Desorption Kinetics and Activation Energy for Cobalt Octaethylporphyrin from Graphite at the Phenyloctane Solution–Graphite Interface: An STM Study

2015 ◽  
Vol 119 (17) ◽  
pp. 9386-9394 ◽  
Author(s):  
Ashish Bhattarai ◽  
Ursula Mazur ◽  
K. W. Hipps
Keyword(s):  
Activation Energy ◽  
Desorption Kinetics ◽  
Kinetics And Activation Energy

Radical-type addition of benzyl bromide to vinyl chloride: the kinetics and activation energy of the process

1993 ◽  
Vol 42 (5) ◽  
pp. 840-842 ◽  
Author(s):  
T. T. Vasil'eva ◽  
S. I. Gapusenko ◽  
A. B. Terent'ev ◽  
V. V. Pinyaskin ◽  
I. V. Stankevich ◽  
...  
Keyword(s):  
Activation Energy ◽  
Vinyl Chloride ◽  
Benzyl Bromide ◽  
Radical Type ◽  
Kinetics And Activation Energy

The Kinetics and Activation Energy of Photocatalytic Degradation of Phenol by TiO2 and TiO2/ PANI Photocatalyst under UV Irradiation

2012 ◽  
Vol 430-432 ◽  
pp. 57-60
Author(s):  
Xue Yan Li ◽  
Qing Zhi Luo ◽  
Jing An ◽  
De Song Wang
Keyword(s):  
Activation Energy ◽  
Photocatalytic Degradation ◽  
Apparent Activation Energy ◽  
Tio2 Nanoparticles ◽  
Uv Irradiation ◽  
Zero Order ◽  
Zero Order Kinetics ◽  
Catalytically Active ◽  
Kinetics And Activation Energy

The kinetics and activation energy of photocatalytic degradation of phenol has been studied using the catalytically active TiO2 and PANI modified TiO2 nanoparticles. The reaction follows a pseudo-zero-order kinetics. Apparent activation energy of phenol photocatalytic degradation in water was 13.76kJ/mol by TiO2 and was 12.31kJ/mol by TiO2/PANI.

scholarly journals DESORPSI β-KAROTEN MINYAK KELAPA SAWIT (CRUDE PALM OIL) DARI KARBON AKTIF MENGGUNAKAN ISOPROPANOL

2017 ◽  
Vol 5 (4) ◽  
pp. 1-7
Author(s):  
Nurul Aini ◽  
Olyvia Putri Wardhani ◽  
Iriany
Keyword(s):  
Activation Energy ◽  
Activated Carbon ◽  
Isopropyl Alcohol ◽  
Desorption Kinetics ◽  
Crude Palm Oil ◽  
Desorption Process ◽  
First Order ◽  
Constant Rate ◽  
Β Carotene ◽  
Main Material

The aim of the research is to study the ability of isopropyl alcohol in the desorption of β-carotene and to obtain kinetic model and desorption isoterm which is suitable in β-carotene desorption. The main material used were isopropyl alcohol and activated carbon containing β-carotene. The variabels used in this research are desorption temperature,  activated carbon concentration  and parameter observed is concentration of β-carotene in isopropyl alcohol. In the desorption process, activated carbon which adsorp β-carotene was soaked in isopropyl alcohol. To review the desorption kinetics, this research was carried out in various temperature such as 40 oC, 50 oC, and 60 oC. In desorption isoterm process is, various mass of activated carbon was used. Desorption process will be analyzed at spesified time. This research used the first order of desorption kinetics model. The desorption constant rate obtained for 40 oC, 50 oC, and 60 oC are 0,013, 0,014, and 0,036 minute-1 with activation energy is 0,226 kkal/mol. The maximum desorption percentage obtain is 41,94 %. The desorption isoterm model which fit with the β-carotene desorption was Langmuir isoterm model with constanta value 1,2077 L/mg and -0,2218.

Adsorption and Desorption Kinetics for Chlorosilanes on Si(111) 7×7

1990 ◽  
Vol 204 ◽  
Author(s):  
P. Gupta ◽  
P.A. Coon ◽  
B.G. Koehler ◽  
M.L. Wise ◽  
S.M. George
Keyword(s):  
Activation Energy ◽  
Surface Coverage ◽  
Temperature Programmed Desorption ◽  
Desorption Kinetics ◽  
Sticking Coefficient ◽  
Temperature Dependent ◽  
Adsorption And Desorption ◽  
Desorption Activation Energy ◽  
Temperature Programmed ◽  
Sticking Coefficients

ABSTRACTThe adsorption and desorption kinetics for SiCl4 and SiCl2H2 on Si(111) 7×7 were studied using laser-induced thermal desorption (LITD) and temperature programmed desorption (TPD) techniques. Both LITD and TPD experiments monitored SiCl2 as the main desorption product at 950 K at all coverages of SiCl4 and SiCl2H2 on Si(111) 7×7.HC1 desorption at 850 K and H2 desorption at 810 K were also observed following SiCl2H2 adsorption. Isothermal LITD measurements of SiCl4 and SiCl2H2) adsorption on Si(111) 7×7 revealed that the initial reactive sticking coefficient decreased with increasing surface temperature for both molecules. The temperature-dependent sticking coefficients were consistent with precursor-mediated adsorption kinetics. Isothermal LITD studies of SiC12 desorption revealed second-order SiCl2 desorption kinetics. The desorption kinetics were characterizedby a desorption activation energy of Ed = 67 kcal/mol and a preexponential of vd = 3.2 cm2/s. TPD studies observed that the HCI desorption yield decreased relative to H2 and SiCl2 desorption as a function of surface coverage following SiCl2H2 exposure. These results indicate that when more hydrogen desorbs as H2 at higher coverages, The remaining chlorine is forced to desorb as SiCl 2.

A mononuclear iron(ii) complex: cooperativity, kinetics and activation energy of the solvent-dependent spin transition

2016 ◽  
Vol 45 (1) ◽  
pp. 107-120 ◽  
Author(s):  
Mark B. Bushuev ◽  
Denis P. Pishchur ◽  
Vladimir A. Logvinenko ◽  
Yuri V. Gatilov ◽  
Ilya V. Korolkov ◽  
...  
Keyword(s):  
Activation Energy ◽  
Spin Crossover ◽  
Spin Transition ◽  
Mononuclear Iron ◽  
Kinetics And Activation Energy

A mononuclear iron(ii) pyrimidine-based complex shows remarkable spin crossover properties and unprecedented thermal robustness.

scholarly journals Thermodynamics, kinetics, and activation energy studies of the sorption of chromium(III) and chromium(VI) to a Mn3O4 nanomaterial

2014 ◽  
Vol 254 ◽  
pp. 374-383 ◽  
Author(s):  
Yvette Cantu ◽  
Abril Remes ◽  
Alejandra Reyna ◽  
Denise Martinez ◽  
Jahaziel Villarreal ◽  
...  
Keyword(s):  
Activation Energy ◽  
Chromium Vi ◽  
Kinetics And Activation Energy
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