TGA/FTIR study of the pyrolysis of diammonium hydrogen phosphate–tobacco mixtures
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Title: | TGA/FTIR study of the pyrolysis of diammonium hydrogen phosphate–tobacco mixtures |
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Authors: | Marcilla, Antonio | Beltrán, Maribel | Gómez-Siurana, Amparo | Martínez Castellanos, Isabel | Berenguer Muñoz, Deseada | Pastor Matea, María Victoria | García, Angela N. |
Research Group/s: | Procesado y Pirólisis de Polímeros |
Center, Department or Service: | Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos |
Keywords: | DAP | Tobacco | Pyrolysis | TGA/FTIR | Additives |
Knowledge Area: | Ingeniería Química |
Issue Date: | Mar-2015 |
Publisher: | Elsevier |
Citation: | Journal of Analytical and Applied Pyrolysis. 2015, 112: 48-55. doi:10.1016/j.jaap.2015.02.023 |
Abstract: | Diammonium hydrogen phosphate (DAP) is commonly used as a flavor ingredient of commercial cigarettes. In addition, among its other uses, it is employed to expand the tobacco volume, to manufacture reconstituted tobacco sheet, and to denicotinize tobacco. However, the use of DAP as a cigarette ingredient is a controversial issue. Some authors have stated that ammonium compounds added to tobacco increase smoke ammonia and “smoke pH”, resulting in more free nicotine available in the smoke. On the other hand, other researchers have reported that the larger ammonium content of a cigarette blend due to the presence of DAP was not reflected in increased smoke ammonia. In this work, the thermal behavior of DAP, tobacco and DAP-tobacco mixtures has been studied by TGA/FTIR. The chemical processes involved in the different pyrolysis steps of DAP have been suggested. Marked changes in the pyrolytic behavior of both, tobacco and DAP have been detected when analyzing the behavior of the mixtures. A displacement of the decomposition steps mainly related to the glycerol and lignin from tobacco toward lower temperatures has been observed, whereas that associated with cellulose is displaced toward higher temperature. Additionally, no peak corresponding to the phosphorous oxides decomposition has been detected in the curves relating to the DAP-tobacco mixtures. All these features are indicative of the strong interactions between DAP and tobacco. The FTIR spectra show no significant qualitative differences between the qualitative overall composition of the gases evolved from the pyrolysis of tobacco in the absence and in the presence of DAP. Nevertheless, depending on the temperature considered, the addition of DAP contributes to a decrease in the generation of hydrocarbons and an increase in the formation of CO, CO2 and oxygenated compounds in terms of amount generated per mass of pyrolysed tobacco. |
Sponsor: | Financial support for this investigation has been provided by the Spanish “Comisión de Investigación Científica y Tecnológica” of the “Ministerio de Ciencia e Innovación” and the European Community (FEDER refunds) (CTQ2008-01023/PPQ and MAT2011-24991), and PROMETEO/2012/015. |
URI: | http://hdl.handle.net/10045/57957 |
ISSN: | 0165-2370 (Print) | 1873-250X (Online) |
DOI: | 10.1016/j.jaap.2015.02.023 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2015 Elsevier B.V. |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1016/j.jaap.2015.02.023 |
Appears in Collections: | INV - GTP3 - Artículos de Investigación sobre Procesado de Polímeros |
Files in This Item:
File | Description | Size | Format | |
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2015_Marcilla_JAAP_final.pdf | Versión final (acceso restringido) | 2,29 MB | Adobe PDF | Open Request a copy |
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