The company says that this step will ensure greater storage capacity as logistic support for positive developments overseas and help underpin security of supply for customers. With the rented volume of some 900t, the maximum storage capacity for the HOK activated lignite produced by RWE Power AG rises to a total of 10,000t.
The tower silo system is located on the business premises of Talke, a logistics firm, in Hurth and comprises ten individual silos in all with a capacity of 150 or 200 m3 each. Four different activated carbon types are stored there, with grain sizes extending from granules to super-milled HOK Super.
This rotary hearth furnace coke derived from lignite, which is used in the capture of pollutants and is marketed worldwide by RBB under the brand name "Activated Lignite HOK(R)", has special properties that yield an adsorbent and catalyst which is in demand in numerous environmental fields.
Typical applications include waste water and drinking water treatment, waste-gas and waste-air cleaning in refuse incineration and in the steel industry, where HOK is deployed globally as low-cost and highly effective sorbent.
Even in the US, the activated carbon from Rhenish lignite is now helping lower air pollution levels. Besides sulphur dioxide and nitrogen oxides, mercury poses a special challenge for US power plants. Here, too, "Activated Lignite HOK(R)" has proved to be both an outstandingly effective and a low-cost adsorbent.
With an annual capacity of 200,000t, RWE AG is the world's largest producer of activated lignite.