Pore Volume Distribution Research Articles

Study of pore structure of shale formation for CO2 storage

Carbon Geosequestration is considered a trending research area as it helps in mitigating the greenhouse gas effects on the environment by controlling global temperature. Recently, geo sequestration is considered one of the alternative ways to store CO2 for long periods. The shale is considered as the most suitable geological formation for CO2 storage due to its high adsorption capacity, microfractures, etc. Adsorption capacity in shale formation is highly influenced by pore structure, mineral composition, geomechanical properties, pressure, depth, etc. The shale pore structure is mainly dominated by mesopores (2–50 nm) and micropores (less than 2 nm). Storage of CO2 in the pores matrix is generally studied by using low-pressure N2 and CO2 adsorption isotherms, FE-SEM, etc. These techniques help in identifying types of pores, and their sizes, morphology, etc. Evaluation of pore microstructures helps to estimate the CO2 storage capacity in the formations. The present article discusses the importance of pore size, pore diameter, and pore volume distribution in shale formation for CO2 storage. A detailed review is carried out to analyze the methods of CO2 storage.

A critique on “Predicting capillary absorption of porous stones by a procedure based on an intermingled fractal units model”

In September 2014, this journal published “Predicting capillary absorption of porous stones by a procedure based on an intermingled fractal units model”, which describes the pore volume distribution of building stones via an intermingled fractal units approach and then calculates the capillary absorption coefficient of these materials based on a bundle-of-tubes model. Its results bring about the conclusion that “the sorptivity of natural stones used in historical buildings can be calculated from the pore size distribution determined by MIP”. This critique firstly verifies that there is no need for the detour via the intermingled fractal units, as the bundle-of-tubes approach can be applied on the mercury intrusion results directly. This direct model does though not yield the same capillary absorption coefficients, which resultantly invalidates the agreement between the measured and calculated capillary absorption coefficients reported in the disputed paper. This critique secondly identifies various defects in the disputed paper's calculation of the capillary absorption coefficients, but these do regrettably not readily explain all deviations. These observations bring about serious concerns on the outcomes of the disputed paper, and this critique invites its authors to placate these concerns in their reply.

Effect of the Structure of Highly Porous Silica Extracted from Sugarcane Bagasse Fly Ash on Aflatoxin B1 Adsorption.

Sugarcane bagasse fly ash is industrial waste produced by incinerating biomass to generate power and steam. The fly ash contains SiO2 and Al2O3, which can be used to prepare aluminosilicate. This latter material exhibits high potential as an adsorbent in various applications, including the livestock industry where issues related to contamination of aflatoxins in animal feeds need to be addressed; addition of adsorbents can help decrease the concentration of aflatoxins during feed digestion. In this study, the effect of the structure of silica prepared from sugarcane bagasse fly ash on physicochemical properties and aflatoxin B1 (AFB1) adsorption capability compared with that of bentonite was investigated. BPS-5, Xerogel-5, MCM-41, and SBA-15 mesoporous silica supports were synthesized using sodium silicate hydrate (Na2SiO3) from sugarcane bagasse fly ash as a silica source. BPS-5, Xerogel-5, MCM-41, and SBA-15 exhibited amorphous structures, while sodium silicate possessed a crystalline structure. BPS-5 possessed larger pore size, pore volume, and pore size distribution with a bimodal mesoporous structure, while Xerogel-5 exhibited lower pore size and pore size distribution with a unimodal mesoporous structure. BPS-5 with a negatively charged surface exhibited the highest AFB1 adsorption capability compared with other porous silica. However, the AFB1 adsorption capability of bentonite was superior to those of all porous silica. Sufficient pore diameter with high total pore volume as well as high intensity of acid sites and negative charge on the surface of the adsorbent is required to increase AFB1 adsorption in the in vitro gastrointestinal tract of animals.

Facile ultrasound-assisted synthesis of CuFe-Layered double hydroxides/g-C3N4 nanocomposite for alizarin red S sono-sorption

BackgroundLayered double hydroxides (LDHs) have gained significant attention due to their exceptional performance and wide range of applications. In the present work, an ultrasound-assisted method was used to prepare novel CuFe-LDH/g-C3N4 (CFL/CN) nanocomposites. MethodsA sonicator tank was used as the source of ultrasonic waves to synthesize nano-sorbents called CFL/CN. The hydrothermal method was also used to determine the effect of ultrasonic waves on the morphology of CFL/CN nano-sorbents. In addition, the characterization of nano-sorbents prepared by hydrothermal and sonication methods was performed by techniques including XRD, FTIR, XPS, SEM, TEM, and BET. Also, the performance of the as-prepared nanomaterials was evaluated in removing alizarin red S (ARS) as a pollutant model by both adsorption and sono-sorption methods. Significant FindingsThe results showed that due to the presence of strong shock waves and the production of microbubbles in the reaction media, the thickness of diffusion layers was diminished for the sono-sorption method and this technique presented a promoted adsorption capacity, subsequently. The FESEM imaging confirmed that the sono-synthesis method led to a more well-dispersed shape and uniform morphology of nanoparticles. The results of XRD analysis showed that the sono-synthesized sample (Sono-CFL/CN) possessed a short-range ordered and high-crystalline structure in comparison to the hydrothermally-synthesized one (Hydro-CFL/CN). Also, TEM revealed the layered morphology of Sono-CFL/CN nanosorbents. The results of BET analysis also showed that sono-CFL/CN has a uniform morphology and improved BET surface area, pore volume, and pore size distribution. The sono-sorption efficiency of ARS was more effective on sono-CFL/CN samples (96.16%) in comparison to hydro-CFL/CN samples (53.4%). Moreover, the isothermal studies revealed that ARS adsorption onto the fabricated nanosorbents had good accordance with the Langmuir isotherm suggesting uniform surface energies. Also, kinetics investigations confirmed that the ARS adsorption data was well-matched with Ho's pseudo-second-order kinetics model. Finally, the high stability and activity of Sono-CFL/CN for ARS sono-sorption after 4 cycles showed that this material can be used as an efficient and economic nanosorbent to remove various organic dyes from the aqueous effluents.

INVESTIGATION OF THE STRUCTURAL ADSORPTION PROPERTIES OF A COMPOSITE BASED ON MOLYBDENUM NANOPARTICLES IN A ZEOLITE MATRIX

The results of the study of the structure and adsorption properties of the Mo/zeolite composite obtained by enriching the zeolite of the Chuguevsky deposit of Primorsky Krai with Mo nanoparticles followed by sintering are presented. Its phase and elemental compositions are determined. The adsorption-structural characteristics of the composite are investigated using the BET method. In the work, the specific surface area, total pore volume and mesopore size distribution are determined. The results obtained are of interest for the production of catalytically-active materials based on zeolitic raw materials.

Glycerol acetylation over yttrium oxide (Y2O3) catalyst supported on palm kernel shell-derived carbon and parameters optimization studies using response surface methodology (RSM)

A biomass derived carbon supported yttrium oxide catalyst (Y2O3/PKS-T700) was synthesized and evaluated in glycerol acetylation reaction using four-factor, two-level face-centred central composite design (24 CCD) of the response surface methodology (RSM). The catalyst exhibited high glycerol conversion (GC) (99.8%) and product selectivity of 11.1%, 60.2%, and 29.6% monoacetin (MA), diacetin (DA) and triacetin (TA) under optimized conditions of temperature 130 ℃, glycerol-to-acetic acid molar ratio 1:12 and catalyst loading 0.5 g in 5 h reaction time. The catalyst was synthesized via carbonization of palm kernel shell (PKS), impregnated with 15 wt% yttrium oxide (Y2O3) and calcined appropriately. The synthesized catalyst was further characterized by N2 physisorption analysis (BET surface area), X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX), Fourier transform infra-red (FTIR), and temperature programmed desorption-ammonia (TPD-NH3). Results revealed that the catalyst is more of mesoporous material with large surface area, good pore volume and average size distributions. It is thermally stable with good acidity and various functional groups. On subjecting the catalyst to a reusability test in three (3) reaction cycles under the optimal conditions, it was found to maintain good acetylation reaction with little degradation.

Plastic behaviour of clay materials for the manufacture of fast-drying red ceramics

AbstractFast drying (~60 min) is useful for optimizing production processes by increasing productivity and reducing costs and environmental impacts, especially in red ceramic industries in Brazil. However, suitable clays are necessary and, currently, studies focused on the plastic behaviour of clays with compositions suitable for extrusion, especially for fast drying, are scarce. Therefore, in this study, three different clays from the same mineral deposit were studied for producing clay-based structural products via fast drying. The clays were characterized according to their chemical, mineralogical and thermal properties, particle size, cation-exchange capacity, specific surface area and open pore volume distribution. Ten formulations were developed using a simplex-centroid mixture design of experiments and their plasticity index (PI) values were determined. The response surfaces of the formulations were evaluated according to their PI, while the formation characteristics were determined according to their extrusion workability factor values. Formulations F5 (50.0 wt.% yellow clay and 50.0 wt.% green clay) and F8 (66.6 wt.% yellow clay, 16.7 wt.% grey clay and 16.7 wt.% green clay; PI = 15.5–16.6%) displayed optimal extrusion properties, followed by formulations F7 (33.3 wt.% yellow clay, 33.3 wt.% grey clay and 33.3 wt.% green clay) and F10 (16.7 wt.% yellow clay, 16.7 wt.% grey clay and 66.6 wt.% green clay; PI = 13.8–14.2%), which are within acceptable extrusion index values. Thus, the chosen formulations have significant potential for use in the manufacture of fast-drying red ceramics.

The Influence of Physical Mixing and Impregnation on the Physicochemical Properties of Pine Wood Activated Carbon Produced by One-Step ZnCl2 Activation.

In this study, two different sample preparation methods to synthesize activated carbon from pine wood were compared. The pine wood activated carbon was prepared by mixing ZnCl2 by physical mixing, i.e., "dry mixing" and impregnation, i.e., "wet mixing" before high temperature carbonization. The influence of these methods on the physicochemical properties of activated carbons was examined. The activated carbon was analyzed using nitrogen sorption (surface area, pore volume and pore size distribution), XPS, density, Raman spectroscopy, and electrochemistry. Physical mixing led to a slightly higher density carbon (1.83 g/cm3) than wet impregnation (1.78 g/cm3). Raman spectroscopy analysis also showed that impregnation led to activated carbon with a much higher degree of defects than physical mixing, i.e., ID/IG = 0.86 and 0.89, respectively. The wet impregnated samples also had better overall textural properties. For example, for samples activated with 1:1 ratio, the total pore volume was 0.664 vs. 0.637 cm3/g and the surface area was 1191 vs. 1263 m2/g for dry and wet mixed samples, respectively. In the electrochemical application, specifically in supercapacitors, impregnated samples showed a much better capacitance at low current densities, i.e., 247 vs. 146 F/g at the current density of 0.1 A/g. However, the physically mixed samples were more stable after 5000 cycles: 97.8% versus 94.4% capacitance retention for the wet impregnated samples.

Effects of Various Ripening Media on the Mesoporous Structure and Morphology of Hydroxyapatite Powders.

Mesoporous hydroxyapatite (HA) materials demonstrate advantages as catalysts and as support systems for catalysis, as adsorbent materials for removing contamination from soil and water, and as nanocarriers of functional agents for bone-related therapies. The present research demonstrates the possibility of the enlargement of the Brunauer-Emmett-Teller specific surface area (SSA), pore volume, and average pore diameter via changing the synthesis medium and ripening the material in the mother solution after the precipitation processes have been completed. HA powders were investigated via chemical analysis, X-ray diffraction analysis, Fourier-transform IR spectroscopy, transmission electron microscopy (TEM), and scanning (SEM) electron microscopy. Their SSA, pore volume, and pore-size distributions were determined via low-temperature nitrogen adsorption measurements, the zeta potential was established, and electron paramagnetic resonance (EPR) spectroscopy was performed. When the materials were synthesized in water-ethanol and water-acetone media, the SSA and total pore volume were 52.1 m2g-1 and 116.4 m2g-1, and 0.231 and 0.286 cm3g-1, respectively. After ripening for 21 days, the particle morphology changed, the length/width aspect ratio decreased, and looser and smaller powder agglomerates were obtained. These changes in their characteristics led to an increase in SSA for the water and water-ethanol samples, while pore volume demonstrated a multiplied increase for all samples, reaching 0.593 cm3g-1 for the water-acetone sample.

Impact of silica pore structure on the performance of metallocene catalysts in ethylene gas‐phase polymerization

AbstractSeveral commercial silicas were used to support metallocene active centres, and the resulting precatalysts were used to study the impact of the pore size and pore size distribution of the support on the polymerization kinetics and resulting polymer properties. Pore volume distribution played a major role in the fragmentation of silica‐supported catalysts, where mesoporous silicas with a narrow distribution in the region obtained higher activities and faster fragmentation than silicas with a broad pore volume distribution. Therefore, it is shown that care must be taken when using standard information on particle porosity, as this quantity can be misleading. It appears that the minimum pore size, particularly on the particle surface, can be a very important parameter even if it does not impact the estimate of the porosity.

ИССЛЕДОВАНИЕ СТРУКТУРНО-АДСОРБЦИОННЫХ СВОЙСТВ ЦЕОЛИТОВ ЧУГУЕВСКОГО МЕСТОРОЖДЕНИЯ ПРИМОРСКОГО КРАЯ

The results of the study of structural and adsorption properties of zeolites in the Chuguevskoye deposit of Primorsky Krai are presented It was found that the initial samples demonstrate intense reflexes of zeolite corresponding to the heulandite structure. Studies of the thermal resistance of zeolite material have been carried out. It was determined that the intensity of reflexes typical for the heylandite structure remains unchanged up to 900 °C. Scanning electron microscopy methods were used to obtain data on the structure of crystallites and elemental composition of the feed stock. It is shown that the zeolite grain microstructure has clearly distinguishable large crystal agglomerates consisting of strongly aggregated sufficiently large crystallites, each of which has the shape of parallelopiped with a transverse size of about 10 microns. The adsorption-structural characteristics of zeolite are investigated. Based on the data obtained, the specific surface area, total pore volume and mesopore size distribution were found.

In English

Hybrid adsorbents with carbon/silica, carbon/metal oxide/silica, and carbon/metal/silica could be of interest from a practical point of view since they can effectively adsorb both polar and nonpolar compounds. Therefore, mesoporous silica gel Si–60 modified by carbonization acetylacetone or Ti, Zn, Ni, Co, Cr, Zr acetylacetonates has been studied using nitrogen and water adsorption–desorption, thermogravimetry, transmission electron microscopy, X–ray diffraction, and X–ray fluorescence methods. Grafted C/X phases consist of metal compounds (X denotes metal oxide or silicate or/and metal) and char, whose characteristics can be varied changing metal in the precursors and their amounts. The morphological, structural, and textural characteristics of C/X/SiO2, such as composition and particle size distributions of deposits, a number and kind of polar and non polar surface sites, specific surface area, pore volume, and pore size distributions depend on the type, content, and distribution of the C/X deposits. The changes in the grafted matters occur with increasing precursor and C/X concentrations and a possible catalytic effect of the X phases on the carbonization reactions. Appropriate selection of precursor structure and amounts allows one to vary and control the characteristics of whole hybrid adsorbents that is of importance from a practical point of view.

Relationship between pore fluid velocity distribution and pore size distribution

AbstractThis study investigated the normalized velocity magnitude distribution and normalized pore volume distribution in different porous media with porosity between 13.5% and 85%, including sandstones, carbonates, synthetic silica, sphere packings and fiber scaffolds. It was found that both velocity magnitude and pore size follow the same distribution. These results allow the prediction of the velocity distribution in a porous medium when its pore structure is known or tuning the velocity by controlling the pore structure.

Development of Targeted Protein-Displaying Technology with a Novel Carbon Material

This study reports a new carbon material and its specific display of targeted protein. The properties of the carbon materials fabricated with carbon black MOGUL® were analyzed. The carbon materials were spherical structures with 55.421 µm as a median value. The specific surface area, pore volume, average pore diameter, and total of the acidic functional group were 130 m2·g-1, 0.55 cm3·g-1, 17.2 nm, and 0.29 mEq·g-1, respectively. The adsorption-desorption isoform of the carbon materials showed type IV of the hysteresis loop as defined by IUPAC, indicating non-uniform mesoporous structures (2-50 nm). The distribution of the log differential pore volume also indicated non-uniform porous structures because (i) the difference between the average pore size and the most frequent pore size was significant and (ii) the σ value was larger than the average value regarding the pore sizes. However, 10-90% of the integrated values of the log differential pore volume were 57.4% of the total integrated values, and the distribution was similar to the Gauss distribution model. Although the value of the total of the acidic functional group was 2.5-5.4 times lower than the values of the HPLC columns, the carbon materials require good scaffold quality rather than good HPLC quality. Therefore, the amounts could be enough for the scaffold of biotin hydrazide. To demonstrate the property of displaying the targeted proteins, carbon materials displaying biotin hydrazide by covalent bonding were prepared and avidin-labeled horse radish peroxidase (HRP) was bound to the biotin region. The carbon materials were porous structures, so the unspecific adsorption of HRP was estimated. Then, the maintenance ratios of HRP activities were analyzed in the repeated-use-with-wash processes after each evaluation, resulting in the activities of HRP on the carbon materials being treated with biotin hydrazide being significantly maintained compared to that of the ones without biotin hydrazide. The study revealed the properties of the carbon materials and indicated the display of HRP, suggesting that the carbon materials could be a new material for displaying targeted proteins.

TiN doped Ni–Co bimetal organic framework based-composite phase change material with enhanced photothermal conversion performance

Shape stability and excellent photothermal conversion performance are critical for composite PCMs in the field of solar energy utilization. This study prepares a nickel and cobalt-based bimetal organic framework (Ni–Co-BTC) which is further employed as the supporting material for 1-octadecanol (OD). The flower-like Ni–Co-BTC with an interconnected network exhibits large specific surface area, pore volume, and appropriate pore size distribution, which is conducive to the encapsulation of OD (up to 70 wt%). In addition, TiN nanoparticles are added to enhance the photothermal conversion performance of composite PCM. Therefore, the obtained OD/Ni–Co-BTC/TiN composite PCM exhibits considerable thermal energy storage capacity (145.8 J/g) and remarkable photothermal energy conversion efficiency (up to 97.75%). Furthermore, the composite PCM has outstanding thermal stability and reliability, and the phase change enthalpy is reduced by only 1.7% after 100 cycles. Accordingly, the composite PCM shows a promising application potential in solar energy harvesting, conversion and storage. • Bimetal organic framework is used as a novel supporting material for PCM. • The incorporation of Co 2+ improves the loading capacity of Ni–Co-BTC for octadecanol. • OD/NCB/TiN displays high thermal energy storage capacity and thermal reliability. • The photothermal conversion efficiency of OD/NCB/TiN is up to 97.75% by dopping TiN.

The mechanisms study of the effect of sludge hydrolysis residual preparation on the performance of composite phase change materials

Composite phase change materials composed of hydrated salts for heat storage have become a hot research topic, in which the carrier plays a decisive role in preventing phase separation. Little sawdust was mixed into municipal sludge when directly hydrolyzed in an autoclave for the preparation of residual. The separated and dried hydrolysis residue was used as a carrier for loading sodium acetate trihydrate (SAT) with a mass ratio of 1:6 to prepare composite phase change materials (CPCM) for heat storage. The influence of hydrolysis temperature and pressure on the characteristics of the residue carrier and the heat storage performance of CPCM was then investigated. Multiple cycles of melting and solidification were undergone with CPCM in the plastic tube immersed in a water bath. The thermal stability of CPCM was evaluated by the multi-cycle step-cooling curves, DSC, and XRD. The results show that the residue hydrolyzed at 264 °C and 5 MPa (residue R5) has the highest pore volume and uniform particle size distribution compared with the residues hydrolyzed at other conditions. The latent heat storage density of the CPCM-R5 is 256.3 kJ/kg. After 100 melting-solidification cycles, the difference between the latent heat of CPCM-R5 and its theoretical value is only −2.5 %–4.4 %. The XRD patterns of CPCM-R5 are consistent before and after multiple cycles, indicating that CPCM-R5 is of better thermal and chemical stability, and its thermal conductivity is increased.

Reaction-front and char characterization from a palm kernel shell – Oil sludge mixture under oxygen lean regimes in a fixed-bed gasifier

A reaction-front assessment and char characterization of a mixture of oil sludge and palm kernel shell in a fixed-bed reverse-downdraft gasifier using air as the oxidizing agent has been performed. The investigation was focused on assessing the effect of airflow (from 30 up to 60 L/min) on the reaction front as well as on the characterization of char derived from the thermochemical treatment. The thermochemical conversion process was described by output parameters such as fuel consumption rate, flame front velocity (Vff), maximum process temperature (Tmax), air–fuel equivalence ratio, and char yield. The char was characterized regarding its surface structure by determining Brunauer, Emmett, and Teller (BET) surface area, pore volume, and pore size distribution. The results demonstrated that as the airflow rate increased from 30 to 60 L/min, Vff and Tmax augmented from 4.36 to 6.49 mm/min, and from 967 to 1090 °C, respectively, as the process approached a combustion regime. In parallel, the char yield decreased from 13.4 to 4.5 % for the same airflow range due to the higher temperatures, which favors oxidation reactions. The char characterization showed that the BET surface area reached a maximum value of 269.8 m2/g at 50 L/min and subsequently decreased, which was attributed to the thermal deformation of the pore structure as the process temperature increased. Furthermore, pore size distribution showed that the char was mainly composed of micropores. Besides providing useful information related to the operation of gasifiers and char production, this analysis is particularly relevant for solutions aimed at mitigating environmental impacts, as it involves renewable sources and energy recovery.

Strength Analysis of Cement Mortar with Carbon Nanotube Dispersion Based on Fractal Dimension of Pore Structure

Carbon nanotubes (CNTs) are considered among the ideal modifiers for cement-based materials. This is because CNTs can be used as a microfiber to compensate for the insufficient toughness of the cement matrix. However, the full dispersion of CNTs in cement paste is difficult to achieve, and the strength of cement material can be severely degraded by the high air-entraining property of CNT dispersion. To analyze the relationship between the gas entrainment by CNT dispersion and mortar strength, this study employed data obtained from strength and micropore structure tests of CNT dispersion-modified mortar. The fractal dimensions of the pore volume and pore surface, as well as the box-counting dimension of the pore structure, were determined according to the box-counting dimension method and Menger sponge model. The relationship between the fractal dimensions of the pore structure and mortar strength was investigated by gray correlation. The results showed that the complexity of the pore structure could be accurately reflected by fractal dimensions. The porosity values of mortar with 0.05% and 0.5% CNT content were 15.5% and 43.26%, respectively. Moreover, the gray correlation between the fractal dimension of the pore structure and strength of the CNT dispersion-modified mortar exceeded 0.95. This indicated that the pore volume distribution, roughness, and irregularity of the pore inner surface were the primary factors influencing the strength of CNT dispersion-modified mortar.

The microstructure evolution of ballastless track high-strength concrete exposed to compressive and flexural fatigue loads

X-ray micro-CT method was applied to reveal the microstructure evolution of ballastless track high-strength concrete under fatigue loads. The CT image, porosity, pore volume distribution and aspect ratio of pores were analyzed. Results show that a visible crack is formed at stage II when concrete is under compressive fatigue loads. However, the pores around the interface transfer zone of compressive zone concrete are connected at stage III for concrete under flexural fatigue loads. As the microstructure of concrete is damaged and the single pores tend to be connected, the aspect ratio of pores is generally decreased during fatigue damage.

Activated carbon fiber derived from wasted coal liquefaction residual for CO2 capture

Wasted coal liquefaction residual was used to synthesize activated carbon fibers (ACFs) for CO2 capture, and the properties of the developed ACFs were optimized by adjusting the activation conditions, including the reaction temperature and soaking time. The yield, element distribution, pore structure, composition, functional group, morphology, and adsorption capacity of the as-synthesized ACFs were characterized by various apparatuses. In addition, static and dynamic adsorption experiments were conducted to investigate the adsorption capacity of CO2 in flue gas. The results revealed that the synthesized ACFs are mainly composed of carbon, accounting for more than 90% of the total elements. The specific surface area, pore volume, and pore width distribution of the prepared ACFs were optimized by changing the activation conditions, and ACFs with a specific surface area higher than 1400 m2/g were successfully developed by activation at 950 for 3 h. The amount of micropores occupied more than 90% of the total pore volume. The pore width distribution dominated by micropores is beneficial for CO2 adsorption since the diameter of CO2 is 0.33 nm. From FTIR and XPS analysis, it is found that the main structure of ACFs is a carbon skeleton composed of polycyclic aromatic hydrocarbons with a small number of oxygen-containing functional groups. The adsorption isotherm of ACFs for CO2 conforms to the Langmuir model, indicating that the adsorption process of CO2 by ACFs can be attributed to monolayer adsorption. Both the specific surface area and oxygen-containing functional groups have crucial effects on the adsorption capacity of CO2. The dynamic adsorption experiment determined that ACFs-920-3 had the highest adsorption capacity for CO2 in flue gas, and adsorption equilibrium was achieved after 7 min of adsorption. The adsorption process of CO2 in flue gas by the as-synthesized ACFs fits well with the pseudosecond kinetic model. The CO2 adsorption capacity of the obtained ACFs remained unchanged after 10 cycles of adsorption. A high-value-added route for synthesizing ACFs for CO2 capture using CLR as a raw material was developed.