Based on pH-stat method

dissolution characteristic of limestone for limestone-gypsum wet flue gas desulfurization in presence of citric acid was investigated.Furthermore

influence of factors such as pH value

stirring rate

reaction temperature and the concentration of citric acid on dissolution rate of limestone was analyzed.Results show that

the dissolution rate of limestone is always controlled by mass transfer

whether the citric acid exists or not;it increases with increasing stirring rate and reaction temperature;while when the pH value is equal to or higher than 5

the citric acid will inhibit the dissolution process of limestone due to the formation of calcium citrate

and the inhibition effect is more obvious at higher pH value.