Investigation on combustion, gaseous pollutants emission and ash characteristics during co-combustion of semicoke and coal slime

2021 ◽  
pp. 106249
Author(s):  
Ruidong Zhao ◽  
Ruowei Dai ◽  
Tianju Chen ◽  
Jianguang Qin ◽  
Jinzhi Zhang ◽  
...  
Keyword(s):  
Gaseous Pollutants ◽  
Pollutants Emission ◽  
Coal Slime

Evaluation of Gaseous Pollutants Emission Rate from Marvdasht Landfills

2016 ◽  
Vol 2 (1) ◽  
pp. 162 ◽  
Author(s):  
Amirreza Talaiekhozani ◽  
Bahman Masomi ◽  
Seyed Mohammad Javad Hashemi
Keyword(s):  
Emission Rate ◽  
Gaseous Pollutants ◽  
Pollutants Emission

scholarly journals A Systematic Study on the Analysis of the Emission of CO, CO2 and HC for Four-Wheelers and Its Impact on the Sustainable Ecosystem

2020 ◽  
Vol 12 (17) ◽  
pp. 6707
Author(s):  
Rohit Sharma ◽  
Raghvendra Kumar ◽  
Pradeep Kumar Singh ◽  
Maria Simona Raboaca ◽  
Raluca-Andreea Felseghi
Keyword(s):  
Statistical Data ◽  
Survival Rates ◽  
Gaseous Pollutants ◽  
High Survival ◽  
Different Types ◽  
Pollutants Emission ◽  
Standard Values ◽  
The Government ◽  
Carbon Dioxide Co2

The urbanization in Delhi NCR has led to a rapid increase in the vehicle count concerning the rise in population and mobilization. The emissions from the vehicles are currently counted amongst the main sources of air pollution in Delhi. This affects the quality of air. The emission criterion of various pollutants that are emitted from vehicles is evaluated through various International models, which include various vehicles, their modes of pollutants emitted while driving and other factors that are affecting the weather. The approximate emission of pollutants such as Carbon Monoxide (CO) and/or Particulate Matter (PM), from a variety of vehicles and different fuel types, has undergone diurnal variation over the years, depending on the time of the day. This study presents the emission factor of gaseous pollutants Hydrocarbons (HC), Carbon Monoxides (CO) and Carbon Dioxide (CO2) of 181 four-wheeler cars from different companies containing different types of fuels. The measurement of gaseous pollutants is performed for Delhi, the most polluted city in India. The various facts and data were calculated and analyzed with reference to the standard values set by the national schemes of the Pollution and Environment. Based on this statistical data obtained and analyzed, the scenarios regarding future vehicle growth rate and its impact on air quality are mentioned to overcome emission problems. Therefore, it is important to develop and deploy methods for obtaining real-world measurements of vehicle emissions, to estimate the pollutants. The analysis shows that few parameters need to be a concern for reducing the pollutants emission by vehicles. These major parameters are the high survival rates, decrease in annual mileage and major enforcement for three-to-five-year-old vehicles. This study shows that many old vehicles are used in different regions of the country, regardless of many notifications of banning old vehicles by the Government of India. These old vehicles are the major source of vehicle pollutants. The analysis stated that the diesel engine would emit less CO2/km than a petrol engine if having an almost similar engine capacity.

Research on Forecasting Model of Gaseous Pollutants Emission of Diesel Public Transport

2012 ◽  
Vol 518-523 ◽  
pp. 2753-2761
Author(s):  
Xiao Ning Wang ◽  
Yu Sheng Ci ◽  
Ke Deng ◽  
Shuai Tang
Keyword(s):  
Influencing Factors ◽  
Public Transport ◽  
Public Transit ◽  
Forecasting Model ◽  
Gaseous Pollutants ◽  
Strong Regularity ◽  
Validity Test ◽  
Pollutants Emission ◽  
Diesel Buses

Based on the strong regularity of public transit, this paper presents analysis of influencing factors of buses gaseous pollutants emission at first. Then through separating the bus running process into several parts, a quantitative forecasting model of gaseous pollutants emission of diesel buses and a validity test of this model are manifested.

Photo-catalytic degradation of gaseous pollutants in paper mills of southern China

TAPPI Journal ◽  
2018 ◽  
Vol 17 (03) ◽  
pp. 167-178 ◽  
Author(s):  
Xin Tong ◽  
Jiao Li ◽  
Jun Ma ◽  
Xiaoquan Chen ◽  
Wenhao Shen
Keyword(s):  
Degradation Rate ◽  
Southern China ◽  
Catalytic Degradation ◽  
Pulp And Paper ◽  
Gaseous Pollutants ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Initial Concentration ◽  
First Order ◽  
First Order Kinetics

Studies were undertaken to evaluate gaseous pollutants in workplace air within pulp and paper mills and to consider the effectiveness of photo-catalytic treatment of this air. Ambient air at 30 sampling sites in five pulp and paper mills of southern China were sampled and analyzed. The results revealed that formaldehyde and various benzene-based molecules were the main gaseous pollutants at these five mills. A photo-catalytic reactor system with titanium dioxide (TiO2) was developed and evaluated for degradation of formaldehyde, benzene and their mixtures. The experimental results demonstrated that both formaldehyde and benzene in their pure forms could be completely photo-catalytic degraded, though the degradation of benzene was much more difficult than that for formaldehyde. Study of the photo-catalytic degradation kinetics revealed that the degradation rate of formaldehyde increased with initial concentration fitting a first-order kinetics reaction. In contrast, the degradation rate of benzene had no relationship with initial concentration and degradation did not conform to first-order kinetics. The photo-catalytic degradation of formaldehyde-benzene mixtures indicated that formaldehyde behaved differently than when treated in its pure form. The degradation time was two times longer and the kinetics did not reflect a first-order reaction. The degradation of benzene was similar in both pure form and when mixed with formaldehyde.

scholarly journals Development of a Line Source Dispersion Model for Gaseous Pollutants by Incorporating Wind Shear near the Ground under Stable Atmospheric Conditions

2020 ◽  
Vol 4 (1) ◽  
pp. 17
Author(s):  
Saisantosh Vamshi Harsha Madiraju ◽  
Ashok Kumar
Keyword(s):  
Air Pollution ◽  
Urban Areas ◽  
Wind Shear ◽  
Dispersion Model ◽  
Near Field ◽  
Ground Level ◽  
Gaseous Pollutants ◽  
Air Pollution Control ◽  
Mobile Sources ◽  
Input Variables

Transportation sources are a major contributor to air pollution in urban areas. The role of air quality modeling is vital in the formulation of air pollution control and management strategies. Many models have appeared in the literature to estimate near-field ground level concentrations from mobile sources moving on a highway. However, current models do not account explicitly for the effect of wind shear (magnitude) near the ground while computing the ground level concentrations near highways from mobile sources. This study presents an analytical model based on the solution of the convective-diffusion equation by incorporating the wind shear near the ground for gaseous pollutants. The model input includes emission rate, wind speed, wind direction, turbulence, and terrain features. The dispersion coefficients are based on the near field parameterization. The sensitivity of the model to compute ground level concentrations for different inputs is presented for three different downwind distances. In general, the model shows Type III sensitivity (i.e., the errors in the input will show a corresponding change in the computed ground level concentrations) for most of the input variables. However, the model equations should be re-examined for three input variables (wind velocity at the reference height and two variables related to the vertical spread of the plume) to make sure that that the model is valid for computing ground level concentrations.

Chemical looping gasification of Chlorella: Parametric optimization, reaction mechanisms, and nitrogen-containing pollutants emission

Fuel ◽  
2021 ◽  
Vol 289 ◽  
pp. 119987
Author(s):  
Beibei Yan ◽  
Zhiyu Li ◽  
Liguo Jiao ◽  
Jian Li ◽  
Guanyi Chen ◽  
...  
Keyword(s):  
Reaction Mechanisms ◽  
Parametric Optimization ◽  
Chemical Looping ◽  
Pollutants Emission

Analysis of improvement effect of PM2.5 and gaseous pollutants in Beijing based on self-organizing map network

2021 ◽  
Vol 70 ◽  
pp. 102827
Author(s):  
Shuang Liu ◽  
Atul Gautam ◽  
Xingchuan Yang ◽  
Jing Tao ◽  
Xinyu Wang ◽  
...  
Keyword(s):  
Gaseous Pollutants ◽  
Self Organizing Map ◽  
Improvement Effect ◽  
Self Organizing

Determination of the flight trajectory in terms of emission and fuel consumption minimization

2021 ◽  
pp. 095441002110122
Author(s):  
Małgorzata Pawlak ◽  
Michał Kuźniar ◽  
Andrzej R. Majka
Keyword(s):  
Fuel Consumption ◽  
Negative Impact ◽  
Weather Conditions ◽  
Air Transport ◽  
Cycle Phase ◽  
Horizontal Flight ◽  
Pollutants Emission ◽  
Aircraft Trajectory ◽  
Air Speed ◽  
Constant Altitude

The present-day world is characterized by the intense development of air transport. However, along with it, significant problems appear. Among these problems, the most important are those relating to safety and negative impact of air transport on the environment. Air transport efficiency and profitability issues, although not critical, must also be taken into account because they decide about the intensity of development of this branch of transport. There are currently two large programs in Europe oriented at improving safety, environmental, and efficiency indicators. These are SESAR 2020 and Clean Sky 2, being a continuation of previous ones. One of the ways to reduce negative impact of air transport on the environment and improve its efficiency is to reduce fuel consumption and pollutants emissions resulting from fuel combustion. To find solutions with the abovementioned features, it is necessary to have sufficiently accurate models to estimate the amount of fuel consumed and the amount of pollutants emitted. Developing a sufficiently accurate model to determine fuel consumption and pollutants emission was performed. Due to the specificity of the missions carried out by passenger aircraft, the focus was on the cruise stage when aircraft flies at a constant altitude with a constant air speed. The result of the analysis was the development of methodology for fuel consumption and emission of main pollutants in cruise conditions. Specific fuel consumption is calculated for the thrust required for horizontal flight at cruising altitude. Emission indexes for CO, NOx, HC, and CO2 for the cruise have been determined based on known indexes for the landing and take-off cycle phase, after applying appropriate corrections. An illustration of the application of the developed methodology was the optimization of a medium-sized transport aircraft trajectory on a selected connection to determine a trajectory characterized by a minimum emission value taking into account weather conditions.

An Automated Mobile Laboratory for Continuous Monitoring of Atmospheric Pollutants

1980 ◽  
Vol 194 (1) ◽  
pp. 357-364
Author(s):  
R. M. Harrison ◽  
H. A. McCartney
Keyword(s):  
Continuous Monitoring ◽  
Air Pollutant ◽  
Atmospheric Pollutants ◽  
Gaseous Pollutants ◽  
Mobile Laboratory ◽  
Digital Form ◽  
Pollutant Concentrations ◽  
Particulate Pollutants ◽  
Nitrate Fertilizer ◽  
Wet Chemical

The construction and operation of an automated mobile laboratory for continuous air pollutant monitoring are described. The gaseous pollutants sulphur dioxide, nitric oxide, nitrogen dioxide and ozone are monitored continuously, whilst particulate pollutants are collected for subsequent wet chemical analysis. Gaseous pollutant concentrations together with measurements of wind direction and speed and solar radiation are recorded continuously in both analogue and digital form. The problems inherent in siting and operating the mobile laboratory are discussed and the analysis of monitoring data is illustrated with reference to a recent survey carried out in the vicinity of an ammonium nitrate fertilizer works.

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