Immobilization of Choline Chloride: Urea onto Mesoporous Silica for Carbon Dioxide Capture

Ghazali, Zaitun; Hassan, Nur Hasyareeda; Yarmo, Mohd Ambar; Teh, Lee Peng; Othaman, Rizafizah

doi:10.17576/jsm-2019-4805-11

Cited by 17 publications

(3 citation statements)

References 23 publications

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“…Additionally, all modified adsorbents adsorbed less N2 because the deposited BMC materials (fresh adsorbents) and H2S components (exhausted adsorbents) partially filled or blocked the micropores of the adsorbents. The excess BMC material deposited on the surface of the adsorbents also resulted in low N2 adsorption, as confirmed by Ghazali et al [50], who showed that the BMC materials blocked the mesopores, preventing the N2 from diffusing inside the pore. Following the N2 adsorption experiments, the surface properties of the porous adsorbents (i.e., BET, average pore size, and pore volume) were determined as shown in Table 2.…”

Section: Surface Analysis Of Bmc Adsorbentsmentioning

confidence: 57%

Performance and Characterization of Bi-Metal Compound on Activated Carbon for Hydrogen Sulfide Removal in Biogas

Zulkefli

Azam²,

Masdar

et al. 2022

Molecules

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This study reports on the synthesis of bi-metal compound (BMC) adsorbents based on commercial coconut activated carbon (CAC), surface-modified with metal acetate (ZnAc2), metal oxide (ZnO), and the basic compounds potassium hydroxide (KOH) and sodium hydroxide (NaOH). The adsorbents were then characterized by scanning electron microscopy and elemental analysis, microporosity analysis through Brunauer–Emmett–Teller (BET) analysis, and thermal stability via thermogravimetric analysis. Adsorption–desorption test was conducted to determine the adsorption capacity of H2S via 1 L adsorber and 1000 ppm H2S balanced 49.95% for N2 and CO2. Characterization results revealed that the impregnated solution homogeneously covered the adsorbent surface, morphology, and properties. The adsorption test result reveals that the ZnAc2/ZnO/CAC_B had a higher H2S breakthrough adsorption capacity and performed at larger than 90% capability compared with a single modified adsorbent (ZnAc2/CAC). Therefore, the synthesized BMC adsorbents have a high H2S loading, and the abundance and low cost of CAC may lead to favorable adsorbents in H2S captured.

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Section: Surface Analysis Of Bmc Adsorbentsmentioning

confidence: 57%

Performance and Characterization of Bi-Metal Compound on Activated Carbon for Hydrogen Sulfide Removal in Biogas

Zulkefli

Azam²,

Masdar

et al. 2022

Molecules

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“…Also, the interaction between DES molecules weakened, which increases the free volume and results in the diffusion of gas. Ghazali et al 25 found that the modification of mesoporous silica gel (SG) with impregnation of ChCl:urea can be considered as a promising adsorbent for CO 2 capture at atmospheric pressure and ambient temperature. However, the data of the isotherm of the NH 2 -MIL101(Cr) impregnated with the DES for the separation process are scarce.…”

Section: ■ Introductionmentioning

confidence: 99%

Improving the Separation of CO₂/N₂ Using Impregnation of a Deep Eutectic Solvent on a Porous MOF

Noorani,

Mehrdad

2024

ACS Omega

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As the partial pressure of CO 2 in flue gas is 0.1−0.2 bar, CO 2 capture at a low pressure needs more attention. Under low pressure conditions, the functional metal−organic framework (MOF) is powerful for CO 2 capture. One of the effective methods to increase the absorption capacity of the MOF is impregnation with deep eutectic solvents. In this research, NH 2 -MIL101(Cr) is impregnated with a deep eutectic solvent of choline chloride:urea (DES ChCl:urea) to enhance the adsorption capacity. The CO 2 and N 2 adsorption capacity of NH 2 -MIL101(Cr) and DES/NH 2 -MIL101(Cr) was investigated at temperatures of 288.15−303.15 K and pressures up to 1 bar. The obtained results indicate that the adsorption capacity of the MOF increases by 1.7 and 3 times with the impregnated DES for CO 2 and N 2 , respectively. Nevertheless, the pore volume of the MOF decreased after impregnation, but the adsorption capacity of the MOF increased due to the interaction of the adsorbate with the confined DES in pores. The contribution of the impregnated DES to adsorption capacity is explained according to Henry's law. Also, high heats of adsorption are attributed to the strong interaction between modified NH 2 -MIL101(Cr) and CO 2 . Also, the sample was refined at 298 K and vacuum and was reused without considerable reduction of the CO 2 capture capacity after 6 times. Moreover, the impregnation of ChCl:urea into NH 2 -MIL101(Cr) nanostructures was studied using density functional theory-based approaches.

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“…Although DESs have attracted large attention, the investigations concerning the impregnation of solid sorbents using DES for adsorptive purification of gas streams are limited. In several works the authors described the impregnation of activated carbon with the use of choline chloride:urea (1:2 molar ratio), silica gel with choline chloride:glycerol (1:2) [34], and choline chloride:urea (1:2 molar ratio) [35] and using them to remove carbon dioxide from the gas streams.…”

Section: Introductionmentioning

confidence: 99%

Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams

2020

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The paper presents the preparation of new adsorbents based on silica gel (SiO2) impregnated with deep eutectic solvents (DESs) to increase benzene, toluene, ethylbenzene, and p-xylene (BTEX) adsorption efficiency from gas streams. The DESs were synthesized by means of choline chloride, tetrapropylammonium bromide, levulinic acid, lactic acid, and phenol. The physico-chemical properties of new sorbent materials, including surface morphology and structures, as well as porosity, were studied by means of thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller analysis. The effect of DESs type, flow rate, and initial concentration of BTEX were also investigated followed by regeneration and reusability of adsorbents. The results indicate that SiO2 impregnated with tetrapropylammonium bromide and lactic acid in a 1:2 molar ratio have great potential for the removal of BTEX from gas streams. Its adsorption capacity was higher than the pure SiO2 and other developed SiO2-DES adsorbents. This result can be explained by the specific interaction between DESs and BTEX, i.e., hydrogen bonds interaction.

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Immobilization of Choline Chloride: Urea onto Mesoporous Silica for Carbon Dioxide Capture

Cited by 17 publications

References 23 publications

Performance and Characterization of Bi-Metal Compound on Activated Carbon for Hydrogen Sulfide Removal in Biogas

Performance and Characterization of Bi-Metal Compound on Activated Carbon for Hydrogen Sulfide Removal in Biogas

Improving the Separation of CO₂/N₂ Using Impregnation of a Deep Eutectic Solvent on a Porous MOF

Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams

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Immobilization of Choline Chloride: Urea onto Mesoporous Silica for Carbon Dioxide Capture

Cited by 17 publications

References 23 publications

Performance and Characterization of Bi-Metal Compound on Activated Carbon for Hydrogen Sulfide Removal in Biogas

Performance and Characterization of Bi-Metal Compound on Activated Carbon for Hydrogen Sulfide Removal in Biogas

Improving the Separation of CO2/N2 Using Impregnation of a Deep Eutectic Solvent on a Porous MOF

Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams

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Improving the Separation of CO₂/N₂ Using Impregnation of a Deep Eutectic Solvent on a Porous MOF