Applied kinetics of catalytic cracking in cocurrent-flow reactors

1973 ◽  
Vol 9 (10) ◽  
pp. 751-755
Author(s):  
G. N. Chernakova ◽  
D. I. Orochko ◽  
V. S. Gubanova ◽  
T. Kh. Melik-Akhnazarov ◽  
R. S. Livshits ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Cocurrent Flow ◽  
Flow Reactors ◽  
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.

ChemInform Abstract: Kinetics of the Catalytic Cracking of Paraffins at Very Short Times on Stream

ChemInform ◽  
2010 ◽  
Vol 25 (16) ◽  
pp. no-no
Author(s):  
A. CORMA ◽  
P. J. MIGUEL ◽  
A. V. ORCHILLES
Keyword(s):  
Catalytic Cracking ◽  
Kinetics Of ◽  
Short Times

Modelling the kinetics of fast catalytic cracking reactions

1989 ◽  
Vol 67 (6) ◽  
pp. 955-962 ◽  
Author(s):  
R. Collyer ◽  
M. Larocca ◽  
H. De Lasa
Keyword(s):  
Catalytic Cracking ◽  
Kinetics Of

Kinetics of gas oil catalytic cracking 

2006 ◽  
Vol 88 (1) ◽  
pp. 111-118 ◽  
Author(s):  
Katica Sertić-Bionda ◽  
Zoran Gomzi ◽  
Maja Fabulić-Ruszkowski
Keyword(s):  
Catalytic Cracking ◽  
Gas Oil ◽  
Kinetics Of

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

Feedstock conversion in cocurrent-flow reactors

1982 ◽  
Vol 18 (3) ◽  
pp. 120-123
Author(s):  
R. S. Livshits ◽  
N. M. Marchenko ◽  
O. P. Kornilova
Keyword(s):  
Cocurrent Flow ◽  
Flow Reactors
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