Kinetics of slow thermal chlorination of hydrogen in nickel tubular flow reactors

AIChE Journal ◽  
1972 ◽  
Vol 18 (1) ◽  
pp. 141-145 ◽  
Author(s):  
Leonard S. Bernstein ◽  
Lyle F. Albright
Keyword(s):  
Flow Reactors ◽  
Tubular Flow ◽  
Kinetics Of

scholarly journals Simultaneous Kinetics of Selenite Oxidation and Sorption on δ-MnO2 in Stirred-Flow Reactors

2021 ◽  
Vol 18 (6) ◽  
pp. 2902
Author(s):  
Zheyong Li ◽  
Yajun Yuan ◽  
Lin Ma ◽  
Yihui Zhang ◽  
Hongwei Jiang ◽  
...  
Keyword(s):  
Rate Constant ◽  
Photoelectron Spectroscopy ◽  
Oxide Surfaces ◽  
Kinetic Rate Constant ◽  
Flow Reactors ◽  
Mn Oxide ◽  
Remediation Strategies ◽  
Process Of Se ◽  
Kinetics Of

Selenium (Se) is an essential and crucial micronutrient for humans and animals, but excessive Se brings negativity and toxicity. The adsorption and oxidation of Se(IV) on Mn-oxide surfaces are important processes for understanding the geochemical fate of Se and developing engineered remediation strategies. In this study, the characterization of simultaneous adsorption, oxidation, and desorption of Se(IV) on δ-MnO2 mineral was carried out using stirred-flow reactors. About 9.5% to 25.3% of Se(IV) was oxidized to Se(VI) in the stirred-flow system in a continuous and slow process, with the kinetic rate constant k of 0.032 h−1, which was significantly higher than the apparent rate constant of 0.0014 h−1 obtained by the quasi-level kinetic fit of the batch method. The oxidation reaction was driven by proton concentration, and its rate also depended on the Se(IV) influent concentration, flow rate, and δ-MnO2 dosage. During the reaction of Se(IV) and δ-MnO2, Mn(II) was produced and adsorbed strongly on Mn oxide surfaces, which was evidenced by the total reflectance Fourier transform infrared (ATR-FTIR) results. The X-ray photoelectron spectroscopy (XPS) data indicated that the reaction of Se(VI) on δ-MnO2 produced Mn(III) as the main product. These results contribute to a deeper understanding of the interface chemical process of Se(IV) with δ-MnO2 in the environment.

Use of tubular flow reactors for kinetic studies over extended pressure ranges

1971 ◽  
Vol 75 (10) ◽  
pp. 1593-1601 ◽  
Author(s):  
Robert W. Carr ◽  
Robert V. Poirier
Keyword(s):  
Kinetic Studies ◽  
Flow Reactors ◽  
Tubular Flow

New Insights into the Kinetics of the Gas-Phase Oxidation of Hexafluoropropene

2016 ◽  
Vol 41 (4) ◽  
pp. 418-427 ◽  
Author(s):  
David Lokhat ◽  
Maciej Starzak ◽  
Deresh Ramjugernath
Keyword(s):  
Gas Phase ◽  
Oxidation Process ◽  
Flow Reactor ◽  
Packed Column ◽  
Phase Reaction ◽  
Analytical Technique ◽  
Tubular Flow Reactor ◽  
Gas Phase Oxidation ◽  
Tubular Flow ◽  
Kinetics Of

The gas-phase reaction of hexafluoropropene and molecular oxygen was investigated in a tubular flow reactor at 450 kPa and within a temperature range of 463–493 K using HFP/O2 mixtures containing 20–67% HFP on a molar basis. Capillary and packed column chromatography served as the main analytical technique. The reaction yielded HFPO, COF2, CF3COF, C2F4 and c-C3F6 as gas-phase products. High molecular weight oligomers were also formed. The oligomers were found to have a polyoxadifluoromethylene structure according to elemental and 19F NMR analysis. At 493 K HFP is proposed to undergo oxygen-mediated decomposition to difluorocarbene radicals, yielding greater quantities of difluorocarbene recombination products. Kinetic parameters for a revised model of the oxidation process were identified through least squares analysis of the experimental data.

Chaotic behavior in tubular flow reactors withA→B→C reactions

1989 ◽  
Vol 6 (4) ◽  
pp. 277-281 ◽  
Author(s):  
Sang Hwan Kim ◽  
Ji-Won Yang ◽  
Hyun-soo Yang
Keyword(s):  
Chaotic Behavior ◽  
Flow Reactors ◽  
Tubular Flow

Meerwein–Ponndorf–Verley Reduction of Crotonaldehyde over Supported Zirconium Oxide Catalysts Using Batch and Tubular Flow Reactors

2017 ◽  
Vol 57 (1) ◽  
pp. 70-78 ◽  
Author(s):  
Atsushi Segawa ◽  
Keita Taniya ◽  
Yuichi Ichihashi ◽  
Satoru Nishiyama ◽  
Naohiro Yoshida ◽  
...  
Keyword(s):  
Zirconium Oxide ◽  
Oxide Catalysts ◽  
Flow Reactors ◽  
Tubular Flow

Design of tubular flow reactors for monodisperse aerosol production

AIChE Journal ◽  
1988 ◽  
Vol 34 (4) ◽  
pp. 551-557 ◽  
Author(s):  
T. T. Kodas ◽  
S. K. Friedlander
Keyword(s):  
Flow Reactors ◽  
Tubular Flow
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