Deep catalytic treatment of waste gas from sulfur dioxide, nitrogen oxides and carbon monoxide at processing products of detoxication of toxic substances

In this paper we present the characteristics of sensors used to monitor the pollution levels in Mexico City, namely sulfur dioxide (SO2), nitrogen oxides (NOx), ozone (O3), , and carbon monoxide (CO). A novel algorithm to predict contamination levels is presented: the Gamma classifier. Also, a new coding technique is introduced, allowing the conversion from a series of values taken from SIMAT databases into a set of patterns, which in turn are useful for the task of pollutant forecasting. Experimental results show a competitive performance by the Gamma classifier as a predictor, when compared to other methods.

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The Danger of Toxic Substances

Acta Polytechnica ◽

10.14311/346 ◽

2002 ◽

Vol 42 (3) ◽

Author(s):

M. V. Jokl

Keyword(s):

Carbon Monoxide ◽

Nitrogen Oxides ◽

Cigarette Smoke ◽

Building Materials ◽

Human Organism ◽

Toxic Substances ◽

Air Filtration ◽

Effective Measure ◽

Volatile Organic ◽

Sunny Weather

Toxic (harmful) gases enter building interiors partly from outdoors (sulfur oxides, nitrogen oxides, carbon monoxide, ozone, smog and acid rains), partly originate indoors - as a result of human activity (carbon monoxide, tobacco smoke, nitrogen oxides, ozone, hydrocarbons) and also emanate from building materials (formaldehyde, volatile organic compounds). The human organism is most often exposed to cigarette smoke (especially nonsmokers are endangered, as cigarette smoke devastes the pulmonary and cardiovasculary system) and to smog entering from outdoors, paradoxically during sunny weather. Preventing toxic production is the most effective measure, e.g., by coaxing to coax smokers out of "civilized" areas, by using energy rationally (i.e., conserving energy), to turn to pure fuels and to increase energy production by non-combustion technologies. Besides ventilation and air filtration, the toxic gases can be removed to a remarkable extent by plants (by which decay the substances into nontoxic gases), and by air ionization. Review article.

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A Cost Effective Advanced Emissions Monitoring Solution for Gas Turbines: Statistical Hybrid Predictive System That Accurately Measures Nitrogen Oxides, Carbon Monoxide, Sulfur Dioxide, Hydrocarbon and Carbon Dioxide Mass Emission Rates

Volume 3: Combustion, Fuels and Emissions, Parts A and B ◽

10.1115/gt2008-50401 ◽

2008 ◽

Cited By ~ 1

Author(s):

Brian Swanson

Keyword(s):

Carbon Dioxide ◽

Carbon Monoxide ◽

Quality Assurance ◽

Sulfur Dioxide ◽

Nitrogen Oxides ◽

Monitoring System ◽

Gas Turbines ◽

Continuous Monitoring ◽

Cost Effective ◽

Performance Specification

U.S. Federal regulations under Title IV of the Clean Air Act Amendments promulgated in 1990 require continuous monitoring of nitrogen oxides (NOx) and carbon dioxide emissions from large gas turbines. Local, regional, or State authorities may mandate continuous monitoring for carbon monoxide, sulfur dioxide, volatile organic compounds, and other specific pollutant parameters. U.S. regulations that require continuous emissions monitoring systems (CEMS) also allow for the use of predictive approaches as an alternative providing the installed predictive emissions monitoring system (PEMS) meets rigorous performance specification criteria and the site performs ongoing quality assurance tasks such as periodic audits with portable analyzers and annual accuracy testing. A statistical hybrid predictive emission monitoring system (PEMS) has been deployed at numerous sites in the United States to meet EPA requirements for continuous monitoring of gas turbine pollutant emissions. This paper discusses specific implementations of a unique cost-effective statistical hybrid PEMS on various classes of gas turbines ranging in size from 60kW to 180 MW, both gas-fired and liquid-fired units, in simple cycle and combined cycle mode of operation. The turbines were equipped with a variety of NOx control strategies including dry low NOx, steam and water injection, solid post-combustion catalyst, SoLoNOx™, and selective catalytic reduction. In each instance the predictive engine operated on training data of at least three days and up to ninety days as required to develop a robust empirical model of the emissions. Each model was subsequently evaluated using standard U.S. EPA performance specification test methods. The results of PEMS performance testing on these gas turbines are presented along with additional information regarding the quality assurance and quality control procedures put in place and the costs to support the ongoing operation of the deployed compliance statistical hybrid PEMS.

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Air quality at Santiago, Chile: a box modeling approach—I. Carbon monoxide, nitrogen oxides and sulfur dioxide

Atmospheric Environment ◽

10.1016/s1352-2310(01)00417-4 ◽

2002 ◽

Vol 36 (2) ◽

pp. 315-330 ◽

Cited By ~ 19

Author(s):

Héctor Jorquera

Keyword(s):

Carbon Monoxide ◽

Air Quality ◽

Sulfur Dioxide ◽

Nitrogen Oxides ◽

Modeling Approach

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Analysis of the 11-year Record (1987-1997) of Air Pollution measurements in Athens, Greece. Part I: Primary air pollutants

Global NEST Journal ◽

10.30955/gnj.000135 ◽

2013 ◽

Vol 1 (3) ◽

pp. 157-167 ◽

Cited By ~ 3

Keyword(s):

Air Pollution ◽

Carbon Monoxide ◽

Sulfur Dioxide ◽

Nitrogen Oxides ◽

Air Pollutants ◽

Pollution Abatement ◽

Diesel Oil ◽

Atmospheric Pollutants ◽

Black Smoke ◽

Almost All

A climatological analysis of atmospheric concentrations of primary air pollutants in Athens, Greece, is presented for the 11-year period 1987-1997, since the automated local air pollution network operating by the Ministry of Environment started to record all conventional pollutants. The concentration levels of the atmospheric pollutants carbon monoxide, nitrogen oxides, sulfur dioxide and black smoke for the most polluted stations (Patission, Athinas and Piraeus) of the air pollution network were examined. For all primary pollutants a seasonal variation with minimum in summer and maximum in winter is observed. Sulfur dioxide has the strongest seasonal cycle and black smoke the weakest. There is a significant downward trend for almost all pollutants in all stations. The highest reductions are observed in Patission where a comparison between the 3-year periods 1988-1990 and 1995-1997 gives 52%, 34%, 26% and 20% decreases for sulfur dioxide, carbon monoxide, nitrogen oxides and black smoke, respectively. The pollution abatement measures taken by the state authorities during the period 1990-1994, mainly consisting in the replacement of the old technology gasoline-powered private cars and the reduction of the sulfur content in diesel oil, seem to be the primary cause of the improvement in air quality in Athens during the recent years.

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Summer ozone variation in North China based on satellite and site observations

10.5194/acp-2018-537 ◽

2018 ◽

Author(s):

Lihua Zhou ◽

Jing Zhang ◽

Hui Wang ◽

Wenhao Xue ◽

Xiaohui Zheng ◽

...

Keyword(s):

Carbon Monoxide ◽

Sulfur Dioxide ◽

Nitrogen Oxides ◽

Nitrogen Dioxide ◽

Tropospheric Ozone ◽

North China ◽

Spatial Scales ◽

Gas Content ◽

Near Surface ◽

Fine Particulate

Abstract. Compared with other regions, air pollution in North China is very serious, especially its levels of fine particulate matter, which are closely associated with the concentrations of polluting gases, such as nitrogen oxides, sulfur oxides, organic gases, and ozone. Fine particle pollution has been studied in-depth, but there is less known about ozone. This paper focuses on the interannual variability of tropospheric ozone in North China and identifies its influential factors. Our analysis relies on satellite observations (ozone, nitrogen dioxide, sulfur dioxide, carbon monoxide and formaldehyde concentrations) and near-surface data (carbon monoxide, sulfur dioxide, nitrogen dioxide, fine particulate concentrations, temperature, and humidity). Studies have shown that the tropospheric ozone column in North China has been at a high level for the past 3 years, with the similar time series for temperature and formaldehyde. However, trends in ozone are opposite to those of sulfur dioxide and nitrogen dioxide over this 3-year period. This indicates that the increase in ozone in North China was mainly caused by the increase in temperature and an increase in organic gas content, rather than by nitrogen oxides. Over both temporal and spatial scales, the production rate of ozone appears to be most sensitive to temperature change, as ground observations in Beijing have suggested.

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