Identification of pyroligneous ie reqction with calciumhydrodixe ???

Dear student 

The soluble calcium within pyroligneous acid is in the form of calcium acetate having a low decomposition temperature around 400 °C, far lower than that of raw limestone being about 700 °C.
Due to its solubility, calcium within pyroligneous acid was loaded readily on the coals, forming the ultrafine particles in the impregnated coal matrix. During coal combustion, the loaded calcium underwent quick decomposition prior to char combustion and subsequently, the formed ultrafine calcium oxide captured the evolved sulfur oxide. Around 85% desulfurization efficiency was achieved for coal combustion.