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Author : Michael Jeffrey Hegarty Snow
Publisher :
ISBN 13 :
Total Pages : 626 pages
Book Rating : 4.:/5 (149 download)
Download or read book The Sulfation of Limestone and Calcium Oxide written by Michael Jeffrey Hegarty Snow and published by . This book was released on 1985 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. D. Hatfield
Publisher :
ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.3/5 (121 download)
Download or read book Investigation of the Reactivities of Limestone to Remove Sulfur Dioxide from Flue Gas written by J. D. Hatfield and published by . This book was released on 1971 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (31 download)
Download or read book Regeneration of Sulfated Limestone from FBCs written by and published by . This book was released on 1979 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adel F. Sarofim
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (84 download)
Download or read book The Kinetics of Sulfation of Calcium Oxide written by Adel F. Sarofim and published by . This book was released on 1990 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (727 download)
Download or read book The Kinetics of Sulfation of Calcium Oxide written by and published by . This book was released on 1989 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of the sulfation rate behavior show an initial fast rate followed by a rate decrease. This behavior has generally been interpreted as product layer diffusion limitations taking over after an initial kinetic rate regime. Many investigators tried to model this observed rate change. As pore diffusion was a limiting phenomenon in most of the experiments, authors have used several pore models to described this complication, more or less successfully. Product layer diffusivity has been assumed to be constant as conversion increased; however, there is no general agreement as to its value. In this work we are investigating the mechanism of this process with emphasis on measurement of product layer diffusivity and the surface reaction rate. Some additional experimental work was done to investigate the order and activation energy of the sulfation under different conditions. The effect of additives was studied again, by sprinkling some KCl or NaCl salt on top of partially reacted synthetic lime, in an effort to change the surface reaction rate rather than the diffusion rate.
Author : Jean Baptiste Charles de Hemptinne
Publisher :
ISBN 13 :
Total Pages : 472 pages
Book Rating : 4.:/5 (244 download)
Download or read book Sulfation of Nonporous Calcium Oxide written by Jean Baptiste Charles de Hemptinne and published by . This book was released on 1990 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Report No. 3, September 1, 1989--November 30, 1989 PDF Online Free](https://books.google.com/books/content/images/frontcover/FVEZnQAACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (727 download)
Download or read book The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Report No. 3, September 1, 1989--November 30, 1989 written by and published by . This book was released on 1989 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of the sulfation rate behavior show an initial fast rate followed by a rate decrease. This behavior has generally been interpreted as product layer diffusion limitations taking over after an initial kinetic rate regime. Many investigators tried to model this observed rate change. As pore diffusion was a limiting phenomenon in most of the experiments, authors have used several pore models to described this complication, more or less successfully. Product layer diffusivity has been assumed to be constant as conversion increased; however, there is no general agreement as to its value. In this work we are investigating the mechanism of this process with emphasis on measurement of product layer diffusivity and the surface reaction rate. Some additional experimental work was done to investigate the order and activation energy of the sulfation under different conditions. The effect of additives was studied again, by sprinkling some KCl or NaCl salt on top of partially reacted synthetic lime, in an effort to change the surface reaction rate rather than the diffusion rate.
![Download The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Project Status Report, February 27, 1989--May 31, 1989 PDF Online Free](https://books.google.com/books/content/images/frontcover/F-wQnQAACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (727 download)
Download or read book The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Project Status Report, February 27, 1989--May 31, 1989 written by and published by . This book was released on 1989 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of the sulfation rate behavior show an initial fast rate followed by a rate decrease. It is generally agreed that product layer diffusion limitations are the explanation for this behavior. Many investigators tried to model this observed rate change, more or less successfully. No agreement has been reached, however, as to the value of the produce layer diffusivity. Hence, in this work we want to investigate the mechanism of this process. In addition to understanding the initial kinetics, two questions will be focused on. First, we should understand what is diffusing. It appears that the driving force for this diffusion phenomenon is not first order with the SO2 concentration in the gas. This would indicate that some other, intermediary step is occurring. The second question concerns the composition of the product layer. Different conditions at the start of the reaction were observed to produce different diffusion rates at a later stage. The microscopic appearance of the product layer also appeared to be different.
![Download The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Project Status Report, June 1, 1989--August 31, 1989 PDF Online Free](https://books.google.com/books/content/images/frontcover/V5qAnQAACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (727 download)
Download or read book The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Project Status Report, June 1, 1989--August 31, 1989 written by and published by . This book was released on 1989 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of the sulfation rate behavior show an initial fast rate followed by a rate decrease. This behavior has generally been interpreted as product layer diffusion limitations taking over after an initial kinetic rate regime. Many investigators tried to model this observed rate change, more or less successfully. No agreement has been reached, however, as to the value of the product layer diffusivity. In this work we want to investigate the mechanism of this process. During the last quarter, most attention has been paid to analyzing the results obtained earlier. In the light of some unexpected results, we returned to the most fundamental question: what is the rate-limiting mechanism? It appeared that whatever the mechanism is, no rate ''constant'' could be used, since the rate is a function of the product layer composition, which changes during the reaction. When comparing the results obtained with different samples, however, it appeared that the best correlation was found if one assumes the limiting rate to occur at the CaSO4 interphase. This point of view has never been presented before and requires therefore a more attentive analysis.
![Download The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Project Status Report, March 1, 1990--May 31, 1990 PDF Online Free](https://books.google.com/books/content/images/frontcover/Sd6yAQAACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (727 download)
Download or read book The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Project Status Report, March 1, 1990--May 31, 1990 written by and published by . This book was released on 1990 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rate of sulfation of a CaO surface is rapid at first, limited by the intrinsic kinetics, but slows down with increasing conversion as a consequence of the increased resistance to diffusion through the product layer. The objectives of this study are to determine the intrinsic kinetics and the product layer diffusion pate by minimizing the resistances to gas-phase pore diffusion, and eliminating complications due to pore filling. This is achieved by the use of nonporous CaO. A wide range of particle sizes are used to change the relative importance of the regimes in which the intrinsic kinetics and product layer diffusion control. The assumption of constant product layer diffusivity can then be tested and the variables that determine this diffusivity independently studied. Information on product layer diffusion can also be obtained from studies of porous particles after the pore mouths are all plugged and a uniform surface coating is obtained. This information on diffusion rate and intrinsic reactivity can then be combined with a geometrical model to describe the rate of reaction over the entire range of conversions and is particularly useful in treating the effect of particle size on conversion history.
Download or read book Regeneration of Sulfated Metal Oxides and Carbonates written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alkali metal or alkaline earth metal carbonates such as calcium carbonate and magnesium carbonate found in dolomite or limestone are employed for removal of sulfur dioxide from combustion exhaust gases. The sulfated carbonates are regenerated to oxides through use of a solid-solid reaction, particularly calcium sulfide with calcium sulfate to form calcium oxide and sulfur dioxide gas. The regeneration is performed by contacting the sulfated material with a reductant gas such as hydrogen within an inert diluent to produce calcium sulfide in mixture with the sulfate under process conditions selected to permit the sulfide-sulfate, solid-state reaction to occur.
Author :
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (31 download)
Download or read book Regeneration of Sulfated Limestone from FBCs written by and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Argonne National Laboratory. Chemical Engineering Division
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (31 download)
Download or read book Investigation of Limestone Sulfation Enhancement Agents and Their Corrosive Rates in FBCs written by Argonne National Laboratory. Chemical Engineering Division and published by . This book was released on 1979 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Report No. 4, December 1, 1989--February 28, 1990 PDF Online Free](https://books.google.com/books/content/images/frontcover/AfdoAQAACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (727 download)
Download or read book The Kinetics of Sulfation of Calcium Oxide. [Quarterly] Report No. 4, December 1, 1989--February 28, 1990 written by and published by . This book was released on 1990 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study are to determine the intrinsic kinetics and the product layer diffusion rate by minimizing the resistances to gas-phase pore diffusion, and eliminating complications due to pore filling. In the report, a grain model was used to introduce the various potentially rate-limiting processes. It was compared with results obtained with a distributed pore model by Bhatia & Perlmutter (1981). Comparing the predicted behavior of the surface areas with conversion, it was even possible to compare experimental results with other models. The conclusion of this study was that, even thought the kinetic parameters obtained with different samples differed much more if product layer diffusion assumed rate-limiting rather than the surface reaction, the shape of the predicted curve approached the experimental findings so much better, that product layer diffusion is indeed most likely to be rate-limiting. (VC).
Author : J. A. Shearer
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (31 download)
Download or read book The Effects of Sodium Chloride on the Reaction of SO2/02 Mixtures with Limestones and Dolomites written by J. A. Shearer and published by . This book was released on 1978 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Virgil K. Viliamas
Publisher :
ISBN 13 :
Total Pages : 57 pages
Book Rating : 4.:/5 (113 download)
Download or read book The Effect of NACL on the Calcination and Sulfation of Calcium Carbonate and Greer Limestone written by Virgil K. Viliamas and published by . This book was released on 1977 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Tomita
Publisher : Elsevier
ISBN 13 : 9780080440897
Total Pages : 340 pages
Book Rating : 4.4/5 (48 download)
Download or read book Emissions Reduction written by A. Tomita and published by Elsevier. This book was released on 2001-12-18 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade the topic of emissions reduction and control has remained an important area of research due to the enforcement of various Government policies in an attempt to minimize the impact on the environment. One area in which a great deal of research has been conducted to address this policy is NOx/SOx suppression. However, despite the progress that has been made over this time period, further research into the most effective method of reducing NOx/SOx emissions is still urgently required. In developed countries, a more stringent requirement in the level of emissions (such as is NOx/SOx component of less than 10ppm) will be enforced in the near future. Developing countries will also need a new technology that is effective and that is suited to each countries needs. Additional research and development efforts are thus necessary to meet such requirements. This compendium contains a collection of key papers themed around NOx/SOx emissions from combustion of hydrocarbon resources and the attempts to secure an efficient and effective method for reducing these emissions. These key papers are taken from the journals Fuel, Fuel Processing Technology and Progress in Energy and Combustion Science.
