Archive: Coal


Polish Plant Beats the Odds to Become Model EU Generator

Once a Soviet satellite, Poland is now transforming into a thoroughly modern nation. To support its growing economy, this recent European Union member country is modernizing its power industry. Exemplifying the advances in the Polish electricity generation market is the 460-MW Patnów II Power Plant — the largest, most efficient (supercritical cycle), and environmentally cleanest lignite-fired unit in the country.


TVA Containment Pond Bursts, Causing Massive Coal Ash Flood

Just after midnight on Dec. 22, 2008, a 40-acre pond holding coal combustion waste for a Tennessee Valley Authority (TVA) steam power plant ruptured, sending a wave of wet ash across 300 acres of rural land in Harriman County, Tenn. It was the largest coal slurry spill in U.S. history — more than three times the size of the Martin Country, Ky., sludge spill of 2000, and about eight times that of the 1972 Buffalo Creek flood in West Virginia. Unlike that flood, which killed 125 people and injured scores others, this one, Tennessee authorities reported, resulted in no serious injuries or hospitalizations.


Sri Lanka Commissions Major Thermal Power Plant

The Sri Lankan government in December commissioned the first phase of the 300-MW Kerawalapitiya Thermal Power Plant, the nation’s biggest combined-cycle power plant project. The $300 million plant in the western part of the country commenced operations by generating 200 MW (Figure 7). In its second phase, it will expand to 300 MW. Per government estimates, power produced by the plant is priced at about 20 rupees or $0.18/kWh.


Custom FRP Trench Drains Speed Up FGD System Installation

The flue gas desulfurization process requires the use of aggressive liquids that significantly shorten the life of typical construction materials such as metals and concrete. That makes fiberglass-reinforced plastic (FRP) the material of choice for many components in a typical flue gas desulfurization (FGD) system.


A New Instrument for In Situ SCR NOx Measurement

A zirconium oxide sensor technology originally developed for automotive applications could make in situ, simultaneous measurement of O2 and NOx a breeze for coal-fired power plants.


Designing New Composite Stack Liners

The 200-MW Dallman Unit 4 under construction in Springfield, Ill., is expected to cost approximately 20% less to operate per megawatt-hour than the most efficient of the three existing Dallman units. A composite stack liner is one element enabling that cost savings.


CO2 Source and Sink Tracking Improving

Many opponents of climate change policies and regulations argue that it is unfair to penalize some sectors — like power generation — more heavily than others when it’s difficult to prove precisely where specific greenhouse gas (GHG) emissions are coming from, where they’re going, and what effect they are having. Toward the ends of scientific understanding and sound public policy, scientists are making progress in isolating GHG sources and sinks.