This work presented
experimental and modeling studies on the simultaneous
absorption of H2S and CO2 into the N-methyldiethanolamine (MDEA) and piperazine (PZ) solution in a rotating
packed bed (RPB). The effect of different operating conditions, including
MDEA concentration (C
MDEA), PZ concentration
(C
PZ), liquid volumetric flow rate (L), temperature (T), and high gravity factor
(β) on the absorption efficiencies of H2S and CO2 (ηH2S and ηCO2
) were investigated. The results showed that ηH2S and ηCO2
were significantly
affected by C
MDEA, C
PZ, L, and β. ηH2S and ηCO2
could reach 99.98 and
96.51%, respectively. Furthermore, an artificial neural network (ANN)
model was established to predict ηH2S,
ηCO2
, and mass-transfer coefficient (K
G
a). Results showed that the
predicted values were in good agreement with the experimental values
(within deviations of ±10% for H2S and CO2). This work provides a potential technology of simultaneous absorption
of H2S and CO2 for the biogas upgrade.