Dynamic CO2 sorption on MgO-based sorbent in the presence of CO and H2O at elevated pressures

Bang, Gina; Kim, Kyung-Min; Jin, Seongmin; Lee, Chang Ha

doi:10.1016/j.cej.2022.134607

Cited by 15 publications

(6 citation statements)

References 41 publications

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“…In addition, The CO 2 physisorption process involves the binding of the CO 2 molecule to the Cu 2+ center of HKUST-1 [ 51 ]. Also, the CO 2 adsorption on MgO occurs through monodentate and bidentate carbonate species [ 52 ].…”

Section: Resultsmentioning

confidence: 99%

CO2 conversion in a dielectric barrier discharge plasma by argon dilution over MgO/HKUST-1 catalyst using response surface methodology

Hatami,

Khani,

Razavi Rad

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

CO2 conversion in a dielectric barrier discharge plasma by argon dilution over MgO/HKUST-1 catalyst using response surface methodology

Hatami,

Khani,

Razavi Rad

et al. 2024

Heliyon

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“…Figure 2a depicts the DRIFTS spectra of as-prepared Mg 13 CuCeO x and CuCeO x samples under He at 25 °C. Hydroxyl groups, bands within the range of 3300–3800 cm −1 , were observed and consisted of multi-coordinated surface OH group (bands <3650 cm −1 ) and mono-coordinated surface OH groups (bands >3650 cm −1 ) 34 . Mg 13 CuCeO x had a larger amount of OH groups.…”

Section: Resultsmentioning

confidence: 99%

Mg-incorporated sorbent for efficient removal of trace CO from H2 gas

Bang,

Jin,

Kim

et al. 2023

Nat Commun

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Removal of trace CO impurities is an essential step in the utilization of Hydrogen as a clean energy source. While various solutions are currently employed to address this challenge, there is an urgent need to improve their efficiency. Here, we show that a bead-structured Mg, Cu, and Ce-based sorbent, Mg13CuCeOx, demonstrates superior removal capacity of trace CO from H2 with high stability. The incorporation of Mg boosts sorption performance by enhancing the porous structure and Cu+ surface area. Remarkably, compared to existing pelletized sorbents, Mg13CuCeOx exhibits 15.5 to 50 times greater equilibrium capacity under pressures below 10 Pa CO and 31 times longer breakthrough time in removing 50 ppm CO in H2. Energy-efficient oxidative regeneration using air at 120 °C allows its stable sorption performance over 20 cycles. Through in-situ DRIFTS analysis, we elucidate the reaction mechanism that Mg augments the surface OH groups, promoting the formation of bicarbonate and formate species. This study highlights the potential of MgCuCeOx sorbents in advancing the hydrogen economy by effectively removing trace CO from H2.

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“…Nevertheless, the disadvantages related to an intensive energy requirement for solvent regeneration, equipment corrosion issues and the poor cyclic stability of sorbents due to amine degradation render this process less desirable. [11][12][13] To date, extensive research have pivoted toward CO 2 adsorptive separation using porous solid substrates such as zeolites, [14][15][16] silicas, [17][18][19] carbonaceous materials, [20][21][22] metal oxides, [23][24][25] and metal-organic frameworks (MOF). [26][27][28] This approach carries benefits like simplicity, cost-effectiveness and energy efficiency with high stability throughout looping processes, making it a promising alternative for CO 2 capture separation.…”

Section: Introductionmentioning

confidence: 99%

Utilizing Gelatin Waste for Efficient Bimodal Porous Silica Adsorbents for Carbon Dioxide Capture

Numpilai,

Witoon

2023

ChemPlusChem

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This study explores the modification of pore structures in porous silica materials synthesized using sodium silicate and waste gelatin, under varying silica‐to‐gelatin ratios. At ratios of 1.0–1.5, bimodal porous silica with mesopores and macropores emerged due to spaces between silica nanoparticles and clusters, following gelatin elimination. The study further evaluated the obtained bimodal porous silica as polyethyleneimine (PEI) supports for CO2 capture, alongside PEI‐loaded unimodal porous silica and hollow silica sphere for comparison. Notably, the PEI‐loaded bimodal silica showcased superior CO2 uptake, achieving 145.6 mg g−1 at 90 °C. Transmission electron microscopy (TEM) revealed PEI′s uniform distribution within the pores of bimodal silica, unlike the excessive surface layering seen in unimodal silica. Conversely, PEI completely filled the hollow porous silica‘s interior, extending gas molecule diffusion distance. All sorbents displayed nearly constant CO2 adsorption across 20 cycles, demonstrating outstanding stability. Notably, the bimodal porous silica displayed a negligible capacity loss, underscoring its robust performance.

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Dynamic CO2 sorption on MgO-based sorbent in the presence of CO and H2O at elevated pressures

Cited by 15 publications

References 41 publications

CO2 conversion in a dielectric barrier discharge plasma by argon dilution over MgO/HKUST-1 catalyst using response surface methodology

CO2 conversion in a dielectric barrier discharge plasma by argon dilution over MgO/HKUST-1 catalyst using response surface methodology

Mg-incorporated sorbent for efficient removal of trace CO from H2 gas

Utilizing Gelatin Waste for Efficient Bimodal Porous Silica Adsorbents for Carbon Dioxide Capture

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