Highly Porous Carbon Xerogels Doped with Cuprous Chloride for Effective CO Adsorption

Zhu, Qiankun; Wang, Xiao Dong; Chen, Dong; Wu, Xueling; Zhang, Chen; Zou, Wenbing; Shen, Jun

doi:10.1021/acsomega.8b03647

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…On the surface of diatomite, CO is physically adsorbed via van der Waals force. In contrast, CO is chemically adsorbed on CuCl-modified diatomites via the interaction between Cu + ions and CO to form π-complexation bonds [15]. e Cu 2+ ions in the sample and CO are linked by the electrostatic bond and unable to form formation of the π-complexation bond [13].…”

Section: Carbon Monoxide Adsorption On Diatomite and Cucl-modified DImentioning

confidence: 99%

“…Among many methods for CO removal, adsorption is widely used due to its high efficiency and lowcost treatment. Adsorbents for selective carbon monoxide adsorption such as metal-organic frameworks, zeolite, activated carbons, grapheme, and metal oxides have been reported in the literature [6][7][8][9][10][11][12][13][14][15]. Recently, Manh et al [13] reported that graphene oxide modified with Cu (I) showed much higher CO adsorption capacity than that of unmodified graphene oxide.…”

Section: Introductionmentioning

confidence: 99%

“…Xue et al [14] synthesized CuCl-modified activated carbon (CuCl/AC), which showed a high CO adsorption capacity of 45.4 cm 3 /g, 4 times higher than that of activated carbon (11.5 cm 3 /g). Doping carbon xerogels with CuCl also found to significantly increase its CO adsorption capacity [15]. He et al [12] synthesized the CuCl/MCM-41, ZnCl 2 /MCM-41, and Zn-Cu (I)/MCM-41 materials for CO adsorption.…”

Section: Introductionmentioning

confidence: 99%

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High CO Adsorption Performance of CuCl-Modified Diatomites by Using the Novel Method “Atomic Implantation”

Nguyen

et al. 2021

Journal of Chemistry

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An atomic implantation method was used to modify diatomite with CuCl. The CuCl/diatomite samples were characterized by different techniques, including FTIR, XRD, BET, SEM-TEM, EDX, and CO-TPR. Characterization results revealed the formation of CuCl particles of 50–60 nm highly dispersed on diatomite surface. CO adsorption measurements showed that 2CuCl/diatomite exhibits the highest CO adsorption capacity among all CuCl-modified samples with diatomite. Its CO adsorption capacity of 2.96 mmol/g at 30°C is 10 times higher than that of unmodified diatomite (0.29 mmol/g). The CO adsorption on CuCl-modified diatomites was found to fit well with the Langmuir–Freundlich model.

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Section: Carbon Monoxide Adsorption On Diatomite and Cucl-modified DImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High CO Adsorption Performance of CuCl-Modified Diatomites by Using the Novel Method “Atomic Implantation”

Nguyen

et al. 2021

Journal of Chemistry

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“…However, CO usually coexists with H 2 , CO 2 , CH 4 , N 2 , and H 2 O in the waste gas in actual production, , and CO should be separated and purified before it is applied. At the same time, CO is a toxic gas, , and CO could cause human body poisoning when its concentration reaches 0.02%; CO could cause explosion when its concentration increases to 12.5–74.2% . Additionally, when the concentration of CO exceeds 0.2 ppmv in the proton exchange membrane of the fuel cell, CO should make the platinum electrocatalyst damaged .…”

Section: Introductionmentioning

confidence: 99%

Suppressing the Competitive Effect of Water Vapor on CO Adsorption over 5A Molecular Sieves via Silanization Hydrophobic Modification

Qiao

Xiao

Yang

et al. 2022

Ind. Eng. Chem. Res.

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Recently, the investigation of high-efficiency adsorbents for CO adsorption and separation has gradually become a research focus with carbon energy chemistry developing and environmental protection requirement enhancing. The adsorption performance of CO would be devitalized under a humid environment, although the traditional molecular sieves could serve as an effective adsorbent toward CO adsorption under an anhydrous atmosphere. In this work, a strategy of silanization modification was proposed to enhance the performance of CO adsorption by restraining the surface occupied by competitive water molecules due to the hydrophilic nature of silica hydroxyl groups on the 5A molecular sieves. A series of hydrophobic CO adsorbents (X-B-5A) were successfully prepared via impregnation using butyltrichlorosilane (BTS) as a hydrophobic agent, toluene as a dispersion solution, and commercial 5A molecular sieves as a raw material. The effect of different concentrations of BTS in toluene solution on hydrophobicity and CO adsorption performance was investigated. The results showed that the hydrophobicity of X-B-5A was significantly increased after silanization modification. Additionally, the water contact angle of 0.004-B-5A increased from 20° to 154°, and the static water vapor adsorption capacity was reduced from 27.5 to 6.0% at 35 °C. The CO static adsorption capacity of 0.004-B-5A still reached 1.54 mmol/g, which was only 14.6% lower than that of pristine 5A molecular sieves. Additionally, the dynamic adsorption capacity of CO over the as-prepared X-B-5A was significantly enhanced compared to pristine 5A molecular sieves in the presence of moisture. The as-prepared hydrophobic adsorbents exhibited satisfactory CO adsorption performance and high thermal stability in a humid environment. This work presents a novel strategy for the preparation of adsorbents toward CO adsorption employed under a high relative humidity environment.

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“…One of the most widely used methods for dealing with these toxic gases is to adsorb them using porous materials such as activated carbon (AC). − For example, Park et al evaluated N 2 O adsorption by ACs and carbon molecular sieves (CMSs) at 293 K and 100 kPa, and the uptakes are 3.6 and 2.4 mol/kg, respectively . It was also reported that at a high temperature (423 K), the uptakes of SO 2 and CO by AC are 11.7 and 0.88 mg/g, respectively .…”

Section: Introductionmentioning

confidence: 99%

Screening of Porous Materials for Toxic Gas Adsorption: Classical Density Functional Approach

Guo

Liu

et al. 2020

Ind. Eng. Chem. Res.

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A computer-aided method was developed to screen promising toxic gas adsorbents. The method was based on classical density functional theory (CDFT) with molecular models constructed using quantum density functional theory (QDFT). The accuracy of the theory was first examined by comparison to experimental data. Then, the theory was applied to the screening of 6,301 porous materials for the adsorption of eight toxic gases. At low (100 ppmv) and high (1 bar) concentrations, respectively, zeolites and MOFs appear to be the most promising adsorbents for the gases except CO. A universal correlation between the uptake and heat of adsorption exists for most systems, and the few adsorbents that fail to follow this correlation appear to be promising reusable adsorbents. The flexibility effect is considered by molecular dynamics simulations, which plays an important role in the adsorption and might lead to a significant (more than 95%) decrease in the uptake for the favorable adsorbents.

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Highly Porous Carbon Xerogels Doped with Cuprous Chloride for Effective CO Adsorption

Cited by 12 publications

References 32 publications

High CO Adsorption Performance of CuCl-Modified Diatomites by Using the Novel Method “Atomic Implantation”

High CO Adsorption Performance of CuCl-Modified Diatomites by Using the Novel Method “Atomic Implantation”

Suppressing the Competitive Effect of Water Vapor on CO Adsorption over 5A Molecular Sieves via Silanization Hydrophobic Modification

Screening of Porous Materials for Toxic Gas Adsorption: Classical Density Functional Approach

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