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Sensitivity analysis for independent variables (a) shows sensitivity of specific energy requirement to variations in temperature approaches of lean amine to flue gas, the L/R heat exchanger and the flue gas temperature. Abcissa is the temperature relative to the mid bound cf. Table 2. Panel (b) shows sensitivity to changes in regenerator pressure, L/G ratio and concentration of MEA solution. Corresponding abcissa bounds are given for each variable in the legend.