Isotherm and Thermodynamic Analysis of Carbon Dioxide on Activated Carbon

Rashidi, Nor Adilla; Yusup, Suzana; Borhan, Azry

doi:10.1016/j.proeng.2016.06.527

Cited by 124 publications

(67 citation statements)

References 34 publications

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“…It is clearly seen that the surface area and mean width of micropores have a high goodness with fitted data, which give an impression about the importance of both of them. The results show also that the use of KOH and raw material is the most appropriate way to give the higher specific surface area as is the case with some other previously published works [45,46]. Fig.…”

Section: Resultssupporting

confidence: 75%

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

daiem¹,

Alotaibi²,

Alosime³

et al. 2020

Pol. J. Environ. Stud.

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Activated carbons have been prepared from rice straw by considering the material forms of rice straw, the chemical activation agent and the preparation method. The study seeks optimal conditions for giving better mico-and nano-properties, and to support the corresponding molecular structure. All the obtained results are referred to those of a commercial sample. Fourier transform infrared absorption, X-ray photoelectron spectroscopy, and dispersive X-ray spectroscopy are combined to determine functional groups. Moreover, a quantum chemical calculation has been done using density functional theory to argue the proposed molecular structure. Principally, the vibrational properties are compared to experimental results, and the corresponding electronic structure is calculated. Thermal stability and eventual reactions are evidenced by both differential and gravimetric thermal analysis. The surface topography of the resulting activated carbon is checked by scanning electron microscope and correlated with their chemical and textual characteristics carried out from Brunauer, Emmett and Teller analysis. Results illustrate that the resulting product is a mixture of carbon graphic structure and acidic/basic entities and exhibit a global acidic pH. The use of KOH as oxidant agent and the ground raw material form leads to obtain good properties such as higher surface area and higher porosity. Based on the size compatibility making it possible to introduce low-radius single-walled carbon nanotubes, the electronic structures of the prepared activated carbon and that of chiral (5,5) SWCNTs and their corresponding *

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Section: Resultssupporting

confidence: 75%

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

daiem¹,

Alotaibi²,

Alosime³

et al. 2020

Pol. J. Environ. Stud.

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show abstract

“…The parameter of the both isotherms are summarized in Table . Maximum monolayer adsorption of CO 2 (Vm) and the Langmuir adsorption constant (K L ) values are decreasing with the increase in temperature (273 K to 298 K), these results confirm that the process of adsorption of CO 2 by Si‐PAs is exothermic process . The R 2 value of Freundlich isotherms are around 0.99, this data indicates that the surface of Si‐PAs is heterogeneous.…”

Section: Resultssupporting

confidence: 65%

“…Maximum monolayer adsorption of CO 2 (Vm) and the Langmuir adsorption constant (K L ) values are decreasing with the increase in temperature (273 K to 298 K), these results confirm that the process of adsorption of CO 2 by Si-PAs is exothermic process. [47,48] The R 2 value of Freundlich isotherms are around 0.99, this data indicates that the surface of Si-PAs is heterogeneous. The n value is greater than 1 and the 1/n value is below 1, these results reveal that the adsorption process is physisorption which is more favorable for adsorption.…”

Section: Co 2 Adsorption Studiesmentioning

confidence: 69%

Selective Carbon Dioxide Capture Using Silica‐Supported Polyaminals

et al. 2019

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The development of a stable CO2 sequestration material is an urgent need for effective CO2 capture applications. In this sense, the silica supported materials are envisaged as promising materials. In this work the synthesis of silica supported polyaminals (Si‐PA‐1 and Si‐PA‐2) by single step condensation is achieved and characterized by FT‐IR and solid‐state NMR spectral techniques. The surface morphology and crystallinity are studied using SEM and PXRD techniques. The BET surface of the Si‐PA‐1 and Si‐PA‐2 is around 155 m2/g which is demonstrated using N2 adsorption. The CO2 uptake for Si‐PA‐1 and Si‐PA‐2 are observed around 45 mg/g. The high selectivity of CO2 over N2 (180.6) and considerable selectivity of CO2 over CH4 (38.7) are observed. Two types of adsorption isotherm models (Langmuir and Freundlich model) are used to evaluate isotherm parameters. Thermodynamic parameters such as Gibb's free energy, change in enthalpy and entropy are calculated from Van't Hoff equation and these results suggest that the adsorption is spontaneous and exothermic process. The physical interaction between Si‐PAs and CO2 is confirmed by the heat of adsorption (37‐22 KJ/mol) evaluated from Clausius–Clapeyron equation.

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“…But, due to an increase in the global warming scenario, CO 2 being considered as a desired product of combustion needs to be addressed properly 3 . It is also considered as a leading contributor to greenhouse gas emissions 4,5 . It is estimated that the average CO 2 concentration may rise up to 570 PPM by the year 2100; ultimately, it would increase the sea level by 38 cm and rise the global temperature by about 1.9℃ 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on capture of CO₂ and other pollutants from an SI engine using the physical adsorption technique

Subramaniam¹,

Satish.²,

Solomon

et al. 2020

Heat Trans

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Carbon dioxide (CO2) is considered as a major contributor to global warming. Automobile contributes to around 65% of total carbon dioxide emissions globally when compared with other sources. On considering the upcoming stringent emission norms, this problem needs to be addressed properly. In this proposed study, an attempt is made to capture CO2 and other emissions from spark ignition engines using activated carbon as an adsorbent. In the initial part of this study, a numerical investigation on backpressure was carried out by varying the porosity factor of activated carbon. Computational analysis is carried out by placing activated carbon at three different variations. It is done by varying three different porosity percentages 30, 35, and 45 by placing activated carbon at three different locations. The final study reveals that activated carbon placed at the PC 35‐3 layout shows optimum backpressure and high filtration efficiency when compared with the other two layouts. Then, the PC35‐3 layout is fabricated and tested on a three‐cylinder, carburetted, variable speed, water‐cooled petrol engine at various load conditions (0%, 25%, 50%, 75%, and 100%.). Final results show that considerable amount of hydrocarbon, carbon monoxide, and CO2 gets reduced while operating the engine at idle and part load conditions and reduced exhaust gas temperature.

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Isotherm and Thermodynamic Analysis of Carbon Dioxide on Activated Carbon

Cited by 124 publications

References 34 publications

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

Selective Carbon Dioxide Capture Using Silica‐Supported Polyaminals

Numerical and experimental investigation on capture of CO₂ and other pollutants from an SI engine using the physical adsorption technique

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Isotherm and Thermodynamic Analysis of Carbon Dioxide on Activated Carbon

Cited by 124 publications

References 34 publications

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

Structural-Property Relationship in Activated Carbon Synthesized from Rice Straw for Electronic Application

Selective Carbon Dioxide Capture Using Silica‐Supported Polyaminals

Numerical and experimental investigation on capture of CO2 and other pollutants from an SI engine using the physical adsorption technique

Contact Info

Product

Resources

About

Numerical and experimental investigation on capture of CO₂ and other pollutants from an SI engine using the physical adsorption technique