31 Result(s)
-
Article
Influence of Self-Heating on the Kinetics of an Exothermal Reaction under Isothermal Conditions
Estimates are made showing that when an exothermal reaction proceeds in an isothermal medium (in a thermostat), self-heating occurs, whose values are determined by the competition between the processes of heat...
-
Article
Mathematical Simulation of the Exothermal Chemical Interaction in a Plug Reactor Containing Emulsion Under the Influence of Gravitational Forces
Mathematical models of the dynamic behavior of a multivelocity heterogeneous reacting medium in a plug flow reactor are formulated. The correctness of the mathematical model is studied. A particular analytical...
-
Article
Modeling an Exothermal Chemical Transformation in a Countercurrent Plug Reactor
A mathematical model of an exothermal chemical transformation in a concurrent plug reactor is formulated. A criterion for the independence of the interaction of bubbles (drops) when they move in a dispersion m...
-
Article
Relationship of the Impact Sensitivity of Explosives with the Thermal Decomposition Reaction
By the example of 14 compounds representing the main classes of explosives containing H, C, N, and O, it has been shown that the impact sensitivity correlates with the critical temperature Tcr of spontaneous igni...
-
Article
Oscillation Modes in a Flow-Through Reactor of Ideal Mixing: A Heterogeneous Liquid–Liquid System
The mechanism and evolution of the oscillatory modes are studied for a single high-temperature stationary state of a flow-through reactor of ideal mixing with a heterogeneous reacting liquid–liquid system, wit...
-
Article
The Multiplicity and Types of Steady States for a Continuous Stirred-Tank Reactor: a Liquid–Liquid Heterogeneous System
The types of the steady states for a continuous stirred-tank reactor are studied depending on the process parameters, in particular, a parameter not affecting the position of the steady states, by way of examp...
-
Article
Types of Steady States of a Continuous Stirred-Tank Reactor: Liquid–Liquid Heterogeneous System
The topology and stability of steady states of a continuous stirred-tank reactor were studied for a liquid–liquid heterogeneous system in which an exothermic reaction occurs. It was shown that the heat of the ...
-
Article
On the Thermal Explosion Theory of a Heterogeneous Liquid–Liquid System
In this paper, the regularities of a thermal explosion of a heterogeneous system consisting of two immiscible liquids have been studied. Each phase is a solution of A and B reagents. Reagent B is extracted int...
-
Article
Steady States of a Plug Flow Reactor Operating on a Heterogeneous Liquid−Liquid System
A plug flow reactor operating on a heterogeneous liquid−liquid system in which an exothermic bimolecular reaction takes place is modeled. The effect of the main governing parameters (Peclet and Damkheler numbe...
-
Article
Thermal modes of a plug flow reactor with a liquid–liquid heterogeneous system
The thermal modes of a flow plug reactor with an exothermic chemical reaction are numerically simulated. A heterogeneous reaction system consisting of two immiscible liquids is studied: one of the liquids (dis...
-
Article
Thermal explosion of a liquid−solid heterogeneous system in a semibatch reactor
The results of investigation of the characteristics of thermal explosion in a semibatch reactor filled with a liquid−solid heterogeneous exothermic system are presented. Two successive macroscopic stages in th...
-
Article
Thermal explosion in a batch reactor charged with a liquid–solid heterogeneous system
The characteristics of a thermal explosion in an ideal mixing batch reactor charged with a liquid–solid heterogeneous system are studied. The reactor initially contains both phases. The solid reagent dissolves...
-
Article
On a nonstationary theory of thermal explosion in a semi-batch reactor. Homogeneous systems
A thermal explosion in a semi-batch ideal-mixing reactor in which a homogeneous sequential exothermic reaction occurs is numerically simulated. It is shown that the critical condition of a thermal explosion, s...
-
Article
Method of delivery of methane from seafloor deposits of solid hydrates to the surface
A model of the process of methane delivery from seafloor deposits of solid hydrates to the surface has been developed and approved. The model considers methane delivery through a vertical pipe lowered from the...
-
Article
Thermal ignition of a heterogeneous system in a stirring semibatch reactor
The thermal ignition of a heterogeneous two-phase system of two immiscible liquids in a stirring semibatch reactor was modeled. The model took into account the dispersion of one phase in the other, the mass tr...
-
Article
Steady-state mode of operation of the countercurrent reactor. Liquid-liquid heterogeneous system
A two-temperature model of the countercurrent plug-flow reactor for two chemically interacting liquids, the dispersion (continuous) media and dispersed phase, is developed. It is shown that there is a critical...
-
Article
Thermal explosion in semi-batch reactors
The problem of thermal explosion in a semi-batch reactor is solved. The critical conditions for the thermal explosion are studied. It is shown that the ignition resulting from the chemical reaction is possible...
-
Article
Consecutive reactions in a countercurrent plug-flow reactor. Gas-liquid system
A mathematical model of a bimolecular two-step consecutive exothermic reaction in the liquid phase of a gas-step consecutive exothermic reaction in the liquid phase of a gas-flow reactor is proposed. Spatial p...
-
Article
Self-oscillations in a flow ideal mixing reactor in the region of multiplicity of stationary equilibrium states: a consecutive reaction
A model of a flow ideal mixing reactor for a consecutive two-stage exothermic first-order reaction was considered. The presence of a region of multiplicity of stationary states was established. This multiplici...
-
Article
Thermal regimes of a counterflow reactor: a gas-liquid system
A counterflow reactor model for a system of two phases one of which involves an exothermic bimolecular reaction is considered. At a stationary temperature distribution in the reactor, there are high and low he...
