Evergreen Energy produces K-Fuel®, a cleaner, more efficient refined coal, using a patented pre-combustion refining process. With abundant low-grade coal as a raw material, the K-Fuel® process employs heat and pressure to transform the coal into a cleaner, more efficient fuel by removing water and polluting impurities, thus increasing combustion efficiency.

When applied to different lower-rank sub-bituminous and lignite coals, the K-Fuel process removes, on average, almost 70 percent of the coal's elemental mercury. That is mercury that will not go into the atmosphere when the coal is burned. Across that same range of coals, the K-Fuel process raised Btu levels by almost 30 percent and removed, on average, 61 percent of the coal's moisture. (see chart below)

K-Fuel® can provide a lower-cost alternative to installing expensive, space consuming post-combustion pollution control systems or make plants with existing emissions control systems operate more efficiently and cleaner.

Process treatments reduce dust and K-Fuel® can be handled, transported and stored using the same equipment and methods as raw coal.

K-Fuel® can be blended with other coals to meet customer-specific needs. Fly ash characteristics depend on the original feedstock coal, but because a significant amount of mercury is removed before K-Fuel® is burned, the resulting fly ash has a lower mercury content when compared to raw coals, making it especially appealing to cement manufacturers..