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- W3043908482 abstract "Activators such as piperazine (PZ) are widely used to increase the CO2 absorption rate of aqueous methyldiethanolamine (MDEA) solutions by accelerating reaction. However, a big difference (1 to 2 orders of magnitude) in the enhancement of absorption rate with the addition of PZ was obtained in different studies. In this work, it was proved that mass transfer is the rate-limiting step in the above process and in most cases enhancing mass transfer is quite essential. Some low-polar solvents were screened as “mass transfer promoters (MTPs)” to enhance mass transfer by inducing interfacial turbulence, which markedly improved the CO2 absorption performance of MDEA solutions. The individual addition of PZ and MTPs to the MDEA solution, which correspond to the reaction enhancement and the mass transfer enhancement, increased the absorption rate by 131% and 33%–319%, respectively. The co-effects of enhancing both reaction and mass transfer (in the presence of activators and MTPs) can lead to 2 to 10-fold increase in the absorption rate. Furthermore, MTPs could increase the CO2 cyclic loading and desorption rate by 27% and 100%, respectively, indicating that the MDEA/MTPs had significant advantages for reducing the energy consumption in CO2 capture applications." @default.
- W3043908482 created "2020-07-29" @default.
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- W3043908482 date "2020-12-01" @default.
- W3043908482 modified "2023-09-27" @default.
- W3043908482 title "Enhanced research of absorption by mass transfer promoters" @default.
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- W3043908482 doi "https://doi.org/10.1016/j.seppur.2020.117465" @default.
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