Effect of the Presence of Water-soluble Amines on the Carbon Dioxide (CO2) Adsorption Capacity of Amine-grafted Poly-succinimide (PSI) Adsorbent During CO2 Capture

Upgrading raw biogas to methane (CH4) is a vital prerequisite for the utilization of biogas as a vehicle fuel or the similar field as well. In this work, biogas yield from the anaerobic fermentation of food waste containing methane (CH4, 60.4%), carbon dioxide (CO2, 29.1%), hydrogen sulfide (H2S, 1.5%), nitrogen (N2, 7.35%) and oxygen (O2, 1.6%) was upgraded by dynamic adsorption. The hydrogen sulfide was removed from the biogas in advance by iron oxide (Fe2O3) because of its corrosion of the equipment. Commercial 13X zeolite and carbon molecular sieve (CMS) were used to remove the other impurity gases from wet or dry biogas. It was found that neither 13X zeolite nor CMS could effectively remove each of the impurities in the wet biogas for the effect of water vapor. However, 13X zeolite could effectively remove CO2 after the biogas was dried with silica and showed a CO2 adsorption capacity of 78 mg/g at the condition of 0.2 MPa and 25 °C. Additionally, 13X zeolite almost did not adsorb nitrogen (N2), so the CH4 was merely boosted to ac. 91% after the desulfurated dry biogas passed through 13X zeolite, nitrogen remaining in the biogas. CMS would exhibit superior N2 adsorption capacity and low CO2 adsorption capacity if some N2 was present in biogas, so CMS was able to remove all the nitrogen and fractional carbon dioxide from the desulfurated dry biogas in a period of time. Finally, when the desulfurated dry biogas passed through CMS and 13X zeolite in turn, the N2 and CO2 were sequentially removed, and then followed the high purity CH4 (≥96%).

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CVD Synthesis, Functionalization and CO2 Adsorption Attributes of Multiwalled Carbon Nanotubes

Processes ◽

10.3390/pr7090634 ◽

2019 ◽

Vol 7 (9) ◽

pp. 634 ◽

Cited By ~ 3

Author(s):

Shazia Shukrullah ◽

Muhammad Yasin Naz ◽

Norani M. Mohamed ◽

Khalid A. Ibrahim ◽

Nasser M. AbdEl-Salam ◽

...

Keyword(s):

Carbon Dioxide ◽

Carbon Nanotubes ◽

Adsorption Capacity ◽

Multiwalled Carbon Nanotubes ◽

Functional Groups ◽

Co2 Adsorption ◽

Breakthrough Curves ◽

Multiwalled Carbon ◽

Amine Functionalized ◽

Co2 Adsorption Capacity

Carbon dioxide is one of the major greenhouse gases and a leading source of global warming. Several adsorbent materials are being tested for removal of carbon dioxide (CO2) from the atmosphere. The use of multiwalled carbon nanotubes (MWCNTs) as a CO2 adsorbent material is a relatively new research avenue. In this study, Fe2O3/Al2O3 composite catalyst was used to synthesize MWCNTs by cracking ethylene gas molecules in a fluidized bed chemical vapor deposition (CVD) chamber. These nanotubes were treated with H2SO4/HNO3 solution and functionalized with 3-aminopropyl-triethoxysilane (APTS). Chemical modification of nanotubes removed the endcaps and introduced some functional groups along the sidewalls at defected sites. The functionalization of nanotubes with amine introduced carboxylic groups on the tube surface. These functional groups significantly enhance the surface wettability, hydrophilicity and CO2 adsorption capacity of MWCNTs. The CO2 adsorption capacity of as-grown and amine-functionalized CNTs was computed by generating their breakthrough curves. BELSORP-mini equipment was used to generate CO2 breakthrough curves. The oxidation and functionalization of MWCNTs revealed significant improvement in their adsorption capacity. The highest CO2 adsorption of 129 cm3/g was achieved with amine-functionalized MWCNTs among all the tested samples.

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Enhanced CO2 adsorption capacity of amine-functionalized MIL-100(Cr) metal–organic frameworks

CrystEngComm ◽

10.1039/c4ce01265h ◽

2015 ◽

Vol 17 (2) ◽

pp. 430-437 ◽

Cited By ~ 29

Author(s):

Carlos Palomino Cabello ◽

Gloria Berlier ◽

Giuliana Magnacca ◽

Paolo Rumori ◽

Gemma Turnes Palomino

Keyword(s):

Carbon Dioxide ◽

Adsorption Capacity ◽

Co2 Adsorption ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Sorption Properties ◽

Amine Functionalized ◽

Carbon Dioxide Sorption ◽

Metal Organic ◽

Co2 Adsorption Capacity

Functionalization of the MIL-100(Cr) metal–organic framework with alkylamines (ethylenediamine and N,N′-dimethylethylenediamine) improves carbon dioxide sorption properties, especially in the case of ethylenediamine.

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Taming Structure and Modulating Carbon Dioxide (CO2) Adsorption Isosteric Heat of Nickel-based Metal Organic Framework (MOF-74(Ni)) for Remarkable CO2 Capture

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2021.12.163 ◽

2021 ◽

Author(s):

Lei Lei ◽

Yan Cheng ◽

Changwei Chen ◽

Mohammadreza Kosari ◽

Zeyu Jiang ◽

...

Keyword(s):

Carbon Dioxide ◽

Co2 Capture ◽

Co2 Adsorption ◽

Metal Organic Framework ◽

Isosteric Heat ◽

Metal Organic ◽

Carbon Dioxide Co2 ◽

Organic Framework

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Carbon Dioxide Capture at Various Temperatures Using Ca(OH)2 Sorbent Fabricated by Sol-Gel Route in Ethanol Media

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1024.35 ◽

2014 ◽

Vol 1024 ◽

pp. 35-38

Author(s):

Farah Diana Mohd Daud ◽

Srimala Sreekantan ◽

Abdul Rahman Mohamed

Keyword(s):

Carbon Dioxide ◽

Co2 Capture ◽

Co2 Adsorption ◽

Sol Gel ◽

Morphological Properties ◽

Before And After ◽

Different Temperatures ◽

Carbon Dioxide Co2 ◽

Co2 Capture Capacity ◽

Double Hydroxides

Carbon dioxide (CO2) is considered to be the main greenhouse gas contributing to global warming and climate change. Therefore, the present paper investigates the CO2-capture performance of synthesized calcium hydroxides, Ca(OH)2 sorbent at different temperatures which are 350, 450, 550 and 650°C. The CO2 adsorption of the materials synthesized was studied in a thermo-gravimetric analyzer (TGA). The CO2 adsorption temperature strongly influenced the capture performance of the absorbent. The Ca(OH)2 sorbent are prepared by hydrolysis of calcium alkoxides, NaOH as precipitating agent and mixed solvent of ethanol with deionized (DI) water as medium at 35°C. X- ray diffraction (XRD) result showed 40 nm crystallite size of Ca(OH)2 hexagonal crystal structures. The Ca(OH)2 particle size and morphological properties before and after CO2 adsorption are studied by Field Emission Scanning Electron Microscopy (FESEM). The FESEM image indeed showed the rod like shape of Ca(OH)2 structures with rod length increased from 765 to 893 nm while the diameter is between 140 to 160 nm. When Ca(OH)2 sorbent adsorbed CO2, the structures are rigid interconnected each others like a lump shaped. The prepared Ca(OH)2 sorbent possesses a great potential to capture CO2 when increased temperature. Nevertheless, at intermediate temperatures (350-450°C), Ca(OH)2 sorbent still demonstrates a higher CO2 capture capacity than other intermediate temperature adsorbents such as layered double hydroxides (LDHs), lithium zirconates (LiZrO3) and hydrotalcites.

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A comparison of CO2 adsorption behaviour of mono- and diamine-functionalised adsorbents

E3S Web of Conferences ◽

10.1051/e3sconf/20199001010 ◽

2019 ◽

Vol 90 ◽

pp. 01010 ◽

Cited By ~ 3

Author(s):

Noor Ashikin Mohamad ◽

Ebrahim Abouzari Lotf ◽

M. Nasef Mohamed ◽

Ahmad Arshad ◽

TAT Abdullah

Keyword(s):

Electron Microscopy ◽

Adsorption Capacity ◽

Co2 Adsorption ◽

Morphological Changes ◽

Adsorption Behaviour ◽

X Ray Diffraction ◽

X Ray ◽

Co2 Adsorption Capacity ◽

Carbon Dioxide Co2 ◽

Scanning Electron

The paper presents a study for investigating i) the effect of amination of poly(GMA)-grafted polyethylene/polypropylene (PE/PP) substrates with trimethylamine (TMA) and ethylenediamine (EDA) and ii) their impact on carbon dioxide (CO2) adsorption capacity of the obtained adsorbents. The chemical, structural, and morphological changes of the aminated adsorbents were evaluated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM), respectively. The amination yield with TMA was 40% higher than EDA. However, the obtained adsorbent showed two times lower CO2 adsorption capacity (at 30 bars) than the adsorbent with EDA and stood at 0.6 mmol g-1 compared to 1.2 mmol g-1.

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Nitriding an Oxygen-Doped Nanocarbonaceous Sorbent Synthesized via Solution Plasma Process for Improving CO2 Adsorption Capacity

Nanomaterials ◽

10.3390/nano9121776 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1776

Author(s):

Phuwadej Pornaroontham ◽

Gasidit Panomsuwan ◽

Sangwoo Chae ◽

Nagahiro Saito ◽

Nutthavich Thouchprasitchai ◽

...

Keyword(s):

Adsorption Capacity ◽

Co2 Adsorption ◽

Plasma Process ◽

Enthalpy Of Adsorption ◽

Nitrogen Doped ◽

Monolayer Adsorption ◽

One Step ◽

Co2 Adsorption Capacity ◽

Carbon Dioxide Co2 ◽

Pyridinic N

The synthesis of carbon nanoparticles (Cn) and oxygen-doped nanocarbon (OCn) was successfully done through a one-step synthesis by the solution plasma process (SPP). The Cn and OCn were nitrogen-doped by nitridation under an ammonia atmosphere at 800 °C for 2 h to yield NCn and NOCn, respectively, for carbon dioxide (CO2) adsorption. The NOCn exhibited the highest specific surface area (~570 m2 g−1) and highest CO2 adsorption capacity (1.63 mmol g−1 at 25 °C) among the synthesized samples. The primary nitrogen species on the surface of NOCn were pyridinic-N and pyrrolic-N. The synergistic effect of microporosity and nitrogen functionality on the NOCn surface played an essential role in CO2 adsorption enhancement. From the thermodynamic viewpoint, the CO2 adsorption on NOCn was physisorption, exothermic, and spontaneous. The NOCn showed a more negative enthalpy of adsorption, indicating its stronger interaction for CO2 on the surface, and hence, the higher adsorption capacity. The CO2 adsorption on NOCn over the whole pressure range at 25–55 °C best fitted the Toth model, suggesting monolayer adsorption on the heterogeneous surface. In addition, NOCn expressed a higher selective CO2 adsorption than Cn and so was a good candidate for multicycle adsorption.

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Evaluation of Kaolinite and activated carbon performance for CO2 capture

10.51415/10321/3623 ◽

2021 ◽

Author(s):

◽

Stephen Okiemute Akpasi

Keyword(s):

Activated Carbon ◽

Adsorption Capacity ◽

Surface Area ◽

Co2 Capture ◽

Gas Flow ◽

Co2 Adsorption ◽

Carbon Composite ◽

Composite Adsorbent ◽

Bed Height ◽

Co2 Adsorption Capacity

Global climate change is one of the major threats facing the world today and can be due to increased atmospheric concentrations of greenhouse gases (GHGs), such as carbon dioxide (CO2). There is also an immediate need to reduce CO2 emissions, and one of the potential solutions for reducing CO2 emissions is carbon capture and storage (CCS). This work investigated the performance assessment of kaolinite and activated carbon (AC) adsorbent for CO2 capture. In particular, the effect of operating parameters such as temperature, bed height, inlet gas flow rate etc. on CO2 adsorption behaviour of the adsorbents was also investigated. Extensive research on the development of adsorbents that can adsorb large amounts of CO2 with low energy consumption has recently been carried out. In CO2 adsorption technology, the challenge is to develop an adsorbent that is not only non-toxic, eco-friendly, and cost-effective, but also has the potential to extract CO2 gas from a mixed gas stream selectively and effectively. Due to the possibility of a potential adsorbent due to its low cost, rich natural abundance and high mechanical and chemical stability, this study proposes kaolinite. As the presence of clay minerals in soils serves as a pollutant collector to enhance the atmosphere, kaolinite has the potential to be an efficient adsorbent for CO2 capture. Kaolinite was investigated as an adsorbent in this research to confirm if it is suitable for CO2 capture. Kaolinite/activated carbon composite adsorbents were synthesized. Sugarcane bagasse was used in preparing the activated carbon (AC). ZnCl2 was impregnated onto sugarcane bagasse during the preparation of activated carbon (AC) to improve the physical properties (surface area, pore size and pore volume) and the CO2 adsorption capacity of the activated carbon (AC) adsorbent developed. The materials were characterized and tested for CO2 adsorption (activated carbon and kaolinite). BET, FTIR and SEM studies were used to classify the adsorbents for their surface area and pore properties, functional groups, and surface morphology, respectively. BET analysis was conducted and the pore volume, pore size and surface area of the adsorbent materials were reported. Functional groups were actively present in the adsorption process. This was verified using FTIR spectroscopy. The kaolinite adsorbent was not feasible for CO2 capture. BET, SEM, and custom-built CO2 adsorption equipment have confirmed this. In contrast to literature, the CO2 adsorption capacity of kaolinite was low. This is due to the fact that kaolinite used in this study is not suitable as adsorbent for CO2 capture as they exhibited a low CO2 adsorption capacity. The results obtained in this study show that temperature, bed height and inlet gas flow rate influenced the adsorption behaviour of activated carbon (AC), kaolinite and kaolinite/activated carbon composite adsorbent during CO2 capture. At 30 0C, activated carbon (AC) exhibited an adsorption capacity of 28.97 mg CO2/g, the highest capacity among all the adsorbents tested. Kaolinite-activated carbon composite adsorbent offered CO2 adsorption capacities of 18.54 mg CO2/g. Kaolinite provides the lowest capacity of 12.98 mg CO2/g. In conclusion, this research verified that CO2 adsorption with kaolinite and activated carbon is favoured at low temperatures, low operating CO2 flowrates and high column bed height.

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Continuous Fixed Bed CO2 Adsorption: Breakthrough, Column Efficiency, Mass Transfer Zone

Processes ◽

10.3390/pr8101233 ◽

2020 ◽

Vol 8 (10) ◽

pp. 1233

Author(s):

Mohammed K. Al Mesfer ◽

Mohd Danish ◽

Mohammed Ilyas Khan ◽

Ismat Hassan Ali ◽

Mudassir Hasan ◽

...

Keyword(s):

Mass Transfer ◽

Adsorption Capacity ◽

Co2 Capture ◽

Molecular Sieve ◽

Co2 Adsorption ◽

Superficial Velocity ◽

Column Efficiency ◽

Co2 Adsorption Capacity ◽

Mass Transfer Zone ◽

Transfer Zone

The increased levels of carbon dioxide in the environment have incited the search for breakthrough technologies to lessen its impact on climate. The CO2 capture from a mixture of CO2/N2 was studied using a molecular sieve (MS) and silica gel type-III. The breakthrough behavior was predicted as a function of temperature, superficial velocity, and CO2 partial pressure. The breakpoint time reduced significantly with increased temperature and increased superficial velocity. The CO2 adsorption capacity increased appreciably with decreased temperature and increased CO2 pressure. The saturation CO2 adsorption capacity from the CO2/N2 mixture reduced appreciably with increased temperature. The molecular sieve contributed to higher adsorption capacity, and the highest CO2 uptake of 0.665 mmol/g was realized for MS. The smaller width of the mass transfer zone and higher column efficiency of 87.5% for MS signify the efficient use of the adsorbent; this lowers the regeneration cost. The findings suggest that a molecular sieve is suitable for CO2 capture due to high adsorption performance owing to better adsorption characteristic parameters.

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K2CO3-Impregnated Al/Si Aerogel Prepared by Ambient Pressure Drying for CO2 Capture: Synthesis, Characterization and Adsorption Characteristics

Materials ◽

10.3390/ma13173741 ◽

2020 ◽

Vol 13 (17) ◽

pp. 3741

Author(s):

Yanlin Wang ◽

Baihe Guo ◽

Jingnan Guo ◽

Man Zhang ◽

Hairui Yang ◽

...

Keyword(s):

Adsorption Capacity ◽

Co2 Capture ◽

Adsorption Process ◽

Co2 Adsorption ◽

Ambient Pressure ◽

Ambient Pressure Drying ◽

Fixed Bed Reactor ◽

X Ray ◽

Adsorption Performance ◽

Co2 Adsorption Capacity

A new potassium-based adsorbent for CO2 capture with Al aerogel used as support is proposed in this work. The adsorbents with different surface modifiers (tetraethyl orthosilicate (TEOS) and trimethyl chlorosilane (TMCS)) and different K2CO3 loadings (10%, 20%, 30% and 40%) were prepared by sol-gel and iso-volume impregnation processes with ambient pressure drying. The CO2 adsorption performance of the adsorbents were tested by a fixed-bed reactor, and their adsorption mechanisms were studied by scanning electron microscopy (SEM), Brunauer Emmett Teller (BET), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and X-ray fluorescence spectrometry (XRF). Furthermore, the adsorption kinetics and the cycling performance were investigated. The results show that using TEOS to modify the wet gel can introduce SiO2 to increase the strength of the skeleton. On the basis of TEOS modification, TMCS can further modify –OH, thus effectively avoiding the destruction of aerogel structure during ambient drying and K2CO3 impregnation. In this work, the specific surface area and specific pore volume of Al aerogel modified by TEOS + TMCS are up to 635.32 cm2/g and 2.43 cm3/g, respectively. The aerogels without modification (Al-B), TEOS modification (Al/Si) and TEOS + TMCS modification (Al/Si-TMCS) showed the best CO2 adsorption performance at 20%, 30% and 30% K2CO3 loading, respectively. In particular, the CO2 adsorption capacity and K2CO3 utilization rate of Al/Si-TMCS-30K are as high as 2.36 mmol/g and 93.2% at 70 degrees Celsius (°C). Avrami’s fractional order kinetic model can well fit the CO2 adsorption process of potassium-based adsorbents. Al-B-20K has a higher apparent activation energy and a lower adsorption rate during the adsorption process. After 15 adsorption-regeneration cycles, Al/Si-TMCS-30K maintain a stable CO2 adsorption capacity and framework structure, while the microstructure of Al/Si-30K is destroyed, resulting in a decrease in its adsorption capacity by nearly 30%. This work provides key data for the application of Al aerogel in the field of potassium-based adsorbent for CO2 capture.

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