Activated carbon adsorption behaviour of toluene at various temperatures and relative humidity

Görgülü, Adnan; Yağlı, Hüseyin; Koç, Yıldız; Koç, Ali; Baltacıoğlu, Ertuğrul

doi:10.37190/epe190109

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…The exergetic sustainability index (θ est ) is the product of ( f es ) and (θ eii ) of the power production system as enclosed in Equation (29). The required value of this indicator needs to be as higher as possible.…”

Section: Exergetic Sustainability Indexmentioning

confidence: 99%

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Exergetic, Economic and Exergo-Environmental Analysis of Bottoming Power Cycles Operating with CO2-Based Binary Mixture

et al. 2020

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This study focused on investigating the bottoming power cycles operating with CO2-based binary mixture, taking into account exergetic, economic and exergo-environmental impact indices. The main intent is to assess the benefits of employing a CO2-based mixture working fluid in closed Brayton bottoming power cycles in comparison with pure CO2 working fluid. Firstly, selection criteria for the choice of suitable additive compound for CO2-based binary mixture is delineated and the composition of the binary mixture is decided based on required cycle minimum temperature. The decided CO2-C7H8 binary mixture with a 0.9 mole fraction of CO2 is analyzed in two cycle configurations: Simple regenerative cycle (SRC) and Partial heating cycle (PHC). Comparative analysis among two configurations with selected working fluid are carried out. Thermodynamic analyses at varying cycle pressure ratio shows that cycle with CO2-C7H8 mixture shows maximum power output and exergy efficiency at rather higher cycle pressure ratio compared to pure CO2 power cycles. PHC with CO2-C7H8 mixture shows 28.68% increment in exergy efficiency with the levelized cost of electricity (LCOE) 21.62% higher than pure CO2 PHC. Whereas, SRC with CO2-C7H8 mixture shows 25.17% increment in exergy efficiency with LCOE 57.14% higher than pure CO2 SRC. Besides showing lower economic value, cycles with a CO2-C7H8 mixture saves larger CO2 emissions and also shows greater exergo-environmental impact improvement and plant sustainability index.

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Section: Exergetic Sustainability Indexmentioning

confidence: 99%

“…Moderately toxic, however, its harmful impacts on humanity may potentially be reduced by using efficient filtration techniques [29].…”

mentioning

confidence: 99%

Exergetic, Economic and Exergo-Environmental Analysis of Bottoming Power Cycles Operating with CO2-Based Binary Mixture

et al. 2020

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“…It is also used in industries as a solvent in the preparation of paints, adhesives, rubbers, plastics, and the production of various chemical compounds. Although toluene is less toxic than benzene and is not considered a carcinogen, its combination with other substances increases its carcinogenic effect (5,6).…”

Section: Introductionmentioning

confidence: 99%

Removal of toluene from Air- scream using semi industrial two-phase bioscrubber with cutting oil: An intervention study

2024

Global NEST Journal

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<p>Toluene is a monocyclic aromatic compound that finds widespread use in various industrial processes. Due to its harmful effects on human health and environment, this study aimed to remove toluene from the air stream using a two-phase bioscrubber. The bioscrubber design consisted of an absorption column that separated contaminants from the gaseous phase to the aqueous phase and a bioreactor for the biodegradation of toluene by microorganisms. Organic phases of cutting oil were added at concentrations of 5%, 7.5%, and 10%. The biodegradability test results revealed that 98% of the toluene concentration was further biodegraded after 72 hours compared to the control sample. The results showed that the use of 5% concentration of cutting oil increased the efficiency from 22% to 55%, At a concentration of 7.5%, the lowest efficiency was 38% and the highest was 63%. Also, the minimum and maximum removal capacity are 17 and 269 g/m3.h, respectively. Efficiency at a concentration level of 5% of cutting oil as an organic phase is better than a concentration of 7.5%. These findings indicate that the efficacy of the bioscrubber is better when using a 5% concentration of cutting oil as an organic phase. Moreover, this study is the first to use cutting oil as an organic phase in Iran, which showed that using cutting oil in concentrations less than 10% had no adverse effects on microorganisms' growth.</p>

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“…The odor-causing substance can react chemically with the surface of the adsorbent to form a nonvolatile and non-odoriferous compound, or it can simply be adsorbed. An efficient adsorbent is capable of removing all odoriferous compounds present in its surroundings, even in trace amounts, and retaining those compounds under near-saturation conditions [25]. Adsorption of VOCs including toluene and butane on ACs was studied concerning temperature and humidity effects [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…An efficient adsorbent is capable of removing all odoriferous compounds present in its surroundings, even in trace amounts, and retaining those compounds under near-saturation conditions [25]. Adsorption of VOCs including toluene and butane on ACs was studied concerning temperature and humidity effects [25,26]. The same group of researchers explored ACs adsorption capacity for nitrogen dioxide at different gas concentrations, temperatures, and relative humidity [27].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

Park

Yaqub

Lee

et al. 2021

Environmental Engineering Research

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The adsorption of acetaldehyde from air using various activated carbon and carbon fibers was investigated in this study. These adsorbents included activated carbon (AC), carbon fibers (CFs), activated carbon fibers (ACFs), and metal-coated carbon fibers (MCCFs) supplied by different manufacturers. AC was categorized as AC 1 , AC 2 , AC 3 , and AC 4 , CFs were denoted as ACF 1 , while ACFs and MCCFs were denoted as ACF 2 and ACF 3 , respectively. Five composite materials were prepared using the AC and ACFs in different ratios, and experiments were conducted to assess their acetaldehyde adsorption efficiency under dry and wet conditions. The results showed that the acetaldehyde adsorption efficiency of an impregnated AC 4 was higher (95.9%) than that of both non-impregnated AC 1 and AC 3 and an impregnated AC 2 after 1 min of operation. ACF 2 showed a higher acetaldehyde adsorption efficiency (50.9%) as compared to ACF 1 and ACF 3 because of its larger surface area and selective absorption capability after 1 min of operation. A composite material consisting of 6.3 g of AC 4 and 1 g of ACF 2 showed the highest adsorption efficiency of 97.9% under dry conditions. However, this adsorption efficiency significantly decreased under wet conditions.

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Activated carbon adsorption behaviour of toluene at various temperatures and relative humidity

Cited by 7 publications

References 16 publications

Exergetic, Economic and Exergo-Environmental Analysis of Bottoming Power Cycles Operating with CO2-Based Binary Mixture

Exergetic, Economic and Exergo-Environmental Analysis of Bottoming Power Cycles Operating with CO2-Based Binary Mixture

Removal of toluene from Air- scream using semi industrial two-phase bioscrubber with cutting oil: An intervention study

Adsorption of acetaldehyde from air by activated carbon and carbon fibers

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