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Pitkänen, Ilkka; Huttunen, Jetta; Halttunen, H.; Vesterinen, Raili

doi:10.1023/a:1010185818746

Cited by 45 publications

(14 citation statements)

References 15 publications

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“…These experiments involved heating the sample at a rate of 15 K min -1 up to 1273 K under a flow rate of 50 mL min -1 of Ar. Thermogravimetric analysis combined with FTIR spectroscopy provides information regarding mass changes in a sample and allows the qualitative identification of the gases evolved during thermal degradation [26].…”

Section: Thermogravimetric Studymentioning

confidence: 99%

Application of thermogravimetric analysis to the evaluation of aminated solid sorbents for CO2 capture

Plaza

Pevida

Arias

et al. 2008

J Therm Anal Calorim

156

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In this work a series of solid sorbents were synthesized by immobilizing liquid amines on the surface of a mesoporous alumina. The samples were chemically characterized and BET surface areas calculated from the N 2 adsorption isotherms at 77 K. The CO 2 capture performance of the sorbents and their thermal stability was studied by thermogravimetric methods. The effect of amine loading on the CO 2 capture performance of the prepared sorbents was also evaluated. Analysis of TG-DTG curves showed that thermal stabilization of the amines is significantly improved by immobilizing them on an inorganic support. Temperature-programmed CO 2 adsorption tests from 298 K up to 373 K at atmospheric pressure, proved to be a useful technique for assessing the capacity of sorbents for CO 2 capture. Alumina impregnated with diethylentriamine presented the highest CO 2 adsorption capacities throughout the tested temperature range.

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Section: Thermogravimetric Studymentioning

confidence: 99%

Application of thermogravimetric analysis to the evaluation of aminated solid sorbents for CO2 capture

Plaza

Pevida

Arias

et al. 2008

J Therm Anal Calorim

156

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“…The interferences of other fragments in m/z signals 27 and 30 have been taken into account and subtracted [18]. The formation of NO in a reducing environment can be justified by the presence of oxygen in the PVP composition, as in coals, where NO has also been detected [18][19][20][21][22]. The fact that the detection of HCN and NO by FTIR is negligible, is surely due to the lower sensitivity of the equipment compared to the MS.…”

Section: Characterisation Of the Individual Model Compoundsmentioning

confidence: 99%

Characterisation of model compounds and a synthetic coal by TG/MS/FTIR to represent the pyrolysis behaviour of coal

Arenillas

Pevida

Rubiera

et al. 2004

Journal of Analytical and Applied Pyrolysis

112

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Coal pyrolysis is the initial, accompanying reaction of a number of coal conversion processes such as hydrogenation, combustion and gasification. However, because of the inherent complexity of coal composition, it is difficult to describe coal pyrolysis clearly. Single model compounds have been used before in order to provide additional insight into the complex processes that occur in the pyrolysis of coal. Yet the picture obtained is a simplified one and certain important aspects such as coal structure, interactions between different surface groups and cross-links are omitted. The approach used in this work involves the preparation of a synthetic coal, SC, with a known structure by curing a mixture of single, well-defined model compounds. By means of chemical characterisation, the SC was shown to contain the macroscopic features of a high volatile coal (proximate and ultimate analyses). FTIR characterisation revealed the presence of functional groups similar to those of coal in the structure of the SC. Temperature-programmed pyrolysis tests were performed in a thermobalance linked to a mass spectrometer and a Fourier transform infrared analyser (TG/MS/FTIR). The thermal behaviour of the synthetic coal (i.e., rate of mass loss and the evolution profiles of gaseous compounds during pyrolysis tests) is very similar to that of the high volatile bituminous coal which was used as a reference material. The great advantage of using SC lies in the fact that its composition and structure can be accurately determined and employed in subsequent applications in basic and mechanistic studies.

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“…6a and b shows the integration of area corresponding to carbonyl stretching (C O) and C-O stretching. The C O stretching at around 1800 cm −1 is a characteristic peak of acetic acid and C-O at 1050 cm −1 may correspond to an alcohol [23,24]. Fig.…”

Section: Tga-ftir Analysismentioning

confidence: 99%

“…Spectra B and C are slightly different to spectrum A as they contain an extra adsorption band at 1035-1065 cm −1 . This adsorption band is attributed to C-O stretching of an alcohol [23]. The presence of alcohol may be from ethanol which is derived from thermal decomposition of ethyl ester phosphoramidate flame retardants.…”

Section: Tga-ftir Analysismentioning

confidence: 99%