Modelling the kinetics and structural property evolution of a versatile reaction: aqueous HCN polymerization

2018 ◽  
Vol 20 (25) ◽  
pp. 17353-17366 ◽  
Author(s):  
Amparo Fernández ◽  
Marta Ruiz-Bermejo ◽  
José L. de la Fuente
Keyword(s):  
Structural Property ◽  
Structural Characterization ◽  
Precipitation Polymerization ◽  
Autocatalytic Model ◽  
Kinetics Of

The structural characterization and kinetics of HCN polymers were studied and the Kamal autocatalytic model can describe this aqueous precipitation polymerization.

Kinetics of Glycerol Biotransformation to Dihydroxyacetone by Immobilized Gluconobacter oxydans and Effect of Reaction Conditions

2007 ◽  
Vol 72 (9) ◽  
pp. 1269-1283 ◽  
Author(s):  
Jiří Raška ◽  
František Skopal ◽  
Karel Komers ◽  
Jaroslav Machek
Keyword(s):  
Yeast Extract ◽  
Batch Reactor ◽  
Gluconobacter Oxydans ◽  
Poly Vinyl Alcohol ◽  
Glycerol Concentration ◽  
Reaction Conditions ◽  
Extract Concentration ◽  
Autocatalytic Model ◽  
Kinetics Of ◽  
Reaction Schemes

Biotransformation of glycerol to 1,3-dihydroxyacetone was carried out in an isothermal isochoric batch reactor with Gluconobacter oxydans immobilized in poly(vinyl alcohol) gel capsules. The reaction course was described with a three-step kinetic model. Two reaction schemes were proposed and compared with 8 kinetic experiments at 25 °C. The experimental dependences of glycerol and dihydroxyacetone concentrations on reaction time were simulated very well by the autocatalytic model. The effects of reaction temperature and initial concentrations of yeast extract and glycerol were studied. Temperature 25-30 °C, initial yeast extract concentration 2-4 g l-1 and initial glycerol concentration 20-50 g l-1 were found as optimal. The determined rate constants can be used to advantage for industrial production of dihydroxyacetone from glycerol.

Kinetics of lysozyme refolding: structural characterization of a non-specifically collapsed state using time-resolved X-ray scattering

1998 ◽  
Vol 276 (1) ◽  
pp. 225-237 ◽  
Author(s):  
Lingling Chen ◽  
Gudrun Wildegger ◽  
Thomas Kiefhaber ◽  
Keith O Hodgson ◽  
Sebastian Doniach
Keyword(s):  
Structural Characterization ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Lysozyme Refolding ◽  
Kinetics Of ◽  
Ray Scattering

Application of online infrared spectroscopy to study the kinetics of precipitation polymerization of acrylic acid in supercritical carbon dioxide

2016 ◽  
Vol 1 (4) ◽  
pp. 372-378 ◽  
Author(s):  
Jean-Noël Ollagnier ◽  
Thierry Tassaing ◽  
Simon Harrisson ◽  
Mathias Destarac
Keyword(s):  
Carbon Dioxide ◽  
Infrared Spectroscopy ◽  
Supercritical Carbon Dioxide ◽  
Acrylic Acid ◽  
Ftir Spectroscopy ◽  
Precipitation Polymerization ◽  
Kinetics Of Precipitation ◽  
Kinetics Of ◽  
Supercritical Carbon

The kinetics of precipitation polymerization of acrylic acid in supercritical CO2 is monitored by in situ FTIR spectroscopy.

The Influence of the NiO Content on the Microstructure and Property of IT-SOFC Anodes

2011 ◽  
Vol 347-353 ◽  
pp. 3330-3333
Author(s):  
Dan Luo ◽  
Guan Qing Wang ◽  
Xue Feng Huang ◽  
Jiang Rong Xu
Keyword(s):  
Structural Property ◽  
Sintering Temperature ◽  
Intermediate Temperature ◽  
Sintering Kinetics ◽  
Catalytic Activation ◽  
Original Powder ◽  
Sofc Anode ◽  
Kinetics Of

Intermediate temperature SOFC anode/electrolyte plates are made by pechini methods. The structural property of GDC anodes in IT-SOFC was studied. The effect of the synthesizing technology, of the original powder used and that of the sintering temperature, as well as other factors, on crystallization and catalytic activation of anodes have been studied. Results indicate that shrinkage of sintered anode supports with 35％NiO contents lower than that of 50％NiO contents. The effect of porosity of sintered anodes with different NiO contents as a function of sintering temperature was investigated as well. The good sintering kinetics of the GDC anode ceramics were obtained based on the NiO contents control.

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