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Author : John Francis D'Amico
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (31 download)
Download or read book The Removal of Hydrogen Sulfide from a Gas Mixture written by John Francis D'Amico and published by . This book was released on 1954 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sidney Katell
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.3/5 (91 download)
Download or read book Bibliography of Processes for Removing Hydrogen Sulfide from Industrial Gases written by Sidney Katell and published by . This book was released on 1959 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. W. Wainwright
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)
Download or read book Removal of Hydrogen Sulfide and Carbon Dioxide from Synthesis Gas, Using Di- and Tri-ethanolamine written by H. W. Wainwright and published by . This book was released on 1952 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William T. Abel
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.3/5 (91 download)
Download or read book Removal of Hydrogen Sulfide from Hot Producer Gas by Solid Absorbents written by William T. Abel and published by . This book was released on 1974 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. H. Field
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (91 download)
Download or read book Removing Hydrogen Sulfide by Hot Potassium Carbonate Absorption written by J. H. Field and published by . This book was released on 1960 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Method of Removing Hydrogen Sulfide from Gases Utilizing a Zinc Oxide Sorbent and Regenerating the Sorbent written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A spent solid sorbent resulting from the removal of hydrogen sulfide from a fuel gas flow is regenerated with a steam-air mixture. The mixture of steam and air may also include additional nitrogen or carbon dioxide. The gas mixture contacts the spent sorbent containing metal sulfide at a temperature above 500.degree. C. to regenerate the sulfide to metal oxide or carbonate. Various metal species including the period four transition metals and the lanthanides are suitable sorbents that may be regenerated by this method. In addition, the introduction of carbon dioxide gas permits carbonates such as those of strontium, barium and calcium to be regenerated. The steam permits regeneration of spent sorbent without formation of metal sulfate. Moreover, the regeneration will proceed with low oxygen concentrations and will occur without the increase in temperature to minimize the risk of sintering and densification of the sorbent.
Author : Glenn E. Johnson
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (91 download)
Download or read book Removing Hydrogen Sulfide from Synthesis Gas with Iron Oxide at Elevated Pressure written by Glenn E. Johnson and published by . This book was released on 1962 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Aldo Vieira da Rosa
Publisher : Academic Press
ISBN 13 : 0080878237
Total Pages : 865 pages
Book Rating : 4.0/5 (88 download)
Download or read book Fundamentals of Renewable Energy Processes written by Aldo Vieira da Rosa and published by Academic Press. This book was released on 2009-05-07 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are hearing a LOT about renewable energy these days! But unlike most available resources on alternative energy that focus on politics and economic impacts, da Rosa's practical guide, Fundamentals of Renewable Energy Processes, is dedicated to explaining the scientific and technological principles and processes that enable energy production from safe, renewable, clean sources. Advances in the renewable energy sphere are proceeding with an unprecedented speed, and in order for the world's alarming energy challenges to be solved, solid, up-to-date resources addressing the technical aspects of renewables are essential. This new, updated 2e of da Rosa's successful book continues to give readers all the background they need to gain a thorough understanding of the most popular types of renewable energy—hydrogen, solar power, biomass, wind power, and hydropower—from the ground up. The latest advances in all these technologies are given particular attention, and are carefully contextualized to help professionals and students grasp the "whys and hows" behind these breakthroughs. Discusses how and why the most popular renewable energy sources work, including wind, solar, bio and hydrogen Provides a thorough technical grounding for all professionals and students investigating renewable energy The new 2e of a highly regarded guide written by an internationally renowned pioneer
Author : Harold P. Rue
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Use of Lime in a Salt Solution for Removing Hydrogen Sulphide from Natural Gas written by Harold P. Rue and published by . This book was released on 1932 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrochemical Separation and Concentration of Hydrogen Sulfide from Gas Mixtures written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of removing sulfur oxides of H.sub. 2 S from high temperature gas mixtures (150.degree.-1000.degree. C.) is the subject of the present invention. An electrochemical cell is employed. The cell is provided with inert electrodes and an electrolyte which will provide anions compatible with the sulfur containing anions formed at the anode. The electrolyte is also selected to provide inert stable cations at the temperatures encountered. The gas mixture is passed by the cathode where the sulfur gases are converted to SO.sub. 4 -- or, in the case of H.sub. 2 S, to S--. The anions migrate to the anode where they are converted to a stable gaseous form at much greater concentration levels (>10X). Current flow may be effected by utilizing an external source of electrical energy or by passing a reducing gas such as hydrogen past the anode.
Author :
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)
Download or read book Sulfur Dioxide Emission Control by Hydrogen Sulfide Reaction in Aqueous Solution written by and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sreevani Kalapala
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (892 download)
Download or read book Removal of Hydrogen Sulfide from Landfill Gas Using a Solar Regenerable Adsorbent written by Sreevani Kalapala and published by . This book was released on 2014 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landfill gas is a complex mix of gases, containing methane, carbon dioxide, nitrogen and hydrogen sulfide, created by the action of microorganisms within the landfill. The gas can be collected and flared off or used to produce electricity. However, the hydrogen sulfide content, which may vary from 10's to 1000's of ppm, can cause irreversible damage to equipment, and when combusted creates sulfur dioxide, a precursor of acid rain. It is also a toxic eye and lung irritant, so that prolonged exposure must be kept below a few ppm. Therefore, hydrogen sulfide must be removed before landfill gas can be utilized. Our approach is to scrub hydrogen sulfide into aqueous media and then use an adsorbent to sequester it. The adsorbent is then regenerated in a photocatalytic reaction potentially using sunlight. The adsorbents are metal sulfides such as Copper sulfide, Molybdenum sulfide, tungsten sulfide, and silver sulfide. The expected reaction is the oxidation of sulfide in hydrogen sulfide to elemental sulfur, and the reduction of water to hydrogen gas. The volume of hydrogen obtained during photoreaction and the potentiometric shift of a sulfide ion-selective electrode were taken as measures of the extent of sulfide uptake and subsequent oxidation. Of the various sulfides examined, molybdenum sulfide with platinum co-catalyst displayed the optimum in terms of toxicity, stability and photocatalytic activity. Using a xenon arc lamp as illumination source and adding a surfactant or low surface energy material such as Teflon® to promote bubble formation, gas evolution rates on the order of 5 mL/g-hour were achieved.
Author : Bertram K. Shibler
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.3/5 (91 download)
Download or read book Processes for Recovering Sulfur from Secondary Source Materials written by Bertram K. Shibler and published by . This book was released on 1962 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conversion of Hydrogen Sulfide in Coal Gases to Liquid Elemental Sulfur with Monolithic Catalysts written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Removal of hydrogen sulfide (H2S) from coal gasifier gas and sulfur recovery are key steps in the development of Department of Energy's (DOE's) advanced power plants that produce electric power and clean transportation fuels with coal and natural gas. These plants will require highly clean coal gas with H2S below 1 ppmv and negligible amounts of trace contaminants such as hydrogen chloride, ammonia, alkali, heavy metals, and particulate. The conventional method of sulfur removal and recovery employing amine, Claus, and tail-gas treatment is very expensive. A second generation approach developed under DOE's sponsorship employs hot-gas desulfurization (HGD) using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process (DSRP). However, this process sequence does not remove trace contaminants and is targeted primarily towards the development of advanced integrated gasification combined cycle (IGCC) plants that produce electricity (not both electricity and transportation fuels). There is an immediate as well as long-term need for the development of cleanup processes that produce highly clean coal gas for next generation power plants. To this end, a novel process is now under development at several research organizations in which the H2S in coal gas is directly oxidized to elemental sulfur over a selective catalyst. Such a process is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H2S In the Single-Step Sulfur Recovery Process (SSRP), the direct oxidation of H2S to elemental sulfur in the presence of SO2 is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H2S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and HGD/DSRP. The H2 and CO components of syngas appear to behave as inert with respect to sulfur formed at the SSRP conditions. One problem in the SSRP process that needs to be eliminated or minimized is COS formation that may occur due to reaction of CO with sulfur formed from the Claus reaction. The objectives of this research are to formulate monolithic catalysts for removal of H2S from coal gases and minimum formation of COS with monolithic catalyst supports, [gamma]-alumina wash coat, and catalytic metals, to develop a regeneration method for a deactivated monolithic catalyst, to measure kinetics of both direct oxidation of H2S to elemental sulfur with SO2 as an oxidizer and formation of COS in the presence of a simulated coal gas mixture containing H2, CO, CO2, and moisture, using a monolithic catalyst reactor. The task of developing kinetic rate equations and modeling the direct oxidation process to assist in the design of large-scale plants will be abandoned since formulation of catalysts suitable for the removal of H2S and COS is being in progress. This heterogeneous catalytic reaction has gaseous reactants such as H2S and SO2. However, this heterogeneous catalytic reaction has heterogeneous products such as liquid elemental sulfur and steam. Experiments on conversion of hydrogen sulfide into elemental sulfur and formation of COS were carried out for the space time range of 46-570 seconds under reaction conditions to formulate catalysts suitable for the removal of H2S and COS from coal gases and evaluate their capabilities in reducing hydrogen sulfide and COS in coal gases. Simulated coal gas mixtures consist of 3,200-4,000-ppmv hydrogen sulfide, 1,600-20,000-ppmv sulfur dioxide, 18-27 v% hydrogen, 29-41 v% CO, 8-12 v% CO2, 0-10 vol % moisture, and nitrogen as remainder. Volumetric feed rates of simulated coal gas mixtures to the reactor are 30 - 180 cm3/min at 1 atm and 25 C (SCCM). The temperature of the reactor is controlled in an oven at 120-155 C. The pressure of the reactor is maintained at 40-210 psia. The molar ratio of H2S to SO2 in the monolithic catalyst reactor is maintained approximately at 2 for all the reaction experiment runs.
Author : Wenying Quan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (12 download)
Download or read book Selective Hydrogen Sulfide Removal from Biogas on Nitrogen-Modified Adsorbents written by Wenying Quan and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Biogas is a renewable energy source derived from the fermentation of organic materials which contains high concentrations of methane (CH4, 40-60 vol%) and carbon dioxide (CO2, 10-40 vol%). However, the presence of hydrogen sulfide (H2S) in biogas limits its environmentally-friendly applications, thereby making the H2S removal a priority task for enhancing biogas utilization. The existence of a large amount of CO2 in biogas can strongly impede the H2S removal using conventional methods. The selective H2S removal in the presence CO2 is still challenging in the field of biogas processing. Therefore, the objective of the present work is to achieve selective H2S removal from biogas on nitrogen-modified adsorbents, by specifically (i) studying the effect of surface modifications with different N-containing groups on H2S removal from CO2-containing gas mixtures, and (ii) clarifying the effect of key factors that affect the sorption performance, including CO2 concentrations, type of amine groups, pore structure, and surface functional groups.First, by loading tertiary amines on SBA-15, tetramethyl hexanediamine (TMHDA), the sorption selectivity of H2S was enhanced dramatically in the presence of CO2. On carbon-based solid sorbents including TMHDA-loaded activated carbons (TMHDA/ACs) and nitrogen-doped carbons (NCs), it is interesting that the H2S sorption performance was significantly enhanced in the presence of CO2. Characterization was conducted to shed light on the surface chemical properties-textural property-sorption performance relationship. On the silica-based sorbents, the H2S sorption capacity was closely related to the silanol groups on the surface of SBA-15, where the silanol groups were responsible for anchoring the TMHDA molecules which determined the number of active sites for H2S sorption. On the carbon-based sorbents, not only the surface chemistry but also the textural properties affect the H2S sorption performance. The surface pH value, double-bonded oxygen functional groups, and surface density of nitrogen all contributed to the observed enhancement of sorption capacity, likely through acid-basic interaction, while micropores in carbon materials offered higher adsorption potential towards H2S. It is noteworthy that this work, to our best knowledge, first discovered that the presence of CO2 can dramatically promote the H2S sorption on certain carbon-based sorbents, which is accompanied by the formation of solid sulfur deposit along with the release of CH4, both of which are valuable chemical products. The CO2-promoting effect likely originated from its interaction with H2S on the sorption sites on the carbon surface and the delocalized electrons on the carbon planes. Additionally, other factors, such as inlet CO2/H2S concentrations and sorption temperatures, were also investigated. The H2S sorption capacity remained stable on TMHDA-loaded SBA-15 and NC_800 with increasing the inlet CO2 concentration up to 40 vol%, however, the sorption capacity exhibited a volcano-shape trend within the same range of CO2 concentrations on AC-based adsorbents. The sorption capacity decreased monotonically with the increasing temperature from 25 to 75 on TMHDA-loaded adsorbents. The estimated H2S sorption heat on TMHDA/SBA-15 was 15.4 kJ/mol by fitting with Langmuir isotherm, while the heat on NC_800 was less than 20 kJ/mol by fitting with both Langmuir and Dubinin-Radushkevich (DR) isotherms. Such relatively low sorption heat indicates that the H2S interaction with surface sites is relatively weak and thus higher density of adsorption sites would be desirable.
Download or read book REMOVAL OF HYDROGEN SULFIDE BY REGENERABLE METAL OXIDE SORBENTS. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT REMOVAL OF HYDROGEN SULFIDE BY REGENERABLE METAL OXIDE SORBENTS Karayýlan, Dilek M.S., Department of Chemical Engineering Supervisor : Prof. Dr. Timur Doðu Co-Supervisor: Prof. Dr. Gülþen Doðu June 2004, 166 pages High-temperature desulfurization of coal-derived fuel gases is an essential process in advanced power generation technologies. It may be accomplished by using metal oxide sorbents. Among the sorbents investigated CuO sorbent has received considerable attention. However, CuO in uncombined form is readily reduced to copper by the H2 and CO contained in fuel gases which lowers the desulfurization efficiency. To improve the performance of CuO-based sorbents, they have been combined with other metal oxides, forming metal oxide sorbents. Sulfidation experiments were carried out at 627 oC using a gas mixture composed of 1 % H2S and 10 % H2 in helium. Sorbent regeneration was carried out in the same reactor on sulfided samples at 700 oC using 6 % O2 in N2. Total flow rate of gas mixture was kept at 100 ml/min in most of the experiments. In this study, Cu-Mn-O, Cu-Mn-V-O and Cu-V-O sorbents were developed by using complexation method. Performance of prepared sorbents were investigated in a fixed-bed quartz microreactor over six sulfidation/regeneration cycles. During six cycles, sulfur retention capacity of Cu-Mn-O decreased slightly from 0.152 to 0.128 (g S)/(g of Sorbent) while some decrease from 0.110 to 0.054 (g S)/(g of Sorbent) was observed with Cu-Mn-V-O. Cu-V-O showed a very good performance in the first sulfidation and excessive thermal sintering in the first regeneration prevented further testing. Sulfur retention capacity of Cu-V-O was calculated as 0.123 (g S)/(g of Sorbent) at the end of the first sulfidation. In addition, SO2 formation in sulfidation experiments was observed only with Cu-V-O sorbent.
Author : David John Koch
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (33 download)
Download or read book Absorption of Hydrogen Sulfide Using Metal Sulfate Solutions written by David John Koch and published by . This book was released on 1992 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
