Oxy-fuel combustion for power generation and carbon dioxide by L Zheng

By L Zheng

Oxy-fuel combustion is presently thought of to be one of many significant applied sciences for carbon dioxide (CO2) trap in strength crops. the benefits of utilizing oxygen (O2) rather than air for combustion contain a CO2-enriched flue fuel that's prepared for sequestration following purification and coffee NOx emissions. This publication severely stories the basic rules, tactics and expertise of oxy-fuel combustion, together with complex techniques for its implementation.

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By L Zheng

Oxy-fuel combustion is presently thought of to be one of many significant applied sciences for carbon dioxide (CO2) trap in strength crops. the benefits of utilizing oxygen (O2) rather than air for combustion contain a CO2-enriched flue fuel that's prepared for sequestration following purification and coffee NOx emissions. This publication severely stories the basic rules, tactics and expertise of oxy-fuel combustion, together with complex techniques for its implementation.

Show description

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In a conventional air-blown plant, the load change requirement can be easily met with changes in fuel feed and combustion air flow rates. In an oxy-fuel plant, there is a need for several pieces of equipment to operate in unison to allow smooth load changes. All load changes will require corresponding changes in fuel feed rates. In an oxy-fuel power plant, the changes in fuel feed rate will have to be matched with changes of flow rates for both oxygen and recycled flue gas, balanced with the ASU and flue gas compressor.

It is likely that multiple trains will be required for a commercial oxy-coal power plant. 5% purity commonly produced for industrial gas applications. Purity of 97% can be achieved in a cryogenic ASU without the costly oxygen–argon separation. 3 psig). Industrial oxygen is generally delivered at higher pressure. ) • The ASU plant will likely need sufficient operating flexibility to respond to load-following dispatch at least as fast as can the steam generator island. This requirement is not commonly imposed on industrial oxygen plants.

Key words: oxy-coal comparative economics, oxy-coal capital cost, oxy-coal cost of electricity, oxy-CO 2 purity, CO 2 avoided cost. 1 Introduction Three options for capturing CO 2 from coal-based power generation plants are under investigation: oxy-coal technology, air-fired combustion with post-combustion CO 2 capture, and gasification/combined cycle power plants with pre-combustion CO 2 capture. The decision to deploy one of these technologies in preference to the others will largely be made on a comparative cost basis, usually the levelized cost of electricity (COE).

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