Results 21 to 30 of about 151,251 (265)

The kinetics of sulfation of calcium oxide [PDF]

, 1989
The rate of sulfation of a CaO surface is rapid at first, limited by the intrinsic kinetics, but slows down with increasing conversion as a consequence of the increased resistance to diffusion through the product layer. The objectives of this study are to determine the intrinsic kinetics and the product layer diffusion pate by minimizing the ...
Sarofim, A. F., Longwell, J. P.
openaire   +9 more sources

The kinetics of the hydrogen chloride oxidation

Journal of the Serbian Chemical Society, 2013
Hydrogen chloride (HCl) oxidation has been investigated on technical membrane electrode assemblies in a cyclone flow cell. Influence of Nafion loading, temperature and hydrogen chloride mole fraction in the gas phase has been studied. The apparent kinetic parameters like reaction order with respect to HCl, Tafel slope and activation energy ...
González Martinez, I., Vidaković-Koch, T. ; https://orcid.org/0000-0003-3896-3585, Kuwertz, R., Turek, T., Kunz, U., Sundmacher, K. ; https://orcid.org/0000-0003-3251-0593   +5 more
openaire   +3 more sources

Proposal of new oxidation kinetics for sponge base E110 cladding tubes material

EPJ Nuclear Sciences & Technologies, 2017
Study of high temperature steam oxidation kinetics during the high temperature oxidation was carried out on the sponge base E110 cladding tubes material in the temperature range 600–1300 °C.
Krejčí Jakub, Vrtílková Věra, Gajdoš Pavel, Rada David   +3 more
doaj   +1 more source

Comparative kinetics of molybdenum disulfide oxidation in sodium hypochlorite and nitric acid solutions [PDF]

E3S Web of Conferences
The oxidation reaction’s kinetics of synthetic MoS2 and molybdenum industrial intermediate products (containing 38% MoS2) in solutions of concentrated nitric acid were investigated earlier.
Safarov Edgor, Rasulova Sitorabonu, Guro Vitaliy, Adinaev Khayitali, Rakhmatkarieva Firuza, Ruziyev Ulugbek, Abdullaev Farkhod   +6 more
doaj   +1 more source

Oxidation study of CoCrCuFeNiSix high entropy alloys

Materials Research Express, 2020
Oxidation studies of Co–Cr–Cu–Fe–Ni–Si _X=(0,0.3,0.6,0.9) high entropy alloys (HEA) at 600, 700 and 800 °C for 30 h are performed in the present work.
Shaik Shajahan, Anil Kumar, Manoj Chopkar, A Basu   +3 more
doaj   +1 more source

Estudo da dissolução oxidativa microbiológica de uma complexa amostra mineral contendo pirita (FeS2), Pirrotita (Fe1-xS) e Molibdenita (MoS2) Microbiological oxidative dissolution of a complex mineral sample containing pyrite (FeS2), pyrrotite (Fe1-xS) and molybdenite (MoS2)

Química Nova, 2007
This work aims to study the oxidation of a complex molybdenite mineral which contains pyrite and pyrrotite, by Acidithiobacillus ferrooxidans. This study was performed by respirometric essays and bioleaching in shake flasks.
Wilmo E. Francisco Jr, Denise Bevilaqua, Oswaldo Garcia Jr   +2 more
doaj   +1 more source

Kinetics and mechanism of As2S2 oxidation [PDF]

Journal of the Serbian Chemical Society, 2005
The kinetics of realgar (As2S2) oxidation was studied under isothermal and non-isothermal conditions. The obtained values of the activation energy indicate that the process occurs in the kinetic domainwith the realgar particles being converted to As2O3 ...
IVAN N. MIHAJLOVIC, NADA D. STRBAC, ZIVAN D. ZIVKOVIC, ILIJA ILIC   +3 more
doaj   +3 more sources

Photoinduced Absorption Spectroscopy of Photoelectrocatalytic Methylene Blue Oxidation on Titania and Hematite: The Thermodynamic and Kinetic Impacts on Reaction Pathways

Advanced Science, 2023
Photoelectrochemical oxidation of methylene blue is investigated, with particular focus on the difference in kinetics and thermodynamics of decoloration and mineralization employing photoinduced absorption spectroscopy.
Xinyue Guo, Zixuan Ma, Yuling Yuan, Yan Kang, Hong Xu, Zhiping Mao, Yimeng Ma   +6 more
doaj   +1 more source

KINETICS OF THE OXIDATION OF VITAMIN C

Indonesian Journal of Chemistry, 2012
Vitamin C or ascorbic acid is needed by the human body but it is already damaged by the rise in temperature due to be oxidized to L-dehydroascorbic acid.
Sitti Rahmawati, Bunbun Bundjali
doaj   +1 more source

Structural insight into polyphenol oxidation during black tea fermentation

Food Chemistry: X, 2023
Polyphenol oxidation during fermentation plays a critical role in the formation of flavor and function of black tea. However, how the specific structures of tea polyphenols affect their oxidation kinetics during black tea fermentation is still unknown ...
Lin Chen, Huajie Wang, Yang Ye, Yuefei Wang, Ping Xu   +4 more
doaj   +1 more source