Studies on the dynamics of adsorption and desorption from combustion particles, by temperature dependent measurement of size, mass and photoelectric yield

1993 ◽  
Vol 68 (1-2) ◽  
pp. 159-176 ◽  
Author(s):  
D. Steiner ◽  
H. Burtscher
Keyword(s):  
Temperature Dependent ◽  
Adsorption And Desorption ◽  
Combustion Particles ◽  
Dependent Measurement

Temperature Dependent Measurement And Simulation Of Fresnel Lenses For Concentrating Photovoltaics

2010 ◽  
Author(s):  
Thorsten Hornung ◽  
Andreas Bachmaier ◽  
Peter Nitz ◽  
Andreas Gombert ◽  
Andreas W. Bett ◽  
...  
Keyword(s):  
Temperature Dependent ◽  
Dependent Measurement ◽  
Fresnel Lenses

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.

Temperature-dependent measurement of Auger recombination in In0.40Ga0.60N/GaN red-emitting (λ = 630 nm) quantum dots

2014 ◽  
Vol 104 (8) ◽  
pp. 081121 ◽  
Author(s):  
Thomas Frost ◽  
Animesh Banerjee ◽  
Shafat Jahangir ◽  
Pallab Bhattacharya
Keyword(s):  
Quantum Dots ◽  
Auger Recombination ◽  
Temperature Dependent ◽  
Dependent Measurement

scholarly journals Temperature-dependent measurement of Auger recombination in self-organized In0.4Ga0.6As/GaAs quantum dots

2001 ◽  
Vol 79 (6) ◽  
pp. 722-724 ◽  
Author(s):  
S. Ghosh ◽  
P. Bhattacharya ◽  
E. Stoner ◽  
J. Singh ◽  
H. Jiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Auger Recombination ◽  
Temperature Dependent ◽  
Self Organized ◽  
Dependent Measurement

Zeolite H-ZSM-5: A Microporous Proton Conductor for the in situ Monitoring of DeNOx-SCR

2011 ◽  
Vol 1330 ◽  
Author(s):  
Thomas Simons ◽  
Ulrich Simon
Keyword(s):  
Gas Phase ◽  
Thermal Activation ◽  
Catalytic Reduction ◽  
Proton Conductor ◽  
In Situ Monitoring ◽  
Temperature Dependent ◽  
Sensor Material ◽  
Dependent Measurement ◽  
Phase Temperature

ABSTRACTImpedance spectroscopy was applied on zeolite H-ZSM 5 as a proton conducting NH3 sensor material and DeNOx-SCR (selective catalytic reduction of NOx with NH3) catalysts at the same time under SCR conditions. We show that in situ monitoring of the NH3 conversion with NOx becomes feasible when the zeolite is loaded with NH3 first and NOx is applied afterwards to the gas phase. Temperature dependent measurements allow discriminating NH3 desorption from catalytic conversion and time dependent measurement give first hints on the thermal activation of the conversion.

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