Experimental Investigation and Molecular Simulation on Meoh-Dmc Azeotrope Adsorption on Al2o3

Sun, Xuping; Tan, Hao; Xie, Hongmei; Chen, Siyuan; Li, Ang; Wang, Jun; Huang, Chunxiang; Shao, Hui

doi:10.2139/ssrn.4105277

Cited by 1 publication

(2 citation statements)

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“…In addition, our earlier research indicates the adsorption capacities of pure Al 2 O 3 for MeOH and DMC are 325.52 mg g À 1 and 70.32 mg g À 1 , separately, with the selectivity S equals to 4.63. [15] By loading onto clay supports, Al 2 O 3 /HPal composite has higher adsorption separation ability towards MeOH-DMC azeotrope than pure Al 2 O 3 .…”

Section: Adsorption Separation Performancementioning

confidence: 96%

“…Based on our previous research on separation of MeOH-DMC by adsorption, Al 2 O 3 has demonstrated reasonable separation performance towards this azeotrope. [15] Pal with large surface area can act as an effective support as well as adsorbent. Thus, Al 2 O 3 loaded with Pal has been synthesized to enhance the separation ability towards MeOH-DMC.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Aluminium Oxide/Acid‐Treated Palygorskite by Response Surface Methodology and its Application in Adsorptive Separation of the Methanol‐Dimethyl Carbonate Azeotrope

et al. 2023

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A low-cost composite adsorbent aluminium oxide/acid-treated palygorskite (Al 2 O 3 /HPal) was prepared by the total incipient wetness method and succesfully applied for the separation of methanol-dimethyl carbonate (MeOH-DMC) azeotrope for the first time. Major synthetic factors influencing the final separation performance were explored by the response surface methodology (RSM) based on Box-Behnken design (BBD). Adsorbents under optimized synthesis conditions were characterized by XRD, FT-IR, SEM, TEM and BET analysis. Adsorptive separation performance of Al 2 O 3 /HPal were investigated by both static and dynamic experiments. The adsorption capacities for MeOH and DMC were 335.52 mg g À 1 and 23.92 mg g À 1 , respectively, while the selectivity S and the separation factor α towards MeOH equaled to 14.03 and 6.1. Kinetic curves fitted the pseudo-second-order model. Isotherm study results indicated two different adsorption behaviors for this azeotrope where heterogeneous multi-layer adsorption was observed for DMC but monolayer adsorption occurred for MeOH with surface inhomogeneity. Moreover, thermodynamic study suggested that the driving force of the MeOH-DMC system on Al 2 O 3 /HPal included both enthalpy and entropy effects.

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Section: Adsorption Separation Performancementioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%