Fixed bed reactor design

Rase Fixed Bed Reactor Design and Diagnostics, Butter worihs, 1990) has a general computer program for reactor design and these case studies ... 

More up-to-date data of this process are employed in a study by Rase (Fixed Bed Reactor Design and Diagnostics, Butterworths, 1990, pp. 275-286). In order to keep the pressure drop low, radial flow reactors are used, two units in series with reheating between them. Simultaneous formation of benzene, toluene, and minor products is taken into account. An economic comparison is made of two different catalysts under a variety of operating conditions. Some of the computer printouts are shown there. 

Rase, H. F. (1990) Fixed-bed Reactor Design and Diagnostics (Butterworths). 

The tabulated data at two temperatures were obtained in a recycle reactor with powdered catalyst (Rase, Fixed Bed Reactor Design and Diagnostics, p 312, 1990). Verify that the equations are correct by checking the linearized forms, l/rx = a + b(l/pj Pf/r2 c + Pw... 

Further advancements in the theory of fixed bed reactor design have been made(56,57) but it is unusual for experimental data to be of sufficient precision and extent to justify the application of sophisticated methods of calculation. Uncertainties in the knowledge of effective thermal conductivities and heat transfer between gas and solid make the calculation of temperature distribution in the bed susceptible to inaccuracies, particularly in view of the pronounced effect of temperature on the reaction rate. 

Numerical simulation techniques were used to investigate the performance characteristics of alternative fixed-bed reactor designs. The complexity of a model used for simulation depends... 

Simple, low cost fixed-bed reactor design drop in replacement for other catalysts... 

A prominent trade-off in fixed-bed reactor design concerns the catalyst particle size. What is the basis for the choice of a certain particle size When the catalyst performance is to be optimized, the application of the Thiele model helps to provide an answer (Figure 7). The Thiele modulus accounts for the competition between the chemical reaction and the limitation of transport of reactants by diffusion in a porous catalyst particle. It is defined as the square root of the ratio of the characteristic diffusion time fo = L /D and the characteristic reaction time (r. For a... 

The selection of an appropriate fixed bed reactor design for a given process is performed assessing the main limitations of these reactors. The fixed packed bed reactors can be malfunctioning due to improper temperature control, pressure drop for processes with low tolerance, and deactivation of the catalyst. 

CESI is developing an improved water gas shift catalyst formulation that targets transportation applications with catalyst characteristics such as 1) no pre-conditioning requirement, 2) no air sensitivity, 3) preferably non-precious metal based, and 4) low sensitivity to condensed water. For the data analysis, the integral fixed bed reactor design equation was used with an empirical rate expression... 

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