acid gas Articles

  • Controlling acid gas mists

    Gas cleaning New and strict pollution regulations in metallurgical plants worldwide are restricting particulate and acid gas emissions to extremely low levels. Because of that, sulphuric acid plants are being installed to remove and utilise S02 in gases resulting from the roasting of sulphide ores, smelting of ores, and burning or regeneration of spent acid or acid sludge from ...


    By Beltran Technologies, Inc.

  • Repair, retrofit, and rebuild services for amine treating acid gas process - Case Study

    Catalytic Products International (CPI) was recently engaged by a Western Colorado Gas Processing Facility to review the existing amine treating acid gas process and the air pollution control equipment installed in an effort to help optimize the units and make improvements to the reliability of the entire system. Introduction: Identify root cause of numerous failures and create an ...

  • Environmental Effects of Acid Rain

    Air Pollution Creates Acid Rain Scientists have discovered that air pollution from the burning of fossil fuels is the major cause of acid rain. Acidic deposition, or acid rain as it is commonly known, occurs when emissions of sulfur dioxide (SO2) and oxides of nitrogen (NOx) react in the atmosphere with water, oxygen, and oxidants to form various acidic compounds. This mixture forms a mild ...

  • Acid mine drainage treatment

    Acid mine/rock drainage is a rampant problem in the world today. The above photo depicts acid drainage at an abandoned mine in the Yukon Territory of northwest Canada. This mine shares a similar history to thousands of other mines throughout the world. It was in operation for six short years in the 1950’s, producing gold ore. Its profitability eventually failed and it was abandoned. In the ...


    By WesTech Engineering, Inc.

  • Amerada Hess - acid flow back

    Client: Amerada Hess Triton - UK CETCO Oilfield Services successfully treated contaminated water returns on the Amerada Hess Triton FPSO. The fluids were treated during well clean-up operations and have reduced the potential for overboard oil discharges and production upsets at the offshore installation approximately 120 miles east of Aberdeen. Contaminated water returns are a common problem for ...


    By CETCO Energy Services

  • Understanding the atmospheric measurement and behavior of perfluorooctanoic acid

    The recently reported quantification of the atmospheric sampling artifact for perfluorooctanoic acid (PFOA) was applied to existing gas and particle concentration measurements. Specifically, gas phase concentrations were increased by a factor of 3.5 and particle‐bound concentrations by a factor of 0.1. The correlation constants in two particle–gas partition coefficient (KQA) estimation equations ...


    By John Wiley & Sons, Ltd.

  • Development of headspace–gas chromatography–flame ionization detection procedure to determine volatile fatty acids in zoo organic waste leachates

    In order to determine volatile fatty acids (short chain monocarboxylic acids with 2 to 6 carbon atoms in a molecule) in leachates formed in organic waste piles a procedure based on static headspace (HS) coupled with gas chromatography (GC) have been proposed and optimized. The conditions of HS extraction and sample introduction into a gas chromatograph as well as of chromatographic separation ...


    By IWA Publishing

  • Adsorptive removal of methylene blue by CuO-acid modified sepiolite as effective adsorbent and its regeneration with high-temperature gas stream

    In this study, the dynamic adsorption of methylene blue dye onto CuO-acid modified sepiolite was investigated. Meanwhile, the equilibrium and kinetic data of the adsorption process were studied to understand the adsorption mechanism. Furthermore, a high-temperature gas stream was applied to regenerate the adsorbent. The results showed that the Langmuir isotherm model was applied to describe ...


    By IWA Publishing

  • Rehabilitation of Hydrogen Grooving in Sulfuric Acid Line

    Around October 2001, one of the major petrochemical refineries located on the Texas Louisiana Gulf coast needed to rehabilitate 6' and 8” diameter “fresh acid” (98% sulfuric acid) lines. Such lines tend to suffer from internal gouging due to formation of hydrogen gas in voids, which are caused by turbulence at directional changes in the pipe flow such as elbows, etc. This is a natural event, ...


    By InduMar Products, Inc.

  • Peroxy-acid treatment of selected PAHs in sediments

    In an attempt to address some of the disadvantages of the common biotic and abiotic processes used for the degradation of Polycyclic Aromatic Hydrocarbons (PAHs), an alternative strategy utilising a primary chemical oxidative step to be combined with a biological post-treatment step was created. The degradation of α-methylnaphthalene, fluorene, phenanthrene, anthracene, pyrene and ...


    By Inderscience Publishers

  • Kimre Mist Eliminators in Sulfuric Acid Plants

    B-GON® Mist Eliminators are widely used in the gas cleaning and contact section of sulfuric acid plants. Metallurgical, Oleum Producing, Sulfur Burning, and Regeneration Plants rely on the mist eliminators in the drying towers, absorption towers, and many other units to protect the quality of the product acid, protect downstream equipment from corrosion, protect the catalysts, and ultimately ...


    By Kimre Inc.

  • Least-Cost Approaches to Reducing Acid Emissions

    ' The costs of meeting sulfur emission targets can be high. It is essential, therefore, that countries adopt policies which (a) minimize the net economic and social costs of reducing emissions to the agreed target levels, and (b) maximize the overlap between measures designed to reduce acidifying emissions and those addressing other forms of air pollution. This note discusses alternative ...


    By The World Bank

  • Case study - Purified terephthalic acid plant

    Overview A major chemical manufacturer required a pollution control system to destroy the halogenated volatile organic compounds (VOCs) emitted during the formulation of Pure Terephthalic Acid (PTA). During the production process, methyl bromide is converted to hydrogen bromide. The pollution control system had to be designed to withstand the corrosiveness of the hydrogen bromide and ...

  • Application of gas chromatography-mass spectrometry preceded by solvent extraction to determine volatile fatty acids in wastewater of municipal, animal farm and landfill origin

    This study describes extraction of selected volatile fatty acids (VFAs) (containing from 2 up to 8 carbon atoms) with methyl-tert-butyl ether (MTBE) from polluted aqueous samples followed by separation, identification and quantification by gas chromatography coupled with mass spectrometry (GC-MS). Extraction parameters such as time and number of extractions, volume ratio, effect of acidification ...


    By IWA Publishing

  • Characteristics and kinetics of hexavalent chromium reduction by gallic acid in aqueous solutions

    Gallic acid (GA) is a naturally occurring plant polyphenol compound. Experiments were conducted to study the kinetics and effects of pH, temperature, irradiation, and initial hexavalent chromium (Cr(VI)) concentration on Cr(VI) reduction by GA. Results indicated that Cr(VI) could be reduced to chromium oxide (Cr(III)) with GA in a wide range of pH values from 2.0 to 8.5. The reaction followed a ...


    By IWA Publishing

  • Acidity production and buffer requirements for in situ bioremediation of chlorinated solvents

    Acidity production and buffer model Developed batch abiotic model in PHREEQC-2 using overall stoichiometry for reductive dechlorination Reaction is divided in steps, buffer is added as required to maintain minimum design pH Model considers: Expected extent of dechlorination Site water chemistry H2 ...


    By True Blue Technologies, Inc.

  • Innovative wet electrostatic precipitators assure competitive edge in acid marketplace

    The unsteady global economic recovery continues to subject many core industries to persistent volatility in profits, prices, markets and capital investments. However, some analysts remain optimistic about the global international trade in sulfur in all forms, particularly sulfuric acid. This versatile mineral acid is both the world’s most widely used chemical, and the one with the highest ...


    By Beltran Technologies, Inc.

  • Replacement of Two Separator /Absorber Units at an Acid Regeneration Plant

    If professional engineers were asked to define a perfect world, their answer would no doubt include projects that were blessed with a clear and precise description of the requirements, a viable schedule, availability of materials, and a reasonable amount of design freedom. Of course there is no perfect world, so engineers must work with restrictions that vary from difficult to almost impossible. ...


    By Fabricated Plastics Limited

  • Downstream sulfuric acid plants benefit from WESP technology

    Industrial-grade sulfuric acid, still the most widely used industrial chemical in the world, continues to be sourced primarily (about 70 percent) as a nondiscretionary byproduct from the roasting, smelting, and refining of nonferrous metals. The rest comes from natural gas processing, electric power generation, and spent acid regeneration. These industries are usually heavy emitters of ...


    By Beltran Technologies, Inc.

  • Advanced gas detection technology supports arctic greenhouse gas research

    Enormous quantities of greenhouse gases (GHG) exist within Arctic ice and frozen soils, so with the threat of global warming, a clear understanding of the relationship between GHG in the atmosphere and in the ice/soil is vital because melting of permafrost could cause a dangerous climate tipping point. There can be few more challenging environments for monitoring gases, but PhD researcher Martin ...


    By Quantitech Ltd

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