Results 31 to 40 of about 105,813 (262)

Catalytic Pyrolysis of Spirulina platensis Residue (SPR): Thermochemical Behavior and Kinetics

International Journal of Technology, 2020
The pyrolysis characteristics of Spirulina platensis residue (SPR) with silica–alumina catalysts were investigated using thermogravimetric analysis (TGA).
Siti Jamilatun, Budhijanto, Rochmadi, Avido Yuliestyan, Muhammad Aziz, Jun-ichiro Hayashi, Arief Budiman   +6 more
doaj   +1 more source

Pre-exponential Factor in Semiconducting Vitamin A (Alcohol and Acetate) [PDF]

Bulletin of the Chemical Society of Japan, 1979
Abstract The semiconductive properties of vitamin A (alcohol and acetate) on adsorption of various vapors have been studied. The adsorbed vapors increase the semiconduction currents by several orders of magnitude and decrease the semiconduction activation energies.
Biswanath Mallik, Alpana Ghosh, T N Misra   +2 more
openaire   +1 more source

pre-exponential factor [PDF]

, 2014
Citation: 'pre-exponential factor' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.P04811 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Kinetic Analysis of Digestate Slow Pyrolysis with the Application of the Master-Plots Method and Independent Parallel Reactions Scheme

Molecules, 2019
The solid fraction obtained by mechanical separation of digestate from anaerobic digestion plants is an attractive feedstock for the pyrolysis process.
Pietro Bartocci, Roman Tschentscher, Ruth Elisabeth Stensrød, Marco Barbanera, Francesco Fantozzi   +4 more
doaj   +1 more source

Determination of Thermodynamic Parameters of Polylactic Acid by Thermogravimetry under Pyrolysis Conditions

Applied Sciences, 2021
In the present study, the thermodynamic parameters of Polylactic Acid (PLA) under conditions of thermal degradation were determined. The PLA material, previously sampled and characterized, was analyzed by dynamic thermogravimetry (TG) at heating rates of
Paul Palmay, Melissa Mora, Diego Barzallo, Joan Carles Bruno   +3 more
doaj   +1 more source

Deriving the Arrhenius Equation and the Pre-Exponential Factor

, 2023
Proposed in 1889 by Svante Arrhenius, the Arrhenius equation is an important result in physical chemistry which aims to find the relationship between temperature and reaction rates. It is also an essential equation for analytic chemistry which helps to determine the energy barrier for a given reaction.
openaire   +1 more source

Non-Isothermal Kinetic Analysis of the Dehydroxylation of Kaolinite in Dynamic Air Atmosphere

Acta Technologica Agriculturae, 2017
A non-isothermal kinetic analysis of kaolinite dehydroxylation was carried out using thermogravimetric analysis on powder samples with heating rates from 1 to 30 °C・min-1 in a dynamic air atmosphere.
Ondro Tomáš, Húlan Tomáš, Vitázek Ivan   +2 more
doaj   +1 more source

Kinetic Parameters of Biomass Pyrolysis by TGA

BioResources, 2016
Pyrolysis processes of typical biomass, such as corn stalk and birch chips, were investigated by thermogravimetric analysis (TGA). The apparent activation energy and pre-exponential factor were calculated with the adoption of the improved Coats-Redfern ...
Ming Zhai, Li Guo, Yu Zhang, Peng Dong, Guoli Qi, Yudong Huang   +5 more
doaj   +1 more source

Diffusion-weighted MRI for predicting pathologic response to neoadjuvant chemotherapy in breast cancer: evaluation with mono-, bi-, and stretched-exponential models

Journal of Translational Medicine, 2021
Background To investigate the performance of diffusion-weighted (DW) MRI with mono-, bi- and stretched-exponential models in predicting pathologic complete response (pCR) to neoadjuvant chemotherapy (NACT) for breast cancer, and further outline a ...
Shiteng Suo, Yan Yin, Xiaochuan Geng, Dandan Zhang, Jia Hua, Fang Cheng, Jie Chen, Zhiguo Zhuang, Mengqiu Cao, Jianrong Xu   +9 more
doaj   +1 more source

Thermal Degradation Kinetics of Natural Fibers: Determination of the Kinetic Triplet and Lifetime Prediction

Polysaccharides
Natural fibers have been widely employed in different fields as composite materials. However, the thermal behavior of natural materials is not fully understood since the chemical components chemically interact with each other.
Heitor Luiz Ornaghi, Maíra Faccio, Márcio Ronaldo Farias Soares   +2 more
doaj   +1 more source