NOx control Articles
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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 solution for NOx ...
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CFD Analysis for NOx-Control in a Refinery
Refineries are required by law to reduce the emission of nitrous oxides (NOX) to the atmosphere. Spray nozzles are key components in the gas conditioning equipment used to control the humidity and temperature of the gases, providing controlled volumes of liquid with predictable drop size and consistent spray coverage. Knowing these values is vital for the optimization of gas conditioning ...
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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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Selected Literature from Johnson Matthey`s Environmental Catalysts and Technologies Division
SSEC Literature: High Temperature SCR Zeolite Catalyst for NOx Control / SCR Catalyst for NOx Control Stationary Lean Burn Engines / SCR Systems for NOx Control Stationary Lean Burn Engines / Gas Turbine Oxidation Catalyst for the control of CO and VOCs / Oxidation Catalysts for the Control of CO, VOC, HC / BanditoTM - Modular Catalytic Converter for the Control of NOx, CO and THC / Band-ItTM - ...
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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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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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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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Mechanistic insight in NO trapping on Pd/Chabazite systems for the low-temperature NOx removal from Diesel exhausts
Passive NOx Adsorbers (PNA) are a novel technology designed to reduce NOx emissions during the Diesel engine cold start period by adsorbing them at low temperature and thermally desorbing them once the downstream SCR catalyst becomes active. Despite the growing industrial interest in this technology, the mechanisms behind the NOx adsorption and the effects of the operative conditions still need ...
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`Sensitivity of Condensable Particulate Matter Speciation on Predicted Visibility Impacts – Case Study,` presented at the NCASI West Coast Conference, September 2005
Introduction This paper evaluates a realistic case study for an existing major emission source that is required to evaluate visibility impacts at a nearby federally-protected Class I area. The fictitious source is a 1960's era coal-fired electric generating unit (EGU) characterized as a pulverized coal-fired, dry bottom, wall-fired boiler equipped with PM and NOx controls (i.e., electrostatic ...
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Tri-NOx Multi-Chem Wet Scrubber. Case Study of Our NOx Scrubber in an Automotive Manufacturing Plant
Toyota Auto Body of California, Inc. (TABC) manufactures 170,000 truck beds per year at its Long Beach, CA facility. The company also makes catalytic converters, and generates NOx at several points within that process. A Tri-NOx scrubber has controlled those emissions with exceptional efficiency since its installation in 1988 To accommodate increased demand, the plant sought Tri-Mer's assistance ...
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Chemical Switch Cuts Costs, Improves Safety
By replacing the sodium sulfide chemistry used in its nitrogen oxide (NOx) scrubber with a non-hazardous NOx control chemistry, ChemResearch Co. Inc. (CRC; Phoenix, AZ) reduced its operating costs and eliminated a health and safety hazard. The BIONOxSOLVER™ chemistry, developed by Bionomic Industries Inc. (Mahwah, NJ), provides CRC with a safe, easy-to-handle, high-efficiency NOx scrubbing ...
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Tri-Mer’s UltraCat glass furnace emissions filters deliver significant advantages in terms of sorbent use, maintenance requirements, and redundancy - Case study
UltraCat Catalytic Filter systems require much less sorbent to reach a given SO2 removal than ESP. This is because the sorbent accumulates on the filter surface, creating a filter cake. All the gas must pass through this cake, adding exposure and time for sorbent chemistry to occur. This is true for any sorbent, SBC or hydrated lime. Another advantage is the built-in redundancy inherent in ...
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Exhaust Gas Treatments for NOx Reduction to Add to Global Warming
The enforcement of year 2007 stringent emission norm for reduced NOx reduction/oxides of nitrogen gases from the diesel exhaust and the after treatment to reduce them will add to global warming by several fold according to renowned engine combustion kinetics, emission control process expert and inventor -Mr.Srinivasan Gopalakrishnan, Hydrodrive Systems & Controls Pvt. Ltd, India. His ...
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Resin Pilot Plant - Case Study
As part of a commitment to reduce airborne emissions – or the risk of such emissions – the Mt. Vernon, IN plant of GE Plastics – now Saudi Arabia Basic Industries Corporation – installed a NOx scrubber. SABIC is a diversified manufacturing company, active in chemicals and intermediates. In 2014, it was ranked fourth in the world among chemical companies by Fortune Global ...
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Three-dimensional modelling of photochemical air pollution in Switzerland and comparison with a multi-parcel Lagrangian model
The photochemical smog situation in Switzerland on 29 July, 1993 was simulated using the 3-D grid model UAM (Urban Airshed Model) and the results were compared with those of a multi-parcel Lagrangian model. Sensitivity analyses concerning initial conditions, emissions, deposition, biogenic volatile organic compounds (VOC), and emission reductions were carried out. Results were compared with field ...
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Power Industry using Micro-Media Filtration and short-bed ion exchange
With the demand or higher efficiencies, lower maintenance and operating costs for boilwers and turbines, high-purity water treatment systems are becoming more crucial to the operation of power plants. Modern power plants, operating at supercritical and ultra upercritical boiler pressures and temperatures, require high-purity water that approaches quality levels at the theoretical levels. ...
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Overview of mercury control in coal-fired power plants
During combustion, the mercury (Hg) in coal is volatilized and converted to elemental mercury (Hg0) vapor in the high temperature regions of coal-fired boilers. As the flue gas is cooled, a series of complex reactions begin to convert Hg0 to ionic mercury (Hg2+) compounds and/or Hg compounds (Hgp) that are in a solid-phase at flue gas cleaning temperatures or Hg that is adsorbed onto the surface ...
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NOx treatment - case study
As part of a commitment to reduce airborne emissions – or the risk of such emissions – the Mt. Vernon, IN plant of GE Plastics – now Saudi Arabia Basic Industries Corporation – installed a NOx scrubber. SABIC is a diversified manufacturing company, active in chemicals and intermediates. In 2014, it was ranked fourth in the world among chemical companies by Fortune ...
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Tri-NOx Multi-Chem Wet Scrubber. Case Study of Our NOx Scrubber in a Plastics Resin Plant.
As part of a commitment to reduce airborne emissions – or even the threat of such emissions – the Mt. Vernon, IN plant of GE Plastics has installed a NOx scrubber. When such GE Plastics products as Ultem resins are produced, nitric acid is used, and emissions from this step are tightly controlled. But to address upset conditions, the company opted to install an emergency scrubber that can treat ...
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Operating experience on the treatment on fgd scrubber blowdown from existing generating stations
Amendments to the original 1990 Clean Air Act resulted in the initial SO2 control requirements for coalfired power plants in the mid1990’s. These amendments initiated a new phase of installation of Flue Gas Desulfurization (FGD) scrubbers in the United States. The Clean Air Interstate Rules (CAIR), first filed by the EPA in 2004, required that more stringent requirements for SO2 and NOx emission ...
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