Authors:Erika Mészáros, Emma Jakab, G. Várhegyi, and P. Tóvári
The aim of this work was to study the thermal
decomposition of different plant species obtained from energy plantations.
Thermogravimetry/ mass spectrometry (TG/MS) experiments have been performed
with two herbaceous crops (Miscanthus sinensis,
pelletized energy grass) and two wood samples (willow, water locust) in inert
and oxidative atmospheres. Owing to the large number of data obtained in the
experiments, a chemometric tool, principal component analysis (PCA) has been
used to help the interpretation of the results. It has been found that the
thermal decomposition of the studied wood species is similar, whereas that
of the studied herbaceous samples exhibits significant differences. PCA has
been found to be useful for finding correlations between the various experimental
Authors:Wenxian Wei, Bingbing Cui, Xiaohong Jiang, and Ludu Lu
), and differential scanning calorimetry (DSC). Compared to TG analysis alone, which is only able to measure the total volatile as a single group, thermogravimetry–massspectrometry (TG–MS) coupling technique is highly preferred [ 6 ], because TG–MS is
Authors:Zongxue Yu, Yuxi Sun, Wenxian Wei, Lude Lu, and Xin Wang
Orthorhombic structural perovskite NdCrO3 nanocrystals with size of 60 nm were prepared by microemulsion method, and characterized by XRD, TEM, HRTEM, SEM, EDS and
BET. The catalytic effect of the NdCrO3 for thermal decomposition of ammonium perchlorate (AP) was investigated by DSC and TG-MS. The results revealed that the NdCrO3 nanoparticles had effective catalysis on the thermal decomposition of AP. Adding 2% of NdCrO3 nanoparticles to AP decreased the temperature of thermal decomposition by 87° and increased the heat of decomposition from
590 to 1073 J g−1. Gaseous products of thermal decomposition of AP were NH3, H2O, O2, HCl, N2O, NO, NO2 and Cl2. The mechanism of catalytic action was based on the presence of superoxide ion O2− on the surface of NdCrO3, and the difference of thermal decomposition of AP with 2% of NdCrO3 and pure AP was mainly caused by the different extent of oxidation of ammonium.
level of flame retardancy. The effects of flame retardants on the main gaseous products of the thermal decomposition were analyzed by the thermogravimetry–massspectrometry analysis, and the morphology of the char residue was also observed by a scanning
Authors:Zoltán Sebestyén, Ferenc Lezsovits, Emma Jakab, and Gábor Várhegyi
], which is a way to produce combustible volatile materials and char residue from natural products. In this study, biomass samples were measured under inert and oxidative atmospheres by thermogravimetry/massspectrometry. Thermal behaviours of woody, non
spectrometry analysis are employed to do the mechanism study.
Thermal analysis is a simple, convenient, fast and effective method for the study of pyrolysis and flame retardants [ 12 – 14 ]. The thermogravimetry–massspectrometry analysis (TG–MS) is a
Authors:Tomohito Kameda, Yuki Fubasami, and Toshiaki Yoshioka
·Mg–Al LDH by simultaneous thermogravimetry–massspectrometry (TG–MS). Additionally, we investigated the thermal decomposition of SO 4 ·Mg–Al LDH in air to determine the effect of temperature on the elimination behavior of sulfur oxides
The thermochemical reduction of a series of structurally and morphologically different natural and synthetic manganese(IV) oxides has been investigated. Measurements have been performed by means of combined thermogravimetry/mass spectrometry, X-ray diffraction and analytical scanning electron microscopy. The mechanisms of the degradation of these materials have been characterized in order to establish standardized procedures for their reactivity as function of structure, morphology and experimental conditions. The corresponding results are the fundament with respect to a reproducible technical application.
Authors:Elena Lizarraga, C. Zabaleta, and J. Palop
The thermal decomposition of a series of compounds has been studied by thermogravimetry, mass spectrometry, nuclear magnetic
resonance and elemental analysis. The combined use of mass spectrometry and thermogravimetry (MS and TG) in the analysis of
these compounds has allowed characterization of the fragmentation pattern which was the objective of this research. The gaseous
products, volatile condensed products and solid residues were identified by NMR and MS. Based on the product of thermal decomposition,
the mechanism of thermal decomposition has been derived.
Authors:F. López, A. Mercê, F. Alguacil, and A. López-Delgado
The thermal behaviour of chitosan was studied by means of thermogravimetry, mass spectrometry and infrared spectrometry. Kinetic
parameters were obtained by advanced kinetic evaluation (differential isoconversional analysis) from DSC curves, in non-isothermal
conditions, at several heating rates, between 5 and 30°C min−1. The results showed that the decomposition of chitosan does not follow a single mechanism because both the activation energy
and the pre-exponential factor are not constant during the course of the reaction. A comparison with the results obtained
by applying different conventional calculating methods is also shown.