An in situ spatially resolved method to probe gas phase reactions through a fixed bed catalyst

2012 ◽  
Vol 2 (9) ◽  
pp. 1811 ◽  
Author(s):  
Jamal Touitou ◽  
Kevin Morgan ◽  
Robbie Burch ◽  
Christopher Hardacre ◽  
Alexandre Goguet
Keyword(s):  
Gas Phase ◽  
Fixed Bed ◽  
Gas Phase Reactions ◽  
Spatially Resolved

scholarly journals An in situ spatially resolved analytical technique to simultaneously probe gas phase reactions and temperature within the packed bed of a plug flow reactor

The Analyst ◽  
2013 ◽  
Vol 138 (10) ◽  
pp. 2858 ◽  
Author(s):  
Jamal Touitou ◽  
Robbie Burch ◽  
Christopher Hardacre ◽  
Colin McManus ◽  
Kevin Morgan ◽  
...  
Keyword(s):  
Gas Phase ◽  
Flow Reactor ◽  
Plug Flow ◽  
Packed Bed ◽  
Plug Flow Reactor ◽  
Gas Phase Reactions ◽  
Analytical Technique ◽  
Spatially Resolved

Gas Phase and Surface Reactions in Mocvd of GaAs from Triethylgallium, Trimethylgallium, and Organometallic Arsenic Precursors

1988 ◽  
Vol 131 ◽  
Author(s):  
Thomas R. Omstead ◽  
Penny M. Van Sickle ◽  
Klavs F. Jensen
Keyword(s):  
Gas Phase ◽  
Low Temperatures ◽  
Surface Reactions ◽  
Rate Data ◽  
Gas Phase Reactions ◽  
Heated Zone ◽  
Model Predictions ◽  
First Time ◽  
Good Agreement

ABSTRACTThe growth of GaAs from triethylgallium (TEG) and trimethylgallium (TMG) with tertiarybutylarsine (tBAs), triethylarsenic (TEAs), and trimethylarsenic (TMAs), has been investigated by using a reactor equipped with a recording microbalance for in situ rate measurements. Rate data show that the growth with these precursors is dominated by the formation of adduct compounds in the gas lines, by adduct related parasitic gas phase reactions in the heated zone, and by the surface reactions. A model is proposed for the competition between deposition reactions and the parasitic gas phase reactions. Model predictions are in very good agreement with experimental data for all combinations of precursors except for TEG/TMAs where extensive gallium droplet formation is observed at low temperatures. Growth of reasonable quality GaAs with Hall mobilities of 7600 cm2/Vs at 77 K using TEG and tBAs is reported for the first time.

Metallic Fe nanoparticles trapped in self-adapting nanoreactors: a novel high-capacity anode for aqueous Ni–Fe batteries

2017 ◽  
Vol 53 (94) ◽  
pp. 12661-12664 ◽  
Author(s):  
Linpo Li ◽  
Jianhui Zhu ◽  
Yanli Niu ◽  
Zuhong Xiong ◽  
Jian Jiang
Keyword(s):  
Gas Phase ◽  
Single Phase ◽  
High Capacity ◽  
Gas Phase Reactions ◽  
Cyclic Durability ◽  
Fe Nanoparticles

An in situ evolution method via gas-phase reactions is developed to make single-phase Fe nanoparticles confined in thick C nanoreactors for Ni–Fe cells. Such smart hybrids exhibit prominent anodic performance on both stored capacity and cyclic durability.

FTIR In Situ Studies of the Gas Phase Reactions in Chemical Vapor Deposition of SiC

1995 ◽  
Vol 142 (7) ◽  
pp. 2357-2362 ◽  
Author(s):  
S. Jonas ◽  
W. S. Ptak ◽  
W. Sadowski ◽  
E. Walasek ◽  
C. Paluszkiewicz
Keyword(s):  
Chemical Vapor Deposition ◽  
Gas Phase ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Gas Phase Reactions ◽  
In Situ Studies

scholarly journals A quasi in situ TEM grid reactor for decoupling catalytic gas phase reactions and analysis

2018 ◽  
Vol 195 ◽  
pp. 121-128 ◽  
Author(s):  
Liudmyla Masliuk ◽  
Manfred Swoboda ◽  
Gerardo Algara-Siller ◽  
Robert Schlögl ◽  
Thomas Lunkenbein
Keyword(s):  
Gas Phase ◽  
In Situ Tem ◽  
Gas Phase Reactions ◽  
Tem Grid

High Temperature Gas Phases Reactions Of Trimethylgallium with Ammonia and Trimethylamine

1996 ◽  
Vol 423 ◽  
Author(s):  
A. Thon ◽  
S. A. Safvi ◽  
T. F. Kuech
Keyword(s):  
High Temperature ◽  
Gas Phase ◽  
Gas Phase Reactions ◽  
Gas Phases ◽  
Organic Vapor ◽  
Tube Reactor ◽  
Decomposition Processes ◽  
Metal Organic ◽  
Thermal Stability Of

AbstractThe use of trimethylgallium-trimethylamine (TMG:TMN) adduct as alternative cation precursor for MOVPE of GaN was studied by means of in-situ mass spectroscopy in an isothermal flow tube reactor. The temperature, pressure and reaction time were chosen to emulate the gas phase environment typical of the metal-organic vapor phase: epitaxy (MOVPE) of GaN. Dynamic changes in the mass spectra are reported for the gas phase reactions between trimethylgallium (TMG) and TMN in hydrogen (H2/D2) and ammonia (NH3/ND3) ambients. Evidence presented for the high temperature TMG:TMN adduct formation, followed by ethane elimination. The strength of the adduct bonding is comparable to that of TMG:NH3 and thus suppresses TMN displacement by ammonia. The thermal stability of TMG:TMN was found to be higher in ammonia ambient than it is in hydrogen. Kinetic parameters for some of the decomposition processes are given.

Diffusion weighted magnetic resonance imaging for temperature measurements in catalyst supports with an axial gas flow

2019 ◽  
Vol 4 (10) ◽  
pp. 1844-1853
Author(s):  
Mojtaba Mirdrikvand ◽  
Harm Ridder ◽  
Jorg Thöming ◽  
Wolfgang Dreher
Keyword(s):  
Gas Phase ◽  
Gas Flow ◽  
Temperature Measurements ◽  
Catalyst Supports ◽  
Diffusion Weighted Mri ◽  
Resonance Imaging ◽  
Gas Phase Reactions ◽  
Diffusion Weighted ◽  
Weighted Magnetic Resonance Imaging

In situ thermometry of catalytic gas phase reactions allows to determine temperature profiles in catalyst beds. Diffusion weighted MRI is proposed as an alternative method for temperature measurements using capillaries filled with different liquids.

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