Measurements of Intermediate Species in Fuel-Rich Oxidation of Ethylene, Toluene, and n-Decane

2021 ◽  
Vol 35 (18) ◽  
pp. 14924-14940
Author(s):  
Shunsuke Suzuki ◽  
Akira Obuchi ◽  
Goutham Kukkadapu ◽  
Koichi Kinoshita ◽  
Yoshinaka Takeda ◽  
...  
Keyword(s):  
Intermediate Species

Lateral Adsorbate Interactions Inhibit HCOO- While Promoting CO Selectivity for CO2 Electrocatalysis on Ag

2018 ◽  
Author(s):  
Divya Bohra ◽  
Isis Ledezma-Yanez ◽  
Guanna Li ◽  
Wiebren De Jong ◽  
Evgeny A. Pidko ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Experimental Approach ◽  
Decisive Role ◽  
Experimental Methods ◽  
Reaction Intermediates ◽  
Intermediate Species ◽  
Experimental Knowledge ◽  
Complex Interactions ◽  
Ag Catalysts

<p>The analysis presented in this manuscript helps bridge an important fundamental discrepancy between the existing theoretical and experimental knowledge regarding the performance of Ag catalysts for CO<sub>2</sub> electrochemical reduction (CO<sub>2</sub>ER). The results demonstrate how the intermediate species *OCHO is formed readily en-route the HCOO<sup>– </sup>pathway and plays a decisive role in determining selectivity of a predominantly CO producing catalyst such as Ag. Our theoretical and experimental approach develops a better understanding of the nature of competition as well as the complex interactions between the reaction intermediates leading to CO, HCOO<sup>–</sup> and H<sub>2</sub> during CO<sub>2</sub>ER.</p><p><br></p><p>Details of computational and experimental methods are present in the Supporting Information provided. </p><p><br></p><p><br></p>

Intermediate species detection in a morpholine flame: contributions to fuel-bound nitrogen conversion from a model biofuel

2010 ◽  
Vol 49 (4) ◽  
pp. 761-773 ◽  
Author(s):  
Patrick Nau ◽  
Angela Seipel ◽  
Arnas Lucassen ◽  
Andreas Brockhinke ◽  
Katharina Kohse-Höinghaus
Keyword(s):  
Intermediate Species ◽  
Species Detection ◽  
Nitrogen Conversion

Pump-Probe Laser Photolytic Fragmentation Fluorescence Spectrometry of Isomeric Alkenes

1994 ◽  
Vol 48 (5) ◽  
pp. 616-619 ◽  
Author(s):  
Bobby J. Stanton ◽  
E. T. Monroe ◽  
E. L. Wehry
Keyword(s):  
Fluorescence Intensity ◽  
Laser Fluence ◽  
Laser Wavelength ◽  
Fluorescence Spectrometry ◽  
Probe Laser ◽  
Intermediate Species ◽  
Pump Probe ◽  
Laser Pump ◽  
Photolysis Laser ◽  
Spectral Patterns

The two-laser “pump-probe” photolytic fragmentation fluorescence spectrometry of three octenes and two nonenes is described. Probe-laser-induced C2 fluorescence (Deslandres-d'Azambuja system, C1II g→ A1II u) is detected. The relative C2 fluorescence intensity and spectral patterns exhibited by each alkene are strongly dependent on the probe-laser wavelength. The dependence of the fragment fluorescence intensity on the probe-laser fluence implies that the “probe” laser induces photofragmentation of intermediate species produced by the “photolysis” laser.

scholarly journals Detection of a Tryptophan Radical as an Intermediate Species in the Reaction of Horseradish Peroxidase Mutant (Phe-221 → Trp) and Hydrogen Peroxide

1998 ◽  
Vol 273 (24) ◽  
pp. 14753-14760 ◽  
Author(s):  
Atsushi Morimoto ◽  
Motomasa Tanaka ◽  
Satoshi Takahashi ◽  
Koichiro Ishimori ◽  
Hiroshi Hori ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Horseradish Peroxidase ◽  
Intermediate Species

The reaction of active nitrogen with fluoroethylenes

1982 ◽  
Vol 60 (20) ◽  
pp. 2629-2633 ◽  
Author(s):  
William E. Jones ◽  
Mahmooda G. Ahmed
Keyword(s):  
Mass Spectrometer ◽  
Reaction Mechanisms ◽  
Flow System ◽  
Intermediate Species ◽  
Active Nitrogen ◽  
Reacting Mixtures

The reactions of active nitrogen with the fluoroethylenes C2H3F, 1,1-C2H2F2, C2HF3, and C2F4 have been investigated in a conventional flow system using a mass spectrometer to detect products and intermediate species. Addition of various gases (H, H2, NH3, CH4, N2O, [Formula: see text], and F) to the reacting mixtures provides evidence that both Hand F atoms play significant roles in the reaction mechanisms, while [Formula: see text] does not. A brief discussion of possible mechanisms is presented.

Prediction of soot formation rates: a new approach

1974 ◽  
Vol 338 (1614) ◽  
pp. 375-396 ◽  
Keyword(s):  
Soot Formation ◽  
Rocket Engine ◽  
Experimental Results ◽  
Intermediate Species ◽  
New Approach ◽  
Fundamental Model ◽  
Gas Reactions ◽  
Gaseous Hydrocarbons ◽  
Controlling Processes ◽  
Exhaust Jet

Five processes controlling the production of soot from gaseous hydrocarbons are distinguished: gas reactions producing radical fragments on which nucleation may begin; nucleation; coagulation; growth; and oxidation. A fundamental model capable of taking into account all these processes is described. The model is applied to the conditions of a practical rocket engine, in which production of soot in the exhaust jet is governed by the rate of pyrolysis of methane in the chamber. Predictions made for these conditions agree with experimental results. The rate controlling processes and key intermediate species are identified.

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