An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
thermogravimetry, etc ; adsorbents; furnaces; gas chromatography; mass spectrometry; microplastics; spectrometers; Show all 7 Subjects
Abstract:
... Thermal Extraction-Desorption (TED) using a thermobalance coupled to a gas chromatograph (GC) with mass spectrometer (MS) detector is an extended method for polymers identification in complex matrixes. A new TED-GC/MS method for microplastics identification is developed in this study, where the whole filter with solids collected from water is thermal treated in a furnace, instead of using a small ...
thermogravimetry, etc ; activation energy; coal; combustion; energy; prediction; slags; surface area; Show all 8 Subjects
Abstract:
... Driven by the demand for accurate intrinsic kinetics for the prediction of the combustion rate of purely fired Zhundong coal (ZDC) in a slag tapping boiler, the surface activation function (SAF) and intrinsic kinetic parameters of two types of rapid-pyrolysis ZDC chars were revealed via the isothermal and nonisothermal thermogravimetric analysis methods. The isothermal kinetic results show that th ...
thermogravimetry, etc ; activation energy; information storage; neural networks; polyethylene; prediction; pyrolysis; weight loss; Show all 8 Subjects
Abstract:
... Pyrolysis is considered an attractive option and a promising way to dispose waste plastics. The thermogravimetric experiments of high-density polyethylene (HDPE) were conducted from 105 °C to 900 °C at different heating rates (10 °C/min, 20 °C/min, and 30 °C/min) to investigate their thermal pyrolysis behavior. We investigated four methods including three model-free methods and one model-fitting m ...
thermogravimetry, etc ; Fourier transform infrared spectroscopy; calorimeters; combustion; energy; mathematical models; prediction; pyrolysis; Show all 8 Subjects
Abstract:
... To predict the direct combustion of no-charring material, multiple pyrolysis gas components, which are closer to the real produced pyrolysis gases, are involved in the numerical simulation. The pyrolysis gas components are obtained by thermogravimetry coupled with fourier transform infrared spectroscopy experiments, and then several main components are chosen to be directly imported into the follo ...
thermogravimetry, etc ; aromatic compounds; carbon dioxide; coal; combustion; energy; intermediate product; sludge; synergism; Show all 9 Subjects
Abstract:
... In this work, the behaviors of municipal sludge/coal co-combustion were investigated by experiments and ReaxFF molecular dynamic simulations. The molecular models of coal and sludge were constructed based on experimental characterization. The characteristics of the separately combustion of sludge and coal from ReaxFF MD simulations were consistent with that from thermostatic thermogravimetric expe ...
thermogravimetry, etc ; Fourier transform infrared spectroscopy; Methanobacterium; Methanosarcina; anaerobic digestion; community structure; methane; methane production; methanogens; microalgae; microbial communities; sewage sludge; China; Show all 13 Subjects
Abstract:
... To improve methane production from sewage sludge (SS), co-digestion of SS and microalgae (MA) was studied and the application of thermo-alkaline pretreatment to MA was evaluated. The results showed that thermo-alkaline pretreatment at 90°C for 120 min on MA was the optimum pretreatment condition. Furthermore, when the volatile solids (VS) ratio of SS and MA was 1:2, the methane yield reached maxim ...
thermogravimetry, etc ; Aspergillus carbonarius; Aspergillus niger; Ocimum basilicum; Ocimum gratissimum; electron microscopy; food chemistry; fruits; fungal contamination; nanofibers; ochratoxin A; shelf life; Show all 12 Subjects
Abstract:
... Apergillus carbonarius and Aspergillus niger are the principal fungi that attack table grapes, and they are responsible for producing and contaminating these fruits with ochratoxin A. Packaging containing essential oils from Ocimum gratissimum L. and Ocimum basilicum L. encapsulated in poly(lactic acid) (PLA) nanofibers were produced, the antifungal and antiocratoxigenic activities against A. carb ...
thermogravimetry, etc ; Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray photoelectron spectroscopy; carbon; chemical species; heat treatment; soot; spectrometers; temperature; thermodynamics; China; Show all 12 Subjects
Abstract:
... The thermal deactivation of diesel soot particles exerts a significant influence on the control strategy for the regeneration of diesel particulate filters (DPFs). This work focused on the changes in the surface functional groups, carbon chemical state, and graphitization degree during thermal treatment in an inert gas environment at intermediate temperatures of 600°C, 800°C, and 1000°C and explor ...
... In this study, shell-core fibers were successfully prepared by using Eudragit S100 (ES100) and poly(vinyl alcohol) (PVA)/pectin (PEC) through coaxial electrospinning technology. The electrospun fiber was characterized by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD). Thermo-gravimetric analysis (TGA) showed that the coaxial electrospun ...
thermogravimetry, etc ; Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; azo dyes; catalysts; electron paramagnetic resonance spectroscopy; energy-dispersive X-ray analysis; hot water treatment; hybrids; magnetism; mass spectrometry; pH; pollution; reaction mechanisms; temperature; wastewater; China; Show all 18 Subjects
Abstract:
... Wastewater containing an azo dye Orange G (OG) causes massive environmental pollution, thus it is critical to develop a highly effective, environmental-friendly, and reusable catalyst in peroxymonosulfate (PMS) activation for OG degradation. In this work, we successfully applied a magnetic MnFe₂O₄/α-MnO₂ hybrid fabricated by a simple hydrothermal method for OG removal in water. The characteristics ...
thermogravimetry, etc ; coal; combustion; energy; torrefaction; Show all 5 Subjects
Abstract:
... This study investigated the influence of torrefaction (300 °C) on the combustion performances of blends of biomass-plastic wastes (Mango branches (MBr), newspaper (Np), LDPE) using thermogravimetric analysis. The torrefied waste blends were co-combusted with coal at a blending ratio of 25 and 50 wt. % to identify possible interactions between the fuels’ components. Synergistic behaviours were note ...
thermogravimetry, etc ; calcium oxide; pyrolysis; reaction mechanisms; Show all 4 Subjects
Abstract:
... Green and sustainable treatment of waste plastics emerged as one of the greatest challenging matters facing the world. In this work, the pyrolysis of chlorine-contained PVC plastics was investigated from a kinetic study perspective. The dual effects of calcium oxide (CaO) additive were examined. The Fraser-Suzuki deconvolution function was adopted to fit the differential thermogravimetric (DTG) cu ...
thermogravimetry, etc ; archaeology; collagen; humans; hydroxyapatite; spectroscopy; Show all 6 Subjects
Abstract:
... In this study, we evaluate whether thermogravimetric analysis (TGA) can be used to estimate the amounts of collagen and hydroxyapatite in archaeological bone accurately and rapidly, through evaluation of twenty-four previously analyzed archaeological human bone samples. Mass losses in the approximate ranges of 300–500 °C, 220–600 °C, and 600–900 °C, correspond to collagen mass loss, total organic ...
thermogravimetry, etc ; antimony; microstructure; nanocrystals; pH; zeolites; Show all 6 Subjects
Abstract:
... Hydrothermal deposition is an ideal method to fabricate high-efficiency antimony sulfoselenide (Sb₂(S,Se)₃) solar cells due to its simple, eco-friendly and low-cost processing characteristics. This deposition approach has enabled efficiency breakthrough in Sb₂(S,Se)₃ solar cells, while the chemical mechanisms in the deposition and annealing processes remain undiscovered. Here, we reveal that the d ...
thermogravimetry, etc ; combustion; energy; oxygen; particle size; Show all 5 Subjects
Abstract:
... Understanding reactive behaviors and mechanisms of oxygen carriers (OCs) is a key issue in chemical looping combustion (CLC), which can provide ideas and routes not only for constructing high-performance OCs, but also for designing reactors and systems intensification. However, various points about the reaction behaviors and oxygen release mechanism of iron/cobalt-doped nickel-based OCs in CLC rem ...
José Luiz Francisco Alves; Jean Constantino Gomes da Silva; Guilherme Davi Mumbach; Ricardo Francisco Alves; Rennio Felix de Sena; Ricardo Antonio Francisco Machado; Cintia Marangoni
thermogravimetry, etc ; Acrocomia; bioenergy; endocarp; feedstocks; models; pyrolysis; Show all 7 Subjects
Abstract:
... This work provides the first insights on the bioenergy potential of macauba endocarp (Acrocomia aculeate) based on the pyrolysis kinetics and thermodynamic parameters of activation. The kinetic triplet was obtained from non-isothermal thermogravimetric data by using four isoconversional methods, kinetic compensation effect, and master-plots method. The pyrolysis behavior of macauba endocarp was mo ...
thermogravimetry, etc ; environment; explosives; fearfulness; risk; thermal properties; Show all 6 Subjects
Abstract:
... Millions of tonnes of dumped ammunition and explosive remnants of war remain in nature both on land and at sea. It is well known that the ordnance could represent a definite explosive risk if disturbed, and that some of the constituents in the ammunition could be harmful to humans and the environment. Nevertheless, a tacit assumption by decision makers is that, if left alone, the ammunition will s ...
thermogravimetry, etc ; biomass; carbon; hydrogen; microstructure; porosity; technology; Show all 7 Subjects
Abstract:
... Application of biomass embedded self-reducing pellets (SRP) in the Hydrogen direct reduction (H-DR) process is expected to solve the problem of low/zero carbon content in the DRI product of H-DR. In this study, reduction of biomass embedded SRP by N₂/H₂/CO at different temperatures was conducted by using Thermogravimetric/Differential Thermal Analyzer (TG/DTA), Scanning electron microscopy (SEM) w ...
thermogravimetry, etc ; feedstocks; formaldehyde; injection molding; oxygen; polymers; Show all 6 Subjects
Abstract:
... When polyoxymethylene (POM)—a common polymer used in metal injection moulding feedstock—is exposed to heat and oxygen during compounding, it can be easily decomposed, releasing undesired gaseous formaldehyde products. In order to reduce the formaldehyde emission from POM, amine treatment was performed. The effectiveness of propylamine at different concentrations and its role as a formaldehyde scav ...
thermogravimetry, etc ; calorimeters; combustion; enthalpy; sublimation; temperature; theophylline; Show all 7 Subjects
Abstract:
... The molar standard (p°=0.1 MPa) enthalpies of formation at T = 298.15 K of theophylline, theophylline-7-acetic acid, 7-(β-hydroxyethyl) theophylline and 7-(2,3-dihydroxypropyl) theophylline, in the crystalline phase, were derived from the respective massic standard energies of combustion, determined experimentally in a static bomb combustion calorimeter. The molar standard enthalpies of formation ...