Amount Of Adsorbed CO Research Articles

Preparation and CO2 breakthrough adsorption of MIL-101(Cr)-D composites

Materials Institute Lavoisier-101-D (MIL-101(Cr)-D) composites were first successfully synthesized by traditional solvent hydrothermal synthesis method. The effect of MIL-101(Cr) which was modified by DEA on CO2 adsorption was studied and characterized by XRD, TGA, FT-IR, N2 adsorption technique, and SEM. In order to compare the CO2 adsorption of MIL-101(Cr) and MIL-101(Cr)-D composites, CO2 fixed-bed adsorption experiment had been performed. The results demonstrated that MIL-101(Cr)-D-0.24 had the best CO2 adsorption performance and was 33.3% higher than the unmodified one. The characterization results also confirmed that MIL-101(Cr)-D-0.24 had the largest specific surface area and specific pore volume. The SEM images showed that with the increase of DEA grafting, the unit cell could not continue to maintain the octahedral structure. The amount of CO2 adsorption of MIL-101(Cr)-D was also reduced which was caused by the collapse of the pore structure. The grafting of DEA did not affect the thermal stability of MIL-101(Cr).

Co2 Separation from Ambient Air by Novel CeO2-Based Adsorbent

CO2 direct air capture is a process for CO2 negative emission to prevent global warming. To consider an application for CO2 direct air capture using temperature swing adsorption process, CeO2-based and zeolite-based adsorbent were investigated for their CO2 adsorption and desorption characteristics under atmospheric conditions. The CeO2-based adsorbent exhibited a larger CO2 adsorption amount than zeolite-based adsorbents at atmospheric CO2 concentration under dry conditions. Remarkably, under wet conditions, the CO2 adsorption amount of the CeO2-based adsorbent remained large while the zeolite-based adsorbents exhibited almost no CO2 adsorption. A CO2 adsorption isotherm study revealed that CO2 adsorption of the CeO2-based adsorbent was stable at a low CO2 partial pressure, indicating strong CO2 chemical adsorption. The CO2 desorption of the CeO2-based adsorbent was observed at relatively low temperatures below 200 °C under both dry and wet conditions. The CO2 desorption temperature under dry conditions was lower than that under wet conditions. In situ Fourier transform infrared spectroscopy indicated that in spite of the different CO2 desorption temperatures, the CO2 adsorbed on the CeO2 formed bidentate carbonate species under both dry and wet conditions. Temperature dependence analysis of the spectra revealed that CO2 desorption was accelerated under wet conditions after liquid H2O desorption occurred, indicating that CO2 and H2O had an attractive interaction, which led to a higher CO2 desorption temperature.

Displacement behaviors of adsorbed coalbed methane on coals by injection of SO2/CO2 binary mixture

Direct injection of oxy-coal combustion flue gas into coal reservoirs is viable to mitigate CO2, SO2 and NOx emissions, with the simultaneous benefit to improve coalbed methane (CH4) recovery. To study the feasibility of this technology, the displacement process of adsorbed CH4 on coals by SO2/CO2 binary mixture injection, termed as SO2/CO2-ECBM, was investigated in laboratory. The results show that the adsorption amount of CO2 on coals at displacement equilibrium state for SO2/CO2 injection slightly decreases compared with that for pure CO2 injection. The total adsorption amount of SO2/CO2/CH4 shows approximate linear correlation with coals' micropore parameters. However, a downward parabolic relation is found between the adsorption amount of CO2 and micropore parameters. In comparison with CO2 injection, the molar composition of CH4 in the bulk phase rises while that in the adsorbed phase drops at displacement equilibrium state for SO2/CO2 injection. All these changes in molar compositions of CH4 in the two phases lead to more CH4 molecules desorption from coal matrix, and demonstrate that implementing SO2/CO2-ECBM can achieve superior CH4 recovery. XPS characterizations confirm that the injected SO2 contained in SO2/CO2 occupying the oxygen-containing functional groups, i.e. C–O and CO on coals, is the main interaction mechanism between SO2 and coals. This chemisorption effect may account for the enhanced CH4 recovery via SO2/CO2 injection. To summarize, injection of SO2/CO2 rather than CO2 into coal seams has potential to generate higher CH4 recovery and mitigate SO2 and CO2 emissions into the atmosphere.

Three novel topologically different metal-organic frameworks built from 3-nitro-4-(pyridin-4-yl)benzoic acid.

The design and synthesis of metal-organic frameworks (MOFs) have attracted much interest due to the intriguing diversity of their architectures and topologies. However, building MOFs with different topological structures from the same ligand is still a challenge. Using 3-nitro-4-(pyridin-4-yl)benzoic acid (HL) as a new ligand, three novel MOFs, namely poly[[(N,N-dimethylformamide-κO)bis[μ2-3-nitro-4-(pyridin-4-yl)benzoato-κ3O,O':N]cadmium(II)] N,N-dimethylformamide monosolvate methanol monosolvate], {[Cd(C12H7N2O4)2(C3H7NO)]·C3H7NO·CH3OH}n, (1), poly[[(μ2-acetato-κ2O:O')[μ3-3-nitro-4-(pyridin-4-yl)benzoato-κ3O:O':N]bis[μ3-3-nitro-4-(pyridin-4-yl)benzoato-κ4O,O':O':N]dicadmium(II)] N,N-dimethylacetamide disolvate monohydrate], {[Cd2(C12H7N2O4)3(CH3CO2)]·2C4H9NO·H2O}n, (2), and catena-poly[[[diaquanickel(II)]-bis[μ2-3-nitro-4-(pyridin-4-yl)benzoato-κ2O:N]] N,N-dimethylacetamide disolvate], {[Ni(C12H7N2O4)2(H2O)2]·2C4H9NO}n, (3), have been prepared. Single-crystal structure analysis shows that the CdII atom in MOF (1) has a distorted pentagonal bipyramidal [CdN2O5] coordination geometry. The [CdN2O5] units as 4-connected nodes are interconnected by L- ligands to form a fourfold interpenetrating three-dimensional (3D) framework with a dia topology. In MOF (2), there are two crystallographically different CdII ions showing a distorted pentagonal bipyramidal [CdNO6] and a distorted octahedral [CdN2O4] coordination geometry, respectively. Two CdII ions are connected by three carboxylate groups to form a binuclear [Cd2(COO)3] cluster. Each binuclear cluster as a 6-connected node is further linked by acetate groups and L- ligands to produce a non-interpenetrating 3D framework with a pcu topology. MOF (3) contains two crystallographically distinct NiII ions on special positions. Each NiII ion adopts an elongated octahedral [NiN2O4] geometry. Each NiII ion as a 4-connected node is linked by L- ligands to generate a two-dimensional network with an sql topology, which is further stabilized by two types of intermolecular OW-HW...O hydrogen bonds to form a 3D supramolecular framework. MOFs (1)-(3) were also characterized by powder X-ray diffraction, IR spectroscopy and thermogravimetic analysis. Furthermore, the solid-state photoluminescence of HL and MOFs (1) and (2) have been investigated. The photoluminescence of MOFs (1) and (2) are enhanced and red-shifted with respect to free HL. The gas adsorption investigation of MOF (2) indicates a good separation selectivity (71) of CO2/N2 at 273 K (i.e. the amount of CO2 adsorption is 71 times higher than N2 at the same pressure).

Synthesis of Nitrogen and Sulfur Codoped Nanoporous Carbons from Algae: Role in CO2 Separation.

Nitrogen and sulfur codoped and completely renewable carbons were synthesized from two types of algae, Spirulina Platensis and Chlorella Vulgaris, without any additional nitrogen fixation reaction. The type of activation agents, char-forming temperature, activation agent-to-char ratio, and activation temperature were all varied to optimize the reaction conditions for this synthesis. The maximum Brunauer–Emmett–Teller surface area and total pore volumes of the carbons were 2685 m2/g and 1.4 cm3/g, respectively. The nitrogen and sulfur contents of the carbons were in the range of 0.9–5.69 at. % and 0.05–0.2 at. %, respectively. The key nitrogen functionalities were pyridinic, amino, and pyridonic/pyrrolic groups, whereas the key sulfur functionalities were S–C, O–S–C, and SOx groups. CO2 adsorption isotherms were measured at 273, 298, and 313 K, and the ideal adsorbed solution theory was employed to calculate the selectivity of adsorption of CO2 over N2 and simulate binary adsorption isotherms. The adsorption results demonstrated that the CO2 adsorption amount and the heat of CO2 adsorption were higher for carbons with higher nitrogen content, confirming the influence of nitrogen functionality in CO2 adsorption. The overall results suggested that these algae-derived renewable carbons can serve as potential adsorbents for CO2 separation from N2.

Prediction of Carbon Dioxide Adsorption via Deep Learning.

Porous carbons with different textural properties exhibit great differences in CO2 adsorption capacity. It is generally known that narrow micropores contribute to higher CO2 adsorption capacity. However, it is still unclear what role each variable in the textural properties plays in CO2 adsorption. Herein, a deep neural network is trained as a generative model to direct the relationship between CO2 adsorption of porous carbons and corresponding textural properties. The trained neural network is further employed as an implicit model to estimate its ability to predict the CO2 adsorption capacity of unknown porous carbons. Interestingly, the practical CO2 adsorption amounts are in good agreement with predicted values using surface area, micropore and mesopore volumes as the input values simultaneously. This unprecedented deep learning neural network (DNN) approach, a type of machine learning algorithm, exhibits great potential to predict gas adsorption and guide the development of next-generation carbons.

Prediction of Carbon Dioxide Adsorption via Deep Learning

AbstractPorous carbons with different textural properties exhibit great differences in CO2 adsorption capacity. It is generally known that narrow micropores contribute to higher CO2 adsorption capacity. However, it is still unclear what role each variable in the textural properties plays in CO2 adsorption. Herein, a deep neural network is trained as a generative model to direct the relationship between CO2 adsorption of porous carbons and corresponding textural properties. The trained neural network is further employed as an implicit model to estimate its ability to predict the CO2 adsorption capacity of unknown porous carbons. Interestingly, the practical CO2 adsorption amounts are in good agreement with predicted values using surface area, micropore and mesopore volumes as the input values simultaneously. This unprecedented deep learning neural network (DNN) approach, a type of machine learning algorithm, exhibits great potential to predict gas adsorption and guide the development of next‐generation carbons.

Enhanced CO2 Adsorption on Activated Carbon‐Modified HKUST‐1 Composites

AbstractMesoporous activated carbon (AC)‐modified HKUST‐1 composites with different AC contents were prepared and were used for CO2 adsorption. The structure and physiochemical properties of the composites were characterized by scanning electron microscopy(SEM), X‐ray diffractometer(XRD), thermogravimetry(TG) and nitrogen adsorption techniques. The results showed that the surface area and micro pore volume for the HKUST‐1@AC composites increase obviously compared to the HKUST‐1. Especially, the HKUST‐1@AC/2% gave the maximum specific surface area of 1145.71 m2/g and micropore volume of 0.4363 mL/g, resulting in highest CO2 adsorption capacity of 155.7 mg/g, which is almost two times than that of the unmodified HKUST‐1. The content of oxygen‐containing functional groups in AC also play an important role in CO2 adsorption for the HKUST‐1@AC/2% composites, and the optimum content of oxygen‐containing functional groups for the coconut shell AC is about 2.9 mg/g. This might be due to that HKUST‐1 grows along the surface of AC with rich oxygen‐containing functional groups, and a large number of micropores are formed between the two interfaces, therefore increasing CO2 adsorption amount.

Assembly of Zeolite-like Metal-Organic Framework: An Indium-ZMOF Possessing GIS Topology and High CO2 Capture.

An In-ZMOF material, [(CH3)2NH2][In(ABTC)]·3DMF (JLU-MOF52), has been synthesized by using 2,2',5,5'-azobenzenetetracarboxylic acid (H4ABTC) as a linker, which coordinated to four [In(O2C)4]- secondary building units (SBUs) to generate a 3D framework. JLU-MOF52 is constructed by a rare 4 + 4 strategy from 4-connected tetrahedral [In(O2C)4]- SBUs and tetrahedral ligands, which can be described as a (4, 4)-connected and forbidden interpenetrated zeolite-like MOF with GIS topology. The framework exhibits significant advantages in terms of chemical stability. N2 adsorption study of the activated JLU-MOF52 material reveals a Langmuir and a BET surface area is 1302 and 966 m2 g-1, respectively. Furthermore, the adsorption amount of CO2 for JLU-MOF52 is studied under 1 atm, which exhibits the highest CO2 capture ability at 273 K among the ZMOFs materials with GIS topology. These characteristics make JLU-MOF52 promising candidate materials for application in moderating increasing atmospheric CO2 levels.

Creviced titanate nanotube modified with stearyl trimethyl ammonium bromide as a support for amine-based CO2 sorbent

In this paper, a series of protonated titanate nanotubes (PTNTs) modified by stearyl trimethyl ammonium bromide (STAB) were prepared as supports for Polyethyleneimine (PEI)-based sorbents. The CO2 adsorption performance was evaluated in a self-assembled fixed bed reactor. The typical sorbents were characterized by XRD, EDS, SEM, HR-TEM, N2 adsorption-desorption, FT-IR and TGA. Results indicate that the modification significantly improves CO2 adsorption capacity of the sorbents. The maximum CO2 adsorption amount of 2.22 mmol/g was obtained over the modified PEI-based sorbent in 2% CO2/air. Based on the characteristic analysis, the formation of creviced nanotubes, instead of intact nanotubes, is testified because of the modification. Such unique nanotubes possess the higher BET surface area and larger pore volume, which enables more PEI to uniformly distribute on the surface of modified PTNT supports. Especially, it is easier for PEI to enter the inner pores through the crevice than from tube orifices, avoiding pore blockage and facilitating CO2 diffusion in pores. The abundant amine-sites and small internal diffusion resistance endow the modified sorbent with large CO2 adsorption capacity. In addition, the PEI/PTNT adsorbent displays good thermal stability and reusability.

Adsorption Properties of N2, CH4, and CO2 on Sulfur-Doped Microporous Carbons

A series of sulfur-doped microporous carbon materials were prepared by directly using potassium hydroxide as the activating agent. The specific surface area and pore volume of the sample CKS-5 (activated at 800 °C for 180 min according to an alkali/carbon ratio of 4:1) reached 2088 m2/g and 1.240 cm3/g, respectively. The adsorption isotherms of N2, CH4, and CO2 on five samples were determined by a volumetric method to obtain insight into the relationship between adsorption performance and porosity. CSK-5 with a developed pore structure exhibited a higher adsorption amount of CO2 and CH4 at high pressure. For the selectivity, the CS sample presented the highest selectivity for CO2/CH4, of which the selectivity of separation reached as high as 5.86. The highest selectivity of separation of CH4/N2 (3.644) was present on CSK-7.

High Water Tolerance of a Core-Shell-Structured Zeolite for CO2 Adsorptive Separation under Wet Conditions.

Dehumidification in CO2 adsorptive separation processes is an important issue, owing to its high energy consumption. However, available adsorbents such as low-silica zeolites show a significant decrease in CO2 adsorption capacity when water vapor is present. A core-shell-structured MFI-type zeolite with a hydrophilic ZSM-5 coated with a hydrophobic silicalite-1 shell layer was applied in CO2 adsorptive separation under wet conditions. This hybrid material demonstrated remarkably high water tolerance with stable CO2 adsorption performance without additional thermal treatment for regeneration, whereas a significant decrease in the CO2 adsorption amount because of water vapor was observed on the parent ZSM-5. The core-shell structure of zeolites with high pore volumes, such as LTA or CHA, could also be suitable candidates for high CO2 adsorption capacity and high water tolerance for practical applications.

Low Temperature CO Hydrogenation to Ethanol in Liquid Phase over CuZn Catalyst

A series of CuZn catalysts with different pH values and molar ratios of Cu to Zn were prepared and tested for the CO hydrogenation to ethanol at low temperature in liquid phase. The results showed that the pH value and molar ratio of Cu to Zn of CuZn catalysts greatly affected the structure and CO adsorption properties. Catalytic performance had a direct relation with CO adsorption. The catalytic activity was determined by the total amount of CO adsorption over the catalyst surface, the weak CO adsorption accounted for the methanol synthesis, while the strong CO adsorption accounted for the ethanol synthesis. A reaction mechanism was also proposed.

Effect of Preparation Method on the Structure and Catalytic Performance of CuZnO Catalyst for Low Temperature Syngas Hydrogenation in Liquid Phase

CuZnO catalysts were prepared by different methods, characterized by applying a combination of techniques, and the effect of preparation method on the structure and the catalytic performance for syngas hydrogenation at low temperature in liquid phase was investigated. The results showed that due to the difference of the interaction between Cu and Zn, the preparation method greatly affected the crystallinity of CuZnO. The crystallinity of CuZnO had a direct relation with the CO adsorption property. The total CO adsorption amount determined the catalytic activity, the weak adsorption of CO accounted for the methanol synthesis, while the strong adsorption of CO accounted for the ethanol synthesis. CuZnO prepared by the homogeneous precipitation with the lowest crystallinity exhibited the highest total carbon conversion of 68.6% with the methanol selectivity of 84.9%, while CuZnO prepared by the sol gel with the highest crystallinity exhibited the highest ethanol selectivity of 47.6%. The preparation method of CuZnO had a significant effect on the CO adsorption property and then resulted in a substantial modification in the product distribution for the syngas hydrogenation at low temperature in liquid phase. The catalytic activity was determined by the total amount of CO adsorption, the weak CO adsorption accounted for the methanol synthesis and the strong CO adsorption accounted for the ethanol synthesis.

Characteristics of CO2/supercritical CO2 adsorption-induced swelling to anthracite: An experimental study

Abstact Coal reservoirs especially deep unminable coal reservoirs, are viable geological target formations for CO2 storage to mitigate greenhouse gas emissions. However, CO2 storage in deep coal seam faces many difficulties, such as low initial injectivity and further permeability loss during injection, induced by the volumetric swelling effects of coal. This paper presents a set of measurements on anthracite cores exposed to CO2/supercritical CO2 (ScCO2) under temperature and pressure condition. Testing includes the measurements of CO2 adsorption amount and volumetric swelling ratio, and these measurements are conducted by a novel experimental apparatus, which design base on the methodology of coal swelling-induced confining pressure liquid flowing. Noteworthy, we have measured the CO2 adsorption-induced swelling to anthracite cores at temperatures between 35 °C and 55 °C and adsorption equilibrium pressures up to 9.3 MPa. The results indicate that the anthracite in Qinshui basin capable of adsorbing a large amount of CO2 then inducing a large swelling ratio, the absolute adsorption amount is between 54.4 mL/g and 69.5 mL/g, and swelling ratio is between 2.32% and 3.45%. The Langmuir-like equation is not suit to the data fitting between excess adsorption amount and adsorption equilibrium pressure. The growth of micropores and ultramicro-fracture increase the specific surface area of anthracite for adsorbing CO2. The apparatus, by the liquid-displacement method, capable of directly observing CO2/ScCO2 adsorption-induced swelling to the whole anthracite core, which reduces the effect of heterogeneous minerals distribution on the swelling measurement.

Competitive adsorption behaviors of carbon dioxide and n-dodecane mixtures in 13X molecular sieve

The CO2 cyclic injection has been proven to be effective to enhance tight oil recovery under constant reservoir temperature and down hole pressure conditions. However, the enhance tight oil recovery mechanism was unclear, especially the adsorption of the CO2 and alkane in the surface. Therefore, it is great important to study the adsorption mechanism of CO2 and alkane mixtures in tight oil. In this study, a new experimental method and apparatus have been designed to test the change of the mole fraction of CO2 and n-C12 before and after the adsorption equilibrium. Then, the adsorption amount of CO2 and n-C12 was obtained by a mathematical method. Moreover, the adsorption character of CO2 and n-C12 mixtures in 13X molecular sieve and the effect of pressure on the adsorption and amount were studied. The results show that the adsorption of CO2 and the desorption of n-C12 follow the Langmuir adsorption. This study provides a straightforward method to experimentally determine the adsorption properties of the tight oil, which can be used to evaluate enhanced tight oil recovery by CO2 injection.

Experimental adsorption isotherms of CO2 and CH4 on STT zeolite: comparison with high- and pure-silica zeolites

Adsorption isotherms of CO2 and CH4 on a high-silica STT zeolite (Si/Al = 27), an odd zeolite which consists of 7- and 9-MR window openings, were measured over pressure range of 0–100 kPa at temperatures 298, 323 and 348 K. The isotherms follow typical Type-I according to the BDDT classification. Experimental isotherms data of CH4 and CO2 are well described by Langmuir-type isotherms. Calculation of isosteric heats of adsorption along with the isotherms types revealed that CH4 adsorption system is energetically homogeneous while that is heterogeneous for CO2 adsorption. Furthermore, comparison of STT adsorptive performance with high- and pure-silica zeolites led to development of a trade-off plot, i.e. CO2/CH4 selectivity against CO2 adsorption, by ideal adsorbed solution theory (IAST) calculations. The results revealed that Silicalite-1 has the lowest CO2/CH4 selectivity while SSZ-45 is the most selective adsorbent. Additionally, DD3R has the minimum CO2 adsorption amount whereas STT has the highest capacity. CO2/CH4 selectivity of STT is just ~ 12% smaller than that of SSZ-45 (13.30 against 15.12) but its CO2 adsorption is 63% greater than that of SSZ-45 (1.42 against 0.867 mol kg−1). Thus, STT zeolite is superior to the other high- and pure silica zeolite as it has simultaneously both high selectivity and capacity in CO2/CH4 separation.

Solvent Effect Inside the Nanocage of Zeolite Catalysts: A Combined Solid-State NMR Approach and Multiscale Simulation

Solvent effect plays an important role in manipulating the chemical reactivity, equilibrium constant, and reaction rate. Such effect is observed in heterogeneous catalysis, especially for the acidic zeolite catalyst with molecularly size pores (≤1 nm). Nevertheless, it is a great challenge to systematically investigate the intermolecular interaction and the mechanism of solvent effect on the catalytic performance inside the acidic zeolite nanocages. Here, we used the state-of-the-art solid-state NMR (SSNMR) experimental techniques combined with multiscale theoretical simulations to quantitatively investigate the solvent effect on the reactant electronic property and reaction activity. In particular, a series of 13C CP/MAS solid-state NMR experiments with acetone probe for H-ZSM-5 zeolite were performed via changing the coadsorption amount of nitromethane solvent. It is found that the solvent effect accounts for the enhancement of the apparent Bronsted acidic strength of zeolite catalysts, and thus promote...

High CO2 adsorption capacities in UiO type MOFs comprising heterocyclic ligand

For equilibrium-based CO2 capture, a high CO2 adsorption amount and working capacity of adsorbents to fulfill different conditions are desired. In this work, we investigated the CO2 adsorption in four UiO type MOFs comprising N, S, and O heterocyclic ligands. Our grand canonic Monte Carlo (GCMC) simulation results show that the CO2 adsorption amount in MOFs comprising N (UiO(BPYDC)), S (Zr-BTDC), and O (Zr-BFDC) heterocyclic ligands is higher than that in their parent MOF, UiO-67. The MOFs comprising O-heterocyclic ligand (Zr-BFDC) shows the highest CO2 adsorption amount, which is 4 times higher than that of UiO-67 at 1 bar. In addition, we also found that by changing the heteroatoms on the ligands, the CO2 working capacity can be precisely tuned. For post-combustion CO2 capture, Zr-BFDC shows the highest working capacity due to the relative steepness isotherms. However, for syngas purification, due to the higher partial pressure of CO2, the relative steepness of the CO2 isotherms for Zr-BFDC is less of an advantage, resulting in working capacities that are less than those of Zr-BTDC and UiO(BPYDC). For biogas stream purification, UiO(BPYDC) shows the highest working capacity. Furthermore, density functional theory (DFT) calculations revealed that the incorporation of heteroatoms alters the distribution of charge in the system, introducing regions of negative charge around heteroatoms, leading to enhanced interactions between framework atoms and CO2 molecules.

Synthesis of porous polymer based solid amine adsorbent: Effect of pore size and amine loading on CO2 adsorption

A series of porous polymers was synthesized by a suspension polymerization of divinylbenzene (DVB) and ethylene glycol dimethyl acrylate (EGDMA), which was further functionalized with polyethyleneimine (PEI) for CO2 capture. The results showed that the synthesized DVB and EGDMA (DE) copolymers were an effective support for loading PEI because of its larger pore size and specific surfaces area. It was found that DE (30, 10) loaded with 30wt% PEI exhibited a higher CO2 adsorption amount of 3.28mmol/g at 25°C under dry condition. The CO2 adsorption capacity would decline gradually as the temperature continuously raised, for the reaction between CO2 and amine groups was an exothermic reaction. The kinetics study showed that Avrami kinetic model could accurately describe the whole CO2 adsorption process, suggesting that both physical adsorption and chemical adsorption were involved with the CO2 adsorption process. The intraparticle diffusion and Boyd’s film diffusion models were applied to investigate the CO2 diffusion mechanism, the intraparticle diffusion model could well distinguish the rate-limiting step during CO2 adsorption process. This solid amine adsorbent could be regenerated with nitrogen stream at 75°C, and it kept stable CO2 adsorption capacity after eight adsorption-desorption cycles. All these features indicated that this porous polymer based adsorbent has a high potential for CO2 capture and separation from flue gas.