Temperature reactor, effect

Figure 7. Tubular plug-flow addition polymer reactor effect of the frequency factor (ka) of the initiator on the molecular weight-conversion relationship at constant activation energy (Ea). Each point along the curves represents an optimum initiator feed concentration-reactor jacket temperature combination and their values are all different, (Ea = 32.921 Kcal/mol In ka = 35,000 In sec ...

In the present study, the pyrolysis of a waste polystyrene plastic (PSP) has beat investigated in a swirling fluidized-bed reactor to develop an effective reactor. Effects of the reaction time, temperature, ratio of the swirling gas and the gas velocity on the yields of an oil and a styrene monomer have been discussed. 

Study the effect of varying mass transfer and heat transfer diffusivities (D and X, respectively) and hence Peclet numbers (Pi and P2) on the resulting dimensionless concentration and temperature reactor profiles. 

Table 4 Hydrogenolysis of AcOBu on lRelPt(e,red.) catalyst in SPR16 reactor. Effect of temperature and concentration on conversion and reaction rate.

Equation 8.3.4 is completely general and independent of whether the reaction occurs at constant density (dA = 0) and of whether the feed stream and the reactor contents have identical temperatures. The effective reactor volume is independent of the particular geometry giving rise to this volume. All that is required is that the contents be well mixed. 

Dunker, A., Kumar, S., and Mulawa, P., Production of hydrogen by thermal decomposition of methane in a fluidized bed reactor—effect of catalyst, temperature and residence time, Int.. Hydrogen Energ., 31, 473, 2006. 

The flow through a plug flow reactor effecting a first order reaction is increased by 20%. In order to maintain conversion at its former value, the temperature is to be raised. If the reaction has an activation energy of 4 kcal/gmol and the initial temperature is 150 C, what will be the new temperature Would the required elevation in temperature be different if the reactor were a CSTR ... 

RADIOLYSIS OF WATER AT ELEVATED TEMPERATURE—RADIATION EFFECT OF COOLANT WATER IN NUCLEAR REACTORS... 

In the first case (Figure 8a), the side walls are adiabatic, and the reactor height (2 cm) is low enough to make natural convection unimportant. The fluid-particle trajectories are not perturbed, except for the gas expansion at the beginning of the reactor that is caused by the thermal expansion of the cold gas upon approaching the hot susceptor. On the basis of the mean temperature, the effective Rayleigh number, Rat, is 596, which is less than the Rayleigh number of 1844 necessary for the existence of a two-dimensional, stable, steady-state solution with flow in the transverse direction that was computed for equivalent Boussinesq conditions (188). 

Choose a reaction from the literature that is similar to the reaction of this reactor, such as catalytic hydrogenation, and perform the above computations using MATLAB to obtain the concentrations, temperatures, and effectiveness factor profiles along the length of the reactor. 

Hydrogenic ion-induced blistering has been observed, but by itself will not likely present a problem to the first wall at elevated reactor operating temperatures. The effects of blistering at high primary fluxes such as those found at beam dumps and components of neutral beam injectors, divertor throats and bombardment plates, are not known. 

In the DCC unit, the hydrocarbon feed is dispersed with steam and cracked using a hot solid catalyst in a riser, and enters a fluidized bed reactor. A known injection system is employed to achieve the desired temperature and catalyst-to-oil contacting. This maximizes the selective catalytic reactions. The vaporized oil and catalyst flow up the riser to the reactor where the reaction conditions can be varied to complete the cracking process. The cyclones that are located in the top of the reactor effect the separation of the catalyst and the hydrocarbon vapor products. The steam and reaction products are discharged from the reactor vapor line and enter the main fractionator where further processing ensure the separation of the stream into valuable products. 

For low-temperature operation, liquid gas refrigerants contained in Dewars surrounding the reactor effectively maintain the sample temperature, but it is critical that the level be maintained constant for precise adsorption studies. Temperatures intermediate between the boiling or critical temperatures of nitrogen can be maintained by controlled pumping of the volume over the refrigerant gas, either as such, or... 

If the reaction is exothermic, there is a possibility that the reaction may run away, creating excessive pressures in the reactor. Because the reaction rate varies exponentially with temperature, the effect can be very rapid, and a safety valve prevents an excessive pressure increase. As soon as the pressure in the reactor... 

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