COAL POWER Direct

Though former New York attorney general Eliot Spitzer may be remembered for one type of indecent exposure, the current New York attorney general is promoting a more damaging type of indecent exposure for coal-fired power plant owners.

No matter what its size, fine particulate matter is a serious matter for coal-burning power plants. A process that charges those particles shows promise for mitigating the problem.

The already razor-thin power supply margins in the UK are likely to become nearly transparent by 2012, according to a new study prepared by Fells Associates: “A Pragmatic Energy Policy for the UK” (PDF). The report notes that the UK’s electricity shortfall will blossom to between 30 GW and 35 GW by 2027, and residents should expect periods when demand exceeds supply in just three years. If you think the UK government is worried, think again.

Just when you thought coal was down for the count, here’s a report from London’s Financial Times. “British coal production looks set to grow for the first time since 2001, thanks to higher prices and power generators’ new-found appreciation of domestic coal supplies.” Coal production in the UK mostly has been falling since the 1950s.

By Dr. Robert Peltier, PE
The fallout from the Supreme Court’s April 2, 2007, decision (Massachusetts v. Duke Energy) in which the high court ruled that the EPA does have the right to regulate CO₂ emissions as a pollutant under the Clean Air Act (CAA) continues. The court also ruled that the EPA has the authority to regulate carbon emissions from automobiles and other vehicles—and, by extension, power plants (my words, not the court’s).

Selective catalytic reduction systems were introduced as a means of reducing the nitrogen oxide emissions of power generators in the 1980s. Since then, environmental issues have increased in importance, as has the value of an SCR reactor. Unfortunately, because this technology is still so new, not all users understand its full potential and proper maintenance techniques.

Emissions of SO₃ (or its hydrated form, H₂SO₄) have created a nagging problem for some coal-fired power generators after they’ve installed a selective catalytic reduction system. If your plant is in that unfortunate group, here’s a summary of  the state of our understanding of the problem—and its solutions.

Measuring the level of flyash in your silos is not an easy task, in part because the flyash collected at one plant can be remarkably different from that collected at another plant, even if both fire the same coal. Such variability means that selecting the right instrument for your application is important.

A federal appeals court has struck down a key Environmental Protection Agency (EPA) program for reducing fine particulate and smog-causing emissions in the eastern half of the nation, saying the rules were riddled with “several fatal flaws,” including the agency’s failure to properly focus pollution cuts to prevent movement of air pollution from one state from worsening air quality in a downwind state.

In a sobering assessment of a key technology that’s expected to help keep the coal industry viable in the face of likely greenhouse gas caps, several electric utility executives have expressed deep concern that the promise of carbon capture and storage for coal-fired power plants has been “overblown” and “oversold.”