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Kinetic Studies Of Dry Sorbents For Medium Temperature Application Final Report September 1 1993 August 31 1994
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Book Synopsis Kinetic Studies of Dry Sorbents for Medium Temperature Application. Final Report, September 1, 1993--August 31, 1994 by :
Download or read book Kinetic Studies of Dry Sorbents for Medium Temperature Application. Final Report, September 1, 1993--August 31, 1994 written by and published by . This book was released on 1995 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project is to study the fundamental nature of the sorbent reactivity and reaction kinetics in the medium temperature range from 600°F to 1200°F available in the convective pass of a boiler upstream of the economizer, where dry sorbents are injected to remove SO2 from the flue gas. Research focus is on the fundamental mechanisms of sorbent-flue gas interaction under economizer and hot baghouse conditions utilizing the experimental setup and the results of the first three years of research. During the fourth year, the interference of carbonation reaction to sulfation reaction was studied as well as the concentration dependency of the sulfation reaction. The data to date showed that the carbonation did not interfere the sulfation reaction rate for reactions taking place less than 1 second. However, there was significant decrease in carbonation conversion when the sulfation reaction took place simultaneously. The levels of SO2 concentration had negligible effects on reaction rates when the concentration was maintained above 3000 ppM. An n-th order deactivation kinetic model was also developed during the fourth year to model the kinetics of various reactions. This model is particularly useful for the dry sorbent reactions, since the apparent rate constants rapidly decrease during the first 1 second of exposure to various gaseous reactants.
Book Synopsis Legaré's First Poems and His Early Career by : James E. Kibler
Download or read book Legaré's First Poems and His Early Career written by James E. Kibler and published by . This book was released on 1973 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Kinetics and Structural Evolution of Sorbents at High Temperatures. Final Report, September 1, 1992--August 31, 1993 by :
Download or read book Kinetics and Structural Evolution of Sorbents at High Temperatures. Final Report, September 1, 1992--August 31, 1993 written by and published by . This book was released on 1993 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this project is on furnace sorbent injection technology using dry, calcium-based sorbents for flue gas desulfurization. The goal is to provide fundamental research kinetics and the effects of sorbent properties, aimed at improving SO2 removal and increasing sorbent utilization in a cost-effective fashion. The main focus of the third year work has been to obtain fundamental kinetic data for calcination, sintering and sulfation of calcium hydroxide sorbent. The results, their interpretation, and discussions are the primary focus of this report. Other major portions of this year's work covered in the report include the additions and modifications made to the experimental system, and preliminary results of the studies with modified Ca(OH)2. Most of the reactor system and the analytical and measurement techniques were developed in the second year and formed the necessary framework for realizing the project goal. A few design and experimental constraints necessitated modifications and additions which were made in the beginning of this year. A continuous micro-feeder was built in order to feed very small quantities of sorbent, which is essential to maintain differential conditions with respect to SO2 during sulfation experiments. The particle collection probe was modified with an insulating ceramic cover and cap, in order to reduce its cooling effect and achieve better isothermality within the reactor. A cascade cyclone sampler was added to replace the impactor because the particle loading capacity of the impactor was not sufficient to hold enough powder required for post-reaction analyses.
Download or read book Acid Precipitation written by and published by . This book was released on 1994 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Kinetic Studies of Dry Sorent for Medium Temperature Applications. Final Report by :
Download or read book Kinetic Studies of Dry Sorent for Medium Temperature Applications. Final Report written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project is to investigate the fundamental nature of sorbent reactivity and reaction kinetics in the medium temperature range from 600[degrees]F (316[degrees]C) to 1200[degrees]F (649[degrees]C) available in the convective pass of a boiler upstream of the economizer, where dry sorbents are injected to remove SO[sub 2] from the flue gas. Research focuses on the mechanisms of sorbent- flue gas interaction under economizer and hot baghouse conditions utilizing the experimental setup and the results of the first four years of research.
Book Synopsis Kinetics and Structural Evolution of Sorbents at High Temperatures. Final Report, September 1, 1994--February 29, 1996 by :
Download or read book Kinetics and Structural Evolution of Sorbents at High Temperatures. Final Report, September 1, 1994--February 29, 1996 written by and published by . This book was released on 1996 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this project is on furnace sorbent injection technology using dry calcium-based sorbents for the flue gas desulfurization. The goal is to provide fundamental research kinetics and effects of sorbent properties, aimed at improving SO2 removal and increasing sorbent utilization in a cost-effective manner. The fifth year project work has been carried out in two phases: (1) modified sorbent studies to understand the influence of sorbent modifications (both physical and chemical) on reaction mechanisms, and (2) development of a comprehensive sulfation model to interpret and predict short-time simultaneous calcination, sulfation and sintering processes. This report discusses these two phases of research.
Book Synopsis Aile şirketlerini büyüten yeni nesiller by : Sadi Özdemir
Download or read book Aile şirketlerini büyüten yeni nesiller written by Sadi Özdemir and published by . This book was released on 2010 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adsorption and Desorption of Sulfur Dioxide on Novel Adsorbents for Flue Gas Desulfurization. Final Report, September 1, 1993--August 31, 1994 by :
Download or read book Adsorption and Desorption of Sulfur Dioxide on Novel Adsorbents for Flue Gas Desulfurization. Final Report, September 1, 1993--August 31, 1994 written by and published by . This book was released on 1995 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dry regenerative sorption processes have recently attracted increasing attention in flue gas desulfurization (FGD) because of their several advantages over the conventional wet-scrubbing processes. Dry sorbents are usually made by coating a transition or alkaline earth metal precursor on the surface of a porous support. Major disadvantages of these sorbents prepared by the conventional methods include relatively poor attrition resistance and low SO2 sorption capacity. The physical and especially chemical attrition (associated with the sulphation-oxidation-reduction cycles in the process) deteriorates the performance of the sorbents. The low SO2 sorption capacity is primarily due to the small surface area of the support. Materials with a high surface area are not used as the supports for FGD sorbents because these materials usually are not thermally stable at high temperatures. In the past year, the research supported by Ohio Coal Development Office was focused on synthesis and properties of sol-gel derived alumina and zeolite sorbents with improved properties for FGD. The sol-gel derived alumina has large surface area, mesopore size and excellent mechanical strength. Some alumina-free zeolites not only posses the basic properties required as a sorbent for FGD (hydrophobicity, thermal and chemical stability, mechanical strength) but also have extremely large surface area and selective surface chemistry. The major objectives of this research program were to synthesize the sol-gel derived sorbents and to explore the use of the zeolites either directly as adsorbents or as sorbent support for FGD. The research was aimed at developing novel FGD sorbents possessing better sorption equilibrium and kinetic properties and improved physical and chemical attrition resistance.
Book Synopsis Rosenkräntzlein, bestehend in 9 Vatter unser und 9 Ave Maria, 9 Täg, oder 9 Mittwochen nach einander zu Ehren des H. Cajetani Tienne andächtig zu sprechen by :
Download or read book Rosenkräntzlein, bestehend in 9 Vatter unser und 9 Ave Maria, 9 Täg, oder 9 Mittwochen nach einander zu Ehren des H. Cajetani Tienne andächtig zu sprechen written by and published by . This book was released on 1800 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase I written by Wayne T. Davis and published by . This book was released on 1980 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New High-capacity, Calcium-based Sorbents, Calcium Silicate Sorbents. Final Report, 1993--August 31, 1994 by :
Download or read book New High-capacity, Calcium-based Sorbents, Calcium Silicate Sorbents. Final Report, 1993--August 31, 1994 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search is being carried out for new calcium-based S0[sub 2] sorbents for induct injection. More specifically, a search is being carried out for induct injection calcium silicate sorbents that are highly cost effective. The objectives for the current year include the study of sorbents made from Ca(OH)[sub 2], from mixtures of Ca(OH)[sub 2] and SiO[sub 2], and from portland cement. They also include the study of sorbents made from model compounds. During this year, sorbents prepared from Ca(OH)[sub 2] and from mixtures of Ca(OH)[sub 2] and fumed SiO[sub 2] were investigated. The results show that very good SiO[sub 2]-modified Ca(OH)[sub 2] sorbents in which the Si-to-Ca reactant ratio is low can be prepared from Ca(OH)[sub 2] and fumed SiO[sub 2]. Sorbents prepared from Ca(OH)[sub 2] and natural SiO[sub 2] or natural SiO[sub 2] sources were also studied. The results obtained show that very good SiO[sub 2]-modified Ca(OH)[sub 2] sorbents and calcium silicate hydrate sorbents, C-S-H sorbents, can be prepared from Ca(OH)[sub 2] and diatomite, pumice or perlite, minerals that are readily available. In addition. sorbents prepared from Ca[sub 3]SiO[sub 5] and[beta]-Ca[sub 2]SiO[sub 4] and from mixtures of these compounds and SiO[sub 2] were studied. The results secured demonstrate that very good C-S-H rich sorbents can be prepared from these compounds and from mixtures of them with SiO[sub 2]. They also provide information useful for interpreting the cement sorbent results. Sorbents prepared from cement and from mixtures of cement and natural SiO[sub 2] or SiO[sub 2] sources were investigated as well. The results secured show that cement and mixtures of it with diatomite, pumice or perlite rapidly yield excellent sorbents with the proper reaction conditions.
Book Synopsis Development of Novel Copper-based Sorbents for Hot Gas Cleanup: Final Technical Report, September 1, 1992 Through August 31, 1993 by : Andy H. Hill
Download or read book Development of Novel Copper-based Sorbents for Hot Gas Cleanup: Final Technical Report, September 1, 1992 Through August 31, 1993 written by Andy H. Hill and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stabilization of Spent Sorbents from Coal Gasification. Final Technical Report, September 1, 1992--August 31, 1993 by :
Download or read book Stabilization of Spent Sorbents from Coal Gasification. Final Technical Report, September 1, 1992--August 31, 1993 written by and published by . This book was released on 1993 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this investigation was to determine the rates of reactions involving partially sulfided dolomite and oxygen, which is needed for the design of the reactor system for the stabilization of sulfide-containing solid wastes from gasification of high sulfur coals. To achieve this objective, samples of partially sulfided dolomite were reacted with oxygen at a variety of operating conditions in a fluidized-bed reactor. The effect of external diffusion was eliminated by using small quantities of the sorbent and maintaining a high flow rate of the reactant gas. The reacted sorbents were analyzed to determine the extent of conversion as a function of operating variables including sorbent particle size, reaction temperature and pressure, and oxygen concentration. The results of sulfation tests indicate that the rate of reaction increases with increasing temperature, increasing oxygen partial pressure, and decreasing sorbent particle size. The rate of the sulfation reaction can be described by a diffuse interface model where both chemical reaction and intraparticle diffusion control the reaction rate. The kinetic model of the sulfation reaction was used to determine the requirements for the reactor system, i.e., reactor size and operating conditions, for successful stabilization of sulfide-containing solid wastes from gasification of high sulfur coals (with in-bed desulfurization using calcium based sorbents). The results indicate that the rate of reaction is fast enough to allow essentially complete sulfation in reactors with acceptable dimensions. The optimum sulfation temperature appears to be around 800°C for high pressure as well as atmospheric stabilization of the spent sorbents.
Book Synopsis Basic Studies of Dry Sorbents for Medium Temperature Range Applications in Flue Gas Desulfurization by : Zhenwei Wang
Download or read book Basic Studies of Dry Sorbents for Medium Temperature Range Applications in Flue Gas Desulfurization written by Zhenwei Wang and published by . This book was released on 1996 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
