scholarly journals KINETIC INVESTIGATION OF CARBON DIOXIDE, ACETIC ACID, ACRYLIC ACID FORMATION ON DILUTED AND LEACHED MoVTeNb CATALYST

2012 ◽  
Vol 12 (2) ◽  
pp. 131-134 ◽  
Author(s):  
Restu Kartiko Widi
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Acrylic Acid ◽  
Reaction Kinetics ◽  
Partial Order ◽  
Deep Oxidation ◽  
Acid Formation ◽  
Kinetic Investigation ◽  
First Order

Reaction kinetics for the oxidation of propane over diluted-leached MoVTeNb is described. This paper is focused on the study of determination of the orders of carbon dioxide, acetic acid and acrylic acid formation. Deep oxidation of propane to carbon dioxide is first order with respect to hydrocarbon, and partial order (0.31) with respect to oxygen. The selective oxidation of propane to acrylic acid is partial order (0.49) with respect to hydrocarbon and partial order (0.09) with respect to oxygen.

scholarly journals KINETIC INVESTIGATION OF PROPANE DISAPPEARANCE AND PROPENE FORMATION IN PROPANE OXIDATION ON DILUTED AND LEACHED MoVTeNb CATALYST

2010 ◽  
Vol 10 (2) ◽  
pp. 172-176
Author(s):  
Restu Kartiko Widi
Keyword(s):  
Reaction Kinetics ◽  
Partial Order ◽  
Reaction Order ◽  
Propane Oxidation ◽  
Kinetic Investigation ◽  
Formation Kinetic ◽  
Kinetic Reaction ◽  
First Order ◽  
Langmuir Hinshelwood Mechanism

Reaction kinetics for the oxidation of propane over diluted-leached MoVTeNb is described. This paper is focused on the study of products selectivity profile and determination of the orders of propane disappearance and propene formation. The result shows that selective oxidation of propane to propene over this catalyst follows the Langmuir-Hinshelwood mechanism. The disappearance of propane is first order with respect to hydrocarbon and partial order (0.21) with respect to oxygen. The propene formation is first order with respect to hydrocarbon and not depending on oxygen concentration.   Keywords: propane oxidation, propane disappearance, propene formation, kinetic, reaction order

scholarly journals Pyrolysis of phenylmercaptoacetic acid

1968 ◽  
Vol 46 (2) ◽  
pp. 191-197 ◽  
Author(s):  
A. T. C. H. Tan ◽  
A. H. Sehon
Keyword(s):  
Carbon Dioxide ◽  
Activation Energy ◽  
Carbon Monoxide ◽  
Acetic Acid ◽  
Rate Constant ◽  
Order Reaction ◽  
First Order Reaction ◽  
Kcal Mole ◽  
Dissociation Process ◽  
First Order

The pyrolysis of phenylmercaptoacetic acid was investigated by the toluene-carrier technique over the temperature range 760–835 °K. The main products of the decomposition were phenyl mercaptan, carbon dioxide, acetic acid, phenyl methyl sulfide, carbon monoxide, and dibenzyl.The overall decomposition was a first-order reaction with respect to phenylmercaptoacetic acid and could be represented by the two parallel steps:[Formula: see text]Reaction [1] was shown to be a homogeneous first-order dissociation process, and its rate constant was represented by the expression[Formula: see text]The activation energy of this reaction, i.e. 58 kcal/mole, was identified with D(C6H5S—CH2COOH).

scholarly journals Reaction Kinetics of Carbon Dioxide in Aqueous Diethanolamine Solutions Using the Stopped-Flow Technique

2012 ◽  
Vol 19 (1) ◽  
pp. 55-66 ◽  
Author(s):  
Marta Siemieniec ◽  
Hanna Kierzkowska-Pawlak ◽  
Andrzej Chacuk
Keyword(s):  
Carbon Dioxide ◽  
Reaction Kinetics ◽  
Rate Constants ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Stopped Flow ◽  
First Order ◽  
Pseudo First Order ◽  
Kinetics Of ◽  
Good Agreement

Reaction Kinetics of Carbon Dioxide in Aqueous Diethanolamine Solutions Using the Stopped-Flow Technique The pseudo-first-order rate constants (kOV) for the reactions between CO2 and diethanolamine have been studied using the stopped-flow technique in an aqueous solution at 293, 298, 303 and 313 K. The amine concentrations ranged from 167 to 500 mol·m-3. The overall reaction rate constant was found to increase with amine concentration and temperature. Both the zwitterion and termolecular mechanisms were applied to correlate the experimentally obtained rate constants. The values of SSE quality index showed a good agreement between the experimental data and the corresponding fit by the use of both mechanisms.

scholarly journals Kinetics of CH3COOOH formation from CH3COOH + H2O2 reaction in the presence of H+ ion

2018 ◽  
Vol 34 (2) ◽  
Author(s):  
Vu Ngoc Duy
Keyword(s):  
Experimental Data ◽  
Acetic Acid ◽  
Peracetic Acid ◽  
Batch Reactor ◽  
Acid Formation ◽  
Rate Law ◽  
First Order ◽  
Reaction Orders ◽  
Kinetics Of ◽  
Solution Volume

Kinetics of peracetic acid formation in the reaction between acetic acid and hydro peroxide was investigated in this study. Experiments were conducted in a batch-reactor with a solution volume of 50 mL at 25 ± 1 oC. Concentrations of acetic acid and hydro peroxide are 10.5 M and 4.2 M, respectively.  The effect of H+ ion on the reaction was evaluated in the range from  0.036 to 0.72 M. The formation of peracetic acid was followed by iod - thiosulfate titration with starch indicator. Experimental data were analyzed using reversible first -order rate law to get reaction orders of H+ and H2O2 to be 1

Determination of the Intrinsic Gasification Kinetics of a Bituminous Coal Including Product Gas Inhibition and Char Deactivation Under Entrained Flow Conditions

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Tobias Netter ◽  
Andreas Geißler ◽  
Hartmut Spliethoff
Keyword(s):  
Carbon Dioxide ◽  
Reaction Kinetics ◽  
Residence Time ◽  
Bituminous Coal ◽  
Steam Gasification ◽  
Flow Conditions ◽  
Entrained Flow ◽  
Product Gas ◽  
Kinetics Of

Abstract This work provides experimentally obtained data concerning the gasification of bituminous coal under entrained-flow conditions. The main focus lies on the determination of reaction kinetics with and without product gas inhibition as well as on thermal deactivation behavior. For this reason, experiments were carried out in a pressurized high-temperature entrained-flow reactor. The reactor is designed for temperatures of up to 1800 °C and pressures of up to 50 bar. In this study, char samples with different residence times at temperatures between 1200 °C and 1600 °C and a pressure of 10 bar were obtained. Pyrolysis experiments were performed in pure nitrogen, while an O/C ratio of one was selected for the gasification. In addition to ultimate, proximate, and structural analyses of the char samples, e.g., to calculate conversion according to the ash tracer method, intrinsic reaction kinetics of the pyrolysis chars with carbon dioxide and steam were determined in a high-pressure thermogravimetric analyzer. The influence of carbon monoxide inhibition on carbon dioxide gasification and of hydrogen on steam gasification was quantified using the Langmuir–Hinshelwood equation. Further, the deactivation behavior of the pyrolysis chars was analyzed by measuring their reactivities under constant reaction conditions and plotting them as a function of residence time. The presented results give an overview about factors like temperature, pressure, gas composition, and residence time affecting fuel conversion. Furthermore, constants describing the reaction behavior of the fuel were determined, which can be used for future simulation of gasification processes.

The Determination of Exchangeable Bases in Carbonate Soils.

1932 ◽  
Vol 22 (4) ◽  
pp. 838-844 ◽  
Author(s):  
Rice Williams
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Exchangeable Bases

A method for determining the total exchangeable bases of carbonate soils is described. The carbonate in a known weight of soil is decomposed by acetic acid and the carbon dioxide evolved is estimated. By further extraction with acetic acid a solution is obtained which contains not only the bases originally in combination with the carbon dioxide but also the exchangeable bases. The amount of the latter is found by difference.

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