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Questions and Answers
What is the first law thermodynamic efficiency of the power plant that operates using bituminous coal?
What is the first law thermodynamic efficiency of the power plant that operates using bituminous coal?
- 50%
- 65%
- 36% (correct)
- 48%
How much SO2 is produced from burning 1×10^9 kg of coal annually?
How much SO2 is produced from burning 1×10^9 kg of coal annually?
- 1.5×10^7 kg
- 2.0×10^7 kg
- 4.0×10^7 kg
- 3.0×10^7 kg (correct)
What percentage of the coal composition is carbon in the provided proximate and ultimate analysis?
What percentage of the coal composition is carbon in the provided proximate and ultimate analysis?
- 8.7%
- 67.0% (correct)
- 5%
- 1.5%
If the power plant operates at a capacity of 65%, how does this affect the annual coal consumption assuming it operates at rated capacity?
If the power plant operates at a capacity of 65%, how does this affect the annual coal consumption assuming it operates at rated capacity?
What is the chemical relationship between sulfur and SO2 production as stated in the content?
What is the chemical relationship between sulfur and SO2 production as stated in the content?
What is the higher heating value (HHV) of the given butuminous coal in kJ/kg?
What is the higher heating value (HHV) of the given butuminous coal in kJ/kg?
What percentage of the coal's composition is represented by hydrogen?
What percentage of the coal's composition is represented by hydrogen?
How much of the total coal-fired power capacity in the US is expected to be retired in the next 10 years?
How much of the total coal-fired power capacity in the US is expected to be retired in the next 10 years?
What is the molecular weight of sulfur used in the analysis of butuminous coal?
What is the molecular weight of sulfur used in the analysis of butuminous coal?
What portion of the total power generation in the US is comprised of coal power capacity?
What portion of the total power generation in the US is comprised of coal power capacity?
What is the carbon content range for anthracite coal?
What is the carbon content range for anthracite coal?
Which type of coal typically has the highest heating value?
Which type of coal typically has the highest heating value?
What is the sulfur content in bituminous coal typically?
What is the sulfur content in bituminous coal typically?
Which characteristic is indicative of coal grade?
Which characteristic is indicative of coal grade?
Which of the following types of coal has the lowest heating value?
Which of the following types of coal has the lowest heating value?
What common element is contained in all types of coal?
What common element is contained in all types of coal?
Which type of coal contains the least carbon content?
Which type of coal contains the least carbon content?
What does the 'daf' in ultimate analysis stand for?
What does the 'daf' in ultimate analysis stand for?
What is the heating value range of sub-bituminous coal?
What is the heating value range of sub-bituminous coal?
How does coal rank differ from coal grade?
How does coal rank differ from coal grade?
What are the two main categories of stationary power generation?
What are the two main categories of stationary power generation?
What percentage of energy is typically lost in the stationary power sector?
What percentage of energy is typically lost in the stationary power sector?
How does the energy production from natural gas compare to that from coal?
How does the energy production from natural gas compare to that from coal?
What aspect differentiates stationary power generation from transportation power needs?
What aspect differentiates stationary power generation from transportation power needs?
What has historically been the dominant energy carrier used for generating electric power?
What has historically been the dominant energy carrier used for generating electric power?
What is one of the primary reasons for the decline in the reliance on coal?
What is one of the primary reasons for the decline in the reliance on coal?
What can be inferred about the future of coal compared to alternative energy sources?
What can be inferred about the future of coal compared to alternative energy sources?
Which of the following statements is true about coal grades?
Which of the following statements is true about coal grades?
Study Notes
Stationary Power
- Stationary power has different needs than transportation
- Stationary power plants are categorized as large and centralized or small and distributed
Electricity Generation
- Coal is a historically dominant energy carrier for generating electric power
- Coal is being overtaken by Natural Gas for generating electric power
- There are large losses in the stationary power sector (around 70-80%)
Coal
- Coal is a complex hydrocarbon structure with trace species
- Coal classification is based on rank (heating value and carbon content)
- Coal is also classified by grade (based on ash content, sulfur content, etc.)
- Coal grade is independent of coal rank
- All types of coal contain sulfur and nitrogen
Comparing Coal:
- Coal has higher emissions than petroleum fuels
- Coal has lower energy content than petroleum fuels
Impact of Coal Use
- Burning bituminous coal for power generation can produce significant ash and sulfur emissions
- 1 kg of sulfur produces 2 kg of sulfur dioxide (SO2)
- 1 billion kg of coal can produce 30 million kg of SO2 annually
Coal Combustion
- Air is required for complete coal combustion
- Understanding the chemical composition of coal is essential for calculating air requirements
- The chemical composition and the global reaction of coal combustion is necessary for calculating emissions
The Future of Coal Power
- Coal power is expected to decline:
- 50% of US power plants are over 25 years old.
- 25% of coal fired capacity is expected to be retired in the next 10 years.
- Nuclear power is also expected to retire 40 GW or more in the next decade.
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Description
Test your knowledge on stationary power, its generation processes, and the role of coal in electricity production. This quiz covers topics such as coal classification, emissions, and the comparison between coal and petroleum fuels. Explore the complexities of the stationary power sector and the impact of coal use on the environment.
