Experimental Studies on Coal Matrix Swelling Due to Carbon Dioxide Adsorption and Its Effect on Coal Permeability

In this paper the results of the experimental studies on a relationship between pore volume of hard coals and their tendency to spontaneous combustion are presented. Pore volumes were determined by the gas adsorption method and spontaneous combustion tendencies of coals were evaluated by determination of the spontaneous combustion indexesSzaandSza′on the basis of the current Polish standards. An increase in the spontaneous combustion susceptibility of coal occurs in the case of the rise both in micropore volumes and in macropore surfaces. Porosity of coal strongly affects the possibility of oxygen diffusion into the micropores of coal located inside its porous structure. The volume of coal micropores determined on the basis of the carbon dioxide adsorption isotherms can serve as an indicator of a susceptibility of coal to spontaneous combustion.

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Influence of intramolecular interactions on carbon dioxide gas adsorption capacity in Mesoporous Imine polymers

10.26434/chemrxiv.5826435 ◽

2018 ◽

Author(s):

Jaya Prakash Madda ◽

Pilli Govindaiah ◽

Sushant Kumar Jena ◽

Sabbhavat Krishna ◽

Rupak Kishor

Keyword(s):

Carbon Dioxide ◽

Adsorption Capacity ◽

Density Functional ◽

Gas Adsorption ◽

Ambient Pressure ◽

Condensation Reaction ◽

Intramolecular Interactions ◽

Carbon Dioxide Adsorption ◽

Nitrogen Gas ◽

Adsorption Characteristic

Covalent organic Imine polymers with intrinsic meso-porosity were synthesized by condensation reaction between 4,4-diamino diphenyl methane and (para/meta/ortho)-phthaladehyde. Even though these polymers were synthesized from precursors of bis-bis covalent link mode, the bulk materials were micrometer size particles with intrinsic mesoporous enables nitrogen as well as carbon dioxide adsorption in the void spaces. These polymers were showed stability up to 260o centigrade. Nitrogen gas adsorption capacity up to 250 cc/g in the ambient pressure was observed with type III adsorption characteristic nature. Carbon dioxide adsorption experiments reveal the possible terminal amine functional group to carbamate with CO2 gas molecule to the polymers. One of the imine polymers, COP-3 showed more carbon dioxide sorption capacity and isosteric heat of adsorption (Qst) than COP-1 and COP-2 at 273 K even though COP-3 had lower porosity for nitrogen gas than COP-1 and COP-2. We explained the trends in gas adsorption capacities and Qst values as a consequence of the intra molecular interactions confirmed by Density Functional Theory computational experiments on small molecular fragments.

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Laboratory quantification of coal permeability reduction effect during carbon dioxide injection process

Process Safety and Environmental Protection ◽

10.1016/j.psep.2021.01.038 ◽

2021 ◽

Vol 148 ◽

pp. 638-649

Author(s):

Jia Lin ◽

Ting Ren ◽

Yuanping Cheng ◽

Jan Nemcik

Keyword(s):

Carbon Dioxide ◽

Permeability Reduction ◽

Carbon Dioxide Injection ◽

Coal Permeability ◽

Injection Process ◽

Reduction Effect

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Rice husk-based biochar for carbon dioxide adsorption in biogas

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/599/1/012021 ◽

2020 ◽

Vol 599 ◽

pp. 012021

Author(s):

A Pertiwiningrum ◽

R N Besari ◽

M A Wuri ◽

A W Harto ◽

N A Fitriyanto ◽

...

Keyword(s):

Carbon Dioxide ◽

Rice Husk ◽

Carbon Dioxide Adsorption

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Ethanol-water hydration treated calcium-based adsorbents derived from clam shells and cockle shells for carbon dioxide adsorption

10.1063/5.0044891 ◽

2021 ◽

Author(s):

Sei Ling Tan ◽

Zhi Hua Lee ◽

Shee Keat Mah ◽

Abdul Rahman Mohamed

Keyword(s):

Carbon Dioxide ◽

Carbon Dioxide Adsorption

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Designing microporous activated carbons from biomass for carbon dioxide adsorption at ambient temperature. A comparison between bagasse and rice by-products

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.126260 ◽

2021 ◽

Vol 294 ◽

pp. 126260 ◽

Cited By ~ 1

Author(s):

Phuoc Hoang Ho ◽

Vivian Lofty ◽

Altaf Basta ◽

Philippe Trens

Keyword(s):

Carbon Dioxide ◽

Ambient Temperature ◽

Activated Carbons ◽

Carbon Dioxide Adsorption ◽

By Products

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Effect of low-concentration steam on carbon dioxide adsorption by bituminous coal

AIP Advances ◽

10.1063/5.0022861 ◽

2021 ◽

Vol 11 (1) ◽

pp. 015350

Author(s):

Zheng Hong Gao ◽

Jiren Wang

Keyword(s):

Carbon Dioxide ◽

Bituminous Coal ◽

Carbon Dioxide Adsorption ◽

Low Concentration

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Carbon Capture Performance of Amino-Modified MIL-101 at Room Temperature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.395-396.637 ◽

2013 ◽

Vol 395-396 ◽

pp. 637-640

Author(s):

Yi Yang ◽

Zheng Ping Wang ◽

Ling Meng ◽

Lian Jun Wang

Keyword(s):

Carbon Dioxide ◽

Specific Surface ◽

Pore Structure ◽

Carbon Capture ◽

Room Temperature ◽

Ambient Pressure ◽

Metal Organic Framework ◽

Adsorption Properties ◽

Carbon Dioxide Adsorption ◽

Before And After

MIL-101, a metal-organic framework material, was synthesized by the high-temperature hydrothermal method. Triethylenetetramine (TETA) modification enabled the effective grafting of an amino group onto the surface of the materials and their pore structure. The crystal structure, micromorphology, specific surface area, and pore structure of the samples before and after modification were analyzed with an X-ray diffractometer, scanning electron microscope, specific surface and aperture tester, and infrared spectrometer. The carbon dioxide adsorption properties of the samples were determined by a thermal analyzer before and after TETA modification. Results show that moderate amino modification can effectively improve the microporous structure of MIL-101 and its carbon dioxide adsorption properties. After modification, the capacity of MIL-101 to adsorb carbon dioxide decreased only by 0.61 wt%, and a high adsorption capacity of 9.45 wt% was maintained after six cycles of adsorption testing at room temperature and ambient pressure.

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