Stationary Power and Coal Use Quiz
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Stationary Power and Coal Use Quiz

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Questions and Answers

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?

  • 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?

  • 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?

    <p>Coal consumption decreases by 35%</p> Signup and view all the answers

    What is the chemical relationship between sulfur and SO2 production as stated in the content?

    <p>1 mol S produces 1 mol SO2</p> Signup and view all the answers

    What is the higher heating value (HHV) of the given butuminous coal in kJ/kg?

    <p>28,400</p> Signup and view all the answers

    What percentage of the coal's composition is represented by hydrogen?

    <p>42%</p> Signup and view all the answers

    How much of the total coal-fired power capacity in the US is expected to be retired in the next 10 years?

    <p>50 GW</p> Signup and view all the answers

    What is the molecular weight of sulfur used in the analysis of butuminous coal?

    <p>32 g/mol</p> Signup and view all the answers

    What portion of the total power generation in the US is comprised of coal power capacity?

    <p>50%</p> Signup and view all the answers

    What is the carbon content range for anthracite coal?

    <p>86-98%</p> Signup and view all the answers

    Which type of coal typically has the highest heating value?

    <p>Anthracite</p> Signup and view all the answers

    What is the sulfur content in bituminous coal typically?

    <p>2%</p> Signup and view all the answers

    Which characteristic is indicative of coal grade?

    <p>Ash content</p> Signup and view all the answers

    Which of the following types of coal has the lowest heating value?

    <p>Lignite</p> Signup and view all the answers

    What common element is contained in all types of coal?

    <p>Sulfur</p> Signup and view all the answers

    Which type of coal contains the least carbon content?

    <p>Lignite</p> Signup and view all the answers

    What does the 'daf' in ultimate analysis stand for?

    <p>Dry ash-free</p> Signup and view all the answers

    What is the heating value range of sub-bituminous coal?

    <p>8,300-11,500 Btu/lb</p> Signup and view all the answers

    How does coal rank differ from coal grade?

    <p>Rank is based on carbon content.</p> Signup and view all the answers

    What are the two main categories of stationary power generation?

    <p>Large and centralized, Small and distributed</p> Signup and view all the answers

    What percentage of energy is typically lost in the stationary power sector?

    <p>70-80%</p> Signup and view all the answers

    How does the energy production from natural gas compare to that from coal?

    <p>Natural gas has already exceeded coal in energy production</p> Signup and view all the answers

    What aspect differentiates stationary power generation from transportation power needs?

    <p>Specific infrastructure requirements</p> Signup and view all the answers

    What has historically been the dominant energy carrier used for generating electric power?

    <p>Coal</p> Signup and view all the answers

    What is one of the primary reasons for the decline in the reliance on coal?

    <p>Greater availability of solar jobs</p> Signup and view all the answers

    What can be inferred about the future of coal compared to alternative energy sources?

    <p>Coal is likely to be replaced by cleaner energy sources</p> Signup and view all the answers

    Which of the following statements is true about coal grades?

    <p>Coal grades determine its emissions when burned</p> Signup and view all the answers

    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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    Related Documents

    Lecture 9 - Coal And Stationary Power PDF

    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.

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