Abstract
The kinetic performance of a novel amine solvent blend BEA-AMP was compared with MEA and blended MEA-MDEA in the presence and absence of a solid acid catalyst (HZSM-5) in the desorber column of a bench-scale pilot plant. In addition, a total of seven solid base catalysts were screened using a semibatch reactor to select the one that is most suitable as catalyst for amine-based CO2 absorption. The selected solid base catalyst, K/MgO, was placed in the absorber of the pilot plant. Overall, three absorber-desorber catalytic scenarios were evaluated: blank–blank, blank-HZSM-5, and K/MgO-HZSM-5. For the blank–blank and blank-HZSM-5 scenarios, the novel solvent (4 M BEA-AMP) outperformed 5 M MEA and 7 M MEA-MDEA blend despite BEA-AMP having the lowest molarity. The rates of absorption and desorption for the blank–blank (noncatalytic) scenario for BEA-AMP were 14.8 and 38.4 mol/m3 min, respectively. For the blank-HZSM-5 system, the rates were 18.1 and 45.6 mol/m3 min, respectively. Absorption and desorption rate...
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