Advanced flue gas treatment system using LILAC absorbent prepared from flyash

Publisher Summary The new Flue Gas Desulfurization (FGD) process called “LILAC” process is developed jointly by Hokkaido Electric Power Co., Inc. and Mitsubishi Heavy Industries Ltd. The system is characterized by the use of a highly active absorbent, which is prepared from lime, gypsum, and fly ash by aging in hot water. The results of demonstration test for semi-dry LILAC process are described in the chapter. The features of the different types of FGD system are compared in terms of desulfurization efficiency, utilities, and construction space and costs. The LILAC FGD system is applicable to the various types of flue gas treatment for its flexibility in the preparation of different forms of the absorbent. This system is capable of achieving high desulfurization efficiency without waste-water treatment, which is usually required in a wet type FGD system, such as the limestone/gypsum method. LILAC system makes large contribution toward the settlement of global air-pollution problems.