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Validation of two contrasting capturing mechanisms for gaseous formaldehyde between two different types of strong metal-organic framework adsorbents

Thi Yen Tran, Sherif A. Younis, Philippe Heynderickx (UGent) and Ki-Hyun Kim
(2022) JOURNAL OF HAZARDOUS MATERIALS. 424(Part B).
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Abstract
In this research, the adsorption behavior of formaldehyde (FA) onto two types of metal-organic frameworks (MOFs: MOF-199 [M199] and UiO-66-NH2 [U6N]) is investigated against changes in the key process variables (e.g., FA partial pressure (0.5-10 Pa), temperature (30-120 degrees C), and relative humidity (RH: 0%, 50%, and 100%)). The results revealed that the FA adsorption behavior onto both MOFs is exothermic in nature. Besides, their relative dominance for FA uptake varies interactively with the changes in RH and FA partial pressure levels. As the FA levels increase in dry conditions, their breakthrough volumes (BTV (100% BT)) exhibit contrasting trends: The values of U6N decreased noticeably from 5232 and 3792 L.atm.g(-1), while those of M199 increased from 4152 to 5772 L.atm.g(-1). The superiority of U6N over M199 in the lower FA level (at <5 Pa) is supported by the Lewis acid-base interactions with amine groups (U6N) in line with kinetic/isotherm studies. Such superiority is also persistent at higher (10 Pa) FA level under all humid conditions in line with its higher moisture stability. However, in dry conditions, the reversal of relative dominance in which M199 exhibits enhanced efficacy for 10 Pa FA uptake (relative to U6N) should reflect its breathing effects with the potent role of pore-diffusion mechanism. This study offers valuable insights into the construction of tunable adsorbents with enhanced adsorptivity toward key targets.
Keywords
Health, Toxicology and Mutagenesis, Pollution, Waste Management and Disposal, Environmental Chemistry, Environmental Engineering, Formaldehyde, UiO-66-NH2, MOF-199, Adsorption kinetic, Breakthrough isotherm, Thermodynamic study, VAPOR ADSORPTION CAPACITY, AQUEOUS-SOLUTIONS, ACTIVATED CARBON, SULFUR-COMPOUNDS, REMOVAL, ISOTHERM, BENZENE, MOF-5, TEMPERATURE, COMBINATION

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MLA
Tran, Thi Yen, et al. “Validation of Two Contrasting Capturing Mechanisms for Gaseous Formaldehyde between Two Different Types of Strong Metal-Organic Framework Adsorbents.” JOURNAL OF HAZARDOUS MATERIALS, vol. 424, no. Part B, 2022, doi:10.1016/j.jhazmat.2021.127459.
APA
Tran, T. Y., Younis, S. A., Heynderickx, P., & Kim, K.-H. (2022). Validation of two contrasting capturing mechanisms for gaseous formaldehyde between two different types of strong metal-organic framework adsorbents. JOURNAL OF HAZARDOUS MATERIALS, 424(Part B). https://doi.org/10.1016/j.jhazmat.2021.127459
Chicago author-date
Tran, Thi Yen, Sherif A. Younis, Philippe Heynderickx, and Ki-Hyun Kim. 2022. “Validation of Two Contrasting Capturing Mechanisms for Gaseous Formaldehyde between Two Different Types of Strong Metal-Organic Framework Adsorbents.” JOURNAL OF HAZARDOUS MATERIALS 424 (Part B). https://doi.org/10.1016/j.jhazmat.2021.127459.
Chicago author-date (all authors)
Tran, Thi Yen, Sherif A. Younis, Philippe Heynderickx, and Ki-Hyun Kim. 2022. “Validation of Two Contrasting Capturing Mechanisms for Gaseous Formaldehyde between Two Different Types of Strong Metal-Organic Framework Adsorbents.” JOURNAL OF HAZARDOUS MATERIALS 424 (Part B). doi:10.1016/j.jhazmat.2021.127459.
Vancouver
1.
Tran TY, Younis SA, Heynderickx P, Kim K-H. Validation of two contrasting capturing mechanisms for gaseous formaldehyde between two different types of strong metal-organic framework adsorbents. JOURNAL OF HAZARDOUS MATERIALS. 2022;424(Part B).
IEEE
[1]
T. Y. Tran, S. A. Younis, P. Heynderickx, and K.-H. Kim, “Validation of two contrasting capturing mechanisms for gaseous formaldehyde between two different types of strong metal-organic framework adsorbents,” JOURNAL OF HAZARDOUS MATERIALS, vol. 424, no. Part B, 2022.
@article{8726960,
  abstract     = {{In this research, the adsorption behavior of formaldehyde (FA) onto two types of metal-organic frameworks (MOFs: MOF-199 [M199] and UiO-66-NH2 [U6N]) is investigated against changes in the key process variables (e.g., FA partial pressure (0.5-10 Pa), temperature (30-120 degrees C), and relative humidity (RH: 0%, 50%, and 100%)). The results revealed that the FA adsorption behavior onto both MOFs is exothermic in nature. Besides, their relative dominance for FA uptake varies interactively with the changes in RH and FA partial pressure levels. As the FA levels increase in dry conditions, their breakthrough volumes (BTV (100% BT)) exhibit contrasting trends: The values of U6N decreased noticeably from 5232 and 3792 L.atm.g(-1), while those of M199 increased from 4152 to 5772 L.atm.g(-1). The superiority of U6N over M199 in the lower FA level (at <5 Pa) is supported by the Lewis acid-base interactions with amine groups (U6N) in line with kinetic/isotherm studies. Such superiority is also persistent at higher (10 Pa) FA level under all humid conditions in line with its higher moisture stability. However, in dry conditions, the reversal of relative dominance in which M199 exhibits enhanced efficacy for 10 Pa FA uptake (relative to U6N) should reflect its breathing effects with the potent role of pore-diffusion mechanism. This study offers valuable insights into the construction of tunable adsorbents with enhanced adsorptivity toward key targets.}},
  articleno    = {{127459}},
  author       = {{Tran, Thi Yen and Younis, Sherif A. and Heynderickx, Philippe and Kim, Ki-Hyun}},
  issn         = {{0304-3894}},
  journal      = {{JOURNAL OF HAZARDOUS MATERIALS}},
  keywords     = {{Health,Toxicology and Mutagenesis,Pollution,Waste Management and Disposal,Environmental Chemistry,Environmental Engineering,Formaldehyde,UiO-66-NH2,MOF-199,Adsorption kinetic,Breakthrough isotherm,Thermodynamic study,VAPOR ADSORPTION CAPACITY,AQUEOUS-SOLUTIONS,ACTIVATED CARBON,SULFUR-COMPOUNDS,REMOVAL,ISOTHERM,BENZENE,MOF-5,TEMPERATURE,COMBINATION}},
  language     = {{eng}},
  number       = {{Part B}},
  pages        = {{13}},
  title        = {{Validation of two contrasting capturing mechanisms for gaseous formaldehyde between two different types of strong metal-organic framework adsorbents}},
  url          = {{http://doi.org/10.1016/j.jhazmat.2021.127459}},
  volume       = {{424}},
  year         = {{2022}},
}
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