Page 18 - MSAM-2-4

Materials Science in Additive Manufacturing Emerging 3D-printed zeolitic gas adsorbents

Table 4. Comparison of 3D‑printed zeolite and polymer‑zeolite composite for gas adsorption
Material Printing Mechanical strength Gas adsorption properties References
technique
Zeolite 5A DIW • Compression strength: 0.05 – 0.35 MPa • BET surface area: 395 – 543 m /g [91]
2
• Young’s modulus: 1.65 – 9.45 MPa • CO adsorption capacities: 1.59 mmol/g using
2
5000 ppm (0.5%) CO in nitrogen at room temperature
2
Zeolite 5A + Torlon DIW Compression strength: around 210 MPa • BET surface area: 59 m /g [109]
2
• CO adsorption isotherms: CO 2
2
uptake=1.83 mmol/g at 35°C and 1 bar
Zeolite 5A + PEG- DLW • Maximum storage modulus: 67.3 MPa BET surface area: 626 m /g [111]
2
diacrylate (75% zeolite filler)
• Maximum loss modulus: 5.5 MPa
(75% zeolite filler)
2
Zeolite 13X DIW • Compression strength: 0.3 – 0.69 MPa • BET surface area: 498 – 571 m /g [91]
• Young’s modulus: 7.5 – 15 MPa • CO adsorption capacities: 1.6 mmol/g using 5000 ppm
2
(0.5%) CO in nitrogen at room temperature
2
Zeolite 13X + Torlon DIW Compression strength: around 210 MPa • BET surface area: 93 m /g [109]
2
• CO adsorption isotherms: CO 2
2
uptake=1.51 mmol/g at 35°C and 1 bar
Zeolite 13X + PEG- DLW • Maximum storage modulus: Around BET surface area: 834 m /g [111]
2
diacrylate 18.5 MPa (50% zeolite filler)
• Maximum loss modulus: 2.48 MPa
(60% zeolite filler)
Abbreviations: BET: Brunauer-Emmett-Teller; DIW: Direct ink writing; DLW: Direct laser writing; PEG: Polyethylene glycol.
A

B

Figure 11. (A) The synthetic procedure of zeolitic imidazolate framework-8 (ZIF-8) catalyst, where zinc nitrate hexahydrate (chemical formula:
Zn(NO ) ·6H O) reacts with 2-methylimidazole (chemical formula: C H N ) to yield ZIF-8 basic structural units; (B) Scanning electron microscopy (SEM)
4
6
3 2
2
2
images of hexagonal synthetic ZIF-8 particles with an average particle size was about 500 nm. Adapted with permission from Bragina et al. [112] .
zeolitic gas adsorbents through traditional or 3D printing Consequently, these factors have a significant effect on the
methods. Researchers have explored various porous adsorption performance of the monolith.
structural designs to optimize the adsorption capacity In the study by Couck et al., the authors employed DIW
and selectivity of the printed zeolitic adsorbents [117,118] . with a fiber diameter of 400 μm and an inter-fiber distance
Compared to traditional manufacturing methods, 3D of 500 μm to fabricate zeolite monolith for gas adsorption .
[96]
printing enables the fabrication of zeolitic gas adsorbent The monolithic structure was characterized by a scanning
with complex and intrinsic geometry. The wall thickness, electron microscope (SEM) with a CO adsorption capacity
2
channel diameter, and channel shape of a zeolite monolith of 1.6 mmol/g at room temperature and atmospheric
have a direct impact on mass transfer within the monolith. pressure . The same group of authors used thinner fibers
[96]

Volume 2 Issue 4 (2023) 12 https://doi.org/10.36922/msam.1880