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Novel Nano Structured Sorbents For Elemental And Oxidized Mercury Removal From Flue Gas
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Book Synopsis Novel Nano-structured Sorbents for Elemental and Oxidized Mercury Removal from Flue Gas by : Lei Ji
Download or read book Novel Nano-structured Sorbents for Elemental and Oxidized Mercury Removal from Flue Gas written by Lei Ji and published by . This book was released on 2008 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermally robust chelating adsorbents, 3-mercaptopropyltrimethoxysilane silica (MPTS-silica) and 3-aminopropyltiethoxysilane 2-mercaptobenzothialzole silica (APTS-MBT-silica), were proven to be very effective in capture HgCl2 from simulated flue gas at elevated temperatures in a fixed-bed mode. For MPTS-silica, a minimum of 58 mg/g HgCl2 capacity was observed. Pore size of the silica substrate does not have significant effect while particle size was found to have a significant effect on mercury capture; this effect was believed to be due to an enhanced channeling effect for the larger particle size adsorbent. A new approach for simultaneous removal of elemental and oxidized mercury from flue gas was successfully developed by using a room temperature ionic liquid (RTIL) coating layer. Six RTILs were synthesized and tested for their potential of elemental and oxidized mercury capture. These RTIL coating layers are all thermally stable above 160°C and the coating of these RTIL does not have any negative effect on the thermal stability of the chelating ligands. 1-butyl-3-methyl-imidazolium chloride ([bmim]Cl) was identified to be the most promising RTIL for simultaneous elemental and oxidized mercury removal from flue gas. 25 wt% [bmim]Cl coated MPTS-silica showed a 10 mg/g saturated elemental mercury capacity and a minimum of 38 mg/g oxidized mercury capacity in a fixed-bed mode. A low temperature selective catalytic reduction (SCR) catalyst, manganese oxide supported on titania, was tested as a sorbent for elemental mercury capture from flue gas at high temperatures. It was shown that this material showed high mercury capacity and remained active for mercury capture even after use for NOx reduction. Water vapor and manganese loading do not have a significant effect on mercury capture. However, SO2 has a strong negative effect on mercury removal process. Bed temperature was found to have a significant effect on mercury capture process. HgO formed during the mercury adsorption process by this material and it was believed that the mercury adsorption follows Mars-Maessen mechanism.
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 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 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 Developments of Sorbents for Mercury Removal From Flue Gas by : Evan J. Granite
Download or read book Developments of Sorbents for Mercury Removal From Flue Gas written by Evan J. Granite and published by . This book was released on 2000 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Sorbents for Mercury Removal From Flue Gas by : Evan J. Granite
Download or read book Comparison of Sorbents for Mercury Removal From Flue Gas written by Evan J. Granite and published by . This book was released on 2001 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Oxy-fuel Combustion by : Chuguang Zheng
Download or read book Oxy-fuel Combustion written by Chuguang Zheng and published by Academic Press. This book was released on 2017-09-14 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxy-fuel Combustion: Fundamentals, Theory and Practice provides a comprehensive review of various aspects of oxy-fuel combustion technology, including its concept, fundamental theory, pilot practice, large-scale feasibility studies and related practical issues, such as the commissioning and operation of an oxy-fuel combustion plant. Oxy-fuel combustion, as the most practical large-scale carbon capture power generation technology, has attracted significant attention in the past two decades. As significant progress has been achieved in worldwide demonstration and the oxy-combustion concept confirmed by Schwartze Pump, CUIDEN, Callide, Ponferrada and Yingcheng projects in the past five years, this book provides a timely addition for discussion and study. Covers oxy-fuel combustion technology Includes concepts, fundamentals, pilots and large-scale feasibility studies Considers related practical issues, such as the commissioning and operation of an oxy-fuel combustion plant Focuses on theories and methods closely related to engineering practice
Book Synopsis Evaluation of Nanostructured Silica-titania Composites in an Adsorption/photocatalytic Oxidation System for Elemental Mercury Vapor Control by : Erik Richard Pitoniak
Download or read book Evaluation of Nanostructured Silica-titania Composites in an Adsorption/photocatalytic Oxidation System for Elemental Mercury Vapor Control written by Erik Richard Pitoniak and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: NO and NO2 together significantly decreased mercury removal efficiency, while the combination of all minor gases decreased removal at 120 °C under dry conditions and slightly increased removal with more moisture.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2009 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nanomaterials and Nanocomposites, Nanostructure Surfaces, and Their Applications by : Olena Fesenko
Download or read book Nanomaterials and Nanocomposites, Nanostructure Surfaces, and Their Applications written by Olena Fesenko and published by Springer Nature. This book was released on 2023-03-27 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights some of the latest advances in nanotechnology and nanomaterials from leading researchers in Ukraine, Europe and beyond. It features contributions presented at the 8th International Science and Practice Conference Nanotechnology and Nanomaterials (NANO2020), which was held on August 25–28, 2021 at Lviv Polytechnic National University, and was jointly organized by the Institute of Physics, the National Academy of Sciences of Ukraine, Lviv Polytechnic National University, University of Tartu (Estonia), University of Turin (Italy), Pierre and Marie Curie University (France), European Profiles S.A. (Greece), Representation of the Polish Academy of Sciences in Kyiv, University of Angers (France), Ruprecht Karl University of Heidelberg (Germany). Internationally recognized experts from a wide range of universities and research institutions share their knowledge and key findings on material properties, behavior, and synthesis. This book’s companion volume also addresses topics such as nano-optics, energy storage, and biomedical applications.
Book Synopsis ASSESSMENT OF LOW COST NOVEL SORBENTS FOR COAL-FIRED POWER PLANT MERCURY CONTROL. by :
Download or read book ASSESSMENT OF LOW COST NOVEL SORBENTS FOR COAL-FIRED POWER PLANT MERCURY CONTROL. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a Technical Report under a program funded by the Department of Energy's National Energy Technology Laboratory (NETL) to obtain the necessary information to assess the viability of lower cost alternatives to commercially available activated carbon for mercury control in coal-fired utilities. During this reporting period, several sorbent samples have been tested by URS in their laboratory fixed-bed system. The sorbents were evaluated under conditions simulating flue gas from power plants burning Powder River Basin (PRB) and low sulfur eastern bituminous coals. The equilibrium adsorption capacities of the sorbents for both elemental and oxidized mercury are presented. A team meeting discussing the overall program and meetings with Midwest Generation and Wisconsin Electric Power Company (WEPCO) concerning field testing occurred during this reporting period.
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 Mercury Sorbent Delivery System for Flue Gas by :
Download or read book Mercury Sorbent Delivery System for Flue Gas written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The invention presents a device for the removal of elemental mercury from flue gas streams utilizing a layer of activated carbon particles contained within the filter fabric of a filter bag for use in a flue gas scrubbing system.
Book Synopsis Gas Phase Chelating Sorbents for Removal of Mercury from Flue Gases by : Malyuba A. Abu-Daabes
Download or read book Gas Phase Chelating Sorbents for Removal of Mercury from Flue Gases written by Malyuba A. Abu-Daabes and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Charecterization of Novel Sorbent for Vapor Phase Mercury Removal by : Arikrishnan Chandrasekaran
Download or read book Synthesis and Charecterization of Novel Sorbent for Vapor Phase Mercury Removal written by Arikrishnan Chandrasekaran and published by . This book was released on 2004 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Bamboo Derived Sorbents for Gas Phase Adsorption of Elemental Mercury by : Naved Ahmed Siddiqui
Download or read book Development of Bamboo Derived Sorbents for Gas Phase Adsorption of Elemental Mercury written by Naved Ahmed Siddiqui and published by . This book was released on 2009 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury is a serious hazard which, when emitted into the atmosphere, reaches back to the earth. Coal-fired plants in the U.S. emit mercury upon the burning of coal in the particulate, oxidized and elemental state. Of these, elemental mercury is the most difficult to capture. U.S. coal-fired plants emit approximately 48 tons of mercury per year. Based on the U.S. EPA Clean Air Mercury Rule, these emissions need to be capped by 90%. This project deals with the Development of Bamboo Derived Sorbents for the capture of elemental mercury in gas phase. Results and analyses of these sorbents depict successful capture of mercury in nitrogen atmosphere. Treatments such as carbon dioxide activation and hydrochloric acid functionalization are very effective in enhancing mercury adsorption. This project acts as a stepping stone for the development of bamboo derived material.
Book Synopsis Sorption of Arsenic, Mercury, Selenium Onto Nanostructured Adsorbent Media and Stabilization Via Surface Reactions by : Dong Suk Han
Download or read book Sorption of Arsenic, Mercury, Selenium Onto Nanostructured Adsorbent Media and Stabilization Via Surface Reactions written by Dong Suk Han and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall goal of this study is to evaluate the ability of novel nanostructured adsorbent media (NTAs, iron sulfides (FeS2 and FeS)) to remove arsenic, selenium and mercury from ash and scrubber pond effluents. The NTAs aim to enhance arsenic removal from solution compared to conventional adsorbents. The iron sulfides are expected to produce stable residuals for ultimate disposal after removing As, Se and Hg from solution, so that removal of these compounds from wastewaters will not result in contamination of soils and groundwaters. Methods for reliably and economically producing these materials were developed. The synthesized NTAs and iron sulfides were characterized by surface analysis techniques such as XRD, FT-IR, SEM-EDS, TEM, XPS, AFM and N2-adsorption. These analyses indicated that Ti(25)-SBA-15 has highly ordered hexagonal mesopores, MT has interparticle mesopores, pyrite (FeS2) forms crystalline, nonporous rectangular nanoparticles (
