selective catalytic reduction system Articles
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Economic evaluation for air pollution control technologies selection in power plants processes
Air quality legislation is entering a transformation phase, shifting the concept of atmospheric emission control towards pollution prevention and emission minimization through a more integrated approach. This transformation, along with public pressure and increased foreign trade, is providing industries with incentives to consider their effect on the environment and to take action where required. ...
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Case Study: SCR System for Ammonia Removal at Ethanol Producer
Catalytic Products International (CPI) installed an 18,000 SCFM CONCORD Selective Catalytic Reduction (SCR) system for the abatement of Ammonia (NH3), Volatile Organic Compound (VOC), and Nitrogen Oxides (NOx) at a Midwest USA cellulosic ethanol producer. Ethanol is a renewable fuel made from various plant materials collectively know as "biomass", which ferments sugars into alcohol. It can be ...
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Anguil Catalytic Recuperative Oxidizer (CATOX) destroys Hazardous Air Pollutants (HAPs) and Volatile Organic Compounds (VOCs)
The Anguil Catalytic Recuperative Oxidizer destroys Hazardous Air Pollutants (HAPs), Volatile Organic Compounds (VOCs), and odorous emissions at significantly lower temperatures than thermal oxidation technologies through the use of catalyst. HOW DOES THE CATOX WORK? VOC and HAP laden process gas is either pushed or pulled into a metal heat exchanger inside the oxidizer via a system fan. The ...
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A selective catalytic system for greenhouse gas (NOx) emission reduction at a 2–ethyl hexanol plant
Trends of ambient NOX levels in the Jubail Industrial City, Saudi Arabia, are increasing, and the regulators have identified areas requiring substantial reductions to control the atmospheric NOX concentrations. In this study, a Selective Catalytic Reduction (SCR) system for the control of NOX emissions in stack gases from 2–ethyl hexanol plant in the Jubail Industrial City was investigated. At ...
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What are the useful exhaust gas treatment equipment in the factory?
Several types of equipment are used to treat factory exhaust, depending on the specific pollutants that need to be removed. 5 common types of fee processing equipment 1. Wet scrubber: wet scrubber is a type of air pollution control device that uses a liquid (usually water) to remove pollutants from a gas stream. The gas stream is forced through a mist or spray of the liquid, which captures the ...
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Experience curves for power plant emission control technologies
This paper examines past experience in controlling emissions of sulphur dioxide (SO2) and nitrogen oxides (NOx) from coal-fired electric power plants. In particular, we focus on US and worldwide experience with two major environmental control technologies: flue gas desulphurisation (FGD) systems for SO2 control and selective catalytic reduction (SCR) systems for NOx control. We quantitatively ...
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Effects of a zeolite SCR system on comprehensive emissions from a heavy-duty diesel engine
The effects of a zeolite urea-selective catalytic reduction (SCR) aftertreatment system on a comprehensive spectrum of chemical species from diesel engine emissions were investigated in this study. Representative samples were collected with a newly developed source dilution sampling system after an aging process designed to simulate atmospheric dilution and cooling conditions. Samples were ...
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Axetris achieves Silver Gas Award 2013
Here the original text from G&I: „The Axetris AG LGD F200 self-contained laser gas detector module is designed for integration by original equipment manufacturers (OEMs) of selective catalytic reduction (SCR) systems and monitoring equipment and is based on proprietary technology- enhanced tuneable diode laser spectrometry. The OEM module can measure concentrations from well under 1 ppm ...
By Axetris AG
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Overview and status of post-combustion NOx control: SNCR, SCR and hybrid technologies
Requirements for reduced NOx emissions have required that emissions reduction technologies move beyond combustion controls alone. Post combustion NOx control technologies that are being applied to coalfired utility boilers include selective non catalytic reduction (SNCR), selective catalytic reduction (SCR), and combined SNCR/SCR systems (hybrid SNCR/SCR). This paper reviews these technologies ...
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The Requirement for SCR & SNCR
For decades coal has been the fuel of choice for most power stations around the world but also happens to be the most pollutant. The environmental regulation in Europe, China and India has stringent emission limits which coal fired power stations are finding it increasingly difficult and expensive to comply with and are therefore employing such systems as SCR and SNCR. Selective catalytic ...
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TDLS for a Cleaner Environment - Case Study
In this case study for Axetris Laser Gas Detection (LGD) products, Urs F. Boegli – Senior Application Engineer - looks at the historical perspective on the development of environment regulation and emission control technology. The European Community has published several directives to harmonize the legislation on industrial emissions. These include the Large Combustion Plant Directive ...
By Axetris AG
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6 Tips for Reducing NOx Emissions
Many industrial processes utilize the combustion of natural gas, oil, or coal. However, the combustion of these fossil fuels produces nitrogen oxide or NOx, which contributes to smog and air pollution. Finding an effective and efficient solution for emissions can be frustrating and time consuming. In addition, federal regulations and energy standards can change, impacting your operational ...
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JM News
Dr. Andy Walker, Johnson Matthey’s Heavy Duty Diesel Global Technology Director, is the winner of the Society of Automotive Engineers (SAE) 2006 Lloyd L. Withrow Distinguished Speaker Award. The award recognises the excellence and consistency of Dr. Walker's presentations at SAE technical sessions. To qualify for the Lloyd L. Withrow award, candidates must have already received the SAE's Oral ...
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Opterra opts for CTP AutoNox SCR
When NOx emission limits were lowered in Germany, CRH subsidiary Opterra Zement GmbH chose two innovative, new SCR systems from Austria-based CTP Chemisch Thermische Prozesstechnik to help reduce its NOx emissions to comply with the new and more stringent emission limits. Karsdorf, about 70km west of Leipzig, Germany, is a cement town with a long and proud history. Cement production began in ...
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Application of PdCe-HMOR catalyst as NOx CH₄-SCR system for heavy-duty vehicles moved by natural gas
Abstract In this work a cobalt-free zeolite-based catalyst formulation is proposed for NOx CH4-SCR towards a commercial application of after-treatment system for heavy-duty vehicles moved by natural gas (lean-gas burn engines). PdCe-HMOR catalyst was characterised by H2-TPR, DRS UV–Vis and TEM/EDS. The effect of [CH4]/[NO] in the gas feed was studied in order to assess the catalytic ...
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Case No: 504: Urea SCR System Installed on a 6555 HP Wärtsilä 16V32 Diesel Engine Used for Prime Power
Teck Cominco Alaska, Inc. had a need to control NOx emissions from their new Wärtsilä diesel engine at Red Dog Mine to meet Alaska DEC permitted NOx limits. The engine is operated more than 6,000 hours per year to provide prime power for the site. Background Teck Cominco Alaska Inc. (TCAK) operates the Red Dog Mine facility, located 90 miles north of Kotzebue, Alaska. Prime power for this ...
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The majority of U.S. facilities seeking control of glass furnace emissions have chosen Tri-Mer UltraCat Catalytic Filter Systems - Case study
Worldwide, more than 3 dozen glass furnaces use Tri-Mer ceramic filter technology and advanced Tri-Mer system design. These systems are operating in flat glass, container glass, and tableware. In the United States, Tri-Mer Catalytic Filter Systems readily meet EPA and state requirements for particulate (PM), SO2, HCl, metals, and NOx. Tri-Mer’s UltraCat is an ideal solution for glass ...
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LaCygne - GSG™ Graduated Straightening Grid Performance
KCP&L’s LaCygne Generating Station provides 1,532 MW of peak power to customers from the site south of Kansas City. LaCygne Unit 1 is an 815 MW B&W cyclone boiler with Over-Fire Air (OFA) and SCR NOx controls, and the second oldest WFGD installation in the country. LaCygne Unit 2 is a 717 MW B&W PC boiler with Low NOx Burners (LNB), OFA, and ESP particulate control. LaCygne1 ...
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A Modelling Approach to the Design Optimization of Catalytic Converters of IC Engines
ABSTRACT In this paper, a modelling approach to the design optimization of catalytic converters is presented. The first step of the optimization is the model-assisted sizing of catalysts. For a given inlet exhaust condition, a semi-empirical, experimentally calibrated, 0-D steady state catalyst model is employed to sort through a data base of catalysts under given restraints, yielding few ...
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NEO Monitors conquers the Quasi-impossible
China is a world factory powered by its abundant coal resource. China is facing a huge environmental challenge brought together with the fossil-fired power plants. China has therefore been conducting technical retrofit to the engines of its economy, by introducing emission control facilities. Selective Catalytic Reduction (SCR) technology is one of the most widely applied emission control ...
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