A New Method for Predicting the Adsorption Properties of Mn/Fe Binary Oxides for Arsenic and Selenium in Coal Flue Gas
Mn/Fe binary oxides have gained significant attention due to their excellent adsorption potential for arsenic and selenium in coal-fired flue gas.However,their adsorption performance is influenced by both the preparation process of the adsorbent and the adsorption process itself,and experimental testing is characterized by high costs and lengthy cycles.A new predictive model is established based on the physicochemical properties of the adsorbent and its adsorption capacity.This model compares the surface structure differences of adsorbents with different molar ratios and calculates various parameters such as the conversion rate and activation energy of arsenic and selenium at different temperatures.Subsequently,the respective impact magnitudes of these factors are incorporated into the mathematical model,allowing the model to predict the adsorption efficiency of the adsorbent under different conditions.The results of the model calculations indicate that the maximum adsorption capacity for arsenic and selenium is achieved when the Mn/Fe molar ratio is 1:1.The optimal adsorption temperatures for arsenic and selenium are 750 and 600℃,respectively.The adsorption flux coefficients of arsenic and selenium show an initial increase followed by a decrease with increasing temperature.The adsorption flux coefficients are positively correlated with the morphological structure of the adsorbent at different temperatures.A comparative analysis between predicted values and experimental values confirms the accuracy of this method.This research provides a novel approach beyond experimental means for identifying efficient heavy metal adsorbents.
coal flue gasadsorbentarsenicseleniumprediction model
万方数据
维普
