nox removal scr catalyst Articles

  • Design of a dual-bed catalyst system with microporous carbons and urea-supported mesoporous carbons for highly effective removal of NOx at room temperature

    Abstract A dual-bed catalyst system is designed to remove NOx at room temperature, which consists of a microporous spherical activated carbon (SAC) layer and a urea-supported spherical mesoporous carbon (SMC) layer. The SAC layer, with plenty of narrow micropores acting as a nano-cage for NO adsorption, could improve the oxidation of NO into NO2, ...


    By ECO PHYSICS AG

  • Chemical Aspects of NOX Scrubbing

    With the passage of the 1990 Clean Air Act Amendments, many chemical and metal industries and utility producers will now be required to further limit the amount of NOX (Nitrogen Oxides) produced. NOX is a precursor to ozone in the atmosphere, and is believed to be a major contributor to acidic deposition (acid rain). Formation of ozone: NO2 + Hv ...


  • The Chemical Aspect of NOx Scrubbing

    With the passage of the 1990 Clean Air Act Amendments, many chemical and metal industries and utility producers will now be required to further limit the amount of NOx (Nitrogen Oxides) produced. NOx is a precursor to ozone in the atmosphere, and is believed to be a major contributor to acidic deposition (acid rain). Formation of ozone: NOx is produced in a variety of ...


    By CR Clean Air Group, LLC

  • NOx in Non-Utility Industries - Part II - Control options and monitoring methodology

     This the second in a two-part series. Part I, which appeared in our June 2001 issue focuses on air emission origins of nitrogen oxides (NOx) in non-utility industries. Choice of the NOx control technology is dependent on many factors, including regulatory requirements, technical feasibility, cost and public perception. Figure 1, compiled based on publications [1-5], presents a summary of ...


  • The Right Mix for Clean Air

    Reducing air pollution is an increasingly important topic all around the world. Many governments—also in developing countries—set new limits for emissions such as nitrogen oxides in flue gas. Sulzer offers advanced mixing technology for flue gas cleaning. The installation in a large power plant shows that these high-performance mixers can cope with the most difficult requirements. ...


    By Sulzer Management Ltd

  • MARPOL ANNEX VI Compliance Using a Portable Emissions Analyzer - Case study

    Marine vessels can emit air pollution such as CO, CO2, NOx (NO+NO2), and SO2 from their diesel engines and onboard incinerators. MARPOL Annex VI and the technical code for control of emissions of nitrogen oxides (NOx Technical Code) issued by IMO are internationally recognized regulations for the prevention of air pollution and emissions from marine ...

  • W.H. Sammis Plant Environmental Retrofits - Case study

    FirstEnergy Corp. Stratton, Ohio Project Overview The W.H. Sammis plant is the largest of FirstEnergy’s coal-fired electric generating facilities in Ohio. The plant consists of seven coal-fired units totaling 2,220 MW and is located along the Ohio River. In 2005, FirstEnergy embarked on one of the largest environmental retrofit projects in ...


    By Babcock & Wilcox MEGTEC LLC

  • Retrofitting diesel engines: reducing the emissions of our ideal power source

    Over the past several years, Avogadro Environmental has been working with a number of clients to develop proactive environmental programs as part of their EPA Performance Track and ISO 14001 management systems.  Many client companies that are proactively implementing measures to reduce their environmental footprint are looking for ideas.  Diesel engine retrofits for off-road stationary and mobile ...

  • Navigating NSPS subpart Db for boilers: a case study

    Over the past year, Trinity assisted a chemical company with the permitting and installation of a new 220 MMBtu/hr package boiler. The new natural gas-fired boiler replaces coal-fired units that were installed in the 1940s. Navigating through the numerous, and at times conflicting, regulatory requirements applicable to such a unit has been challenging. With careful planning and implementation, ...


    By Trinity Consultants

  • Intelligent Pollution Control

    The world faces difficult pollution control decisions. For every dollar spent on pollution control, there is an alternative investment in health improvement. For every dollar spent on reducing one pollutant, there is an alternative to reduce another. The most prudent course to make the best investment should include: Intelligent uncertainty Intelligent classification of options ...


    By The McIlvaine Company

  • Mercury Control Demonstrations

    C1.1 | Halogens and Sulfur in Coals and their Influence on Co-benefit Mercury Capture Bernhard Vosteen | President, Vosteen Consulting Gmbh Not only the range of the coal mercury content itself, but also the range of the native halogen and sulfur contents in coal are of great influence on co-benefit mercury capture, wet and dry. The ...

  • Advanced WESP designs assure superior gas cleaning performance

    Nowadays, many industries are facing formidable environmental challenges and there is a growing need for effective, economical gas cleaning and air pollution control equipment. Michael Beltran of Beltran Technologies, Inc. reports on a renewed interest in high-efficiency wet electrostatic precipitators (WESPs) and discusses their importance for controlling sulphuric acid mists and other ...


    By Beltran Technologies, Inc.

  • EPA Proposed “Franken-MACT” for Utilities

    EPA published the highly anticipated proposed Maximum Available Control Technology (MACT) Standard for the utility sector (40 CFR 63 Subpart UUUUU). When considered together with the growing list of proposed and final rules impacting the utility sector (Transport Rule/Cross-State Rule, Coal Combustion Byproducts Rule, Cooling Water Intake Rule, Regional Haze Rule, revised National Ambient Air ...


    By Trinity Consultants

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