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Author: Sundareswaran Parameswaran Iyer
Publisher:
ISBN:
Category : Axial flow
Languages : en
Pages : 196
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"The effect of axial mixing in the liquid phase on the performance of a gas absorption column was studied using the experimental data of Michael Brittan for the carbon dioxide and water system. In this study, piston flow conditions were assumed for the gas phase. A one-parameter mathematical model, which characterized the flow regimes in both the gas and the liquid phases undergoing plug flow conditions, was first curve fitted for its unknown parameter (i.e. the Number of Transfer Units) by a non-linear regression analysis procedure. The "AAPD" (i.e. the Average Absolute Percentage Deviation between the predicted value of the gas phase concentration and the experimental data) was also computed for each set of data. An attempt was made to curve-fit a two-parameter mathematical model, which assumed plug flow in the gas phase but axial mixing in the water phase, by a similar non-linear regression analysis procedure. However, in the iterative technique used, the values of the unknown parameters (i.e., the water phase axial mixing parameter and the number of transfer units) failed to converge. As an alternate to this procedure a graphical method was used to study the effect of the axial mixing parameter on the value of the "AAPD". The results obtained from the analysis of the two mathematical models were examined. A comparison showed that the "AAPD" computed for both the models were very close; hence, it was concluded that the effect of axial mixing in the water phase, for the nitrogen carbon dioxide-water system based on the data obtained by Brittan and Woodburn(2) has little influence on the gas-absorption column--Abstract, leaves iv-v.
Author: Sundareswaran Parameswaran Iyer
Publisher:
ISBN:
Category : Axial flow
Languages : en
Pages : 196
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Book Description
"The effect of axial mixing in the liquid phase on the performance of a gas absorption column was studied using the experimental data of Michael Brittan for the carbon dioxide and water system. In this study, piston flow conditions were assumed for the gas phase. A one-parameter mathematical model, which characterized the flow regimes in both the gas and the liquid phases undergoing plug flow conditions, was first curve fitted for its unknown parameter (i.e. the Number of Transfer Units) by a non-linear regression analysis procedure. The "AAPD" (i.e. the Average Absolute Percentage Deviation between the predicted value of the gas phase concentration and the experimental data) was also computed for each set of data. An attempt was made to curve-fit a two-parameter mathematical model, which assumed plug flow in the gas phase but axial mixing in the water phase, by a similar non-linear regression analysis procedure. However, in the iterative technique used, the values of the unknown parameters (i.e., the water phase axial mixing parameter and the number of transfer units) failed to converge. As an alternate to this procedure a graphical method was used to study the effect of the axial mixing parameter on the value of the "AAPD". The results obtained from the analysis of the two mathematical models were examined. A comparison showed that the "AAPD" computed for both the models were very close; hence, it was concluded that the effect of axial mixing in the water phase, for the nitrogen carbon dioxide-water system based on the data obtained by Brittan and Woodburn(2) has little influence on the gas-absorption column--Abstract, leaves iv-v.
Author: Virendra Kumar Mathur
Publisher:
ISBN:
Category : Axial flow
Languages : en
Pages : 340
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"A steady state approach was followed in this investigation to determine the effects of liquid and gas flow rates, packing size and packing height on the interphase mass transfer coefficient and gas phase axial mixing Peclet numbers. Experiments were performed on the absorption of carbon dioxide from a mixture of carbon dioxide and nitrogen in a packed column. Absorption was performed using 1/4, 3/8 and l/2 inch Raschig rings, with a packing height of 3 feet and also using 3/8 inch Raschig rings with a packing height of 5 feet. The liquid and gas flow ranges used were 2865 to 5680 lb./hr.sq.ft. and 5.0 to 7.4 lb./hr.sq.ft., respectively. Three mathematical models, viz. (i) plug flow in both the gas and liquid phases, (ii) axial mixing in gas phase and plug flow in liquid phase, and (iii) axial mixing in both gas and liquid phases, were used. It is found that axial mixing in the gas phase increases with increases in liquid flow rate, packing size and packing height. The behavior of apparent and true mass transfer coefficients indicates a decrease in axial mixing with increases in gas flow rates. However, axial mixing is found to be small under the experimental conditions used in this investigation. The gas phase Peclet numbers obtained in this investigation are about fifty times greater than reported by workers using a transient technique under the same conditions. Correlations for the apparent and true over-all liquid phase mass transfer coefficients are also presented"--Abstract, leaf ii.
Author: Edward Thomas Woodburn
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Betty Ann Cooper
Publisher:
ISBN:
Category :
Languages : en
Pages : 284
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Author: William E. Dunn
Publisher:
ISBN:
Category : Dispersion
Languages : en
Pages : 78
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Author: D. J. Conklin
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
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Author:
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Category : Aeronautics
Languages : en
Pages : 274
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Author: Hugo de Lasa
Publisher: Springer Science & Business Media
ISBN: 9400944004
Category : Science
Languages : en
Pages : 839
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Book Description
Today's frustrations and anxieties resulting from two energy crises in only one decade, show us the problems and fragility of a world built on high energy consumption, accustomed to the use of cheap non-renewable energy and to the acceptance of eXisting imbalances between the resources and demands of countries. Despite all these stressing factors, our world is still hesitatins about the urgency of undertaking new and decisive research that could stabilize our future, Could this trend change in the near future? In our view, two different scenarios are possible. A renewed energy tension could take place with an unpredictable timing mostly related to political and economic factors, This could bring again scientists and technologists to a new state of shock and awaken our talents, A second interesting and beneficial scenario could result from the positive influence of a new generation of researchers that with or without immediate crisis, acting both in industry and academia, will face the challenge of developing technologies and processes to pave the way to a less vulnerable society, Because Chemical Reactor Design and Technology activities are at the heart of these required new technologies the timeliness of the NATO-Advanced Study Institute at the University of Western Ontario, London, was very appropriate.
Author: Don W. Green
Publisher: McGraw Hill Professional
ISBN: 0071542213
Category : Technology & Engineering
Languages : en
Pages : 133
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Get Cutting-Edge Coverage of All Chemical Engineering Topics— from Fundamentals to the Latest Computer Applications First published in 1934, Perry's Chemical Engineers' Handbook has equipped generations of engineers and chemists with an expert source of chemical engineering information and data. Now updated to reflect the latest technology and processes of the new millennium, the Eighth Edition of this classic guide provides unsurpassed coverage of every aspect of chemical engineering-from fundamental principles to chemical processes and equipment to new computer applications. Filled with over 700 detailed illustrations, the Eighth Edition of Perry's Chemcial Engineering Handbook features: Comprehensive tables and charts for unit conversion A greatly expanded section on physical and chemical data New to this edition: the latest advances in distillation, liquid-liquid extraction, reactor modeling, biological processes, biochemical and membrane separation processes, and chemical plant safety practices with accident case histories Inside This Updated Chemical Engineering Guide - Conversion Factors and Mathematical Symbols • Physical and Chemical Data • Mathematics • Thermodynamics • Heat and Mass Transfer • Fluid and Particle Dynamics Reaction Kinetics • Process Control • Process Economics • Transport and Storage of Fluids • Heat Transfer Equipment • Psychrometry, Evaporative Cooling, and Solids Drying • Distillation • Gas Absorption and Gas-Liquid System Design • Liquid-Liquid Extraction Operations and Equipment • Adsorption and Ion Exchange • Gas-Solid Operations and Equipment • Liquid-Solid Operations and Equipment • Solid-Solid Operations and Equipment • Size Reduction and Size Enlargement • Handling of Bulk Solids and Packaging of Solids and Liquids • Alternative Separation Processes • And Many Other Topics!
Author: Freeman H. Dyke
Publisher:
ISBN:
Category :
Languages : en
Pages : 98
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