Comparative studies of CO2 and CH4 sorption on activated carbon in presence of water

Wang, Yuxin; Zhou, Yaping; Liu, Congmin; Zhou, Li

doi:10.1016/j.colsurfa.2008.02.014

Cited by 86 publications

(72 citation statements)

References 15 publications

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“…One of the proposed solutions is by sequestering CO 2 in the deep ocean by formation of gas hydrates in porous media [2,3]. It could be a potential method to store CO 2 as CO 2 hydrates can be formed in the sea deeper than 400 m [1]. However, the large concentration difference of CO 2 in hydrates and in the surrounding natural seawater renders the naked CO 2 hydrates unstable.…”

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

“…Zheng and his co-workers have reported that the formation of CO 2 hydrates were influenced by the quantity of pre-sorbed water and pore size distribution of the silica gel [3]. Only the pores with a definite size are suitable for hydrate formation as the impetus of pore space for hydrate formation disappears if the pore size is too large [1,3]. A less amount of water was used for hydrate formation in silica gel as compared with activated carbon due to the strong H-bonding between the water and the silicon hydroxyl group on the surface [3].…”

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

“…Large amounts of experimental data are available focusing hydrate formation under bulk conditions, only a few studies have addressed hydrate formation in porous media. Activated carbon and silica gel are two porous media often used in the recent studies [1,[3][4][5]. Wang et al [1] measured the sorption behaviour of CO 2 and CH 4 on activated carbon with a wide pore-size distribution at 275 K in different amount of water content.…”

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

“…Activated carbon and silica gel are two porous media often used in the recent studies [1,[3][4][5]. Wang et al [1] measured the sorption behaviour of CO 2 and CH 4 on activated carbon with a wide pore-size distribution at 275 K in different amount of water content. They observed that there were an inflection pressures at about 1.5-2.0 MPa and at 3 MPa on sorption isotherms of CO 2 and CH 4 ; respectively to indicate hydrate formation in the system.…”

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

“…Thus, carbon capture and sequestration (CCS) is becoming highly important process to ensure the world sustainability. The CCS is a process of capturing waste CO 2 from large point sources and storing the captured CO 2 safely [1]. Several options for CO 2 removal have been suggested to reduce the large amount of CO 2 emitted to the atmosphere.…”

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

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Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Azmi

Yusup

Sabil

2015

WIT Transactions on Ecology and the Environment

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Calcium-based adsorbents produced by biomass material is technically feasible, costly effective and advantageous to a certain extent in capturing CO 2 . Since the waste of a cockle shell is found to contain around 98% calcium, it can be a good source for CaCO 3 and yield CaO through the high temperature calcination process. The sorption equilibria of CO 2 on synthesized CaO with different amounts of water were measured experimentally by using a volumetric method at a temperature of 2°C. Under dry conditions, synthesized CaO has a low CO 2 uptake, as the adsorption rate of CO 2 in calcium-based sorbent is high at higher temperatures. While under wet conditions, the large increment of CO 2 adsorption was observed due to formation of CO 2 hydrates which were indicated by inflection of isotherms at a definite pressure of the S-shape. At the inflection point, the highest sorption capacity (5.07 mmol/g) was obtained at a water ratio of 0.55, which is about 30 times higher than dry samples. The trend of FTIR spectra were observed to be similar for raw cockle shells and wet CaO after CO 2 adsorption, in contrast with spectra of CaO before adsorption. The formation of CO 2 hydrate can be further verified by the changes of surface morphology of CaO, before and after adsorption. It can be concluded that calcium-based sorbent with the presence of water has the ability to be further utilized for CO 2 separation.

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Section: Carbon Dioxide Emissionmentioning

confidence: 99%

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

Section: Carbon Dioxide Emissionmentioning

confidence: 99%

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Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Azmi

Yusup

Sabil

2015

WIT Transactions on Ecology and the Environment

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Synthesis–Structure–Property Relationships for Hyperbranched Aminosilica CO₂ Adsorbents

Drese

Choi

Lively

et al. 2009

Adv Funct Materials

275

277

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Hyperbranched aminosilica (HAS) adsorbents are prepared via the ring‐opening polymerization of aziridine in the presence of mesoporous silica SBA‐15 support. The aminopolymers are covalently bound to the silica support and capture CO2 reversibly in a temperature swing process. Here, a range of HAS materials are prepared with different organic loadings. The effects of organic loading on the structural properties and CO2 adsorption properties of the resultant hybrid materials are examined. The residual porosity in the HAS adsorbents after organic loading, as well as the molecular weights and degrees of branching for the separated aminopolymers, are determined to draw a relationship between adsorbent structure and performance. Humid adsorption working capacities and apparent adsorption kinetics are determined from experiments in a packed‐bed flow system monitored by mass spectrometry. Dry adsorption isotherms are presented for one HAS adsorbent with a high amine loading at 35 and 75 °C. These combined results establish the relationships between adsorbent synthesis, structure, and CO2 adsorption properties of the family of HAS materials.

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Dry and Wet CO₂ Capture from Milk‐Derived Microporous Carbons with Tuned Hydrophobicity

Pokrzywinski

Aulakh

Verdegaal

et al. 2020

Advanced Sustainable Systems

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limits. One potentially useful technology for reducing CO 2 is to directly capture it from power plant flue gas, as well as from other stationary emissions sources. Three different technological approaches for capture of CO 2 from stationary sources are currently being investigated; post-combustion, pre-combustion, and oxyfuel combustion capture. [1] For post-combustion capture, CO 2 is removed from the flue gas which is emitted after combustion of the fuel in air. Pre-combustion CO 2 capture can be performed following gasification of the coal, prior to combustion producing a high-pressure flue gas containing H 2 and CO 2. Based on the respective flue gas compositions, it is necessary for a postcombustion CO 2 adsorbent to exhibit a high CO 2 /N 2 /H 2 O selectivity, and for a pre-combustion adsorbent to have a high CO 2 /H 2 /H 2 O selectivity. [2] Numerous solid or liquid-based CO 2 sorbents have been examined, including zeolites, [3] activated carbons, [4] metal-organic frameworks (MOFs), [5] ionic liquids, [6] polymeric membranes, [7] microporous polymers, [8] and mesoporous silica. [9] Amine-tethered adsorbents exhibit particularly useful attributes, such as wide temperature operating windows, as a result of their CO 2sorbent interaction energies that range from 50 to 100 kJ mol −1. However, amines have limits for large-scale field applications due to the associated large energy penalty for sorbent regeneration, and their low thermal stability over time. [10] MOFs based on unsaturated metal sites have exhibited attractive CO 2 uptake capacities, in addition to acting as stable supports for amines. [11] However, to date their scale-up remains limited. Activated carbons are attractive for CO 2 capture due to their low-cost and overall abundance, in particular when derived from biomassbased precursors, or from coal and oil products. Carbons derived from pyrolysis and activation of yeast, [12] fungi, [13] palm shells, [14] coconut shells, [15] pine nut shells, [16] soya bean dregs, [17,18] bamboo, [19] wheat flour, [20] and leaves [21] have been employed for carbon capture. [22] Carbons prepared from such waste precursors stand out as economically promising and sustainable, but generally fall short of meeting the CO 2 capture performance metrics set by the more complex and expensive systems such as MOFs. Hence, the pressing challenge is to create an inexpensive "green" activated carbon, but with stateof-the-art CO 2 capture performance. This is the first report of Pore size distribution and surface chemistry of bio-derived (milk) microporous dominated carbon "MDC" is synergistically tuned, allowing for promising carbon capture in a dry CO 2 atmosphere and in mixed H 2 O-CO 2. The capture capacity is attributed to the synergy of a large total surface area with an ultramicroporous and microporous texture (e.g., S tot 1889 m 2 g −1 , S mic 1755 m 2 g −1 , S ultra 1393 m 2 g −1), and a high content of nitrogen and oxygen heteroatom moieties (e.g., 5 at% N, 10.5 at% O). Tailored two-step low-temperature pyrolysischem...

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Comparative studies of CO2 and CH4 sorption on activated carbon in presence of water

Cited by 86 publications

References 15 publications

Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Synthesis–Structure–Property Relationships for Hyperbranched Aminosilica CO₂ Adsorbents

Dry and Wet CO₂ Capture from Milk‐Derived Microporous Carbons with Tuned Hydrophobicity

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Comparative studies of CO2 and CH4 sorption on activated carbon in presence of water

Cited by 86 publications

References 15 publications

Sorption equilibria of CO2 on synthesized CaO in the presence of water

Sorption equilibria of CO2 on synthesized CaO in the presence of water

Synthesis–Structure–Property Relationships for Hyperbranched Aminosilica CO2 Adsorbents

Dry and Wet CO2 Capture from Milk‐Derived Microporous Carbons with Tuned Hydrophobicity

Contact Info

Product

Resources

About

Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Sorption equilibria of CO₂ on synthesized CaO in the presence of water

Synthesis–Structure–Property Relationships for Hyperbranched Aminosilica CO₂ Adsorbents

Dry and Wet CO₂ Capture from Milk‐Derived Microporous Carbons with Tuned Hydrophobicity