Description of Carbon Dioxide Adsorption and Desorption onto Malaysian Coals under Subcritical Condition

Investigation of the regularities of chemical processes, not only near but also far from the stationary state, gives additional information on their mechanisms. In this paper, we present a new method for estimating rate constants of adsorption-desorption processes from the experimentally measured values of the nonstationary concentrations of an adsorbed substance, based on calculating the instantaneous rates of the adsorption (or desorption) process. This method allows to connect unknown kinetic parameters of adsorption (desorption) of a substance on the catalyst surface for various most probable assumed mechanisms with the calculated values of the instantaneous rates of adsorption-desorption processes. As a consequence, the method makes it possible to solve two types of inverse problems of chemical kinetics: calculate point and interval values of rates constants of adsorption and desorption; determine the most likely mechanism from several proposed mechanisms of implementation of these processes. Using this method, point and interval values of the rates constants of adsorption and desorption of carbon dioxide were determined on the base of nonstationary experimental data on adsorption on the assumption of carbon dioxide adsorption on a chromoxide catalyst to three proposed mechanisms: linear, bimolecular and dissociative. Based on the results of calculations, the corresponding non-stationary dependences of carbon dioxide adsorption were restored, which were compared with the experimental data. The obtained results confirm that the previously established dissociative mechanism of adsorption of carbon dioxide on the chromoside catalyst is the most probable. The developed simple method does not require the use of complex optimization calculations and can be used to solve the inverse problem of chemical kinetics associated with the determination of mechanisms and the estimation of the rates constants of adsorption and desorption of substances on various catalysts.Forcitation:Kol’tsov N.I., Fedotov V.Kh. Study of carbon dioxide adsorption on chromoxide catalyst on non-stationary concentrations. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 37-42

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Carbon Dioxide Adsorption and Desorption Study Using Bimetallic Calcium Oxide Impregnated on Iron (III) Oxide

Materials Science Forum ◽

10.4028/www.scientific.net/msf.888.479 ◽

2017 ◽

Vol 888 ◽

pp. 479-484 ◽

Cited By ~ 2

Author(s):

Azizul Hakim ◽

Mohd Ambar Yarmo ◽

Tengku Sharifah Marliza ◽

Maratun Najiha Abu Tahari ◽

Wan Zurina Samad ◽

...

Keyword(s):

Carbon Dioxide ◽

Calcium Oxide ◽

Impregnation Method ◽

Carbon Dioxide Adsorption ◽

Adsorption And Desorption ◽

Basic Sites ◽

Desorption Temperature ◽

Potential Source ◽

Desorption Study ◽

Adsorbent System

Bimetal adsorbent system of calcium oxide impregnated on iron (III) oxide were evaluated as a potential source of basic sites for CO2 capture. The adsorbents were prepared by impregnation method were calcined at 200 until 600 °C. Several characterizations were carried out using XRD, BET and CO2-TPD analysis. The CaO loading increased the basicity of the adsorbent significantly enhance the CO2 chemisorption. Furthermore, it drastically reduced the desorption temperature to 310-490 °C, which is important in chemisorption aspect. The CaO/Fe2O3200 which calcined at 200 °C was found to be most efficient. The CO2 chemisorption (81.29 mg CO2/g adsorbent) was contributed most compared to physisorption (4.64 mg CO2/g adsorbent).

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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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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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