Acceder

Bibliografías temáticas / First order reaction / Artículos de revistas

Artículos de revistas sobre el tema "First order reaction"

Siga este enlace para ver otros tipos de publicaciones sobre el tema: First order reaction.

Autor: Grafiati

Publicado: 6 de septiembre de 2023

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores artículos de revistas para su investigación sobre el tema "First order reaction".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore artículos de revistas sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Ball, David. "Kinetics of Consecutive Reactions: First Reaction, First-Order; Second Reaction, Zeroth Order". Journal of Chemical Education 75, n.º 7 (julio de 1998): 917. http://dx.doi.org/10.1021/ed075p917.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Croce, A. E. "First-order parallel and consecutive reaction mechanisms — Isosbestic points criterium". Canadian Journal of Chemistry 86, n.º 9 (1 de septiembre de 2008): 918–24. http://dx.doi.org/10.1139/v08-098.

Texto completo

Resumen

A criterium for the selection of reaction mechanism derived from a condition for isosbestic points occurrence is presented. Analytical relationships involving the molar absorption coefficients of the species, which participate in a mechanism of parallel first-order reactions and the corresponding rate coefficients, are also reported. A model system of four species that present overlapping absorption spectra may correspond to the reactant and products of a system of parallel or consecutive first-order reactions. In the first case, under experimental conditions in which the absorbances are additive, the presence of an isosbestic point in the spectrum of the reaction mixture at a given wavelength leads to a time-independent ratio of the degree of advancement of reaction variables. From this, relevant kinetic information may be extracted, namely, the ratio of the reaction rate coefficients. Moreover, the occurrence of isosbestic points allows discarding the second mechanism. This conclusion is independent of the number of absorbing species. Model calculated examples show the application of the equations here derived. The resolution for the general case of mechanisms of N first-order reactions is provided.Key words: chemical kinetics, time-resolved absorption spectra, reaction mechanism.

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Boeker, E. A. "Integrated rate equations for irreversible enzyme-catalysed first-order and second-order reactions". Biochemical Journal 226, n.º 1 (15 de febrero de 1985): 29–35. http://dx.doi.org/10.1042/bj2260029.

Texto completo

Resumen

Integrated rate equations are presented that describe irreversible enzyme-catalysed first-order and second-order reactions. The equations are independent of the detailed mechanism of the reaction, requiring only that it be hyperbolic and unbranched. The results should be directly applicable in the laboratory.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Vinnett, Luis y Kristian E. Waters. "Representation of Kinetics Models in Batch Flotation as Distributed First-Order Reactions". Minerals 10, n.º 10 (15 de octubre de 2020): 913. http://dx.doi.org/10.3390/min10100913.

Texto completo

Resumen

Four kinetic models are studied as first-order reactions with flotation rate distribution f(k): (i) deterministic nth-order reaction, (ii) second-order with Rectangular f(k), (iii) Rosin–Rammler, and (iv) Fractional kinetics. These models are studied because they are considered as alternatives to the first-order reactions. The first-order representation leads to the same recovery R(t) as in the original domain. The first-order R∞-f(k) are obtained by inspection of the R(t) formulae or by inverse Laplace Transforms. The reaction orders of model (i) are related to the shape parameters of first-order Gamma f(k)s. Higher reaction orders imply rate concentrations at k ≈ 0 in the first-order domain. Model (ii) shows reverse J-shaped first-order f(k)s. Model (iii) under stretched exponentials presents mounded first-order f(k)s, whereas model (iv) with derivative orders lower than 1 shows from reverse J-shaped to mounded first-order f(k)s. Kinetic descriptions that lead to the same R(t) cannot be differentiated between each other. However, the first-order f(k)s can be studied in a comparable domain.

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Strieder, William. "Chemoreceptor diffusion and reaction: first-order kinetics". Chemical Engineering Science 55, n.º 14 (abril de 2000): 2579–84. http://dx.doi.org/10.1016/s0009-2509(99)00538-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Riazi, Mohammad R. y Amir Faghri. "Solid dissolution with first-order chemical reaction". Chemical Engineering Science 40, n.º 8 (1985): 1601–3. http://dx.doi.org/10.1016/0009-2509(85)80105-6.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Wu, Xizun, Wenzhi Zhang, Shengmin Cai y Degang Han. "A Method for Estimation of Kinetic Parameters; A Simple First-Order Reaction and Two Parallel First-Order Reactions Producing a Common Product". Collection of Czechoslovak Chemical Communications 57, n.º 6 (1992): 1196–200. http://dx.doi.org/10.1135/cccc19921196.

Texto completo

Resumen

A method is proposed for the treatment of data from a kinetic system of a simple first-order reaction and two parallel first-order reactions, producing a common product. It is based on the solving of a contrary proposition for an ordinary differential equation.

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Vajda, S. y H. Rabitz. "Identifiability and distinguishability of first-order reaction systems". Journal of Physical Chemistry 92, n.º 3 (febrero de 1988): 701–7. http://dx.doi.org/10.1021/j100314a024.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Tóbiás, Roland, László L. Stacho y Gyula Tasi. "First-order chemical reaction networks I: theoretical considerations". Journal of Mathematical Chemistry 54, n.º 9 (14 de junio de 2016): 1863–78. http://dx.doi.org/10.1007/s10910-016-0655-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Chau, F. T. y K. W. Mok. "Multiwavelength analysis for a first-order consecutive reaction". Computers & Chemistry 16, n.º 3 (julio de 1992): 239–42. http://dx.doi.org/10.1016/0097-8485(92)80009-o.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

GADGIL, C., C. LEE y H. OTHMER. "A stochastic analysis of first-order reaction networks". Bulletin of Mathematical Biology 67, n.º 5 (septiembre de 2005): 901–46. http://dx.doi.org/10.1016/j.bulm.2004.09.009.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Robbins, D. J., A. J. Almquist, D. C. Timm, J. I. Brand y R. E. Gilbert. "Experimental Evaluation of Nonisothermal, First-Order Reaction Kinetics". Macromolecules 28, n.º 26 (diciembre de 1995): 8729–34. http://dx.doi.org/10.1021/ma00130a004.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Vrentas, J. S. y C. M. Vrentas. "Unsteady diffusion with a first-order homogeneous reaction". AIChE Journal 33, n.º 1 (enero de 1987): 167–68. http://dx.doi.org/10.1002/aic.690330122.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Klump, H. H. "Energetics of order/order transitions in nucleic acids". Canadian Journal of Chemistry 66, n.º 4 (1 de abril de 1988): 804–11. http://dx.doi.org/10.1139/v88-140.

Texto completo

Resumen

Besides the temperature induced canonical helix to random coil transition, which serves as a prototype of an order/disorder transition, there is a second group of conformational changes in helical polynucleotides, which will be termed order/order transitions. Depending on the environmental conditions and the sequence of the polynucleotides involved, there are four alternative reaction schemes: (i) The inversion of the helical handedness from a right-handed to a left-handed conformation, (ii) the disproportionation of a double helix into a single strand and a triple helix, (iii) the addition of a single strand to a double helix, and (iv) the single/double strand displacement reactions, that is, the displacement of one of the two strands of the helix by a matching single-stranded polynucleotide or the mutual exchange of one strand each between two helical structures. The first three reactions are considered reversible while the last reaction is irreversible; that is, one cannot regain the initial state by inversing the course of the change, here the change in temperature. Both ribo and deoxyribo polynucleotides can undergo these reactions. In the following paper at least one example is given for each of these reactions.

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Offurum, J. C., M. M. Chukwu, C. A. Mbadike, T. U. Nwaneri y A. A. Nwakaudu. "JUSTIFICATION OF ORDER OF CORROSION INHIBITION KINETICS FOR ESTERS OF CASTOR AND RUBBER SEED OILS". JOURNAL OF THE NIGERIAN SOCIETY OF CHEMICAL ENGINEERS 37, n.º 1 (1 de abril de 2022): 88–93. http://dx.doi.org/10.51975/22370108.som.

Texto completo

Resumen

The present study centres on the justification of order of corrosion inhibition kinetics for esters of castor and rubber seed oils. Inhibition of mildsteel corrosion was studied in the presence of sulphuric acid medium. The study was justified by the regular misprediction of order of chemical reactions (especially corrosion reaction), due to varying individual perceptions in this regard. While many researchers assume that corrosion reaction kinetics is of first order in most cases, others resolve that it is of zero or even second order. Experimental (gravimetric) data from the mildsteel corrosion inhibition process was used to generate the kinetic data at different experimental conditions of 10g/l (concentration), 40oC (temperature) and 50% stroke (pressure), at different times of 4, 8, 16, 24 and 32hours. Equations of the lines were generated, and coefficient of determination, R2 values for the different (derived) kinetic equations (zero, first and second orders) were obtained. While R2 values for zero order curves fall between 0.9250 – 0.9790, those of first order fall between 0.9740 – 0.9880, and those of second order fall between 0.7820 – 0.9520, which indicates that the R2 values of first order kinetics tend more towards unity than those of zero and second orders. This implies that the corrosion reaction, generally, is governed by the postulations of first order kinetics, followed by the zero order and, then, second order. The results, therefore, justify that kinetics of corrosion reactions is (always) of first order. Keywords: Corrosion inhibition, Justification, Kinetics, Order of reaction.

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Balogh, Ágnes, Gábor Lente, József Kalmár y István Fábián. "Reaction Schemes That Are Easily Confused with a Reversible First-Order Reaction". International Journal of Chemical Kinetics 47, n.º 12 (23 de octubre de 2015): 773–82. http://dx.doi.org/10.1002/kin.20960.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Evans, J. W. y M. S. Miesch. "Catalytic reaction kinetics near a first-order poisoning transition". Surface Science 245, n.º 3 (abril de 1991): 401–10. http://dx.doi.org/10.1016/0039-6028(91)90042-q.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Evans, J. W. y M. S. Miesch. "Catalytic reaction kinetics near a first-order poisoning transition". Surface Science Letters 245, n.º 3 (abril de 1991): A146. http://dx.doi.org/10.1016/0167-2584(91)90784-o.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Yih, Siu-Ming. "Comments on solid dissolution with first-order chemical reaction". Chemical Engineering Science 42, n.º 5 (1987): 1269. http://dx.doi.org/10.1016/0009-2509(87)80086-6.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Chrastil, Joseph. "Determination of the first-order consecutive reversible reaction kinetics". Computers & Chemistry 17, n.º 1 (marzo de 1993): 103–6. http://dx.doi.org/10.1016/0097-8485(93)80035-c.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Obrazovskiĭ, E. G. "Diffusion-controlled first-order surface reaction in turbulent flow". Journal of Experimental and Theoretical Physics 103, n.º 1 (julio de 2006): 119–25. http://dx.doi.org/10.1134/s1063776106070132.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Giona, Massimiliano. "First-order reaction—diffusion kinetics in complex fractal media". Chemical Engineering Science 47, n.º 6 (1992): 1503–15. http://dx.doi.org/10.1016/0009-2509(92)80295-n.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Kiss, Virág y Katalin Ősz. "Double Exponential Evaluation under Non-Pseudo-First-Order Conditions: A Mixed Second-Order Process Followed by a First-Order Reaction". International Journal of Chemical Kinetics 49, n.º 8 (12 de junio de 2017): 602–10. http://dx.doi.org/10.1002/kin.21100.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Katritzky, Alan R. y Bogumil Brycki. "Kinetics and mechanism of nucleophilic displacements with heterocycles as leaving groups. Part 23. Studies at the borderlines between reactions proceeding (i) via free carbocations, (ii) via rate-determining formation of ion–molecule pairs, and (iii) via rate-determining nucleophilic attack on ion–molecule pairs". Canadian Journal of Chemistry 64, n.º 6 (1 de junio de 1986): 1161–69. http://dx.doi.org/10.1139/v86-192.

Texto completo

Resumen

Evidence is presented to demonstrate that at the borderline between first-order reaction via nucleophilic trapping of intimate ion–molecule pairs and first-order reaction via the formation of free carbocations, both mechanisms proceed independently, without merging. Similarly at the borderline between first-order (rate-determining formation) and second-order (rate-determining nucleophilic attack) reactions of intimate ion–molecule pairs, both reactions again proceed independently.

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Hutchinson, Claire V. y Tim Ledgeway. "Temporal frequency modulates reaction time responses to first-order and second-order motion." Journal of Experimental Psychology: Human Perception and Performance 36, n.º 5 (2010): 1325–32. http://dx.doi.org/10.1037/a0019250.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Šolc, Milan. "The first passage time to the equilibrium state of a first order reaction". Collection of Czechoslovak Chemical Communications 52, n.º 1 (1987): 1–5. http://dx.doi.org/10.1135/cccc19870001.

Texto completo

Resumen

The first passage time to the state of exact equilibrium (the most probable stationary state) for a first order reaction is described in terms of the probability density and the first and second moments. For large systems, the first moment is proportional to the logarithm of the number of particles in the system, while the dispersion is independent of the size of the system.

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

YUANQING, ZHANG, ZENG XIANCHENG, CHENG SIQING, YU XIAOQI y TIAN ANMING. "MICELLAR CATALYSIS OF COMPOSITE REACTIONS I MICELLAR EFFECT ON THE CONSECUTIVE FIRST ORDER REACTION". Journal of Dispersion Science and Technology 20, n.º 3 (abril de 1999): 1009–24. http://dx.doi.org/10.1080/01932699908943831.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Filimonov, Valeriy Yu. "Critical ignition conditions in exothermically reacting systems: first-order reactions". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, n.º 2206 (octubre de 2017): 20170145. http://dx.doi.org/10.1098/rspa.2017.0145.

Texto completo

Resumen

In this paper, the comparative analysis of the thermal explosion (TE) critical conditions on the planes temperature–conversion degree and temperature–time was conducted. It was established that the ignition criteria are almost identical only at relatively small values of Todes parameter. Otherwise, the results of critical conditions analysis on the plane temperature–conversion degree may be wrong. The asymptotic method of critical conditions calculation for the first-order reactions was proposed (taking into account the reactant consumption). The degeneration conditions of TE were determined. The calculation of critical conditions for specific first-order reaction was made. The comparison of the analytical results obtained with the results of numerical calculations and experimental data showed that they are in good agreement.

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Higham, Desmond J. y Raya Khanin. "Chemical Master versus Chemical Langevin for First-Order Reaction Networks". Open Applied Mathematics Journal 2, n.º 1 (3 de junio de 2008): 59–79. http://dx.doi.org/10.2174/1874114200802010059.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Rademacher, Jens D. M. "First and Second Order Semistrong Interaction in Reaction-Diffusion Systems". SIAM Journal on Applied Dynamical Systems 12, n.º 1 (enero de 2013): 175–203. http://dx.doi.org/10.1137/110850165.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Darowicki, K. y P. Ślepski. "Dynamic electrochemical impedance spectroscopy of the first order electrode reaction". Journal of Electroanalytical Chemistry 547, n.º 1 (abril de 2003): 1–8. http://dx.doi.org/10.1016/s0022-0728(03)00154-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Sheplev, V. S., S. A. Treskov y E. P. Volokitin. "Dynamics of a stirred tank reactor with first-order reaction". Chemical Engineering Science 53, n.º 21 (noviembre de 1998): 3719–28. http://dx.doi.org/10.1016/s0009-2509(98)00164-x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Amo-Salas, Mariano, Raúl Martín-Martín y Licesio J. Rodríguez-Aragón. "Design of experiments for zeroth and first-order reaction rates". Biometrical Journal 56, n.º 5 (19 de mayo de 2014): 792–807. http://dx.doi.org/10.1002/bimj.201300210.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Gitterman, Moshe y George H. Weiss. "A class of exactly solvable reaction-diffusion equations with first-order distributed reaction rates". Chemical Physics Letters 193, n.º 6 (junio de 1992): 469–72. http://dx.doi.org/10.1016/0009-2614(92)85833-v.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Coppens, Marc-Olivier y Gilbert F. Froment. "Diffusion and reaction in a fractal catalyst pore—II. Diffusion and first-order reaction". Chemical Engineering Science 50, n.º 6 (marzo de 1995): 1027–39. http://dx.doi.org/10.1016/0009-2509(94)00479-b.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Selimović, Enisa y Tanja Soldatović. "Study on the reactions between dichlorido[2,2′:6′,2″-terpyridine] zinc(II) and biologically relevant nucleophiles in aqueous solution". Progress in Reaction Kinetics and Mechanism 44, n.º 2 (22 de abril de 2019): 105–13. http://dx.doi.org/10.1177/1468678319825724.

Texto completo

Resumen

Substitution reactions of square-pyramidal [ZnCl2(terpy)] complex (terpy = 2,2′:6′,2″-terpyridine) with biologically relevant nucleophiles such as imidazole, glutathione, 1,2,4-triazole, and pyrazine were investigated at pH 7.0 as a function of nucleophile concentration. The reactions were followed under pseudo first-order conditions by UV-Vis spectrophotometry. The substitution reactions comprised two steps of consecutive displacement of chlorido ligands. Different reaction pathways for the first reaction step of nucleophilic substitution were defined. The order of reactivity of the investigated nucleophiles for the first reaction was imidazole > glutathione > pyrazine > 1,2,4-triazole, while for the second reaction step it was pyrazine > 1,2,4-triazole > imidazole > glutathione.

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Fellner, Klemens, Wolfang Prager y Bao Q. Tang. "The entropy method for reaction-diffusion systems without detailed balance: First order chemical reaction networks". Kinetic & Related Models 10, n.º 4 (2017): 1055–87. http://dx.doi.org/10.3934/krm.2017042.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Favorite, Jeffrey A. "SENSMG: First-Order Sensitivities of Neutron Reaction Rates, Reaction-Rate Ratios, Leakage,keff, andαUsing PARTISN". Nuclear Science and Engineering 192, n.º 1 (23 de julio de 2018): 80–114. http://dx.doi.org/10.1080/00295639.2018.1471296.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Tsao, Heng-Kwong. "Diffusion into a pair of reactive spheres with first-order reaction". Journal of Chemical Physics 114, n.º 23 (15 de junio de 2001): 10247–51. http://dx.doi.org/10.1063/1.1375138.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

STRAJA, SORIN. "PARAMETERS ESTIMATION FOR A FIRST ORDER IRREVERSIBLE REACTION. A STOCHASTIC APPROACH". Chemical Engineering Communications 124, n.º 1 (junio de 1993): 165–75. http://dx.doi.org/10.1080/00986449308936184.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

OLIVER, D. L. R. y K. J. DE WITT. "MASS TRANSFER TO A DROPLET WITH A FIRST-ORDER CHEMICAL REACTION". Chemical Engineering Communications 135, n.º 1 (15 de mayo de 1995): 63–69. http://dx.doi.org/10.1080/00986449508936338.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Mitrovic, Bojan M. y Dimitrios V. Papavassiliou. "Effects of a first-order chemical reaction on turbulent mass transfer". International Journal of Heat and Mass Transfer 47, n.º 1 (enero de 2004): 43–61. http://dx.doi.org/10.1016/s0017-9310(03)00380-6.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Retsloff, David G., Paul C.-H. Chan y B. Youssef Bisbis. "Sequential bifurcations, maximum multiplicity, and chaos for a first order reaction". Mathematical and Computer Modelling 11 (1988): 370–74. http://dx.doi.org/10.1016/0895-7177(88)90517-1.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Frisch, H. L. "Diffusion with first-order reaction with a time-dependent rate coefficient". Journal of Colloid and Interface Science 153, n.º 1 (octubre de 1992): 292–93. http://dx.doi.org/10.1016/0021-9797(92)90320-l.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Li, Genyuan y Herschel Rabitz. "Determination of constrained lumping schemes for nonisothermal first-order reaction systems". Chemical Engineering Science 46, n.º 2 (1991): 583–96. http://dx.doi.org/10.1016/0009-2509(91)80018-t.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Caballero, N. B., A. E. Croce, E. Pensa y C. Vicente Irrazábal. "The analytical resolution of parallel first- and second-order reaction mechanisms". International Journal of Chemical Kinetics 42, n.º 9 (22 de junio de 2010): 562–66. http://dx.doi.org/10.1002/kin.20502.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Sun, Yunwei, Thomas A. Buscheck y Yue Hao. "Modeling reactive transport using exact solutions for first-order reaction networks". Transport in Porous Media 71, n.º 2 (13 de abril de 2007): 217–31. http://dx.doi.org/10.1007/s11242-007-9121-8.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Antić, V. V., M. P. Antić, M. N. Govedarica y P. R. Dvornić. "Kinetics of the Formation of Poly(Methyldecylsiloxane) by Hydrosilylation of Poly(Methylhydrosiloxane) and 1-Decene". Materials Science Forum 555 (septiembre de 2007): 485–90. http://dx.doi.org/10.4028/www.scientific.net/msf.555.485.

Texto completo

Resumen

Poly(methylhydrosiloxane) [PMHS], prepared by siloxane equilibration reaction, was used for the hydrosilylation with 1-decene to obtain poly(methyldecylsiloxane) [PMDS]. Pt(0)-1,3- divinyltetramethyldisiloxane complex was used as a catalyst for hydrosilylation reaction. In order to investigate the kinetics of the formation of PMDS, a series of experiments was performed at different reaction temperatures (from 48 to 64 °C) with catalyst concentrations of 7.0 · 10-7 mol of Pt per mol of CH=CH2. All reactions were carried out in bulk, with equimolar amounts of the reacting Si-H and CH=CH2 groups. The course of the reactions was monitored by following the disappearance of the Si-H bands by quantitative infrared spectroscopy. The obtained results show that an induction period occurs at lower reaction temperatures and that the rate of Si-H conversion follows the first-order kinetics.

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Fan, Xiaoming. "Exponential Attractor for a First-Order Dissipative Lattice Dynamical System". Journal of Applied Mathematics 2008 (2008): 1–8. http://dx.doi.org/10.1155/2008/354652.

Texto completo

Resumen

We construct an exponential attractor for a first-order dissipative lattice dynamical system arising from spatial discretization of reaction-diffusion equations in . And we obtain fractal dimension of the exponential attractor.

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Yusnimar. "KINETIC MODELING STUDY FOR ACYLATION REACTION OF O-XYLENE TO 3,4-DIMETHYLBENZOPHENONE OVER H-BETA". Jurnal Riset Kimia 1, n.º 1 (11 de febrero de 2015): 89. http://dx.doi.org/10.25077/jrk.v1i1.100.

Texto completo

Resumen

ABSTRACTThe reaction of o-xylene with benzoic anhydride has been studied by the changing molar ratio of the reactants (20:1, 10:1, and 5:1) in a batch reactor under reaction temperature 120oC. The reaction carried out without catalyst and also with catalyst Zeolite beta which was activated at 300oC overnight. HPLC analysis results showed that the yield of the product increase with the changing molar ratio of the reactants. An attempt was made in determining the kinetics of the reaction. The results show that the reaction is neither first nor second order in the acylating agent. Obtaining the reaction order even initially is unsuitable for even simple reactions that do not go to completion. It is even less applicable where more than a single process which affects the rate is taking place right from the start. These might be any one or combination of diffusion, adsorption, desorption, inhibition of the reaction by the product and multi step reactions on the surface. Postulated reaction mechanisms may be required in combination with experimental data to determine even initial reaction orders. Key words: o-xylene, catalyst, kinetics, reaction order.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!