Kinetics of CaCO3 Scale Formation. The Influence of Temperature, Supersaturation and Ionic Composition

2001 ◽  
Author(s):  
Terje Østvold ◽  
Preben Randhol
Keyword(s):  
Ionic Composition ◽  
Scale Formation ◽  
Influence Of Temperature ◽  
Kinetics Of

Kinetic Study of the Diels-Alder Reaction of Cyclopentadiene with Bis(2-Ethylhexyl) Maleate

2013 ◽  
Vol 634-638 ◽  
pp. 541-545 ◽  
Author(s):  
Jun Seong Park ◽  
Dae Hee Yun ◽  
Tae Won Ko ◽  
Yong Sung Park ◽  
Je Wan Woo
Keyword(s):  
Kinetic Study ◽  
Reaction Temperature ◽  
Atmospheric Pressure ◽  
Arrhenius Equation ◽  
Alder Reaction ◽  
Diels Alder ◽  
Influence Of Temperature ◽  
Diels Alder Reaction ◽  
Influence Of Temperature On ◽  
Kinetics Of

The kinetics of the Diels-Alder reaction of cyclopentadiene with bis(2-ethylhexyl) maleate has been studied at temperatures between 25 and 100 °C and at atmospheric pressure. The influence of temperature on the kinetic constants was determined by fitting the results to the Arrhenius equation. As a result, fitting line similar with the linear curve of the Arrhenius equation at 25, 30 and 40 °C. However, the fitting curve, at 60, 80 and 100 °C, tended towards the outside of the curve in the form of Arrhenius equation. The ratio of endo/exo was a slight change from increase of the reaction temperature.

Experiments on the Kinetics of CO2 Loaded MDEA-DEA Aqueous Solution

2014 ◽  
Vol 955-959 ◽  
pp. 2306-2309
Author(s):  
Shu Bin Zhao ◽  
Pan Zhang ◽  
Xiao Tong Cai ◽  
Dong Fu
Keyword(s):  
Aqueous Solution ◽  
Mass Fraction ◽  
Absorption Rate ◽  
Normal Pressure ◽  
Influence Of Temperature ◽  
Kinetics Of

The absorption rates of CO2 in diethanolamine (DEA) promoted N-methyldiethanolamine (MDEA) aqueous solution were measured at normal pressure with temperatures ranging from 303.15-323.15K. The influence of temperature and the mass fraction of DEA on the absorption rate of CO2 was illustrated.

The influence of temperature on the kinetics of apatite flotation from magnetite fines

1998 ◽  
Vol 54 (3-4) ◽  
pp. 131-145 ◽  
Author(s):  
Fenwei Su ◽  
K Hanumantha Rao ◽  
K.S.E Forssberg ◽  
P.O Samskog
Keyword(s):  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Kinetics Of

The Influence of Temperature of Electrodeposition on the Electrochemical Properties of Ni+MoS2 Composite Coatings

2015 ◽  
Vol 228 ◽  
pp. 237-241
Author(s):  
Magdalena Popczyk ◽  
B. Łosiewicz
Keyword(s):  
Steady State ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Porous Electrodes ◽  
Plating Bath ◽  
Influence Of Temperature ◽  
Surface Development ◽  
Kinetics Of ◽  
Crystalline Component ◽  
Galvanostatic Conditions

The Ni+MoS2composite coatings were prepared by electrodeposition under galvanostatic conditions from the Ni-plating bath containing suspended MoS2powder (100 mesh). Investigations of hydrogen evolution reaction (HER) were carried out using steady-state polarization measurements and electrochemical impedance spectroscopy (EIS) in 5 M KOH solution on the coatings obtained at 30, 40, and 50°C. It was found that the kinetics of the HER on the Ni+MoS2coatings decreases with the increase in the electrodeposition temperature of the coatings. This effect is attributed to decreasing content of MoS2(from 26.4 to 18.0 wt.%) embedded into the Ni matrix as composite crystalline component having the electrocatalytic properties towards the HER and/or surface development of the coatings. The higher amount of MoS2was embedded, the more porous electrodes containing pear-shape pores on the surface were produced what was detected by EIS.

scholarly journals Influence of temperature on the dissolution kinetics of synthetic LaPO4-monazite in acidic media between 50 and 130 °C

2018 ◽  
Vol 509 ◽  
pp. 488-495 ◽  
Author(s):  
Yulia Arinicheva ◽  
Clemence Gausse ◽  
Stefan Neumeier ◽  
Felix Brandt ◽  
Konstantin Rozov ◽  
...  
Keyword(s):  
Dissolution Kinetics ◽  
Acidic Media ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Kinetics Of

Contribution to Kinetics of Superplastic Deformation of Dispersion Strengthened Al-Al4C3 System

2012 ◽  
Vol 31 (1) ◽  
Author(s):  
Michal Besterci ◽  
Marián Varchola ◽  
Ladislav Kováč ◽  
Oksana Velgosová
Keyword(s):  
Strain Rate ◽  
Superplastic Deformation ◽  
Constant Strain Rate ◽  
Superplastic Behavior ◽  
Influence Of Temperature ◽  
Kinetics Of

AbstractThe influence of temperature at constant strain rate has been evaluated with respect to superplastic behavior of dispersion strengthened Al-Al

Kinetics of CaCO3 Scale Formation During Core Flooding

2008 ◽  
Author(s):  
Tore Larsen ◽  
Maria Lioliou ◽  
Terje Ostvold ◽  
Leif Olav Josang ◽  
Preben Randhol
Keyword(s):  
Scale Formation ◽  
Core Flooding ◽  
Kinetics Of

scholarly journals K-Na EXCHANGE ACCOMPANYING THE PROLYTIC LOSS OF K FROM HUMAN RED CELLS

1947 ◽  
Vol 30 (5) ◽  
pp. 379-387 ◽  
Author(s):  
Eric Ponder
Keyword(s):  
Steady State ◽  
Cell Metabolism ◽  
Ionic Composition ◽  
Surface Membrane ◽  
Sodium Taurocholate ◽  
Red Cells ◽  
Red Cell ◽  
Membrane Changes ◽  
Kinetics Of ◽  
Human Red Cells

In systems containing human red cells and sodium taurocholate as a lysin, or distearyl lecithin as a sphering agent, the prolytic loss of K at 25°C. is accompanied by a gain of Na by the cell, the gain being somewhat greater than the K loss. A small volume increase accompanies the exchange. The kinetics of the K loss and the Na gain are similar to those already described; i.e., the changes are rapid at first, and slow down so that after 12 to 20 hours it appears that a new steady state is being approached. Similar, but smaller, losses of K and gains of Na occur when the cells stand in isotonic NaCl at 25°C. without the addition of a lysin or sphering agent. On these and other experimental grounds, it is impossible to retain the idea that the mammalian red cell in general is impermeable to cations. The cells nevertheless seem to be in a steady state with respect to their environment, their ionic composition changing as the composition of the environment is changed. The possible processes by means of which one steady state can be exchanged for another—changes in the permeability of a surface membrane, changes in the velocity of an active ion transfer process dependent on red cell metabolism, and changes in the activity of the ions in the red cell interior as a result of changes in an orderly internal structure—are discussed.

Sign in / Sign up

Export Citation Format

Share Document