Temperature-programmed decomposition of [Mo(CO)6]: indication of surface reactions and cluster formation

1997 ◽  
pp. 1243-1250 ◽  
Author(s):  
How-Ghee Ang ◽  
Gaik-Khuan Chuah ◽  
Stephan Jaenicke ◽  
Wai-Leng Loh
Keyword(s):  
Surface Reactions ◽  
Cluster Formation ◽  
Temperature Programmed ◽  
Temperature Programmed Decomposition

scholarly journals THERMAL DECOMPOSITION OF BARZAS COALS

2021 ◽  
Vol 64 (3) ◽  
pp. 92-99
Author(s):  
Ivan Ya. Petrov ◽  
Boris G. Tryasunov ◽  
Alexander R. Bogomolov ◽  
Konstantin Yu. Ushakov ◽  
Alexander S. Zyabrev
Keyword(s):  
Thermal Decomposition ◽  
Temperature Region ◽  
Adsorbed Water ◽  
Volatile Components ◽  
Coal Pyrolysis ◽  
Helium Atmosphere ◽  
Mineral Components ◽  
Temperature Programmed ◽  
Temperature Programmed Decomposition ◽  
Coal Organic Matter

Thermal decomposition processes of two types of Barzas sapromixites - a tile-like modification (“tile”) and a product of its weathering (“exfoliated tile”) - have been investigated in various media (air and helium). It has been shown that in the course of temperature-programmed decomposition (10 °C/min) of these forms of tile-like Barzas sapromixite, in both oxidizing (air) and inert (helium) atmospheres, four main temperature ranges can be distinguished: 1) < 150 °C - removal of adsorbed water (this temperature region is more pronounced for the weathered form of tile-like Barzas sapromixite); 2) 150-350 °C - removal of low molecular weight volatile components of coal in helium environment (with their simultaneous ignition in case of the decomposition in air); 3) 350-550 °C - the temperature region of primary or fast coal pyrolysis in an inert medium; in an oxidative medium, this stage of pyrolysis is accompanied by the burning of released tarry substances; 4) > 550 °C - the temperature region of secondary or high-temperature coal pyrolysis to form semi-coke in helium atmosphere, or the region of burning this semi-coke in air medium. Thermal breakdown processes of “exfoliated tiles” in the temperature range of the most intensive decomposition (350-550 °C) have been found to require less energy consumptions than the similar processes for tile-like Barzas coals (by 72-73 kJ/mol for both gas media of thermal treatment). It is supposed that the differences observed in thermal behavior of Barzas sapromixite forms under investigation may be related to the different contents of mineral components and their effects on the thermal decomposition of coal organic matter.

Temperature programmed decomposition of cobalt ethylene diamine complexes

1999 ◽  
Vol 334 (1-2) ◽  
pp. 141-148 ◽  
Author(s):  
S Dash ◽  
P.K Ajikumar ◽  
M Kamruddin ◽  
A.K Tyagi
Keyword(s):  
Ethylene Diamine ◽  
Temperature Programmed ◽  
Temperature Programmed Decomposition

A Study on Kinetics Parameters of Titanium Hydride Powder from Its TPD Spectrum for Metal Foam

2007 ◽  
Vol 534-536 ◽  
pp. 937-940 ◽  
Author(s):  
Dong Hui Yang ◽  
Sang Youl Kim ◽  
Bo Young Hur
Keyword(s):  
Titanium Hydride ◽  
Metal Foam ◽  
Al Alloy ◽  
Superposition Method ◽  
Kinetics Parameters ◽  
Foaming Process ◽  
Titanium Hydride Powder ◽  
Temperature Programmed ◽  
Set Up ◽  
Temperature Programmed Decomposition

In this paper, the whole temperature programmed decomposition (TPD) spectrum of titanium hydride was acquired by the special designed set-up. After separating and simulating the TPD spectrum by using Spectrum Superposition Method (SSM), Consulting Table Method (CTM) and differential spectrum technique, the kinetics parameters of titanium hydride and corresponding equations were obtained. Using these kinetics equations, the fabrication parameters of Al alloy foam can be determined and foaming process of Al alloy melt can be predicted.

scholarly journals Speciation of mercury in fly ashes by temperature programmed decomposition

2011 ◽  
Vol 92 (3) ◽  
pp. 707-711 ◽  
Author(s):  
M. Antonia Lopez-Anton ◽  
Ron Perry ◽  
Patricia Abad-Valle ◽  
Mercedes Díaz-Somoano ◽  
M. Rosa Martínez-Tarazona ◽  
...  
Keyword(s):  
Fly Ashes ◽  
Temperature Programmed ◽  
Temperature Programmed Decomposition

Surface Reactions in the Decomposition of Zinc Alkyls on Si(100)-2×1 Surfaces

1990 ◽  
Vol 204 ◽  
Author(s):  
M.A. Rueter ◽  
J.M. Vohs
Keyword(s):  
High Resolution ◽  
Surface Reactions ◽  
Temperature Programmed Desorption ◽  
Silicon Surfaces ◽  
Methyl Groups ◽  
Methyl Radicals ◽  
Resolution Electron ◽  
Temperature Programmed ◽  
Electron Energy Loss ◽  
Insight Into

ABSTRACTThe adsorption and reaction of dimethylzinc and diethylzinc on Si(100)-2×l surfaces was studied using temperature programmed desorption and high resolution electron energy loss spectroscopy. These zinc alkyls were found to dissociate at temperatures less than 300 K to produce adsorbed alkyl species and deposit zinc on the surface. During temperature programmed desorption zinc metal desorbed at 530 K leaving only alkyl species on the surface at higher temperatures. Surface methyl groups were found to decompose to carbon and hydrogen or desorb as methyl radicals, while surface ethyl groups underwent a series of surface reactions which resulted in three separate ethylene desorption peaks. The results of this study provide new insight into the reactions of group II metal alkyls on silicon surfaces.

scholarly journals Speciation of Hg retained in gasification biomass chars by temperature-programmed decomposition

2014 ◽  
Vol 126 ◽  
pp. 1-4 ◽  
Author(s):  
Manuela Rallo ◽  
Aida Fuente-Cuesta ◽  
M. Antonia Lopez-Anton ◽  
Mercedes Díaz-Somoano ◽  
M. Rosa Martínez-Tarazona ◽  
...  
Keyword(s):  
Temperature Programmed ◽  
Temperature Programmed Decomposition
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