scholarly journals Kinetic Features of the Process of Conversion of Propane to Aromatic Hydrocarbons

2021 ◽  
pp. 21-29
Author(s):  
Ludmila N. Vosmerikova ◽  
Anton A. Vosmeriko ◽  
Yakov E. Barbashin ◽  
Alexander V. Vosmerikov
Keyword(s):  
Kinetic Model ◽  
Chemical Reaction ◽  
Aromatic Hydrocarbons ◽  
Zeolite Catalyst ◽  
Propane Conversion ◽  
Reaction Behavior ◽  
Propane Aromatization ◽  
Kinetic Features

Kinetic features of the propane conversion into aromatic hydrocarbons over a gallium-containing zeolite catalyst have been investigated. On the basis of the experimentally obtained kinetic dependences and the available literature data, a kinetic model of propane aromatization is proposed, which makes it possible to form various variations of chemical reaction behavior and to calculate the most probable routes of propane conversion

scholarly journals Search for optimal conditions for a chemical reaction based on a kinetic model

2021 ◽  
Author(s):  
Евгения Антипина ◽  
Светлана Мустафина ◽  
Андрей Антипин
Keyword(s):  
Kinetic Model ◽  
Chemical Reaction ◽  
Optimal Conditions

Kinetic Model of Spherical Sponge Iron Reduced by Hydrogen

2012 ◽  
Vol 476-478 ◽  
pp. 1454-1458
Author(s):  
Jun Guo Li ◽  
Shou Zhang Li ◽  
Wei Tian
Keyword(s):  
Kinetic Model ◽  
Chemical Reaction ◽  
Reaction Rate ◽  
Direct Reduction ◽  
Effective Diffusion ◽  
Sponge Iron ◽  
Internal Diffusion ◽  
Weight Loss Curve ◽  
Chemical Reaction Rate Constant ◽  
Total Reaction

Spherical sponge iron (SSI) with high activity and intension could be prepared through direct reduction by hydrogen. To optimize the reduction technology, kinetic model of SSI reduction was established. The total reaction rate changing with reduction index R was deduced which describing the total reaction rate with effective diffusion coefficient De and chemical reaction rate constant k. According to the weight loss curve of SSI reduction, De and k were calculated. The total reactive rate increased with the increasing of temperature because both De and k increased with the increasing of reaction temperature. Compared De with k, it concluded that SSI reduced by hydrogen was controlled by the chemical reaction, combination of the chemical reaction and the internal diffusion, the internal diffusion when the temperature was lower than T3, from T3 to T4, over T5, respectively.

scholarly journals THE KINETIC MODEL OF THE REACTION OF OXIDATIVE DEHYDROGENATION OF CYCLOHEXANOL OVER MODIFIED ZEOLITE CATALYST

2017 ◽  
Vol 15 (3) ◽  
pp. 341-345
Author(s):  
A.M. Aliyev ◽  
◽  
Z.A. Shabanova ◽  
M.K. Aliyeva ◽  
G.A. Alizadeh ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Oxidative Dehydrogenation ◽  
Zeolite Catalyst ◽  
Modified Zeolite

scholarly journals Numerical analysis of parameter identifiability for a mathematical model of a chemical reaction

2018 ◽  
pp. 282-292
Author(s):  
Л.Ф. Нурисламова ◽  
И.М. Губайдуллин
Keyword(s):  
Kinetic Model ◽  
Chemical Reaction ◽  
Atmospheric Pressure ◽  
Numerical Approach ◽  
Primary Objective ◽  
Reaction Products ◽  
Parameter Identifiability ◽  
Reaction Models ◽  
Low Temperature Pyrolysis ◽  
Reaction Processes

Авторами статьи ведутся работы, направленные на разработку численного подхода к анализу параметрической идентифицируемости модели химической реакции методами анализа чувствительности для эффективного исследования и управления процессом химической реакции. Целью настоящей работы является определение параметров, подлежащих идентификации в условиях задаваемой погрешности измерений, химической реакции на примере процесса пиролиза пропана и определение незначимых параметров модели. Выполнена редукция 157-стадийной детальной схемы пиролиза пропана к 30-стадийной схеме. Предложена кинетическая модель для анализа низкотемпературного пиролиза пропана. Модель адекватно описывает выход наблюдаемых продуктов реакции при атмосферном давлении. Идентифицированы параметры кинетической модели пиролиза пропана путем решения обратной задачи химической кинетики. The authors of this paper develop a numerical approach to analyze the parametric identifiability of chemical reaction models by the methods of sensitivity analysis for the efficient study and management of chemical reaction processes. The primary objective of this paper is to determine the parameters to be identified for the propylene pyrolysis process and to determine the insignificant parameters of the model. The 157-step detailed pyrolysis scheme of propane is reduced to the 30-step scheme. A kinetic model is proposed to analyze the low-temperature pyrolysis of propane. This model adequately describes the yield of observed reaction products at atmospheric pressure. The parameters of the kinetic model of propane pyrolysis are identified by solving the inverse problem of chemical kinetics.

scholarly journals Kinetic study of propane aromatization over Zn/HZSM-5 zeolite under conditions of catalyst deactivation using genetic algorithm

2018 ◽  
Vol 83 (4) ◽  
pp. 473-488 ◽  
Author(s):  
Abbas Roshanaei ◽  
Mehdi Alavi
Keyword(s):  
Genetic Algorithm ◽  
Kinetic Model ◽  
Kinetic Parameters ◽  
Catalyst Deactivation ◽  
Flow Reactor ◽  
Plug Flow ◽  
Kinetic Studies ◽  
Space Velocity ◽  
Propane Aromatization ◽  
Aromatization Reaction

The kinetic studies of propane aromatization reaction over Zn/ /HZSM-5 catalyst at temperature of 500?560?C and space velocity of 500?2500 cm3 gcat -1 h-1, in a plug flow reactor, under catalyst deactivating conditions were performed. A lumped kinetic model consisting of six lumped components and six reaction steps was proposed to describe the aromatization of propane. The kinetic model involves 18 kinetic parameters and one catalyst deactivation constant. The reaction steps orders were obtained by the power law model. Frequency factors and the apparent activation energies of the reaction steps were calculated based on the Arrhenius equation. An exponential function depending on the time-on-stream was applied for the catalyst deactivation model and the kinetic parameters were calculated via a genetic algorithm. The kinetic results indicated that the lumped kinetic model can well estimate the product yields of propane aromatization.

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