Journal ArticleDOI
Continuous flow systems. Distribution of residence times
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TLDR
In this article, the authors proposed a method to predict the distribution of residence-times in large systems by using distribution-functions for residencetimes, which can be used to calculate the etficiencies of reactors and blenders.About:
This article is published in Chemical Engineering Science.The article was published on 1995-12-01. It has received 1416 citations till now. The article focuses on the topics: Residence time distribution & Perfect mixing.read more
Citations
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Stochastic Modeling of the Particle Residence Time Distribution in an Opposed Multi-Burner Gasifier
TL;DR: In this article, a stochastic mathematical model based on the Markov chains model is developed for the opposed multi-burner gasifier (OMBG), which closely describes the behavior of the flow pattern and particle RTD in the gasification system.
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Residence time distributions in non-uniform aquifer recharge and thickness conditions – An analytical approach based on the assumption of Dupuit-Forchheimer
TL;DR: In this paper, a semi-analytical approximation of the RTD for generic trapezoidal aquifers exposed to linearly variable recharges is derived for a homogeneous 2D cross-sectional aquifer in steady-state conditions following the Dupuit-Forchheimer assumption.
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Comparison of residence time models for pharmaceutical twin-screw-extrusion processes
TL;DR: In this paper, a new model explicitly for twin-screw-extrusion was developed, which respects two independent mixing processes and is superior to all the other tested models in terms of comprehensibility and insight in process condition changes.
Journal ArticleDOI
Modelling and simulation of a mixed-flow reactor for ammonia and methanol synthesis
Chue-San Yoo,Anthony G. Dixon +1 more
TL;DR: The use of mixed axial and radial flows in a fixed-bed adiabatic reactor can lead to regions of flow "back-up" in the bed as discussed by the authors.
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Predicting stagnant pore volume in porous media using temporal moments of tracer breakthrough curves
TL;DR: In this paper, the authors use the moments on the tracer breakthrough curve to solve the inverse problem of porous media characterization with stagnant volume fractions and derive mean, variance, skewness, and kurtosis of the analytical solution for the exit age density of the injected tracer in the porous medium.
References
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Mathematics of Adsorption in Beds. VI. The Effect of Longitudinal Diffusion in Ion Exchange and Chromatographic Columns
Leon Lapidus,Neal R. Amundson +1 more
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The Definition and Measurement of Some Characteristics of Mixtures
TL;DR: In this paper, it is shown that the important features of such mixtures can be expressed by two statistically defined quantities, the scale and the intensity of segregation, and methods of measuring these are suggested.