Highly efficient methyldiethanolamine (MDEA) removal and light naphtha purification<i>via</i>synergistic effect of molecular sieves and fixed adsorption bed

Zhang, Bin; Bai, Zhishan; Wang, Bingjie; Luo, Huiqing

doi:10.1039/c9ra00308h

Cited by 3 publications

(2 citation statements)

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“…However, solvent naphtha and MDEA are fully mixed in the lye tank during the desulfurization process. After MDEA absorbs H 2 S in the oil, the solvent naphtha comes out from the top of the tank by layering and separation treatment, entraining a small amount of MDEA drops, which causes the pH of the solvent naphtha to increase from around 6.8 to around 9.7 . This solvent naphtha is used to process gasoline.…”

Section: Introductionmentioning

confidence: 99%

“…Commonly, two-phase separation methods include adsorption, centrifugal separation, gravity sedimentation, membrane separation, and extraction . Zhang et al used a fixed adsorption bed system with a molecular sieve (13X) to remove MDEA from light naphtha and investigated the adsorption mechanism of 13X. Peng et al made a novel mesoporous material and conducted adsorption experiments at 298.15 K and found that this new material showed promise as a separation adsorbent.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Jet-Cyclone Coupled Separation Performance of Solvent Naphtha Containing MDEA

Ding

Xiao

Wang

et al. 2023

Ind. Eng. Chem. Res.

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The removal of methyldiethanolamine (MDEA) from solvent naphtha is crucial due to its impacts on pH and the refining process. In this study, the Fluent simulation method was used to study the internal flow field of a jet-cyclone separator to address the limitations of experimental research. The absorption capacity of water and ethylene glycol were compared by batch experiments as a jet-cyclone coupled separation method for MDEA. In addition, the effects of cyclone inlet flow rate, absorbing liquid temperature, absorbing liquid flow rate, and equipment structure on the separation efficiency of MDEA were investigated. The results showed that the comprehensive separation efficiency of MDEA ranged from 81.4 to 95.43%. This work is the first to use a jet-cyclone coupling separator to treat MDEA in solvent naphtha, expanding the gas–liquid mass transfer equipment field, with promising application prospects.

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Section: Introductionmentioning

confidence: 99%