A Nonrenewable Energy Type
Coal has two main energy applications, with about 90% used for electricity generation and 10% used for commercial and residential heating. In terms of electricity generation in the United States, coal is responsible for about 28%, a significant decrease from 53% twenty years earlier when it was the leading energy for producing electricity. There are two primary commercial methods for generating electricity from coal including pulverized coal combustion and fluidized bed coal combustion. To safely burn coal, sulfur, nitrogen, and heavy metals are removed at the electric plant. The sequestering of sulfur and nitrogen are important steps for limiting acid rain and ground level ozone. To generate electricity, the United States has about 360 coal plants with about 790 generators, of which greater than 90% use pulverized coal technology. Most coal is transported by rail.
Keywords: clean coal, pulverized coal, fluidized bed coal, integrated gasification combined cycle, IGCC, fly ash, bottom ash, flue gas desulfurization, nitrogen catalytic reduction, carbon dioxide production, carbon capture and sequestration
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