Grand Challenges in Emerging Separation Technologies

Shao, Lu

doi:10.3389/fenvc.2020.00003

Cited by 7 publications

(2 citation statements)

References 56 publications

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“…However, after decades of optimization and improvements, distillation processes remain the dominant separation technologies and account for more than

50 %

of overall separation energy consumed due to low energy efficiency 4,5 . Membrane‐based separation is an emerging and energy‐efficient technology but its industrial applications continue to be limited by low selectivity, low capacity, low stability, and elevated fouling tendency 4,6 . In contrast, adsorptive separation is relatively established, energy‐efficient, and heavily practiced in the air separation industry and others 7 …”

Section: Introductionmentioning

confidence: 99%

Generalization of thermodynamic Langmuir isotherm for mixed‐gas adsorption equilibria

et al. 2022

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This work presents a comprehensive thermodynamic model for both pure component isotherms and mixed‐gas adsorption equilibria. A generalization of thermodynamic Langmuir isotherm, the proposed model assumes competitive adsorption of multiple adsorbates on adsorbent surface for mixed‐gas adsorption equilibria, and it applies an area‐based adsorption nonrandom two‐liquid activity coefficient model in the activity coefficient calculations for the adsorbate phase. The resulting generalized Langmuir isotherm properly captures both surface loading dependence and adsorbate phase composition dependence for mixed‐gas adsorption equilibria. The model is validated with accurate representations of gas adsorption equilibrium data for varieties of unary, binary, and ternary gas systems. The model results are further compared with those calculated from extended Langmuir isotherm and Ideal Adsorbed Solution Theory.

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“…However, after decades of optimization and improvements, distillation processes remain the dominant separation technologies and account for more than

50 %

Section: Introductionmentioning

confidence: 99%

Generalization of thermodynamic Langmuir isotherm for mixed‐gas adsorption equilibria

et al. 2022

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“…The efficiency of these two processes depends on many factors, such as composition of the material, properties of removed/recovered metal ions, experimental conditions, such as temperature, pH, and process duration (Keskin et al, 2021;Zante et al, 2022). The interest in this area is steadily growing also due to the low energy consumption, small size of the polymeric material and the potential possibilities of using them on a larger scale (Shao, 2020). In processes based on utilization of polymeric materials, the proper selection of the carrier (the component that binds the metal ions) is critical.…”

Section: Introductionmentioning

confidence: 99%

Chemical and Process Engineering

2022

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In this article, we present the results of the first application of 2-benzoylpyridine (2-BP) as a carrier in adsorptive polymeric materials dedicated for the removal of Ag(I) and Cu(II) ions from model acidic solutions. In the first stage of the research, the classical solvent extraction, in which 2-BP was used as an extractant, allowed to determine the proper conditions for conducting adsorptive processes. The stability constants of 2-BP complexes with analyzed metal ions were determined using the spectrophotometric method. The electrospray ionization (ESI) high-resolution mass spectrometry (HRMS) method was applied for the confirmation of the ability of 2-BP molecules to form complexes with Cu 2+ metal ions in a solution and to determine the elemental composition of generated complexes (to identify the ratio of the number of metal ions to the number of molecules of 2-BP). The obtained results indicate that both the adsorptive processes and solvent extraction strongly depend on the properties of metal ions and that the use of 2-BP as a carrier/extractant allows for efficient removal of silver(I) ions and much less effective removal of copper(II) ions. The utilization of adsorptive polymeric materials is in line with the contemporary research trends that focus on eco-friendly and cost-effective methods.

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