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

2017 ◽  
Vol 888 ◽  
pp. 479-484 ◽  
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).

Diamine-Functionalization of a Metal-Organic Framework Adsorbent for Superb Carbon Dioxide Adsorption and Desorption Properties

ChemSusChem ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1694-1707 ◽  
Author(s):  
Woo Ram Lee ◽  
Jeong Eun Kim ◽  
Sung Jin Lee ◽  
Minjung Kang ◽  
Dong Won Kang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Metal Organic Framework ◽  
Carbon Dioxide Adsorption ◽  
Adsorption And Desorption ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Regeneration of Adsorbents by the Use of Liquid, Subcritical and Supercritical Carbon Dioxide

2000 ◽  
Vol 18 (4) ◽  
pp. 347-371 ◽  
Author(s):  
Henryk Grajek
Keyword(s):  
Carbon Dioxide ◽  
Activation Energy ◽  
Particle Size ◽  
Supercritical Carbon Dioxide ◽  
Adsorption And Desorption ◽  
Extraction Solvent ◽  
Desorption Temperature ◽  
Desorption Efficiency ◽  
The Subject ◽  
Supercritical Carbon

The literature concerning the adsorption and desorption of environmental impurities from adsorbents by means of liquid, subcritical and supercritical carbon dioxide and the author's work on the subject have been reviewed. The influence of the adsorption and desorption temperature, the pressure and the density of the extraction solvent, the solubility of the adsorbate in the extraction solvent, the activation energy for adsorbate desorption and the particle size of the adsorbent on the adsorbate desorption efficiency by this method were discussed.

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

2016 ◽  
Vol 148 ◽  
pp. 600-608 ◽  
Author(s):  
Mustafa Abunowara ◽  
Mohamad Azmi Bustam ◽  
Suriati Sufian ◽  
Usama Eldemerdash
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Adsorption ◽  
Adsorption And Desorption ◽  
Subcritical Condition

scholarly journals STUDY OF CARBON DIOXIDE ADSORPTION ON CHROMOXIDE CATALYST ON NON-STATIONARY CONCENTRATIONS

2018 ◽  
Vol 61 (7) ◽  
pp. 37 ◽  
Author(s):  
Nikolay I. Kol'tsov ◽  
Vladislav Kh. Fedotov
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Chemical Kinetics ◽  
Carbon Dioxide Adsorption ◽  
Dissociative Mechanism ◽  
Simple Method ◽  
Desorption Process ◽  
Adsorption And Desorption ◽  
Additional Information ◽  
Adsorption Desorption

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

scholarly journals A computational study of carbon dioxide adsorption on solid boron

2014 ◽  
Vol 16 (25) ◽  
pp. 12695-12702 ◽  
Author(s):  
Qiao Sun ◽  
Meng Wang ◽  
Zhen Li ◽  
Aijun Du ◽  
Debra J. Searles
Keyword(s):  
Carbon Dioxide ◽  
Lewis Acid ◽  
Computational Study ◽  
Carbon Dioxide Adsorption ◽  
Acid Base ◽  
Basic Sites

The study demonstrates these “electron deficient” boron solids can capture CO2 on their basic sites due to Lewis acid–base interactions.

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

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

<p>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 260<sup>o</sup> 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 CO<sub>2</sub> gas molecule to the polymers. One of the imine polymers, COP-3 showed more carbon dioxide sorption capacity and isosteric heat of adsorption (Q<sub>st</sub>) 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.</p>

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