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Preparation And Evaluation Of Sulfur Containing Adsorbents For Removal Of Mercury From Simulated Coal Combustion Of Flue Gases
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Book Synopsis Preparation and Evaluation of Sulfur Containing Adsorbents for Removal of Mercury from Simulated Coal Combustion of Flue Gases by : Hsing-Cheng Hsi
Download or read book Preparation and Evaluation of Sulfur Containing Adsorbents for Removal of Mercury from Simulated Coal Combustion of Flue Gases written by Hsing-Cheng Hsi and published by . This book was released on 2001 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluating sorbents produced from waste to remove mercury in simulated flue gases from coal combustion by : Hemantha Revata Seneviratne
Download or read book Evaluating sorbents produced from waste to remove mercury in simulated flue gases from coal combustion written by Hemantha Revata Seneviratne and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reviews of Environmental Contamination and Toxicology volume by : David M. Whitacre
Download or read book Reviews of Environmental Contamination and Toxicology volume written by David M. Whitacre and published by Springer. This book was released on 2014-07-08 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews of Environmental Contamination and Toxicology attempts to provide concise, critical reviews of timely advances, philosophy and significant areas of accomplished or needed endeavor in the total field of xenobiotics, in any segment of the environment, as well as toxicological implications.
Book Synopsis Synthesis and Characterization of Nano-structured Chelating Adsorbents for the Direct Removal of Mercury Vapor from Flue Gases by :
Download or read book Synthesis and Characterization of Nano-structured Chelating Adsorbents for the Direct Removal of Mercury Vapor from Flue Gases written by and published by . This book was released on 2004 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal-Fired utility boilers are currently the largest single-known source of anthropogenic mercury emissions in the United States. In this research, the potential of gas-phase chelating sorbents for the removal of mercury vapor from flue-gases emitted from coal-fired power plants has been investigated. Chelating adsorbents are currently limited to the removal of mercury from liquid phase. The novel gas-phase chelating adsorbents that have been developed in this research uniquely combine a chelating ligand with an ionizing surface nano-layer on a mesoporous substrate. This enables selective, multidentate adsorption of mercury directly from the gas phase. Different chelating ligands including cysteine, dithizone (CPTS-DZ), 3-mercaptopropyltrimethoxysilane (MPTS-Silica), and 2-mercaptobenzothiazole (APTS-MBT), were immobilized on silica substrates. The synthesis of the adsorbents is described, and detailed characterization data are reported. The theoretical (equilibrium) capacity for mercury removal using these adsorbents is in the range of 17-117 mg Hg/g. Evaluation of the thermal stability of the chelating adsorbents showed that cysteine activated adsorbent is stable at operating temperatures lower than 135°C. The adsorbents with higher operating temperature limits (CPTS-DZ, MPTS-Silica, and APTS-MBT) can operate up to 160°C. Coating of the silica substrate with different ratios of the room-temperature molten salt, methylpolyoxyethylene(15)octadecanammonium chloride (MEC), was performed and the optimum concentration was determined to be 20-30 wt%. The capability of the MEC ionic solvent to absorb mercury vapor and ionize it has also been studied. MEC solvent has high solubility for mercuric chloride (HgCl2), but limited solubility for elemental mercury (Hg0). The capture efficiency of the chelating adsorbents for HgCl2 under simulated flue-gas conditions has been investigated. No breakthrough of the pollutant was observed in extended experiments. Formation of chelate complex between the captured HgCl2 and the chelating ligands was confirmed with Far-FTIR. It is postulated that the Hg2+ capture mechanism is a combination of solubility in the surface coating and chelate formation. Homogeneous, as well as heterogeneous reduction mechanisms of HgCl2 have been investigated. Results showed that SO2 and H2O vapor are the main factors affecting Hg2+ reduction, and that the presence of HCl is critical for maintaining Hg2+ in its oxidized form.
Book Synopsis Coal Fired Flue Gas Mercury Emission Controls by : Jiang Wu
Download or read book Coal Fired Flue Gas Mercury Emission Controls written by Jiang Wu and published by Springer. This book was released on 2015-03-17 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury (Hg) is one of the most toxic heavy metals, harmful to both the environment and human health. Hg is released into the atmosphere from natural and anthropogenic sources and its emission control has caused much concern. This book introduces readers to Hg pollution from natural and anthropogenic sources and systematically describes coal-fired flue gas mercury emission control in industry, especially from coal-fired power stations. Mercury emission control theory and experimental research are demonstrated, including how elemental mercury is oxidized into oxidized mercury and the effect of flue gas contents on the mercury speciation transformation process. Mercury emission control methods, such as existing APCDs (air pollution control devices) at power stations, sorbent injection, additives in coal combustion and photo-catalytic methods are introduced in detail. Lab-scale, pilot-scale and full-scale experimental studies of sorbent injection conducted by the authors are presented systematically, helping researchers and engineers to understand how this approach reduces the mercury emissions in flue gas and to apply the methods in mercury emission control at coal-fired power stations. Readers will arrive at a comprehensive understanding of various mercury emission control methods that are suitable for industrial applications. The book is intended for scientists, researchers, engineers and graduate students in the fields of energy science and technology, environmental science and technology and chemical engineering.
Book Synopsis Development and Evaluation of Low-cost Sorbents for Removal of Mercury Emissions from Coal Combustion Flue Gas by :
Download or read book Development and Evaluation of Low-cost Sorbents for Removal of Mercury Emissions from Coal Combustion Flue Gas written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Determining how physical and chemical properties of sorbents affect vapor-phase mercury adsorption has led to potential approached for tailoring the properties of sorbents for more effective mercury removal. ... Objectives: to determine how physical and chemical properties of sorbents affect mercury adsoprtion; to develop more cost-effective sorbents"--P. v.
Book Synopsis Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). by : Daniel Bienstock
Download or read book Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). written by Daniel Bienstock and published by . This book was released on 1961 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Clean Coal Technologies by : Rajesh Kumar Jyothi
Download or read book Clean Coal Technologies written by Rajesh Kumar Jyothi and published by Springer Nature. This book was released on 2021-05-10 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of art of the several advanced approaches to beneficiation of coal. The influence of recent technology attains the advantages of processing coal, purification studies, rheological behavior, and the mineral beneficiation. The experts collected in this volume have contributed significantly to the enrichment in the in depth knowledge not only in context of working knowledge, but also future prospects of clean coal technology.
Book Synopsis Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). by : R. C. Kurtzrock
Download or read book Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). written by R. C. Kurtzrock and published by . This book was released on 1963 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flue Gas Desulfurization and Industrial Minerals by : M. Michael Miller
Download or read book Flue Gas Desulfurization and Industrial Minerals written by M. Michael Miller and published by . This book was released on 1993 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains 4,101 references on FGD [Flue Gas Desulfurization] ... primarily from 1982 through June 1993. Complements the "Flue Gas Desulfurization and Denitrification" bibliography published by the U.S. Dept. of Energy in Jan. 1985. References were located on the Energy, Science and Technology, Pollution Abstracts, and Environmental Bibliography databases. Primarily covers FGD and the use of industrial minerals in the desulfurization process or in by-product utilization and disposal. Emphasizes post-combustion removal of sulfur dioxide through processes such as in-duct injection and wet and dry scrubbing.
Book Synopsis Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). by : Andrew G. Sharkey
Download or read book Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). written by Andrew G. Sharkey and published by . This book was released on 1963 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Adsorbents for Capture of Vapor-phase Mercury and Other Toxic Components from Flue Gas by : Juan He
Download or read book Advanced Adsorbents for Capture of Vapor-phase Mercury and Other Toxic Components from Flue Gas written by Juan He and published by . This book was released on 2013 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: During coal combustion, mercury and arsenic are volatized and are present in multiple forms in the gas phase; similarly, the formation of nitrogen oxides in flue gas depends on nitrogen content of the coal and oxygen available to react with nitrogen. New approaches for cost-effective control of mercury and other pollutants are necessary. In this work, a group of room temperature ionic liquid coated nanostructured chelating adsorbents was developed and used for gas-phase mercury and arsenic adsorption; the simultaneous removal of mercury and nitrogen oxide using ceria-modified manganese oxide/titania materials was investigated. Three thermally robust adsorbents, 25 wt% [bmim]Cl coated-MPTS-Si, 25 wt% [bmim]Cl-MPTS-MCF and 25 wt% [bmim]Cl-Ambersep[superscript TM] GT74 were synthesized and demonstrated to be effective adsorbents for simultaneous capture of oxidized and elemental mercury at 160°C. Mercury from vapor phase dissolves in the [bmim]Cl ionic liquid layer;and subsequently bonds to the chelating ligands of MPTS or directly coordinates with the sulfur-containing groups from Ambersep[superscript TM]GT74 resin. In fixed-bed adsorption experiments, the 25 wt% [bmim]Cl-MPTS-Si exhibited the largest mercury (Hg2 and Hg0) capacity in an inert atmosphere. A mathematical model was developed to describe mercury removal based on the experimental data measured at laboratory-scale. To synthesize adsorbents for both mercury and arsenic capture, both [bmim]Cl and an amino acid-based RTIL, [TBP][Tau], were supported on a silica gel with high surface area and accessible mesopores. In both fixed-bed and batch adsorption modes, all of the RTIL-coated silica adsorbents can effectively remove Hg0 and As(III) simultaneously, and exhibited high As(III) capacities. Because of the high solubility of CO2 in the [TBP][Tau] RTIL, the presence of CO2 caused a negative effect on the Hg0 and As(III) adsorption performance of [TBP][Tau]-Si. High surface area ceria-titania materials are used as supports for manganese oxide for both warm-gas mercury capture and low temperature selective catalytic reduction. Remarkably, these materials exhibit high Hg0 adsorption capacities and excellent NO removal performance both in single-component tests and in combined NO and Hg0 removal experiments at 175°C. For the Hg0 adsorption, MnOx/CeO2-TiO2 adsorbents had large Hg0 capacities up to 37 mg g−1. SO2 inhibited Hg0 adsorption on the surface of MnOx, but the CeO2-TiO2 support retained most of its Hg0 capacity in the presence of 100 ppm SO2 The simultaneous capture of Hg0 and Hg2 at 175°C was observed using CeO2-TiO2 support. Both the NO adsorption and co-adsorption of NO + CO can be found over the surface of MnOx/CeO2-TiO2 materials. The results of XPS analysis suggest that the presence of lattice oxygen play important role on the mercury and NO adsorption, with great formation of HgO and nitrate species; in the presence of CO in the feed gas, mercury adsorption doesn't inhibit the SCR activity of NO. In summary, the nanostructured, RTILs coated chelating adsorbents and manganese supported on ceria-titania oxide materials were successfully developed and studied for removal of gas-phase mercury and other toxic components. The experimental results suggest these novel adsorbents could be technically feasible for multi-pollutants control in coal combustion.
Book Synopsis Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). by : Daniel Bienstock
Download or read book Process Development in Removing Sulfur Dioxide from Hot Flue Gases (in Four Parts). written by Daniel Bienstock and published by . This book was released on 1967 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Novel Activated Carbon-Based Adsorbents for Control of Mercury Emission From Coal-Fired Power Plants by :
Download or read book Development of Novel Activated Carbon-Based Adsorbents for Control of Mercury Emission From Coal-Fired Power Plants written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this study is to evaluate pertinent design and operational parameters that would enable successful application of activated carbon adsorption for the reduction of mercury emissions from coal-fired power plants. The study will evaluate the most suitable impregnate such as sulfur, chloride and other chelating agents for its ability to enhance the adsorptive capacity of activated carbon for mercury vapor under various process conditions. The main process variables to be evaluated include temperature, mercury concentration and speciation, relative humidity, oxygen content, and presence of SO2 and NOx in the flue gas. The optimal amount of impregnate for each of these carbons will be determined based on the exhibited performance. Another important parameter which governs the applicability of adsorption technology for the flue gas clean up is the rate at which vapor phase mercury is being removed from the flue gas by activated carbon. Therefore, the second part of this study will evaluate the adsorption kinetics using the impregnated activated carbons listed above. The rate of mercury uptake will also be evaluated under the process conditions that are representative of coal-fired power plants. Concerned with the ability of the adsorbed mercury to migrate back into the environment once saturated adsorbent is removed from the system, the study will also focus on the mercury desorption rate as a function of the type of impregnate, loading conditions, and the time of contact prior to disposal.
Book Synopsis Flue Gas Desulfurization and Sulfuric Acid Production Via Magnesia Scrubbing by :
Download or read book Flue Gas Desulfurization and Sulfuric Acid Production Via Magnesia Scrubbing written by and published by . This book was released on 1975 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1976 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
