nox emissions Articles

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NOx and SOx Emissions Trading in Ontario

by Environmental Markets Association  (Jan. 1, 2001)

Erik Haites outlines an unusual emissions trading programme due to begin next year. The government of Ontario recently announced its intention to establish an emissions trading programme for NOx and SOx emissions (oxides of nitrogen and sulphur) from all coal- or oil-fired electric generating plants in the province with a capacity greater than 25 ...

NOx Control on a Budget

by Entropy Technology & Environmental Consultants, Inc. (ETEC)  (Jul. 1, 2003)

National, regional and local regulations to reduce NOx emissions have prompted the development and implementation of a number of NOx control technologies – from selective catalytic reduction and low-NOx burners to overfire air and flue gas recirculation. Induced flue gas recirculation (IFGR), a design derivative of conventional forced flue gas ...

Research NOx Analyzers

by ECO PHYSICS, INC.  (Oct. 14, 2010)

ECO PHYSICS provides environmental experts with exceptionally sensitive and precise NOx measurement instruments. Please take a look at our newest press release on our research NOx analyzers below. Bound by the same laws of nature, ecology and physics are close associates in an on-going battle to preserve air quality around the globe. One of our ...

Case No : 601: Reducing NOx emissions from Nirtic Acid Manufacturing Plants with NOx Abatement or NSCR

by Johnson Matthey Emission Control Technologies  (Jan. 1, 2006)

NOx Abatement is a Non-Selective Catalytic Reduction (NSCR) technology that has a long and proven track record for controlling NOx emissions from nitric acid manufacturing plants. It can be used to alter the NO to NO2 balance (decolourization) or to eliminate NOx through catalytic reaction with a fuel as a reductant. ...

Exergy analysis of combustion characteristics and NOx emissions of a dual–fuel engine

by Inderscience Publishers  (Jun. 26, 2012)

The combustion characteristics and NOx emissions of compression ignition engines working on a dual fuel mode are investigated numerically and their exergetic efficiencies are determined. The model has been validated with available experimental results. The simulation results show that dual fuel engine combustion and trend of NOx ...

A novel approach for modelling of NOx emission reduction in a tangentially fired coal boiler

by Inderscience Publishers  (Jun. 24, 2013)

In this research paper, predictive modelling of NOx emission of a 210 MW capacity pulverised coal–fired boiler and combustion parameter optimisation to reduce NOx emission in flue gas is proposed. The effects of oxygen concentration in flue gas, coal properties, coal flow, boiler load, air distribution scheme, flue gas outlet temperature and ...

Variability of NOx Emissions from Precalciner Cement Kiln Systems

by Trinity Consultants  (Jul. 26, 2004)

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, ...

NOx Emissions trading scheme repealed in the Netherlands — Global Impacts?

by Enhesa - Global EHS & Product Compliance Assurance  (Feb. 5, 2013)

The once-trailblazing Dutch Nitrogen Oxides Emission Trading Scheme (NOx ETS) is to be repealed: what are the effects? In recent years, Emissions Trading Schemes have gained momentum around the world.  Hundreds upon thousands of companies have had to adapt to be able to handle the effects of more stringent regulation. The Netherlands ...

CFD Analysis for NOx-Control in a Refinery

by Spraying Systems Co.  (May 1, 2007)

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 ...

Theory of Cost Effective NOx Control

by Entropy Technology & Environmental Consultants, Inc. (ETEC)  (Apr. 18, 2007)

NOx is one of the primary air pollutants emitted from combustion processes and environmental regulations are the only driver forcing industry to install NOx control systems. In the Houston Galveston area alone, there is over 6,000 point sources that would need to be controlled to comply with the new State Implementation Plan adopted by the TNRCC. ...

Layered Reduction Technologies for Effective NOx Control

by Fuel Tech, Inc.  (Jan. 3, 2012)

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 ...

Advanced SNCR - NOx Reduction on Large Utility Boilers

by Fuel Tech, Inc.  (Nov. 3, 2015)

Fuel Tech has recently completed full-scale demonstrations of Advanced Selective NonCatalytic Reduction systems on a number of large utility boilers (>600MW) firing a variety of fuel types. The systems use the latest flexible injection technology and are controlled with a balanced algorithm utilizing unit load, a full grid of continuous furnace ...

Comparison of measured and modelled NO2 values at Zurich airport, sensitivity of aircraft NOx emissions inventory and NO2 dispersion parameters

by Inderscience Publishers  (Feb. 8, 2011)

This paper presents a comparison of modelled and measured annual mean NO2 concentrations around Zurich airport. Modelled concentrations were derived from the LASAT Lagrangian model for the airport and from a Gaussian plume model for the Zurich canton. The measured annual mean NO2 concentrations were monitored at stations within the airport. The ...

A selective catalytic system for greenhouse gas (NOx) emission reduction at a 2–ethyl hexanol plant

by Inderscience Publishers  (Jul. 26, 2012)

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 ...

Advantages of a real-time emissions data management system for nox reduction record keeping and reporting

by Wood Group Mustang, Inc.  (Jan. 9, 2004)

Lyondell-Citgo Refining, LP (LCR), a 270,000 bbl/day refinery located in the Houston/Galveston Area, has successfully implemented a real-time process historian based system for meeting the monitoring, record keeping, and reporting requirements under the Texas Commission on Environmental Quality’s (TCEQ’s) NOx Reduction rules. This paper presents ...

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

by Trinity Consultants  (Jul. 26, 2004)

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 ...

Combinations of Measures for Reduction of NOx & Nanoparticles of a Diesel Engine

by Vestlandsforsking  (Feb. 1, 2012)

Reduction of NOx- and particle emissions of Diesel engines is worldwide an important challenge for the engineers. Some unregulated components, like NO2, NH3 and naoparticles NP came in the focus of attention in the last years.Application of EGR and / or SCR can lower NOx, using RME (Bxx) can increase NOx. What happens with NP, parameter which ...

Cost-Effective NOx Control for Air-Preheated Systems

by Entropy Technology & Environmental Consultants, Inc. (ETEC)  (Apr. 18, 2007)

New advancements in combustion control technologies, such as flue gas recirculation (FGR) and low NOx burners (LNB), have made it possible to achieve ultra low NOx levels without using expensive post-combustion flue gas clean-up technology. For some natural draft units it may be possible to meet the most stringent of the NOx regulations with ...

Relation between ozone levels and NOx and VOC emissions in the Sao Paulo Metropolitan Area for an episode of August, 1998

by Inderscience Publishers  (Nov. 6, 2008)

At present, major efforts in air pollution control for urban areas are oriented to reduce ozone levels to below standards. Models are a useful tool for air quality assessment and they can help to select the best strategy plan to reduce ozone levels in a polluted area. Like other large cities in the world, Sao Paulo Metropolitan Area (SPMA) has ...

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