Carbon dioxide sequestration and methane removal from exhaust gases using resorcinol–formaldehyde activated carbon xerogel

Awadallah‐F, Ahmed; Al‐Muhtaseb, Shaheen A.

doi:10.1007/s10450-013-9508-5

Cited by 21 publications

(12 citation statements)

References 16 publications

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“…2-1.3 mmol g −1 for GCAC/600, which is in accordance with the report data indicating that favorable interactions exist among adsorbed CO 2 molecules 61. For GCAC/600, the Q st value of CH 4 increased from 18 kJ mol −1 to 21 kJ mol −1 with increasing loading <0.3 mmol g −1 .…”

supporting

confidence: 90%

Enhanced uptake capacities and isosteric heats of CO2and CH4adsorption onspent coffee ground activated carbons loaded with metal ions

Kırbıyık¹,

Büyükbekar²,

Kuş³

et al. 2019

Turk J Chem

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Low-cost activated carbon (AC) samples obtained from waste coffee grounds were used for CO 2 and CH 4 adsorption. ACs were prepared by chemical activation and carbonized at three different temperatures. AC carbonized at 800 • C showed a relatively high surface area (582.92 m 2 g −1) and high adsorption capacities of 2.6 mmol g −1 and 1.1 mmol g −1 at 25 • C for CO 2 and CH 4 , respectively. Adsorbent samples were prepared by loading of Fe 3+ metal ions onto ACs and their adsorption capacities were compared with those of nonloaded ACs. As expected, the loading of Fe 3+ metal ions increased the adsorption capacities at all temperatures and the adsorption capacity of Fe 3+-loaded AC carbonized at 800 • C was 3.1 mmol g −1 for CO 2 and 1.2 mmol g −1 for CH 4 at 25 • C. The isosteric heats of adsorption were calculated at 0-35 • C with the range of 20-35 kJ mol −1 and 18-23 kJ mol −1 for CO 2 and CH 4 , respectively. According to our findings, bio-based ACs can be used as an effective and alternative adsorbent for capturing different gas molecules.

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supporting

confidence: 90%

Enhanced uptake capacities and isosteric heats of CO2and CH4adsorption onspent coffee ground activated carbons loaded with metal ions

Kırbıyık¹,

Büyükbekar²,

Kuş³

et al. 2019

Turk J Chem

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“…The isosteric heat of adsorption (Q st ) can be estimated by the Clausius-Clapeyron approximation [25] as…”

Section: Isosteric Heat Of Adsorptionmentioning

confidence: 99%

Adsorption of Carbon Dioxide, Methane, and Nitrogen Gases onto ZIF Compounds with Zinc, Cobalt, and Zinc/Cobalt Metal Centers

Awadallah‐F

Hillman

Al‐Muhtaseb

et al. 2019

Journal of Nanomaterials

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ZIF-8, Co-ZIF-8, and Zn/Co-ZIF-8 are utilized in adsorbing nitrogen (N2), methane (CH4), and carbon dioxide (CO2) gases at temperatures between 25 and 55°C and pressures up to ~1 MPa. Equilibrium adsorption isotherms and adsorption kinetics are studied. The dual-site Langmuir equation is employed to correlate the nonisothermal adsorption equilibrium behavior. Generally, N2 showed the lowest equilibrium adsorption quantity on the three samples, whereas CO2 showed the highest equilibrium adsorption capacity. Amid the ZIF samples, the biggest adsorption quantities of N2 and CH4 were onto Zn/Co-ZIF-8, whereas the highest adsorption quantity of CO2 was on ZIF-8. The isosteric heats of adsorbing these gases on ZIF-8, Co-ZIF-8, and Zn/Co-ZIF-8 were examined. Moreover, the overall mass transfer coefficients of adsorption at different temperatures were investigated.

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“…The collected data were imported from different works in the literature in order to study the adsorption phenomena of pure gases (CO 2 , CH 4 , and N 2 ), their binary mixtures, and their ternary mixtures on different activated carbons (Table 1). 2,9,33,[54][55][56][57][58][59][60][61][62][63] For each database (DB1, DB2, DB3, DB4, DB5, DB6, and DB7) (Table 2), a set of input variables were identified. For DB1, DB2, and DB3, the inputs were the characteristics of activated carbons (specific surface area and micropore volume), and the operating conditions (temperature and pressure).…”

Section: Database Collectionmentioning

confidence: 99%

Modelling of Adsorption of Methane, Nitrogen, Carbon Dioxide, Their Binary Mixtures, and Their Ternary Mixture on Activated Carbons Using Artificial Neural Network

2019

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This work examines the use of neural networks in modelling the adsorption process of gas mixtures (CO2, CH4, and N2) on different activated carbons. Seven feed-forward neural network models, characterized by different structures, were constructed with the aim of predicting the adsorption of gas mixtures. A set of 417, 625, 143, 87, 64, 64, and 40 data points for NN1 to NN7, respectively, were used to test the neural networks. Of the total data, 60 %, 20 %, and 20 % were used, respectively, for training, validation, and testing of the seven models. Results show a good fit between the predicted and experimental values for each model; good correlations were found (R = 0.99656 for NN1, R = 0.99284 for NN2, R = 0.99388 for NN3, R = 0.99639 for Q1 for NN4, R = 0.99472 for Q2 for NN4, R = 0.99716 for Q1 for NN5, R = 0.99752 for Q3 for NN5, R = 0.99746 for Q2 for NN6, R = 0.99783 for Q3 for NN6, R = 0.9946 for Q1 for NN7, R = 0.99089 for Q2 for NN7, and R = 0.9947 for Q3 for NN7). Moreover, the comparison between the predicted results and the classical models (Gibbs model, Generalized dual-site Langmuir model, and Ideal Adsorption Solution Theory) shows that the neural network models gave far better results.

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Carbon dioxide sequestration and methane removal from exhaust gases using resorcinol–formaldehyde activated carbon xerogel

Cited by 21 publications

References 16 publications

Enhanced uptake capacities and isosteric heats of CO2and CH4adsorption onspent coffee ground activated carbons loaded with metal ions

Enhanced uptake capacities and isosteric heats of CO2and CH4adsorption onspent coffee ground activated carbons loaded with metal ions

Adsorption of Carbon Dioxide, Methane, and Nitrogen Gases onto ZIF Compounds with Zinc, Cobalt, and Zinc/Cobalt Metal Centers

Modelling of Adsorption of Methane, Nitrogen, Carbon Dioxide, Their Binary Mixtures, and Their Ternary Mixture on Activated Carbons Using Artificial Neural Network

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