scholarly journals Possibility of using pressure timing course from outlet nozzle of low-pressure impulse gas-phase injector to evaluate its flow properties

2020 ◽  
Author(s):  
Dariusz Szpica ◽  
Andrzej Borawski ◽  
Grzegorz Mieczkowski ◽  
Mohamed M. Awad ◽  
Ahmed Elgarayhi ◽  
...  
Keyword(s):  
Gas Phase ◽  
Low Pressure ◽  
Flow Properties ◽  
Outlet Nozzle ◽  
Pressure Impulse

scholarly journals NMR imaging of low pressure, gas-phase transport in packed beds using hyperpolarized xenon-129

AIChE Journal ◽  
2015 ◽  
Vol 61 (11) ◽  
pp. 4013-4019 ◽  
Author(s):  
Galina Pavlovskaya ◽  
Joseph Six ◽  
Thomas Meersman ◽  
Navin Gopinathan ◽  
Sean P. Rigby
Keyword(s):  
Gas Phase ◽  
Low Pressure ◽  
Nmr Imaging ◽  
Packed Beds ◽  
Hyperpolarized Xenon ◽  
Gas Phase Transport ◽  
Phase Transport

scholarly journals Composition Determination of Low-Pressure Gas-Phase Mixtures by 1H NMR Spectroscopy

2019 ◽  
Vol 91 (7) ◽  
pp. 4429-4435 ◽  
Author(s):  
Christopher L. Suiter ◽  
Mark O. McLinden ◽  
Thomas J. Bruno ◽  
Jason A. Widegren
Keyword(s):  
Nmr Spectroscopy ◽  
Gas Phase ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Low Pressure ◽  
Composition Determination

Gasphasen-Reaktionen, 58 [1, 2] β-Chlorethylazid: HCl-Eliminierung und Pyrolyse / Gas Phase Reactions, 58 [1, 2] β-Chloroethyl Azide: HCl Elimination and Pyrolysis

1987 ◽  
Vol 42 (3) ◽  
pp. 301-307 ◽  
Author(s):  
Hans Bock ◽  
Ralph Dammel
Keyword(s):  
Real Time ◽  
Gas Phase ◽  
Flow System ◽  
Chemical Activation ◽  
Thermolysis Product ◽  
Low Pressure ◽  
Gas Analysis ◽  
Gas Phase Reactions ◽  
Pressure Flow ◽  
By Products

The HCl elimination from β-chloroethyl azide (1-azido-2-chloroethane) over potassium tert. butanolate at 350 K in a low pressure flow system is optimized using PE spectroscopic real-time gas analysis. The highly explosive vinyl azide formed can be purified by cool-trapping the by-products. Its subsequent and virtually hazard-free pyrolysis yields 2H-azirine, which can be isolated at temperatures below 240 K.In contrast, the direct pyrolysis of β-chloroethyl azide requires temperatures above 710 K and results in a simultaneous split-off of both HCl and N2, yielding acetonitrile as the main thermolysis product. No intermediates such as β-chloroethanimine or ketenimine are observed, a result which is interpreted in terms of chemical activation

Homogeneous Gas Phase Nucleation of Silane in Low Pressure Chemical Vapor Deposition (LPCVD)

1988 ◽  
Vol 135 (9) ◽  
pp. 2378-2379 ◽  
Author(s):  
Z. M. Qian ◽  
H. Michiel ◽  
A. Van Ammel ◽  
J. Nijs ◽  
R. Mertens
Keyword(s):  
Chemical Vapor Deposition ◽  
Gas Phase ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Low Pressure ◽  
Pressure Chemical ◽  
Phase Nucleation

The photolysis of 2,3- and 3,3-dimethyl-1-butene at 147.0 and 184.9 nm

1985 ◽  
Vol 63 (1) ◽  
pp. 62-67 ◽  
Author(s):  
Hélène Deslauriers ◽  
Guy J. Collin
Keyword(s):  
Quantum Yield ◽  
Gas Phase ◽  
Electronic State ◽  
Photon Energy ◽  
Low Pressure ◽  
Decomposition Process ◽  
Primary Decomposition ◽  
Primary Process ◽  
The One

The photofragmentation of 2,3-dimethylbutene and 3,3-dimethylbutene has been studied at 147 and 184.9 nm in the gas phase. The main primary decomposition process at both wavelengths involves the rupture of a β(C—C) bond. The quantum yield for this process is higher than 0.7 at 147 nm and is probably even higher at 184.9 nm. All dimethallyl radicals formed at 147 nm in this process decompose at low pressure, but some of them isomerize from the α,β- to the α,α- structure (and vice versa) — via a 1,4-H transfer — before decomposition. At 184.9 nm, the same primary process is used to get a rough value for the lifetime of the photoexcited molecule, compared with the one made with RRKM calculations by assuming that all the photon energy resides in the vibrational framework of the fundamental electronic state. These lifetimes are about one nanosecond or less.

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