scholarly journals Nonlinear desorption activation energy from TPD curves: Analysis of the influence of initial values for the regression procedure

2020 ◽  
Vol 98 (5) ◽  
pp. 1115-1123 ◽  
Author(s):  
Carlo Pirola ◽  
Alessandro Di Michele
Keyword(s):  
Activation Energy ◽  
Regression Procedure ◽  
Initial Values ◽  
Desorption Activation Energy

Desorption activation energy distribution function of nitric oxide chemisorbed on carbonaceous materials at 373 K

Carbon ◽  
2005 ◽  
Vol 43 (7) ◽  
pp. 1445-1452 ◽  
Author(s):  
Pilar García ◽  
Alejandro Molina ◽  
Fanor Mondragón
Keyword(s):  
Nitric Oxide ◽  
Activation Energy ◽  
Distribution Function ◽  
Energy Distribution ◽  
Energy Distribution Function ◽  
Carbonaceous Materials ◽  
Desorption Activation Energy

In situ FT-IR Investigation of Formic Acid Adsorption on Reduced and Reoxidized Copper Catalysts

1994 ◽  
Vol 48 (7) ◽  
pp. 827-832 ◽  
Author(s):  
Graeme J. Millar ◽  
David Newton ◽  
Graham A. Bowmaker ◽  
Ralph P. Cooney
Keyword(s):  
Activation Energy ◽  
Formic Acid ◽  
Maximum Rate ◽  
Heterogeneous Catalysts ◽  
Copper Catalyst ◽  
Copper Catalysts ◽  
Copper Surface ◽  
Desorption Activation Energy ◽  
Ft Ir

An in situ infrared cell capable of studying reactions over heterogeneous catalysts in the temperature range 77 to 773 K has been designed. In particular, the adsorption of formic acid on a model Cu/SiO2 methanol synthesis catalyst was investigated. Exposure of a reduced copper surface to formic acid at 300 K resulted in the formation of both formic acid molecules, which were ligated to the copper catalyst, and chemisorbed bidentate copper formate species. Under temperature-programming conditions, the bidentate species displayed a maximum rate of desorption at 433 K, which correlates to a desorption activation energy of 120 kJ mol−1. In contrast, on the reoxidized catalyst, unidentate formate species were preferentially formed. These exhibited a maximum rate of desorption at a temperature of 408 K, and a desorption activation energy of 113 kJ mol−1. A mechanism was postulated to explain this behavior, and evidence was presented to show that useful kinetic data can be obtained for desorption from a catalyst in the form of a pressed disk.

Comparison of methods for deriving desorption activation energy

Vacuum ◽  
2015 ◽  
Vol 115 ◽  
pp. 58-60
Author(s):  
R. Knizikevičius
Keyword(s):  
Activation Energy ◽  
Comparison Of Methods ◽  
Desorption Activation Energy

Desorption activation energy of dibenzothiophene on the activated carbons modified by different metal salt solutions

2007 ◽  
Vol 132 (1-3) ◽  
pp. 233-239 ◽  
Author(s):  
Moxin Yu ◽  
Zhong Li ◽  
Qibin Xia ◽  
Hongxia Xi ◽  
Shuwen Wang
Keyword(s):  
Activation Energy ◽  
Activated Carbons ◽  
Metal Salt ◽  
Salt Solutions ◽  
Desorption Activation Energy

The precise deduction of desorption activation energy distributions from thermal evolution spectra

Vacuum ◽  
1984 ◽  
Vol 34 (8-9) ◽  
pp. 797-800 ◽  
Author(s):  
G Carter ◽  
P Bailey ◽  
DG Armour
Keyword(s):  
Activation Energy ◽  
Thermal Evolution ◽  
Energy Distributions ◽  
Desorption Activation Energy

Effects of pore sizes of porous silica gels on desorption activation energy of water vapour

2007 ◽  
Vol 27 (5-6) ◽  
pp. 869-876 ◽  
Author(s):  
Xin Li ◽  
Zhong Li ◽  
Qibin Xia ◽  
Hongxia Xi
Keyword(s):  
Activation Energy ◽  
Water Vapour ◽  
Porous Silica ◽  
Silica Gels ◽  
Pore Sizes ◽  
Desorption Activation Energy

scholarly journals Desorption characteristics and kinetic parameters determination of molecular sieve by thermogravimetric analysis/differential thermogravimetric analysis technique

2018 ◽  
Vol 36 (7-8) ◽  
pp. 1389-1404 ◽  
Author(s):  
Yalou Guo ◽  
Hui Zhang ◽  
Yingshu Liu
Keyword(s):  
Activation Energy ◽  
Thermogravimetric Analysis ◽  
Heating Rates ◽  
Carrier Gas ◽  
Zeolite 13X ◽  
Analysis Technique ◽  
Desorption Activation Energy ◽  
Differential Thermogravimetric Analysis ◽  
Kinetics Of

The kinetics of the thermal desorption of CO2 adsorbed on zeolite 13X were obtained using a differential thermogravimetric analyser under two different carrier gas conditions. The varying heating rates were set as 8, 12, 16, and 20 K min−1, respectively. The desorption activation energy of the physisorption sites for this experiment evaluated by an integral method without prediction of the reaction order ranged from 12.15 to 14.12 kJ mol−1 (CO2 as the carrier gas) and 43.32 to 50.42 kJ mol−1 (Ar as the carrier gas), respectively. The desorption activation energy of the chemisorption sites ranged from 57.95 to 58.53 kJ mol−1 (CO2 as the carrier gas) and 74.02 to 79.92 kJ mol−1 (Ar as the carrier gas), respectively.

Effects of loading different metal ions on an activated carbon on the desorption activation energy of dichloromethane/trichloromethane

2010 ◽  
Vol 179 (1-3) ◽  
pp. 790-794 ◽  
Author(s):  
Qibin Xia ◽  
Zhong Li ◽  
Limin Xiao ◽  
Zhijuan Zhang ◽  
Hongxia Xi
Keyword(s):  
Activation Energy ◽  
Activated Carbon ◽  
Metal Ions ◽  
Desorption Activation Energy

Evaluation of desorption activation energy of SiCl2 molecules

2003 ◽  
Vol 531 (2) ◽  
pp. L347-L350
Author(s):  
R. Knizikevičius
Keyword(s):  
Activation Energy ◽  
Desorption Activation Energy
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