Online coupled TG-FTIR and TG/DTA-MS analyses of the evolved gases from dichloro(thiourea) tin(II)

J. Madarász, P. Bombicz, Masayuki Okuya, Shoji Kaneko, G. Pokol

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Identification and monitoring of gaseous species released during thermal decomposition of title compound 1, dichloro(thiourea) tin(II), Sn(tu)Cl 2, [thiourea (tu), (NH2)2C = S] in flowing air atmosphere have been carried out by both online coupled TG-FTIR and simultaneous TG/DTA-MS evolved gas analysis (EGA) instruments. The first gaseous products of 1, evolved from 170 °C, are cyanamide (NH 2CN), carbonyl sulphide (COS), carbon disulfide (CS2) and water (H2O). At 240 °C isothiocyanic acid (HNCS) becomes the main product, accompanied by CS2, hydrogen cyanide (HCN) and traces of hydrogen chloride (HCl) according to EGA-FTIR analysis. Ammonia (NH 3) occurs first only above 250 °C, while sulfur dioxide (SO 2) formation is not observed till 400 °C. Air oxidation products of tin sulphides and organic residues, such as SO2, carbon dioxide (CO2) and NH2CN, occur suddenly at 425 °C together with a very sharp exothermic heat effect. All species identified by FTIR gas cells are confirmed by mass spectrometry, except HNCS. Evolution of H 2S has not been observed at any stage of the degradation of 1 by either of the EGA methods.

Original languageEnglish
Pages (from-to)577-581
Number of pages5
JournalSolid State Ionics
Volume172
Issue number1-4 SPEC. ISS.
DOIs
Publication statusPublished - Aug 31 2004

Fingerprint

Thiourea
Gas fuel analysis
gas analysis
Tin
Thioureas
thioureas
Differential thermal analysis
tin
thermal analysis
Gases
sulfides
products
Cyanamide
cyanamides
gases
Hydrogen Cyanide
Carbon Disulfide
Carbon disulfide
hydrocyanic acid
Sulfur Dioxide

Keywords

  • Coupled TG-EGA-FTIR
  • Coupled TG/DTA-EGA-MS
  • Evolved gas analysis
  • Simultaneous TG/DTA
  • Thiourea
  • Tin(II) chloride

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Online coupled TG-FTIR and TG/DTA-MS analyses of the evolved gases from dichloro(thiourea) tin(II). / Madarász, J.; Bombicz, P.; Okuya, Masayuki; Kaneko, Shoji; Pokol, G.

In: Solid State Ionics, Vol. 172, No. 1-4 SPEC. ISS., 31.08.2004, p. 577-581.

Research output: Contribution to journalArticle

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