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Abstract  

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 data.

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), and differential scanning calorimetry (DSC). Compared to TG analysis alone, which is only able to measure the total volatile as a single group, thermogravimetry–mass spectrometry (TG–MS) coupling technique is highly preferred [ 6 ], because TG–MS is

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Abstract  

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.

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level of flame retardancy. The effects of flame retardants on the main gaseous products of the thermal decomposition were analyzed by the thermogravimetry–mass spectrometry analysis, and the morphology of the char residue was also observed by a scanning

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], 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/mass spectrometry. Thermal behaviours of woody, non

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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–mass spectrometry analysis (TG–MS) is a

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Journal of Thermal Analysis and Calorimetry
Authors: Tomohito Kameda, Yuki Fubasami, and Toshiaki Yoshioka

·Mg–Al LDH by simultaneous thermogravimetry–mass spectrometry (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

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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.

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Abstract  

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.

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Abstract  

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.

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