Second-order reaction adiabatic

A second order reaction is performed adiabatically in a CESTR. Use die data in Example 6-11 to plot bodi conversions for die mass and heat balance equations. The second order rate constant k is... 

The electronic wave function has now been removed from the first two terms while the curly bracket contains tenns which couple different electronic states. The first two of these are the first- and second-order non-adiabatic coupling elements, respectively, vhile the last is the mass polarization. The non-adiabatic coupling elements are important for systems involving more than one electronic surface, such as photochemical reactions. 

The kinetic rate constant may be computed from the adiabatic temperature rise [38] or the isothermal heat release [37]. For a second order reaction ... 

For the gas-phase, second-order reaction C2H4 + C4H6 - CgHio (or A + B - C) carried out adiabatically in a 2-liter experimental CSTR at steady-state, what should the temperature (T/K) be to achieve 40% conversion, if the (total) pressure (P) is 1.2 bar (assume constant), the feed rate (q0) is 20 cm3 s-1, and.. the reactants are equimolar in the feed. The Arrhenius parameters are EA = 115,000 J mol-1 and A =3.0x 107L mol-1s-1 (Rowley and Steiner, 1951 see Example 4-8). Thermochemical data are as follows (from Stull et al., 1969) ... 

P4.07-11. TWO STAGE ADIABATIC CSTR. SECOND ORDER REACTION. 

A second order reaction is done adiabatically in a CSTR. Data for the system are ... 

Very recently Fontijn and Rosner145a have offered another explanation for the upper-atmosphere and wind-tunnel experiments. They propose that when the NO is adiabatically expanded, clustering (polymerization and perhaps condensation) occurs. Thus the third-order reaction (81) behaves as a second-order reaction, and has a correspondingly larger third-order rate constant. 

A second order reaction- is conducted adiabatically in a material and energy balances are,... 

B. Example CD8-2 Second Order Reaction Carried Out Adiabatically... 

The phase plane of Ca vs. T shows a sepaiatrix. [2nd Ed. P8-22] CDP8-iV An acid-catalyzed second-order reaction is carried out adiabatically in a CSTR. 

An endothermic irreversible second-order reaction 2A-tor. The reaction mixture is heated to an initial temperature of 450°C. The reaction then proceeds adiabatically. Calculate the time required to reach a conversion of 80%. The initial concentration of A is kmol/m. The fluid density is p = 995 kg/m. The mean... 

Keairns and Manning AIChE J., 15 (660), 1969] have used the reaction between sodium thiosulfate and hydrogen peroxide in a well-stirred flow reactor to check a computer simulation of adiabatic CSTR operation. Data on their experimental conditions and the reaction parameters are listed below. The reaction may be considered second-order in sodium thiosulfate. 

A two stage CSTR is used for a first order reaction. The first stage is adiabatic whereas the second is kept at the exit temperature of the first. These data are available. 

The flame speed for a combustible hydrocarbon-air mixture is known to be 30cm/s. The activation energy of such hydrocarbon reactions is generally assumed to be 160kJ/mol. The true adiabatic flame temperature for this mixture is known to be 1600 K. An inert diluent is added to the mixture to lower the flame temperature to 1450 K. Since the reaction is of second-order, the addition of the inert can be considered to have no other effect on any property of the system. Estimate the flame speed after the diluent is added. 

If this reaction is conducted in an adiabatic CSTR, what is the reactor volume and space time necessary to achieve 35 percent conversion of N2O5 The reaction rate is first order in A and second order in B. 

The thermal-induced intramolecular electron transfer rates of mixed-valence biferrocene monocation (Fe(II),Fe(III)) were determined in seven solvents and at various temperatures by the proton paramagnetic relaxation measurements. The rate constants of pico-second order were obtained at 298 K and the frequency factors showed a solvent dependence. The effect of solvent friction on the barrier crossing in the reaction trajectory was examined in the strong adiabatic regime. 

The Arrhenius equation and the energy balance equation were used to obtain a modified version of the equation for the second order adiabatic reaction kinetics. 

The second order adiabatic reaction kinetic equation was obtained by combining Equations 1 and 2 ... 

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