Special characteristics of nonisothermal processes in systems with parallel reactions with linear heating

1978 ◽  
Vol 14 (6) ◽  
pp. 776-780 ◽  
Author(s):  
V. T. Gontkovskaya ◽  
N. I. Ozerkovskaya ◽  
V. V. Barzykin ◽  
S. V. Pestrikov
Keyword(s):  
Linear Heating ◽  
Parallel Reactions

Nonisothermal processes in a system with serial and parallel reactions under conditions of linear heating

1982 ◽  
Vol 18 (3) ◽  
pp. 315-320 ◽  
Author(s):  
V. T. Gontkovskaya ◽  
V. A. Kolpakov
Keyword(s):  
Linear Heating ◽  
Parallel Reactions

An alternative method for the evaluation of integral dependent on parameter E in classical non-isothermal kinetics with linear heating rate

1991 ◽  
Vol 37 (1) ◽  
pp. 203-205
Author(s):  
R. K. Gartia ◽  
Th. Subodh Chandra Singh ◽  
P. S. Mazumdar
Keyword(s):  
Heating Rate ◽  
Isothermal Kinetics ◽  
Linear Heating ◽  
Alternative Method ◽  
Linear Heating Rate

Thermal explosion in a system with parallel reactions

1977 ◽  
Vol 13 (1) ◽  
pp. 40-46 ◽  
Author(s):  
V. G. Abramov ◽  
D. A. Vaganov ◽  
N. G. Samoilenko
Keyword(s):  
Thermal Explosion ◽  
Parallel Reactions

Surface cleaning of a commercially pure Ti, Ti6Al4V and Ti3Al8V6Cr4Zr4Mo alloys by linear heating

2006 ◽  
Vol 38 (4) ◽  
pp. 339-342 ◽  
Author(s):  
M. S. Dhlamini ◽  
H. C. Swart ◽  
J. J. Terblans ◽  
C. J. Terblanche
Keyword(s):  
Surface Cleaning ◽  
Linear Heating ◽  
Commercially Pure

Investigation of micromixing in stirred tank reactors using parallel reactions

1994 ◽  
Vol 33 (1) ◽  
pp. 41-55 ◽  
Author(s):  
John R. Bourne ◽  
Shengyao Yu
Keyword(s):  
Stirred Tank ◽  
Stirred Tank Reactors ◽  
Parallel Reactions

Modified ferron assay for speciation characterization of hydrolyzed Al(III): a precise k value based judgment

2009 ◽  
Vol 59 (4) ◽  
pp. 823-832 ◽  
Author(s):  
Ye Changqing ◽  
Wang Dongsheng ◽  
Wu Xiaohong ◽  
Qu Jiuhui ◽  
John Gregory
Keyword(s):  
Kinetic Constant ◽  
Nonlinear Least Squares ◽  
Precise Determination ◽  
K Value ◽  
First Order ◽  
First Order Kinetics ◽  
Parallel Reactions

The speciation of Al-OH complexes in terms of Ala, Alb and Alc could be achieved by traditional ferron assay and Alb is generally considered as Al13, however, the inherent correlation between them remains an enigma. This paper presents a modified ferron assay to get precise determination of Al13 using nonlinear least squares analysis, and to clarify the correlation between Alb and Al13. Two parallel reactions conforming to pseudo-first-order kinetics can simulate the complicate reactions between polynuclear complexes and ferron successfully. Four types of experimental kinetic constant (k value) of Al-OH complexes can be observed by this method when investigating three typical aluminium solutions. Comparing with the results of 27Al NMR, the species with moderate kinetics around 0.001 s−1 can be confirmed to resemble to Al13 polycation. The other types of kinetics are also well-regulated in partially neutralized aluminium solutions with various OH/Al ratios (b values) in the range 0 ∼ 2.5. It would provide potential means to trace the in-situ formation of Al13 in dilute solutions such as coagulation with Al-based coagulants

Structure Development During Linear Heating and Rate-Controlled Sintering of Ceramics: Statistical Model and Experiment

1997 ◽  
Vol 132-136 ◽  
pp. 674-677 ◽  
Author(s):  
A. Ragulya ◽  
Valeriy Skorokhod ◽  
M.G. Burenkov
Keyword(s):  
Statistical Model ◽  
Structure Development ◽  
Linear Heating ◽  
Rate Controlled

Kinetics of homogeneous chemical reactions

2005 ◽  
Author(s):  
Boris S. Bokstein ◽  
Mikhail I. Mendelev ◽  
David J. Srolovitz
Keyword(s):  
Chemical Reactions ◽  
Irreversible Thermodynamics ◽  
Kinetic Process ◽  
Chemical Reaction Kinetics ◽  
Long Time ◽  
Homogeneous Chemical ◽  
Parallel Reactions ◽  
Diffusive Processes ◽  
Kinetics Of

Kinetics considers the rates of different processes. Chemical kinetics refers to the rates and mechanisms of chemical reactions and mass transfer (diffusion). Recall that since thermodynamic equilibrium implies that the rates of all processes are zero, time is not a thermodynamic variable. Rather, time is the new parameter introduced by the consideration of kinetic processes. The rate of a kinetic process and how it depends on time is determined, in part, by the degree of the deviation from equilibrium. If the deviation from equilibrium is small, the rate decreases (without changing sign) as the system approaches equilibrium. If the deviation from equilibrium is large, the situation is more complicated. For example, non-monotonic (including oscillatory) processes are possible. The sign of the rate can change during such processes; that is, the reaction can proceed in one direction and then the other. Additionally, if the deviation from equilibrium is large, small changes to the system can produce very large changes in the rate of the kinetic process (i.e. chaos). Non-equilibrium, yet nearly stationary states of the system can arise (i.e. states that exist for a very long time). Finally, if the deviation from equilibrium is very large, the system can explode (i.e. the process continues to accelerate with time). In this chapter, we develop a formal description of the kinetics of rather simple chemical reactions. Consecutive and parallel reactions will also be considered here. A more general approach (irreversible thermodynamics) will be considered in Chapter 9. In Chapter 10, we examine diffusive processes. Then, in Chapter 11, we consider the kinetics of heterogeneous processes. In order to start the study of chemical reaction kinetics, we must first define what we mean by the rate of reaction. Consider the following homogeneous reaction: . . . Cl2 + 2NO → 2NOCl. (8.1) . . .

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