Heterogeneous reaction of nitric acid with methyl sulfide

1985 ◽  
Vol 63 (10) ◽  
pp. 2805-2807
Author(s):  
Donald L. Singleton ◽  
Robert S. Irwin ◽  
Donald J. McKenney ◽  
George Paraskevopoulos
Keyword(s):  
Gas Chromatography ◽  
Infrared Spectroscopy ◽  
Nitric Acid ◽  
Initial Rate ◽  
Heterogeneous Reaction ◽  
Zero Order ◽  
Homogeneous Reaction ◽  
Gaseous Mixtures ◽  
First Order ◽  
Upper Limit

The reaction of gaseous mixtures of CH3SCH3 and HNO3, studied by infrared spectroscopy and gas chromatography, was found to occur heterogeneously. The products detected were NO2 and CH3S(O)CH3, and approximately one NO2 was formed for each CH3SCH3 consumed. The initial rate of formation of NO2 was first order in CH3SCH3 and zero order in HNO3. The mechanism is discussed, and an upper limit is determined for the rate constant of the homogeneous reaction.

THE KINETICS OF THE THERMAL DECOMPOSITION OF DISULPHUR DECAFLUORIDE

1951 ◽  
Vol 29 (6) ◽  
pp. 508-525 ◽  
Author(s):  
W. R. Trost ◽  
R. L. McIntosh
Keyword(s):  
Nitric Oxide ◽  
Thermal Decomposition ◽  
Heterogeneous Reaction ◽  
Homogeneous Reaction ◽  
Chain Reaction ◽  
First Order ◽  
Reaction Proceeds ◽  
Total Process ◽  
A Chain ◽  
Kinetics Of

The thermal decomposition of the gas disulphur decafluoride has been studied in a metal reactor. Analytical evidence showed that the reaction proceeds according to the equation S2F10 = SF6 + SF4.The reaction was found to be largely homogeneous, as the heterogeneous reaction accounted for less than 5% of the total process. The homogeneous reaction was shown to be first order, and in the temperature range investigated the rate is given by ln k = 47.09 − 49,200/RT. A chain reaction is postulated to explain the observed rate of the reaction. The effect of nitric oxide and acetylene dichloride on the rate and products of the reaction was investigated.

Hydrogenation of Fatty Acid Esters. II. Kinetics of Hydrogenation of Methyl (Z)- and (E)-9-Octadecenoate Catalyzed by a Ziegler Nickel Catalyst

1992 ◽  
Vol 57 (12) ◽  
pp. 2583-2592 ◽  
Author(s):  
Jana Krupičková ◽  
Jaroslav Včelák ◽  
Jiří Hetflejš
Keyword(s):  
Fatty Acid ◽  
Nickel Catalyst ◽  
Fractional Order ◽  
Initial Rate ◽  
Zero Order ◽  
Model Catalyst ◽  
Fatty Acid Esters ◽  
First Order ◽  
Kinetics Of ◽  
Acid Esters

Kinetics of the title reactions has been studied, using nickel(II) 2,4-pentanedionate/triethylaluminium system as a model catalyst. Initial rate measurements showed that in both cases the hydrogenation is first order in hydrogen, zero order in the octadecanoate and a fractional order (close to one) in the catalyst. Both hydrogenations have similar activation energies (30.2 ± 2.3 kJ mol-1 and 28.9 ± 2.6 kJ mol-1 for the (Z)- and (E)-9-octadecenoate, respectively). Based on these data and the results of competition experiments, two models have been proposed to describe isomerization of the octadecenoates (either direct or via an intermediate).

Kinetic Study on Photocatalytic Decolorization of Methyl Orange Aqueous Solution with KIO4 under UV Irradiation

2013 ◽  
Vol 838-841 ◽  
pp. 2413-2416
Author(s):  
Hua Fang ◽  
Wu Wei ◽  
Huang Zhun
Keyword(s):  
Methyl Orange ◽  
Uv Irradiation ◽  
Reaction System ◽  
Zero Order ◽  
Homogeneous Reaction ◽  
Optimal Amount ◽  
First Order ◽  
Photocatalytic Decolorization ◽  
Decolorization Efficiency ◽  
Kinetics Of

It has been generally agreed that methyl orange (MO) can be effectively decolorized in KIO4 homogeneous reaction system under UV irradiation. The knowledge on the kinetics of the system possesses both practical and theoretical values. Decolorization efficiency of MO increases as the loading of KIO4 increases and has no an optimal amount of KIO4 in this case. The decolorization reaction manifests the first order with lower concentration and the zero order with higher concentration. As the initial concentration goes up, the order of the reaction is reduced from 1 to 0.

Rate of reaction of dithionite ion with oxygen in aqueous solution

1964 ◽  
Vol 19 (3) ◽  
pp. 522-525 ◽  
Author(s):  
J. A. Morello ◽  
Margot R. Craw ◽  
H. P. Constantine ◽  
R. E. Forster
Keyword(s):  
Aqueous Solution ◽  
Reaction Rate ◽  
Initial Rate ◽  
Sodium Dithionite ◽  
Zero Order ◽  
Flowing Liquid ◽  
First Order ◽  
Rate Of Reaction ◽  
Dithionite Ion ◽  
Kinetics Of

The rate of removal of oxygen from aqueous solution by sodium dithionite in 0.1 m sodium hydroxide was studied in a rapid-reaction apparatus using a membrane-covered polarographic cell to determine Po2 in the flowing liquid. The measurements were made at 37 C, so that the data would be applicable in studies of the kinetics of oxyhemoglobin in blood. The initial concentrations in the mixed reacting solution were between 8 x 10-5 m and 47.5 x 10-5 m for dithionite, and either 10 x 10-5 m or 47.8 x 10-5 m for O2. The reaction over the first 40 msec was found to be first order with respect to dithionite and zero order with respect to molecular oxygen. The initial rate constant was 42.5 ± sd 3.6 sec-1. oxygen reduction by dithionite; hemoglobin; deoxygenation rate; dithionite-oxygen reaction rate Submitted on June 17, 1963

scholarly journals Homogeneous–Heterogeneous Reactions in Boundary-Layer Flow of a Nanofluid Near the Forward Stagnation Point of a Cylinder

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Qingkai Zhao ◽  
Hang Xu ◽  
Longbin Tao
Keyword(s):  
Stagnation Point ◽  
Diffusion Coefficients ◽  
Multiple Solutions ◽  
Heterogeneous Reaction ◽  
Heterogeneous Reactions ◽  
Homogeneous Reaction ◽  
First Order ◽  
First Order Kinetics ◽  
Layer Flow ◽  
Cubic Autocatalator

A mathematical model describing the homogeneous–heterogeneous reactions in the vicinity of the forward stagnation point of a cylinder immerged in a nanofluid is established. We assume that the homogeneous reaction is given by isothermal cubic autocatalator kinetics, while the heterogeneous reaction is chosen as first-order kinetics. The existence of multiple solutions through hysteresis bifurcations is discussed in detail for the various diffusion coefficients of reactant and autocatalyst.

Kinetics of catalytic reduction of nitrogen oxide by carbon monoxide on CuO/Al2O3 catalyst

1983 ◽  
Vol 48 (11) ◽  
pp. 3202-3208 ◽  
Author(s):  
Zdeněk Musil ◽  
Vladimír Pour
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxide ◽  
Rate Equation ◽  
Catalytic Reduction ◽  
Zero Order ◽  
Spectroscopic Measurements ◽  
First Order ◽  
Ir Spectroscopic ◽  
Kinetics Of ◽  
Al2o3 Catalyst

The kinetics of the reduction of nitrogen oxide by carbon monoxide on CuO/Al2O3 catalyst (8.36 mass % CuO) were determined at temperatures between 413 and 473 K. The reaction was found to be first order in NO and zero order in CO. The observed kinetics are consistent with a rate equation derived from a mechanism proposed on the basis of IR spectroscopic measurements.

Area-based speciation kinetic analysis of the multipollutant removal in Constructed Wetlands to enhance its treatment efficiency

2021 ◽  
Author(s):  
Manoj Kumar ◽  
Rajesh Singh
Keyword(s):  
Wastewater Treatment ◽  
Kinetic Analysis ◽  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Zero Order ◽  
Pollutant Removal ◽  
Municipal Wastewater Treatment ◽  
Treatment Efficiency ◽  
First Order ◽  
Present Study Area

In the present study area-based, pollutant removal kinetic analysis was considered using the Zero-order, first-order decay and efficiency loss (EL) models in the constructed wetlands (CWs) for municipal wastewater treatment....

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