Dear Ahmed,

Aspen Plus simulation tool is used for the development of the carbon capture model for three different removal efficiencies, 85%, 90% and 95%. Flue gas data related to the cement industry as well as process development parameters .the cement industry is a typical high energy consumption and heavy pollution industry, in which amounts of CO2, NO, NO2, and SO2 discharge from the pre-calciner kiln system and cause severe greenhouse and acid rain effects. Meanwhile, reasonable division of the combustion environment in the calciner is the main method to control the formation of pollutant gases. a calciner process model in Aspen Plus is proposed based on the combustion mechanism analysis of the Dual Combustion and Denitration calciner (DD-calciner) and verified by industrial data. Then, for a concrete DD-calciner, the article studies the effects of the flow rate of coal and tertiary air on flue gas compositions and effects of the staging combustion technology on the NO x , SO2, and CO concentrations in the flue gas. Through comparing the model results with the relevant environmental standards, the optimization analysis for staging combustion parameters of the calciner is done, and the result shows that when the proportion of tertiary air entering the pyrolysis and combustion zone is controlled within the range of 57–65.52% (0.89