirri , E. Palomba , A. Longobardo , and E. Zampetti

Affiliazioni autori: IAPS,IAPS,IAPS,CNR IIA

Autori CNR:

  • EMILIANO ZAMPETTI

Lingua: inglese

Abstract: We present here a novel experimental setup able to measure the enthalpy of sublimation of a given compound by means of Piezoelectric Crystal Microbalances (PCM). This experiment was performed in the TG-Lab facility in IAPS-INAF, dedicated to the development of TGA sensors for space measurements, such as detection of organic and non-organic volatile species and refractory materials in planetary environments. In order to study physical-chemical processes concerning the Volatile Organic Compounds (VOC) present in atmospheric environments, the setup has been tested on Dicarboxylic acids. Acids with low molecular weight are among the components of organic fraction of particulate matter in the atmosphere, coming from different sources (biogenic and anthropogenic). Considering their relative abundance, it is useful to consider Dicarboxylic acid as "markers" to define the biogenic or anthropogenic origin of the aerosol, thus obtaining some information of the emission sources. In this work, a temperature controlled effusion cell was used to sublimate VOC, creating a molecular flux that was collimated onto a cold PCM. The VOC re-condensed onto the PCM quartz crystal allowing the determination of the deposition rate. From the measurements of deposition rates, it was possible to infer the enthalpy of sublimation of Adipic acid, i.e. ? Hsub: 141.6 ± 0.8 kJmol-1 , Succinic acid, i.e. 113.3 ± 1.3 kJmol-1 , Oxalic acid, i.e. 62.5 ± 3.1 kJmol-1 and Azelaic acid, i.e. 124.2 ± 1.2 kJmol-1 (weight average values). The results obtained are in very good agreement with literature within 10 % for the Adipic, Succinic and Oxalic acid

Lingua abstract: inglese

Pagine da: 655

Pagine a: 668

Pagine totali: 14

Rivista:

Atmospheric measurement techniques Copernicus Publications
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 1867-1381

Numero volume: 9

DOI: 10.5194/amt-9-655-2016

Referee: Ś: Internazionale

Stato della pubblicazione: Published version

Parole chiave:

  • QCM
  • DUST
  • Space

URL: http://www.atmos-meas-tech.net/9/655/2016/

Strutture CNR:

Moduli:

 
Torna indietro Richiedi modifiche Invia per email Stampa
Home Il CNR  |  I servizi News |   Eventi | Istituti |  Focus