Characterization of Activated Carbon Adsorbents – State of …
Temperature-programmed desorption (TPD) enables a qualitative characterization of oxygen-containing functional surface groups. TPD is a thermally induced desorption of a loaded activated carbon in an inert carrier gas stream.
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Water Vapor Adsorption/Desorption Behaviors on …
Relative humidity and moisture content are the key factors affecting the adsorption abilities of activated carbons (ACs) against these physisorption-type volatile organic compounds and industrial toxic chemicals …
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Microwave desorption and regeneration methods for activated carbon …
The effect of microwave desorption activated carbon is remarkable, in our experiment, the maximum desorption rate of the activated carbon reached 97.6%;The loss rate of the activated carbon after regeneration was low, and the total loss rate was 2.65% after five cycles of continuous absorption and desorption. The results can provide guidance ...
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Effects of Adsorption and Desorption of Low-Boiling-Point …
In this study, we selected materials that efficiently adsorb total hydrocarbons (THCs) from petrochemical storage facilities and applied four types of activated carbons to adsorb THCs to evaluate their properties.
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Adsorption and desorption of phenol on activated carbon …
The commercial activated carbon was used in the batch experiments without any pretreatment. The physical properties of granular activated carbon are apparent density of 0.4 g/cm 3, particle size of 1.4 mm and average pore diameter of 18 Å. Phenol analyses are performed according to standard methods of APHA [16].A 100 ml each of phenol solution (100 …
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Adsorption and Desorption Performance and Mechanism of …
Adsorption and desorption behaviors of tetracycline hydrochloride by activated carbon-based adsorbents derived from sugar cane bagasse modified with ZnCl 2 were investigated. The activated carbon was tested by SEM, EDX, BET, XRD, FTIR, and XPS.
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Thermal desorption characteristics of the adsorbate in activated carbon …
Using activated carbon with a thermal conductivity of 5 W / m ∙ K can save about 40% of energy consumption. The model established in this paper can accurately simulate the thermal desorption of adsorbate in activated carbon, which is helpful to deeply understand the mechanism of activated carbon thermal regeneration.
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Phenol adsorption on high microporous activated carbons
N 2 adsorption/desorption isotherms at −196 °C of the prepared activated carbons by KOH from oily sludge (CK) at (A) different activation temperatures (T, 600, 700, 800 and 900 °C) and at ...
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Activated Carbon as an Adsorbent for CO
The main objective of this research is to investigate the adsorption isotherms and the optimization of the carbon dioxide (CO 2) adsorption process on activated carbon (AC). The AC has been characterized by X-ray diffraction, scanning …
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Effects of Adsorption and Desorption of Low-Boiling-Point …
In this study, we selected materials that efficiently adsorb total hydrocarbons (THCs) from petrochemical storage facilities and applied four types of activated carbons to …
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Adsorption and desorption of a mixture of volatile organic …
Mesoporous activated carbons showed faster adsorption and desorption kinetics. Nonpolar VOCs displaced their polar counterparts via competitive adsorption. Nonpolar, high-boiling-point VOCs were the main contributors to heel formation.
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Study on the Desorption Mechanism of Sulfur …
As indicated by those results, the adsorption bonds of the SO 2-modified activated carbon were mainly C-O-S and C-S-C. After the carbon cluster model adsorbed SO 2 …
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Characterization of Activated Carbon Adsorbents – State …
Temperature-programmed desorption (TPD) enables a qualitative characterization of oxygen-containing functional surface groups. TPD is a thermally induced desorption of a loaded activated carbon in an inert carrier gas stream.
WhatsApp: +86 18221755073
Activated Carbon as an Adsorbent for CO
The main objective of this research is to investigate the adsorption isotherms and the optimization of the carbon dioxide (CO 2) adsorption process on activated carbon (AC). The AC has been characterized by X-ray diffraction, scanning electron microscopy, and nitrogen (N 2) adsorption–desorption.
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Key factors and primary modification methods of activated carbon …
Activated carbon is widely used to treat different types of carbon-based gases owing to its large specific surface area, abundant functional groups, and strong adsorption capacity. This paper reviews the recent research progress into activated carbon …
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Ammonia capture by adsorption on doped and undoped activated carbon …
In the case of undoped activated carbon, ammonia uptake by a pure physisorption process is suggested as a control mechanism, since considering the hysteresis loop, ammonia can be completely removed after desorption. This is not the case for desorption of doped activated carbon since an ammonia amount adsorbed about 5 mol.kg −1 is still ...
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Characteristics and mechanism of low-temperature NO …
At medium to low flue gas temperatures, the adsorption mechanism of NO x on activated carbon is primarily dominated by chemical adsorption. After completing adsorption experiments at 50 °C, Zhang et al. [13] conducted desorption experiments on the activated carbon samples. They considered the NO x desorbed by purging at the corresponding adsorption …
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Activated carbons—preparation, characterization and their …
Adsorption-desorption isotherms of activated carbon. The experimental points of the adsorption equilibrium studies on activated carbons are usually presented by the isotherm equation, which characterizes the amount of adsorbed gas in relation to the adsorbent mass as a function of relative pressure, ...
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Activated Carbon: Fundamentals, Classification, and Properties
The dechlorination half-life length, which gauges how well-activated carbon removes chlorine, is used to assess certain carbons. The amount of carbon needed to remove chlorine by 50% is known as the dechlorination half-value length.
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Key factors and primary modification methods of activated …
Activated carbon is widely used to treat different types of carbon-based gases owing to its large specific surface area, abundant functional groups, and strong adsorption capacity. …
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Activated carbons—preparation, characterization and their …
Activated carbon is an excellent and versatile adsorbent and its main applications include the adsorption removal of color, odour, taste, and other undesirable organic and …
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Activated Carbon: Fundamentals, Classification, …
The dechlorination half-life length, which gauges how well-activated carbon removes chlorine, is used to assess certain carbons. The amount of carbon needed to remove chlorine by 50% is known as the …
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Activated carbons—preparation, characterization and their …
Activated carbon is an excellent and versatile adsorbent and its main applications include the adsorption removal of color, odour, taste, and other undesirable organic and inorganic contaminants from drinking water.
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Activated Carbon as an Adsorbent for CO
Abstract. The main objective of this research is to investigate the adsorption isotherms and the optimization of the carbon dioxide (CO 2) adsorption process on activated carbon (AC).The AC has been characterized by X-ray diffraction, scanning electron microscopy, and nitrogen (N 2) adsorption–desorption.The CO 2 isotherms measured under three adsorption temperatures …
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Water Vapor Adsorption/Desorption Behaviors on Activated Carbon
Relative humidity and moisture content are the key factors affecting the adsorption abilities of activated carbons (ACs) against these physisorption-type volatile organic compounds and industrial toxic chemicals due to competitive adsorption.
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The deactivation mechanisms, regeneration methods and …
In this work, the deactivation mechanism of activated carbons during adsorption or catalysis (focusing on adsorption deactivation) was firstly interpreted then main regeneration methods, including thermal methods (thermal regeneration, microwave regeneration, etc) and non-thermal methods (chemical regeneration, electrochemical regeneration, ultr...
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Adsorption and desorption of a mixture of volatile organic …
Mesoporous activated carbons showed faster adsorption and desorption kinetics. Nonpolar VOCs displaced their polar counterparts via competitive adsorption. Nonpolar, high …
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Study on the regeneration of activated carbon adsorbed …
The deep depressurization method can be used for the desorption of activated carbon with adsorbed radon and water at room temperature. During the desorption of 122.5 g of activated carbon with adsorbed radon for an optimal duration of 2 h using the deep depressurization method combined with ventilation, the desorption rate increased with ...
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Insights into chemical regeneration of activated carbon …
Activated carbon is a solid phase adsorbent with a highly porous structure produced by physical and/or chemical activation. The activation process enhances the porosity within the carbon, making the carbon effective in adsorbing small molecular compounds [1].There are two principal types of activated carbon used in water and wastewater treatment processes, which …
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ADSORPTION AND DESORPTION OF PHENOL ON ACTIVATED CARBON FIBERS …
Abstract. The application of activated carbon fibers (ACFs) to remove phenol from water is studied. The adsorption capacity of ACFs is favorable and the adsorption isothermal data can be represented by Langmuir-type equation for phenol concentrations changed from 0 to 0.8 kg/m 3.The regeneration of ACF adsorbent saturated with phenol in a fixed bed can be …
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