COAL POWER Direct

MIT researchers push for faster commercialization of carbon capture technologies for coal-fired power plants by reducing system costs.

By J. Wayne Leonard
A policy of allocating free allowances to hold down electric price increases, as some in our industry are advocating as part of climate change legislation, is well-intended but not the best choice for a cap-and-trade plan. An "auction and recycle" plan accomplishes the same goals yet is more consumer friendly.

By Dr. Richard W. Goodwin, PE
Of the 131 million tons of U.S. power plant waste or coal combustion by-products (CCBs), 36% are disposed of in landfills and 21% are disposed of in surface impoundments. Recent problems with surface impoundments and landfills have created a media furor and have prompted elected and appointed officials to demand more stringent regulatory control.

The annual meeting of the Powder River Basin Coal Users’ Group was held in association with the ELECTRIC POWER conference in early May in Chicago. Get a taste of the festivities, technical meetings, and the announcement of the group’s 2009 Large and Small Plant of the Year winners in this conference report.

Utilities generally support a cap-and-trade approach to reducing carbon emissions—but only when the objective of any legislation is to promote cost-effective reductions. The least-cost alternative for consumers requires free distribution of all carbon allowances.

FirstEnergy has announced plans to repower two coal-fired units at the R.E. Burger plant to burn biomass. Conversion of the two units, expected to be completed by 2012, gets the utility off the hot seat with the EPA for alleged Clean Air Act violations.

Recent improvements in the performance of steam power plants have been achieved with advanced computerized controls. These new control schemes not only reduce fuel consumption and make the plant much more responsive, but they also can significantly decrease start-up commissioning time and cost.

Commonly, 20% of the cement (by weight) in a concrete mix is replaced by fly ash. Fly ash enhances the workability, durability, and ultimate strength of concrete at a lower cost than cement. However, mercury sorbents can change the ash properties to make it unsuitable as a concrete additive. New “concrete-friendly” sorbents can keep the revenues from ash sales flowing.

Measuring combustion airflow in a coal-fired power plant can be problematic when using annubar instruments that feature small holes that can easily plug with coal dust. Sierra Instruments eliminates this big maintenance headache with its more-accurate, nonplugging thermal mass flow meter design.

Demonstrating sound knowledge, having profound passion, and being consistent with your message are essential when trying to persuade someone to adopt your point of view. A recent press briefing hosted by a well-known pro-coal industry group failed on all counts.