emission limit Articles

  • Required changes in emission standards for high-frequency noise in power systems

    This paper discusses some recent developments that make the existing standards on the emission of high-frequency noise in power systems need to be reconsidered. It is shown that it is possible for an equipment to remain below the emission limits while at the same time the disturbance level increases beyond what was intended by the standard document. Further, the change from analog to digital ...


    By Inderscience Publishers

  • Vehicle Emissions – How to Catch Defeat Devices

    There are many vehicles that have a large impact on the environment in many places around the world. Today, pollutant emissions is a hot topic, both for legislators, the vehicle industry, and a concerned public. In the article “A Step-by-Step Methodology for Vehicle Testing to Catch Defeat Devices” by the International Council on Clean Transportation (ICCT) a ...


    By Opsis AB

  • Chemical Plant Desulfurization

    KRONOS’ facility in Leverkusen, Germany produces titanium dioxide, the most important material used by the paints and plastics industry for whiteness and opacity. When new German guidelines set maximum emission limits for SO2 in 1989, KRONOS was required to eliminate the COS from the off-gas at their titanium dioxide production facility to meet the new requirements.Complicating this application, ...


    By Merichem Company

  • The Effect of Phosphorus and Boron Lubricant Oil Additives on Catalyst Durability

    With ever-tightening legislation driving down emissions limits, minimisation of catalyst deactivation is very important. Attention has now focused on chemical poisoning of three-way catalysts (TWC) by elements commonly found in engine oil. ...

  • Reaching Euro VI emissions limits

    The requirements of low and lowest detectable exhaust analysis has prompted Eco Physics to launch a broad range of analyzers for NO/NOx detection. Emissions tuning is one of the targets of the EURO VI regulations as well as US EPA 2010, which are: Reduction of Particulate Matter (PM) and reduction of Nitrogen Oxides (NOx). In the past 15 years – since the first European regulation for exhaust ...


    By Eco Physics Inc.

  • Layered Reduction Technologies for Effective NOx Control

    The control of nitrogen oxides (NOx) is a well-known requirement for utility and industrial furnaces alike.  Although the regulations and corresponding emission limits vary greatly, the need for substantial reduction is becoming universal.  There are a few existing NOx reduction technologies which have been proven effective in a variety of applications.  The most appropriate ...


    By Fuel Tech, Inc.

  • New Regulations for Biomass and Other Alternatative Fuels

    EPA completed new rules that changed the way they look at "nontraditional" fuels. Using these alternative fuels to generate energy makes a facility subject to emission limits and rules regulation boilers. In December U.S. Environmental Protection Agency (EPA) completed new rules that changed the way they look at'nontraditional" fuels. Materials that can meet the newly revised standards are ...

  • VOC`s oxidation

    Real Decreto 117/2003, dated 31st January related to Volatile Organic Compounds emission limits, due to organic solvents, as well as Law 16/2002, dated 1st July, related to prevention and integrated control of pollution (IPPC), came into force, which will impel many industries to set devices for the treatment and elimination of gases effluents with different organic compounds content. Here, we ...


    By Kalfrisa, S.A.

  • Kyoto Pact`s Long-Term Prospects Sketched Out

    The most detailed assessment yet of how the world could begin to agree on medium to long-term climate change commitments has been released by Germany's environment agency. Despite present political deadlock there are grounds for optimism, the study by consultancy Ecofys concludes. Currently the Kyoto protocol imposes quantified emission limitation targets, affecting only industrialised countries ...

  • A brief history of technology-forcing motor vehicle regulations

    Faced with the worst air quality in the United States, California began in the 1960s to pursue a “technology-forcing” approach in establishing motor vehicle tailpipe emission standards. This approach sought to advance vehicle pollution control technology by establishing future tailpipe emission limits even if no technologies existed to meet them at the time regulators set the standards. The U.S. ...

  • A new approach to SSM emissions management

    On October 16, 2009, the United States Court of Appeals for the District of Columbia Circuit (DC Circuit) mandated the vacatur of the “Startup, Shutdown, and Malfunction (SSM) exemption” allowed under General Provisions in Subpart A of the National Emission Standards for Hazardous Air Pollutants (NESHAP).1  Under the SSM exemption, NESHAP Subpart A previously stipulated that an ...


    By Trinity Consultants

  • `Variability of NOx Emissions from Precalciner Cement Kiln Systems,` presented at the 2004 AWMA annual conference

    Abstract In 2003, there were forty-two precalciner kilns out of about 190 total Portland cement kiln systems operating in the United States. As a class, precalciner kiln systems have the lowest annual mass emissions of the oxides of nitrogen (NOx) per ton of clinker when compared to wet, long-dry and preheater kiln systems; however, like all cement kilns, precalciner systems experience ...


    By Trinity Consultants

  • Variability of NOx Emissions from Precalciner Cement Kiln Systems

    In 2003, there are forty-two precalciner kilns out of about 190 total portland cement kiln systems operating in the United States. As a class, precalciner kiln systems have the lowest annual mass emissions of the oxides of nitrogen (NOx) per ton of clinker when compared to wet, long-dry and preheater kiln systems, however, like all cement kilns, precalciner systems experience significant ...


    By Trinity Consultants

  • Normalisation in Emissions Monitoring – What Does It Mean?

    Emission sources (stack emissions) are found across different industries including power generation, cement production, steel making, energy from waste, chemicals processing, oil and gas refining and food processing. Emission monitoring systems that measure emissions released into the atmosphere are used to demonstrate compliance with environmental regulations. It is preferred, to report gaseous ...


    By Codel International Ltd

  • Chemical components of bleached eucalypt kraft pulp effluent COD and treatment removal efficiency during normal mill operation and maintenance shutdowns

    In order to meet increasingly strict Brazilian COD emissions limits, mills must understand the components that contribute to effluent COD, how these vary between normal mill operation and maintenance shutdowns, and how this variation affects treatment efficiency. To this end, primary and secondary effluents from a Brazilian bleached eucalypt kraft pulp mill activated sludge system were analyzed ...


    By IWA Publishing

  • Air Rule for Cement Kilns Requires 92 Percent Cut in Mercury Emissions

    Portland cement kilns will be required to reduce emissions of mercury by 92 percent as part of an Environmental Protection Agency final rule announced Aug. 9 that imposes controls for several toxic pollutants. Although most of the emissions standards in the final rule are less stringent than what the agency had proposed in 2009, the cement industry said the cost to operate the required controls ...


    By Ohio Lumex

  • Certification of automated measuring systems - New regulations and new opportunities

    The type approval and certifi cation of automated measuring systems is since several years an important topic for the manufacturers of automated measuring systems. In the UK and Germany national certifi cation systems and minimum requirements for CEMS were implemented long time ago. In the year 2004 a uniform system for the quality assurance of automated systems was introduced in Europe with the ...

  • Proposed boiler MACT sets aggressive emission limits

    On June 4, 2010, U.S. EPA proposed National Emission Standards for Hazardous Air Pollutants (NESHAP) for industrial, commercial, and institutional boilers and process heaters at both major and area sources of hazardous air pollutants (HAP) emissions.  EPA proposed separate rules for units at major sources of HAP emissions (greater than 10 tons per year [tpy] of any single HAP and/or greater ...


    By Trinity Consultants

  • Chapter 3: Uncertainty in economic models of optimal energy use

    In the economics of non-renewable resources, the problem of eating the cake when its size is unknown constitutes an essential feature of uncertainty. Such a model was proposed by Gilbert (1979) and he obtained results that were both illuminating and suggestive. The problem of consuming an exhaustible resource when there is ignorance about its size is analytically equivalent to the more recent ...


    By Inderscience Publishers

  • Formaldehyde exposure in the workplace – How do you know if it’s harming you?

    There are both short term and long term exposure hazards from formaldehyde. The primary problem is inhalation of the chemical but it is also known to cause skin irritation and allergic reactions. EPA has now listed formaldehyde as a suspect human carcinogen. Animal studies have shown an increase in nasal cell cancer and some limited human studies have shown an increased incidence of nasal and ...


    By Atlantic Environmental, Inc.

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