Kinetic Studies of Boron Carbide Formation by Chemical Vapor Deposition

Noyan, Dilek
Hö, Özbelge
Dogu, T
Sezgi, Naime Aslı


Kinetic studies for boron carbide formation in a dual impinging-jet reactor
Noyan-Dilek, S; Ozbelge, HO; Sezgi, Naime Aslı; Dogu, T (2001-02-07)
The chemical vapor deposition (CVD) of boron carbide was investigated on a tungsten substrate from a gas mixture of BCl3, H-2, and CH4 in a dual impinging-jet reactor that was connected to an FT-IR spectrometer for on-line analysis of the reactor effluent stream. During CVD of boron carbide, the formation of BHCl2 was experimentally verified, and beta -rhombohedral B4C was formed. Conversion to boron carbide was found to increase with an increase in the BCl3/CH4 ratio. However, conversion to dichloroborane ...
Kinetic modelling of hydrolyzed lignin pyrolysis using thermal analysis
Musin, Timur; Varfolomeev, Mikhail; Gerasimov, Alexander; Kök, Mustafa Verşan (2017-01-01)
Every day more than 60 tons of hydrolyzed lignin are produced only on one bioethanol manufacturing factory, 25000 tons per year. More than 1 million tons of lignin is produced by wood-recycling factories worldwide, which is being combusted to compensate energy costs or just stored as a waste. We suppose that there is a more sufficient way of its recycling and provide another way of lignin use, assuming the pyrolysis process as one of the pretreatment methods of its reproduction into more favorable derivativ...
Kinetic Analysis of Methane Hydrate Formation with Butterfly Turbine Impellers
Longinos, Sotirios Nik.; Longinou, Dionisia Dimitra; Myrzakhmetova, Nurbala; Akimbayeva, Nazgul; Zhursumbaeva, Mariamkul; Abdiyev, Kaldibek; Toktarbay, Zhexenbek; Parlaktuna, Mahmut (2022-07-01)
Heat generation during gas hydrate formation is an important problem because it reduces the amount of water and gas that become gas hydrates. In this research work, we present a new design of an impeller to be used for hydrate formation and to overcome this concern by following the hydrodynamic literature. CH4 hydrate formation experiments were performed in a 5.7 L continuously stirred tank reactor using a butterfly turbine (BT) impeller with no baffle (NB), full baffle (FB), half baffle (HB), and surface b...
Kinetic analysis of dual impellers on methane hydrate formation
Longinos, Sotirios Nik; Parlaktuna, Mahmut (2021-02-01)
This study investigates the effects of types of impellers and baffles onmethane hydrate formation. Induction time, water conversion to hydrates (hydrate yield), hydrate formation rate and hydrate productivity are components that were estimated. The initial hydrate formation rate is generally higher with the use of Ruston turbine (RT) with higher values 28.93x10(-8)mol/s inRT/RT with full baffle (FB) experiment, but the decline rate of hydrate formation was also high compared to up-pumping pitched blade turb...
Kinetic analysis of in situ combustion processes with thermogravimetric and differential thermogravimetric analysis and reaction tube experiments
Kök, Mustafa Verşan (1995-01-01)
This research comprises the determination of kinetic parameters of in situ combustion processes by reaction tube and thermal (thermogravimetric analysis (TGA)/differential thermogravimetric analysis (DTGA)) experiments. A previously developed laboratory model and a Du Pont 9900 thermalanalyzer unit were used to run the experiments. Three reaction regions for combustion of crude oil in porous media were observed in the reaction tube and TGA/DTGA experiments and are defined as low temperature oxidation, fuel ...
Citation Formats
D. Noyan, Ö. Hö, T. Dogu, and N. A. Sezgi, “Kinetic Studies of Boron Carbide Formation by Chemical Vapor Deposition,” 1999, Accessed: 00, 2021. [Online]. Available: