Monday, October 7, 2013

Japan’s Isogo Power Plant Burnishes Clean Coal’s Credentials

Japan’s Isogo Power Plant Burnishes Clean Coal’s Credentials
Because it runs hotter, Isogo’s ultrasupercritical steam leads to efficiency and carbon reduction. [Carbon dioxide emission is] 802 kg/MWh on a net or transmission-line basis—still well above what the U.S. Environmental Protection Agency demands of new coal plants. To reduce air pollution, J-Power uses a two-stage combustion system and its own multipollutant control technology, which employs activated coke to absorb nitrogen oxides, sulfur oxides, and mercury pollutants from flue gases. Meanwhile, electrostatic precipitators remove soot and dust particles. “Consequently, SOx and NOx emissions are much lower than those of other countries’ coal-fired plants,” says Sasatsu, “almost at the same level of gas-fired plants.”

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