Thermogravimetric Analysis

Bottom, R.

doi:10.1002/9780470697702.ch3

Cited by 44 publications

(22 citation statements)

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“…This reflects that BC possessed the highest thermal stability compared to plant cellulose (Cheng et al, 2009). Additionally, the TGA curve of BC showed a typical decomposition curve of pure compound where only one step of decomposition was observed (Bottom, 2008). Thus this result had indicated the purity of BC produced by A.xylinum 0416.…”

Section: Swelling Propertiesmentioning

confidence: 52%

Characterization of bacterial cellulose produced via fermentation of acetobacter xylinum 0416

Zahan¹,

Anuar

Pa’e

et al. 2017

Int. j. adv. appl. sci

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The production of plant-based cellulose products had contributed to the increasing rate of deforestation activities. Bacterial cellulose (BC) produced via fermentation process can be considered as an alternative. In this study, BC was produced by fermentation of Acetobacter xylinum 0416 and further analyzed to determine its physiochemical properties. The characterization of the BC was carried out through fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM), thermogravimetric analysis (TGA), pH, moisture content, compressibility index and swelling properties. Then, it was compared with plant-based cellulose products which are carboxymethyl cellulose (CMC) and cellulose powder (CP). FTIR analysis demonstrated the similar properties between BC, CMC and CP while FESEM depicted a smoother surface and nanostructure of the BC. The TGA analysis indicated that BC has the highest thermal stability compared to CMC and CP. The other characterization results showed that BC displayed promising properties compared to CMC and CP. These findings further support the potential of substituting the use of plant-based cellulose products in the market with BC produced by A.xylinum 0416.

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Section: Swelling Propertiesmentioning

confidence: 52%

Characterization of bacterial cellulose produced via fermentation of acetobacter xylinum 0416

Zahan¹,

Anuar

Pa’e

et al. 2017

Int. j. adv. appl. sci

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“…The experimental conditions applied in TGA (heating rate, atmospheric conditions, sample mass, and maximum temperature) affect the thermal behaviour of the sample and should be consciously selected ( Bottom, 2008 ; Haines, 2002 ). The selection of experimental conditions depends on sample characteristics, such as particle size, calorific content, inorganic content, impurities, and chemical composition ( Heal, 2002 ).…”

Section: Tga Of Wdmmentioning

confidence: 99%

“…Increased heating rates result in higher decomposition temperatures and higher rates of mass loss due to the changes in activation energy and/or different heat dissipation rates ( Conesa and Rey, 2015 ; Lin et al, 1999 ; Park et al, 2012 ; Quan et al, 2016 ; Yang et al, 2001 ; Yurdakul and Atimtay, 2015 ). High heating rates can lead to significant overlapping effects between the heating profiles of the components contained in the sample resulting in interpretation problems of the results, for example, in a mixture of plastics that contains polymers with similar ranges of decomposition temperature ( Bottom, 2008 ; Luo et al, 2018 ; Marsh et al, 2007 ). But, too low heating rates are time consuming ( Bottom, 2008 ; Heal, 2002 ).…”

Section: Tga Of Wdmmentioning

confidence: 99%

“…High heating rates can lead to significant overlapping effects between the heating profiles of the components contained in the sample resulting in interpretation problems of the results, for example, in a mixture of plastics that contains polymers with similar ranges of decomposition temperature ( Bottom, 2008 ; Luo et al, 2018 ; Marsh et al, 2007 ). But, too low heating rates are time consuming ( Bottom, 2008 ; Heal, 2002 ). Figure 3 shows that nearly 55% of total TGA experiments of WDM was conducted using a heating rate of 10°C min −1 or less, with a view to obtaining a comparatively better resolution of the decomposition profile of the samples.…”

Section: Tga Of Wdmmentioning

confidence: 99%

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Characterisation and composition identification of waste-derived fuels obtained from municipal solid waste using thermogravimetry: A review

et al. 2020

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Thermogravimetric analysis (TGA) is the most widespread thermal analytical technique applied to waste materials. By way of critical review, we establish a theoretical framework for the use of TGA under non-isothermal conditions for compositional analysis of waste-derived fuels from municipal solid waste (MSW) (solid recovered fuel (SRF), or refuse-derived fuel (RDF)). Thermal behaviour of SRF/RDF is described as a complex mixture of several components at multiple levels (including an assembly of prevalent waste items, materials, and chemical compounds); and, operating conditions applied to TGA experiments of SRF/RDF are summarised. SRF/RDF mainly contains cellulose, hemicellulose, lignin, polyethylene, polypropylene, and polyethylene terephthalate. Polyvinyl chloride is also used in simulated samples, for its high chlorine content. We discuss the main limitations for TGA-based compositional analysis of SRF/RDF, due to inherently heterogeneous composition of MSW at multiple levels, overlapping degradation areas, and potential interaction effects among waste components and cross-contamination. Optimal generic TGA settings are highlighted (inert atmosphere and low heating rate (⩽10°C), sufficient temperature range for material degradation (⩾750°C), and representative amount of test portion). There is high potential to develop TGA-based composition identification and wider quality assurance and control methods using advanced thermo-analytical techniques (e.g. TGA with evolved gas analysis), coupled with statistical data analytics.

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“…5,11 However, TG measurements are destructive, ex situ, and they cannot be carried out under reaction conditions. 12 Therefore, in this work, a radio-frequency (RF)-based method to determine the thermal stability with regard to the decomposition of the IL is presented. This method has already been successfully applied to determine the coke loading of heterogeneous catalysts 13,14 as well as to measure quantitatively the ammonia sorption of SCR catalysts.…”

Section: Introductionmentioning

confidence: 99%

Operando Determination of the Thermal Decomposition of Supported Ionic Liquids by a Radio-Frequency-Based Method

et al. 2019

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The analysis of the thermal stability of supported ionic liquids (ILs) is of great interest for their application in catalysis. However, thermogravimetric (TG) measurements are very time-consuming, destructive, and cannot be conducted operando. Therefore, a new radio-frequency (RF)-based method is presented that analyzes the electrical properties of supported ILs in the microwave range and can detect a possible IL mass loss caused by evaporation or decomposition. In this study, the decomposition of supported 1-butyl-3-methylimidazolium dimethylphosphate ([BMIM][DMP]) with and without palladium (as an active metal) is investigated operando during the selective hydrogenation of 1,3-butadiene. In addition to volatile decomposition products, solid products are formed, which remain on the carrier. These solid products impair the activity of the Pd catalyst. Using the RF-based method, a distinction can be made between “intact” IL and the solid decomposition products because the electrical properties of both substances differ substantially. In contrast, the destructive TG analysis only measures the mass loss by the formation of gaseous decomposition products and thus cannot distinguish between “intact” IL and the solid decomposition products of [BMIM][DMP]. In addition, a model of the thermal decomposition which depicts the measured mass losses well is presented.

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Thermogravimetric Analysis

Cited by 44 publications

References 0 publications

Characterization of bacterial cellulose produced via fermentation of acetobacter xylinum 0416

Characterization of bacterial cellulose produced via fermentation of acetobacter xylinum 0416

Characterisation and composition identification of waste-derived fuels obtained from municipal solid waste using thermogravimetry: A review

Operando Determination of the Thermal Decomposition of Supported Ionic Liquids by a Radio-Frequency-Based Method

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