Please forward this error screen to cpanel8. This article needs additional citations for verification. Oxy-cO2 emissions from fuel combustion 2015 PDF combustion is the process of burning a fuel using pure oxygen instead of air as the primary oxidant. Since the nitrogen component of air is not heated, fuel consumption is reduced, and higher flame temperatures are possible.
In recognition of fundamental changes in the way governments approach energy related environmental issues, the IEA has prepared this publication on CO2 emissions from fuel combustion. This annual publication was first published in 1997 and has become an essential tool for analysts and policy makers in many international for a such as the Conference of the Parties, which will be meeting in Paris, France from 30 November to 11 December 2015. The data in this book are designed to assist in understanding the evolution of the emissions of CO2 from 1971 to 2013 for more than 140 countries and regions by sector and by fuel. Emissions were calculated using IEA energy databases and the default methods and emission factors from the 2006 IPCC Guidelines for National Greenhouse Gas Inventories.
Historically, the primary use of oxy-fuel combustion has been in welding and cutting of metals, especially steel, since oxy-fuel allows for higher flame temperatures than can be achieved with an air-fuel flame. There is currently research being done in firing fossil-fueled power plants with an oxygen-enriched gas mix instead of air. Firing with pure oxygen would result in too high a flame temperature, so the mixture is diluted by mixing with recycled flue gas, or staged combustion. The justification for using oxy-fuel is to produce a CO2 rich flue gas ready for sequestration.
Oxy-fuel combustion has significant advantages over traditional air-fired plants. Because the flue gas volume is reduced, less heat is lost in the flue gas. The flue gas is primarily CO2, suitable for sequestration. The concentration of pollutants in the flue gas is higher, making separation easier.
Heat of condensation can be captured and reused rather than lost in the flue gas. Because nitrogen from air is absent, nitrogen oxide production is greatly reduced. Economically speaking this method costs more than a traditional air-fired plant. The main problem has been separating oxygen from the air. At present in the absence of any need to reduce CO2 emissions, oxy-fuel is not competitive. However, oxy-fuel is a viable alternative to removing CO2 from the flue gas from a conventional air-fired fossil fuel plant.
However, an oxygen concentrator might be able to help, as it simply removes nitrogen. In industries other than power generation, oxy-fuel combustion can be competitive due to higher sensible heat availability. Oxy-fuel combustion is common in various aspects of metal production. The glass industry has been converting to oxy-fuel since the early 1990s because glass furnaces require a temperature of approximately 2800 degrees F, which is not attainable at adiabatic flame temperatures for air-fuel combustion unless heat is regenerated between the flue stream and the incoming air stream. Oxy-fuel combustion may also be cost effective in the incineration of low BTU value hazardous waste fuels. It is often combined with staged combustion for nitrogen oxide reduction, since pure oxygen can stabilize combustion characteristics of a flame. One case study of oxy-fuel combustion is the attempted White Rose plant in North Yorkshire, United Kingdom.
The planned project was an oxy-fuel power plant coupled with air separation to capture two million tons of carbon dioxide per year. The carbon dioxide would then be delivered by pipeline to be sequestered in a saline aquifer beneath the North Sea. Worldwide innovations in the development of carbon capture technologies and the utilization of CO2″. Oxy Fuel CO2 Carbon Capture and Sequestration Technology Method – Power Plant CCS ».
Global Carbon Capture and Storage Institute ». An official website of the United States government. We’ve made some changes to EPA. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot. Fossil fuel use is the primary source of CO2. CO2 can also be emitted from direct human-induced impacts on forestry and other land use, such as through deforestation, land clearing for agriculture, and degradation of soils. Agricultural activities, waste management, energy use, and biomass burning all contribute to CH4 emissions.