scholarly journals Experimental study applied to the lime hydration process, in a thermoelectric coal power plant unit

2020 ◽  
Author(s):  
Rodrigo Saraiva Dantas ◽  
Maria Alejandra Liendo ◽  
Vera Lucia Duarte Ferreira ◽  
Rodrigo Bortoluzzi
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Hydrated Lime ◽  
Hydration Process ◽  
Maximum Temperature ◽  
Main Process ◽  
Coal Power Plants ◽  
Coal Power ◽  
The Impact

Abstract Coal Power Plants need to control SO 2 emissions to the atmosphere from the boiler flue gases, in order to reach standards according to guidelines determined by the Conselho Nacional de Meio Ambiente - CONAMA. For this purpose hydrated lime is used, which is, in fact, produced from lime at the power plant. Hydrated lime is injected into the equipment called desulphuriser that operates capturing the sulfur dioxide from the boiler flue gas. Due to the importance of this process, the present work aimed to evaluate several points that involve: the production of hydrated lime from lime, the analysis of the quality of lime received, the study of the hydration process. Moreover it was evaluated the impact of the temperature of reaction through to the hydration efficiency according to the methodology and routine proposed. In addition, complementary analysis were carried out on the characterization of lime and hydrated lime and the correlation between the main process parameters measured and recorded in lime hydration control system. In relation to the results of hydration efficiency, it was possible to observe its increase when the maximum temperature of the reaction stage was lower, reaching results up to 85%.

scholarly journals The Effect of the Carbon Tax Value on the Optimal Parameters and Characteristics of Coal Power Plants

2020 ◽  
Vol 24 (3) ◽  
pp. 104-111
Author(s):  
Alexander Kler ◽  
Pavel Zharkov ◽  
Yulia Potanina ◽  
Andrey Marinchenko ◽  
Nikolai Epishkin
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Carbon Tax ◽  
Environmental Indicators ◽  
Steam Boiler ◽  
Optimal Parameters ◽  
Specific Investment ◽  
Investment Optimization ◽  
Coal Power Plants ◽  
Coal Power

AbstractThe paper investigates the effect of the carbon tax on the optimal parameters and indicators of two coal power plants: a steam turbine power unit with coal dust burning in a steam boiler and an internal gasification combined cycle power plant. Sufficiently detailed mathematical models have been developed for the considered plants that are focused on calculating the flow rates of working fluids and coolants and thermodynamic parameters at all points of the flowcharts, as well as the structural characteristics of the plant elements. The problems of optimizing the parameters of these plants related to the problems of nonlinear mathematical programming are formulated. As an efficiency criterion, the price of electricity is used at given value of the internal rate of return on investment. Optimization calculations were carried out with a carbon tax in the range from 0 $/t to 140 $/t in increments of 20 $/t. It is shown that with an increase in the charge for emissions, the optimal efficiency of the plants increases, as well as the specific investment. Specific CO2 emissions are reduced. Throughout the entire range of carbon tax values, IGCC power plant has the best economic and environmental indicators.

scholarly journals Coal to Biomass Conversion as a Path to Sustainability: A Hypothetical Scenario at Pego Power Plant (Abrantes, Portugal)

Resources ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 84
Author(s):  
Margarida Casau ◽  
Diana C. M. Cancela ◽  
João C. O. Matias ◽  
Marta Ferreira Dias ◽  
Leonel J. R. Nunes
Keyword(s):  
Power Plant ◽  
Energy Production ◽  
Power Plants ◽  
Fossil Fuels ◽  
Social Impact ◽  
Biomass Conversion ◽  
Hypothetical Scenario ◽  
Coal Power Plants ◽  
Low Levels

Energy consumption is associated with economic growth, but it comes with a toll regarding the environment. Renewable energies can be considered substitutes for fossil fuels and may contribute to reducing the environmental degradation that the world is presently facing. With this research, we aimed to offer a broader view of the state-of-the-art in this field, particularly regarding coal and biomass. The main objective is to present a viable and sustainable solution for the coal power plants still in operation, using as a hypothetical example the Pego Power Plant, the last operating coal fueled power plant in Portugal. After the characterization of land use and energy production in Portugal, and more particularly in the Médio Tejo region, where the power plant is located, the availability of biomass was assessed and it was concluded that the volume of biomass needed to keep the Pego power plant working exclusively with biomass is much lower than the yearly growth volume of biomass in the region, which means that this transition would be viable in a sustainable way. This path is aligned with policies to fight climate change, since the use of biomass for energy is characterized by low levels of GHGs emissions when compared to coal. The risk of rural fires would be reduced, and the economic and social impact for this region would be positive.

scholarly journals Evaluation of the Administrative Phase-Out of Coal Power Plants on the Italian Electricity Market

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4596
Author(s):  
Michele Fiorelli ◽  
Dogan Keles ◽  
Francesco Montana ◽  
Giovanni Lorenzo Restifo ◽  
Eleonora Riva Sanseverino ◽  
...  
Keyword(s):  
Electricity Market ◽  
Power Plants ◽  
Small Variation ◽  
Electricity Price ◽  
Spot Price ◽  
Price Variation ◽  
Coal Power Plants ◽  
Coal Power ◽  
Phase Out ◽  
The Impact

Although decarbonisation is one of the most important macro-trends of this century, electricity generation from coal power plants is still broadly common. The main goal of this study is to evaluate the impact of a premature coal power plants phase-out on the Italian day-ahead electricity market. For this purpose, two electricity price forecasts, related to different scenarios between 2019 and 2030, and two different hypotheses for the creation of electricity spot price, were compared. The results from the different scenarios show that coal power plants phase-out determines a small variation in electricity price when bid-up is not considered; instead, when operators’ bid-up is included in the study, the price variation becomes relevant.

The Impact of Electricity Market and Environmental Regulation on Carbon Capture & Storage (CCS) Development in China

2011 ◽  
pp. 463-471
Author(s):  
Zhao Ang
Keyword(s):  
Environmental Regulation ◽  
Electricity Market ◽  
Carbon Capture ◽  
Power Plants ◽  
Carbon Price ◽  
Intellectual Property Right ◽  
Chinese Government ◽  
Coal Power Plants ◽  
Coal Power ◽  
The Impact

Carbon Capture & Storage (CCS) has been regarded as a significant mitigation strategy to tackle global warming although the uncertainties of carbon price and CCS technology exist. Given that China is the biggest coal consumer and around four fifths of its electricity comes from coal power plants, many think CCS has to plays a central role in cutting the carbon emission of China’s coal power fleet. Most existing researches on CCS development in China emphasize the importance of sufficient funding, technological access, and market readiness, but put little light on the role of environmental regulation and electricity market establishment. This chapter examines the impact of Chinese electricity market establishment and environmental regulatory institution on CCS. This chapter argues that Chinese government should protect Intellectual Property Right (IPR), liberalize electricity market, and enforce environmental regulation in order to harvest CCS benefits successfully.

scholarly journals Residents’ Cognition and Behavior Related to Eco-Environmental Risks from the Development of Large Coal Power Plants: A Case Study in Xilinhot, Inner Mongolia

2021 ◽  
Vol 13 (14) ◽  
pp. 7813
Author(s):  
Yan Ma ◽  
Yan Ma ◽  
Zhiguo Cao ◽  
Shuyi Li ◽  
Bowen Lv ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Field Research ◽  
Environmental Risks ◽  
Adaptive Behaviors ◽  
Coal Power Plant ◽  
Coal Power Plants ◽  
Coal Power ◽  
Questionnaire Surveys ◽  
And Behavior

The development of large coal power plants is often accompanied by environmental pollution, thereby influencing the lives of the surrounding residents, resulting in a “not-in-my-backyard” effect and associated social injustice. To mitigate these influences, we conducted field research and questionnaire surveys with individuals living in areas around the Xilinhot coal power plant to explore their cognitive and behavioral psychological changes in response to the environmental risks of the coal power plant and the factors influencing such changes. A “cognition-perception-behavior” model was constructed for residents coping with the ecological environment influenced by the development of the coal power plant. Cognition of eco-environmental risks had a significant effect on the perception of eco-environmental risks which, in turn, significantly promoted the adoption of adaptive behaviors. Residents had a strong cognition and perception of eco-environmental risks but an extremely low likelihood of adopting relevant adaptive behaviors. Thus, affective responses can increase the residents’ cognition and perception of eco-environmental risks, and the communication of risk information can help them evaluate eco-environmental risks rationally.

scholarly journals Bottom Ash of the Largest Kuzbass Coal Power Plants: Secondary Use Possibility

2021 ◽  
Vol 315 ◽  
pp. 02012
Author(s):  
Aleksey Kargin ◽  
Nikolay Mashkin
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Building Materials ◽  
Activity Index ◽  
Bottom Ash ◽  
Raw Material ◽  
Coal Power Plant ◽  
Secondary Use ◽  
Coal Power Plants ◽  
Coal Power

Kemerovo district coal power plant, Tom-Usinskaya district coal power plant and Belovo district coal power plant are the largest coal power plants in Kuzbass and during the combustion of coal they generate annually about 1600 tons of coal ash which consists of fly ash and bottom ash. Almost all the generated ash is disposed into ash dumps except a small quantity of fly ash (3.5%) that is effectively utilized. Therefore, secondary use of the bottom ash can be a sustainable solution for reducing its by-products and overcoming the scarcity of raw materials required for construction work. Therefore, the main aim of this research was to determine the chemical composition and granulometric properties of bottom ash to find out the possibility of using it as raw material for the building materials production. A series of laboratory experiments were conducted to determine basicity index, activity index, average grain density, bulk density, true density and grain size distribution. The experimental results reveal that the particle size of ash is predominantly sand-sized while containing some silt-sized and rubble-sized fractions as well. The studied bottom ash has a low basicity and activity index, respectively, does not have independent hydraulic activity. Thus, bottom ash of the largest Kuzbass coal power plants can be used as raw material for the building materials production.

scholarly journals A study on carbon cap and trade effect to cost of electricity in accordance with the Merit Order of 300-400 MW coal power plants

2021 ◽  
Vol 880 (1) ◽  
pp. 012049
Author(s):  
A S Putra ◽  
I Garniwa ◽  
E S Arilanggaaji ◽  
S S Pradana
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Ghg Emissions ◽  
National Development ◽  
Carbon Price ◽  
Cap And Trade ◽  
Trade Effect ◽  
Cost Of Electricity ◽  
Coal Power Plants ◽  
Coal Power

Abstract Electricity is the basis of national development in a country. Power plants in Indonesia produces up to 283.8 TWh and are dominated by coal power plants which increase the amount of the greenhouse gases (GHG). In order to prevent more environmental problems, Indonesia ratified Paris Agreement by publishing the roadmap of Nationally Determined Contribution (NDC) that committed in reducing 29% of GHG emissions in 2030, which 11% of them are from the energy sector contributions. This research focuses on the implementation of the carbon cap and trade (CAT) between coal power plants having 300-400 MW capacity, which can affect their cost of electricity (Rp/kWh). It is well known that cap and trade (CAT) is a method used for reducing the mitigation cost of emission reduction in an effective way. From this research, it is found that the highest rise of incremental cost belongs to the 300 MW power plant in scenario 9 and the increase is from Rp.431.00/kWh to Rp.462.77/kWh, or approximately 7.37%. This research also shows that the most optimal carbon price is in the range of Rp. 130,165 to Rp.130,183 because the rank of the 330 MW and 400 MW power plant in merit order changes over in this condition. In the future, this research can be used as a comparison with the higher coal power plant capacity, so that an alternative way is obtained to determine the more optimal merit order.

scholarly journals Quantifying coal power plant responses to tighter SO2 emissions standards in China

2018 ◽  
Vol 115 (27) ◽  
pp. 7004-7009 ◽  
Author(s):  
Valerie J. Karplus ◽  
Shuang Zhang ◽  
Douglas Almond
Keyword(s):  
Power Plants ◽  
Data Sources ◽  
Monitoring Systems ◽  
Plant Responses ◽  
So2 Emissions ◽  
Air Quality Improvement ◽  
Coal Power Plants ◽  
Coal Power ◽  
The Impact

We evaluate the impact of China’s new air pollution standards on sulfur dioxide (SO2) emissions by comparing newly available data from Continuous Emissions Monitoring Systems (CEMS) at coal power plants with satellite measures. First, we show that following the July 2014 deadline for implementing tighter emissions standards, stack concentrations of SO2 reported by CEMS declined by 13.9%. Second, on average the ratios of the declines of SO2 measures in the satellite data and the CEMS data are about 0.5. However, the degree of correspondence between the two data sources varies by policy stringency, with weak correspondence found in key regions facing the toughest new limits. Third, large plants achieved compliance earlier than small (typically) power and heat cogeneration plants. To achieve continued air quality improvement, our results suggest a need for increased scrutiny of emissions data quality and monitoring practices and clear long-term targets.

scholarly journals Applying the life cycle assessment method to an analysis of the environmental impact of heat generation

2013 ◽  
Vol 18 (4) ◽  
pp. 1275-1281 ◽  
Author(s):  
M. Dzikuć
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Power Plant ◽  
Environmental Impact ◽  
Heat Generation ◽  
Power Plants ◽  
Assessment Method ◽  
Coal Power Plants ◽  
The Difference ◽  
The Impact

Abstract The paper presents a method of Life Cycle Assessment (LCA) to determine the impact of the heat produced on the environment. In addition, the usefulness of this method to assess the energy sector has been shown. This paper presents the impact of heat generation on the environment in coal power plants. A detailed analysis by the method of LCA is made to compare the environmental impact of heat generation in the Legnica Power Plant and Polkowice Power Plant. It is pointed to the difference in the results obtained. Moreover, the causes of the reported environmental impacts are discussed. Measures are identified which will help to reduce in the future the impact of the electricity produced on the environment during the production of heat.

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