Adsorption Humidity Effects, Microparticle Rate Behavior, and Thermal Swing Adsorption

Application of adsorption processes for air purification requires an approach, which accounts for the presence of humidity. Four separate but related studies are conducted to examine the adsorption processes. A new pure component adsorption isotherm is developed to describe Type 5 adsorption. The results are used to correlate data of water on activated carbon. This model derives from the concept that capillary condensation accounts for Type 5 behavior and is strongly dependent on the pore size distribution. The new model has the advantage over all other prior models of being invertible in terms of loading and partial pressure. The Henry’s law limit and heat of adsorption effects are discussed. A study of coadsorption of water and immiscible organics is also presented. Data for the system chloroethane water on two activated carbons is measured. A new coadsorption model is developed to describe immiscible vapors and water. This model has the advantage of at most one adjustable paramet…

Contents

Chapter 1: Introduction
Chapter 2: An Adsorption Equilibrium Model for Type 5 Isotherms
2.1 Introduction
2.2 Model Development
2.3 Results
2.4 Conclusions
Chapter 3: Coadsorption Equilibria for Immiscible Vapors
3.1 Introduction
3.2 Water Coadsorption Literature Review
3.3 The Enthalpy Ratio Model for Coadsorbed Immiscible Mixtures
3.4 Water Organic Coadsorption Experiments
3.5 Results
3.6 Conclusions
Chapter 4: Studies of Temperature Swing Adsorption
4.1 Background
4.2 Fixed Bed Model
4.3 Laboratory-Scale Experimental TSA System
4.3.1 Description
4.3.2 Apparatus
4.3.3 Analytical
4.4 Results
4.4.1 Overview
4.5 Dry and Humid Runs Without Chemical Contaminant
4.5.1 Dry and Humid Runs With Chemical Contaminant
4.6 Cycle Concepts and Optimization
4.6.1 Approach
4.6.2 2-Bed Cycle Analysis
4.6.3 Simulation Optimized Cycle
4.7 Conclusions
Chapter 5: Particle Scale Transport
5.1 Introduction
5.2 Particle Scale Transport
5.3 Experimental Methods
5.4 Results
5.4.1 Uptake Behavior
5.5 Modeling of Results
5.6 Conclusions
Chapter 6: Recommendations and Conclusions
References

Author: mahle, john

Source: University of Maryland

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