Temat: activated carbon - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Removal of reactive yellow dye 145 from wastewaters over activated carbon that is derived from Iraqi kehdrawy date palm seeds
Autorzy:: Esmael, Hussein A.
Lafta, Abbas J.
Nema, Noor A.
Kahdum, Salih H.
Mousa, Abdulazeez A.
Abdali, O. Karar
Powiązania:: https://bibliotekanauki.pl/articles/1193943.pdf
Data publikacji:: 2015
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Activated carbon
Activated charcoal
Adsorption over activated carbon
Textile dyes
activated carbon
date palm seeds
linear Freundlich
linear Langmuir
Opis:: This work involves synthesis of activated carbon from Iraqi date palm seeds as agricultural wastes using kehdrawy palm seeds. The preparation was conducted by chemical activation method using ZnCl2 as an activator. The synthesized activated carbon (AC) was characterized by different analytical and spectroscopic methods. This involves using scanning electron microscopy (SEM), flourier transformation infrared (FTIR), ash content, adsorption capacity, the percentage of humidity and the point zero charge (PZC). The activity of the prepared activated carbon was investigated by following the removal of reactive yellow 145 dye (RY 145) from the aqueous solutions. For a comparison a sample of non- activated carbon (NAC) was used in the same process. From the obtained results it was found that AC was more efficient in dye removal in comparison with NAC under the same conditions
Źródło:: World Scientific News; 2015, 21; 77-89
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Impact of preparation and storage of activated carbon on the high pressure sorption of CO2
Autorzy:: Lutyński, M.
Powiązania:: https://bibliotekanauki.pl/articles/200536.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: activated carbon
sorption
carbon dioxide
Opis:: Adsorption of carbon dioxide on activated carbons has become extremely interesting in the field of energy and environment. Activated carbon is either used as a model to understand sorption processes on coals as a part of research on CO2 geological storage/Enhanced Coalbed Methane or as an adsorbent for processes such as natural gas treatment or CO2 separation from flue gas. The paper presents results of high-pressure CO2 sorption at the temperature of 318K on two similar activated carbons (Filtrasorb 400 and WAZ 0.6-2.4 mm) where one sample of WAZ was not subjected to any pretreatment procedure. Experimental results were fitted with three parameter Langmuir and therefore it was possible to calculate CO2 adsorbed phase densities. The WAZ activated carbon has a slightly lower sorption even though it was pretreated with the same procedure. The untreated sample of WAZ exhibited sorption which was lower over 15%. Calculated adsorbed phase densities differ between the activated carbons and the lowest value was obtained for the untreated WAZ sample (21.0 mol/dm3).
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 113-119
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Adsorption of Naproxen Sodium from Aqueous Solutions on Commercial Activated Carbons
Autorzy:: Lach, Joanna
Szymonik, Anna
Powiązania:: https://bibliotekanauki.pl/articles/123683.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: naproxen sodium
activated carbon
adsorption
Opis:: The pollution of surface and drinking water with pharmaceuticals is one of the growing problems. One of the groups used in large quantities involves nonsteroidal anti-inflammatory drugs which can be bought without a prescription. This group includes naproxen, which was identified in wastewater, surface water and even drinking water all over the world. The aim of the study was to assess the opportunities for the removal of naproxen sodium from water using carbon sorbents. The measurements were carried out for three commercial microporous (WG-12 and F-300) and micro-mesoporous (ROW 08 Supra) activated carbons. The kinetics and statics of adsorption were studied. The adsorption from solutions with pH from 6 to 10 and temperature from 20°C to 40°C was analysed. It was found that the higher the pH, the lower the adsorption and the higher the temperature, the greater the adsorption of naproxen sodium. The highest adsorption of naproxen sodium was obtained for the F-300 activated carbon, whereas the lowest – for the ROW 08 Supra activated carbon. It was found that the adsorption results depend on many factors, the most important of which include hydrogen bonds between carboxyl groups of naproxen sodium and phenolic groups on the surface of activated carbons and electrostatic repulsion between the anions of naproxen sodium and negatively charged the surface of the activated carbon. The results of adsorption kinetics were described with the following models: pseudo-first order and pseudo-second order, intraparticle diffusion, and Elovich. The highest values of correlation coefficient R² were obtained for the pseudo-second order and Elovich model. The results of adsorption statics were described using the Freundlich, Langmuir, and Temkin models. A good match between isotherms and the obtained results was obtained for the Freundlich and Temkin equations. It was found based on the adsorption intensity 1/n and distribution coefficient R_L that this process was beneficial for all the considered activated carbons and the investigated adsorption conditions.
Źródło:: Journal of Ecological Engineering; 2019, 20, 10; 241-251
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Application of Powdery Activated Carbons for Removal Ibuprofen from Water
Autorzy:: Puszkarewicz, A.
Kaleta, J.
Papciak, D.
Powiązania:: https://bibliotekanauki.pl/articles/124366.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ibuprofen
adsorption
powdery activated carbon
Opis:: The paper presents the results of studies on the use of adsorptive properties of selected powdered activated carbons (Norit SA Super and Carbopol MB5) for removal of ibuprofen from water. The tests were performed on non-flow conditions, series depending on the type and dose of powdered adsorbents. The research was carried out on a model solution of ibuprofen at initial concentration C0 = 20 mg/dm³, at 20 °C. Froundlich and Langmuir adsorption isotherms were used. Lagergrene kinetic models (PFO) and Ho (PSO) were used to describe adsorption kinetics. Both carbons exhibited a higher affinity for the adsorbent at pH above 7. Norit SA Super was a better adsorbent, for which, the highest adsorption capacity q = 0.448 g/g was achieved with dose D = 35 mg/dm³. The effectiveness of adsorption (decrease of ibuprofen in water) was 78%. The total removal of ibuprofen was obtained for a dose of carbon D = 200 mg/ dm³. With respect to Carbopol, the highest adsorption capacity (q = 0.353 g/g) was achieved at a dose of 30 mg/dm³, resulting in a 53% efficiency. Studies have shown that both tested powdered activated carbons have contributed to effective cleaning of aqueous solutions containing ibuprofen.
Źródło:: Journal of Ecological Engineering; 2017, 18, 4; 169-177
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Adsorption Kinetics of Edamame Soybean Peel Activated Carbon in Reducing the Level of Phosphate
Autorzy:: Eri, Iva Rustanti
Pramudinta, Namira Kholifatul
Nurmayanti, Demes
Powiązania:: https://bibliotekanauki.pl/articles/2027815.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: adsorption kinetics
activated carbon
phosphate
Opis:: Domestic wastewater, such as detergent wastewater, causes the increase of the phosphate level that strongly contributes to eutrophication. Adsorption is a method that can be used to reduce the levels of phosphate. The natural ingredients that can be made as activated carbon include edamame soybean peel, because it contains a lot of celluloses. This research aimed to analyze the adsorption kinetics and adsorption capacity of edamame soybean peel activated carbon in reducing the phosphate levels. Adsorption was carried out with batch method with various concentrations of adsorbate (2 mg/L, 4 mg/L, and 6 mg/L) and stirring time (3 hours, 6 hours, 9 hours, and 12 hours). The results showed that the highest adsorption capacity was found in 6 mg/L of adsorbate concentration and 6 hours of stirring time. The results were validated by the Langmuir isotherm and pseudo-second-order adsorption kinetics model. The Langmuir isotherm indicated that adsorption occurred in monolayer. The maximum adsorption capacity was 0.43509 mg/g and the constant of adsorption kinetics was 1.5558 g/mg•min. Activated carbon from edamame soybean peel successfully reduced the levels of phosphate. The increase of adsorption capacity was correlated with the increasing concentration of adsorbate and stirring time until the equilibrium.
Źródło:: Journal of Ecological Engineering; 2022, 23, 2; 97-107
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Utilization of spent dregs for the production of activated carbon for CO2 adsorption
Autorzy:: Serafin, J.
Powiązania:: https://bibliotekanauki.pl/articles/779998.pdf
Data publikacji:: 2017
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: activated carbon
biomass
CO2 adsorption
Opis:: The objective of this work was preparation of activated carbon from spent dregs for carbon dioxide adsorption. A saturated solution of KOH was used as an activating agent. Samples were carbonized in the furnace at the temperature of 550°C. Textural properties of activated carbons were obtained based on the adsorption-desorption isotherms of nitrogen at −196°C and carbon dioxide at 0°C. The specific surface areas of activated carbons were calculated by the Brunauer – Emmett – Teller equation. The volumes of micropores were obtained by density functional theory method. The highest CO₂ adsorption was 9.54 mmol/cm³ at 0°C – and 8.50 mmol/cm³ at 25°C.
Źródło:: Polish Journal of Chemical Technology; 2017, 19, 2; 44-50
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Removal of Cadmium using Alkaline-Treated Activated Carbon from Leucaena Leucocephala Biomass
Autorzy:: Ibrahim, W. M. H. W.
Sulaiman, Nurul Syuhada
Amini, Mohd Hazim Mohammad
Kadir, W. R. A.
Mohamed, Mazlan
Ramle, Sitti Fatimah Mhd
Bilgin, Ugur
Rahman, Wan
Powiązania:: https://bibliotekanauki.pl/articles/2125550.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: activated carbon
cadmium
Leucaena leucocephala
adsorption
Opis:: Water contamination that caused by heavy metals is a very common phenomenon in the industrial age. One of the popular way to treat metal contaminated water is by adsorption process using activated carbon as the adsorbent. This paper works on producing activated carbon by chemical means with impregnation ratios of NaOH:char (w/w) was predetermined at 1:1 (ACT1-1), 2:1 (ACT2-1) and 3:1 (ACT3-1) under activation temperature of 700°C. Considering the Leucaena leucocephala is a wildly, easy and fast grown species, with the availability throught the year, it was chosen to be used as the precursor. The properties of these activated carbons and its potential for cadmium removal from aqueus solution was analyzed. It was found that the highest surface area was recorded at 662.76 m²/g. Four parameters were studied which are contact time, the effect of pH, initial concentration of adsorbate and temperature. The equilibrium time was achieved in 40 min treatment at initial concentrations of 30 mg/l. The adsorbent exhibited good sorption potential for cadmium at pH 8.0 and equilibrium temperature of 30℃. Based on the results, this study had proved that activated carbon from Leucaena leucocephala biomass have the good potential to be used for removal of cadmium from wastewater.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 1033--1036
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Reduction of Ammonia Nitrogen and Chemical Oxygen Demand of Fertilizer Industry Liquid Waste by Coconut Shell Activated Carbon in Batch and Continuous Systems
Autorzy:: Budianto, Agus
Pratiwi, Adelia Gita
Ningsih, Sapta Ayu
Kusdarini, Esthi
Powiązania:: https://bibliotekanauki.pl/articles/27323843.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: activated carbon
waste
fertilizer
coconut shell
Opis:: The fertilizer industry laboratory produces urea and ammonia nitrogen waste that can harm living things in the surrounding water bodies. Urea, nitrogen, and ammonia can be reduced by adsorption using activated carbon. This research reduced urea nitrogen and ammonia through activated carbon adsorption with a batch and continuous system. Percentage indicator of urea and ammonia nitrogen removal through Ammonia Nitrogen (NH3-N) and Chemical Oxygen Demand (COD) NH3-N and COD analysis was determined. This study aimed to obtain: 1) the percentage of NH3-N and COD reduction in stem batch; 2) the percentage of NH3-N and COD reduction in the continuous system; 3) the Freundlich and Langmuir isotherm adsorption equation against NH3-N wastewater. They are testing the adsorption power of activated carbon in a batch system using variable levels of activated carbon: 40 g/L, 55 g/L, 70 g/L, 85 g/L, and 100 g/L and testing the adsorption power of activated carbon in a continuous system using the variable frequency of wastewater in contact with activated carbon filter cartridges, namely 2, 3, 4, 5, and 6 times. The results showed: 1) in the batch system NH3-N reduction of 98.26–98.82% and COD reduction of 92.53–97.05%; 2) in continuous system reduction of NH3-N of 86.05–88.07% and COD reduction of 93.91–97.05%; 3) Freundlich isotherm adsorption equation yields constant R2 0.9464, n 0.4482, KF 0.0616 mg/g; while Langmuir’s isotherm adsorption equation yields constant R2 0.8684, b -0.1046 L/mg, and qm 7.9872 mg/g.
Źródło:: Journal of Ecological Engineering; 2023, 24, 7; 156--164
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Zmiany właściwości węgli aktywnych po procesie ich modyfikacji
Changes in the properties of activated carbons on the process of modification
Autorzy:: Okoniewska, E.
Powiązania:: https://bibliotekanauki.pl/articles/125766.pdf
Data publikacji:: 2014
Wydawca:: Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:: węgiel aktywny
modyfikacja
activated carbon
modification
Opis:: Techniczne węgle aktywne WG-12, ROW 08 Supra i F-300 poddano modyfikacji za pomocą pola ultradźwiękowego. Pierwszy z nich to węgiel WG-12 produkowany przez firmę Gryfskand z Hajnówki. ROW 08 Supra to granulowany i uszlachetniony węgiel aktywowany, który można regenerować termicznie. Produkowany jest z torfu przez holenderską firmę Norit metodą parowo-gazową. Charakteryzuje się dużą objętością porów i znacznym rozmiarem ziaren, co sprawia, że jest powszechnie stosowany do uzdatniania wody pitnej w celu polepszania smaku wody oraz usuwania zapachu, ozonu, chloru i mikrozanieczyszczeń (np. rozpuszczonych substancji organicznych czy pestycydów). Węgiel F-300 to węgiel ziarnowy produkowany przez belgijską firmę Chemviron Carbon. Badano węgle aktywne specjalnie modyfikowane za pomocą roztworu KMnO4. Ze względu na redukcyjny charakter powierzchni węglowej Mn7+, pochodzący z roztworu KMnO4, redukuje się do Mn4+, tworząc na jego powierzchni nierozpuszczalny MnO2. Zmodyfikowany w ten sposób węgiel aktywny może być stosowany do usuwania z wody manganu w niepożądanych ilościach. Celem pracy było wykonanie analiz wybranych wskaźników technicznych, takich jak gęstość nasypowa, liczba jodowa, liczba metylenowa i zawartość popiołu zgodnie z PN.
Technical activated carbons WG-12, ROW 08 Supra and F-300 were modified using ultrasonic field. The first is carbon WG-12 produced by block bags from Hajnowka. ROW 08 Supra is refined granulated activated carbon, which can be regenerated thermally, is produced of peat by the Dutch company NORIT by steam and gas. Characterized by high pore volume and a large grain size, which makes it widely used for drinking water treatment in order to improve the taste of water and removal of odor, ozone, chlorine and micropollutants (for example, organic solutes or pesticides). Coal F-300 is a carbon particle size distribution produced by the Belgian company Chemviron Carbon. Test specially modified activated carbon with a solution of KMnO4. Due to the reducing nature of the surface of the carbon derived from Mn7+ KMnO4 solution reduces to Mn4+ form on the surface of insoluble MnO2. This modified activated carbon can be used for removing manganese from water in undesirable amounts. The aim of this study was to perform analyzes of selected technical indicators, such as bulk density, iodine value, the number of methylene and ash content in accordance with Polish standards.
Źródło:: Proceedings of ECOpole; 2014, 8, 1; 250-254
1898-617X
2084-4557
Pojawia się w:: Proceedings of ECOpole
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effectiveness of Carbon Monoxide Concentration Reduction on Active Carbon Contact System in Burning Polystyrene Foam
Autorzy:: Fikri, E.
Veronica, A.
Powiązania:: https://bibliotekanauki.pl/articles/123480.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: polystyrene foam
particle size
activated carbon
carbon monoxide
Opis:: One of the wastes generated by PT Beton Elemenindo Perkasa is polystyrene foam waste. Processing of this type of waste is still done with open burning so it has an impact on health and the environmental quality degradation. One of the polystyrene foam waste processing technologies is by constructing a combustion furnace equipped with carbon filter. Activated carbon is one of the air filter media that can absorb harmful gases from the combustion process. The purpose of this research is to identify the effectiveness of carbon monoxide (CO) concentration reduction on active carbon contact system using variation of particle size. This research is a kind of an experimental study involving post test with control design. The number of samples was calculated based on the number of treatments and the number of repetitions in the study. This research used 2 kinds of treatment, including 20 mesh and 30 mesh in 9 repetitions. Independent T-Test statistical analysis showed a significant difference (p-value = 0.001) between the variation of particle size of activated carbon and the CO parameters with the average of the most effective reduction percentage on particle-sized active carbon of 30 mesh was 77.95%.
Źródło:: Journal of Ecological Engineering; 2018, 19, 4; 1-6
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Operating Parameters Effect on Adsorptive Desulphurisation Process of Diesel Oil
Autorzy:: Kalam, M. F.
Schütz, W.
Powiązania:: https://bibliotekanauki.pl/articles/342386.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
Tematy:: desulphurisation
diesel oil
adsorption
activated carbon (AC)
Opis:: The vision of this research was to investigate the removal of thiophene sulphur compounds from high sulphur content (1.3%) diesel oil by adsorptive desulphurisation process using powdered activated carbon. The adsorptive desulphurisation process was performed under three different operating conditions such as amounts of activated carbon (g), treatment temperatures (°C) and stirring time (minutes). Results showed that these operating parameters influence the removal of sulphur compounds from diesel oil. The maximum desulphurisation obtained was 76.16%.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Gdyni; 2018, 106; 41-47
1644-1818
2451-2486
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Gdyni
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Modification of activated carbons for application in adsorption cooling systems
Autorzy:: Wolak, Eliza
Vogt, Elżbieta
Szczurowski, Jakub
Powiązania:: https://bibliotekanauki.pl/articles/298146.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: activated carbon
hydrophobization
modification
heat of wetting
Opis:: In this paper commercially available activated WD-extra carbon (Gryfskand) which is applied for water treatment was used. Activated carbon was modified by the following chemical agents: H2O2, HNO3 and HCl. Chemical modifications significantly affect the chemical, structural and surface properties of activated carbons. Hydrophobization with ethereal stearic acid was performed on the raw material and samples after chemical modification. Hydrophobic properties of the samples were specified. The relationship of the chemical modification agents with hydrophobization degree was indicated. The thermal effects of wetting by methanol was measured. The heat of wetting was calculated. The purpose of the work was to modify the WD carbon properties to obtain an adsorbent for cooling systems characterized by both good thermal capacity and moisture resistance. The modifying chemical substances applied accounted for an increase in the concentration of the acid functional groups. The hydrophobized and HCl-modified WD(HCl) carbon has the best hydrophobized properties. The results of studies describing such modifications allow to conclude that the use of hydrophobic materials may lead to the production of sorbents with new functions facilitating their storage and use.
Źródło:: Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(1); 87-98
1505-4675
2083-4527
Pojawia się w:: Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Modeling of the carbon in pulp (cip) process in gold cyanide leaching plants using the plant data
Autorzy:: Sayiner, B.
Powiązania:: https://bibliotekanauki.pl/articles/110084.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: modeling
cyanide leaching
activated carbon
adsorption
gold
Opis:: An improved method to model CIP plants by plant data is presented. The Turkish gold cyanide leaching CIP plants, Bergama Ovacik, Gumushane Mastra and Eskisehir Kaymaz were modeled by using gold concentrations of monthly carbon, solution and solids spot samples of adsorption tanks without a need of laboratory work. Five carbon adsorption models were used namely k-n, Nicol-Fleming, Dixon, Film Diffusion with Langmuir isotherm and Film Diffusion with Freundlich isotherm (Johns model). Several monthly obtained plant data were collected and modeled separately and model parameters as well as regression coefficient R2 values were found by non-linear regression. By comparing R2 values, the best fit model for the three CIP plants was determined as Film Diffusion with Langmuir Isotherm that R2 values were above 0.95. Thus, by using the best fit model, the Kaymaz plant was optimized for existing 49 Mg per hour ore feed tonnage and plant parameters were predicted according to planned feed tonnage increase to 120 Mg per hour.
Źródło:: Physicochemical Problems of Mineral Processing; 2014, 50, 2; 841-852
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Improving the carbon dioxide uptake efficiency of activated carbons using a secondary activation with potassium hydroxide
Autorzy:: Zgrzebnicki, M.
Michalczyszyn, E.
Wrobel, R. J.
Powiązania:: https://bibliotekanauki.pl/articles/778515.pdf
Data publikacji:: 2018
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: activated carbon
activation
pore size distribution
DFT
Opis:: Secondary activation of commercial activated carbon (AC) ORGANOSORB 10-CO was carried out at 600, 700 and 800°C with mass ratios of potassium to AC (K/AC) in range 1–3. Crucial samples have shown following CO₂ uptakes and SSA – 3.90 mmol/g and 1225 m²/g, 4.54 mmol/g and 1546 m²/g, 4.28 and 1717 m²/g for pristine material and samples obtained at 700°C with K/AC = 2 and at 800°C with K/AC = 3 respectively. Last sample also indicated significant mesopore volume increase in diameter range 2–5 nm, from 0.11 to 0.24 cm3/g. CO₂ uptake increase was explained by formation of micropores up to diameter of 0.8 nm, which distribution was established from CO₂ sorption using DFT. Surface chemistry of all samples has not changed during modification, what was proven by XPS. Moreover, deeper incorporation of potassium ions into graphite at higher temperatures was observed as confirmed with EDS, XPS and XRD.
Źródło:: Polish Journal of Chemical Technology; 2018, 20, 3; 87-94
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Activated carbons prepared from hazelnut shells, walnut shells and peanut shells for high CO2 adsorption
Autorzy:: Lewicka, K.
Powiązania:: https://bibliotekanauki.pl/articles/778748.pdf
Data publikacji:: 2017
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: activated carbon
biomass
nutshells
CO2 adsorption
Opis:: Research treats about producing activated carbons for CO₂ capture from hazelnut shells (HN), walnut shells (WN) and peanut shells (PN). Saturated solution of KOH was used as an activating agent in ratio 1:1. Samples were carbonized in the furnace in the range of temperatures 600°C–900°C. Properties of carbons were tested by N2 adsorption method, using BET equation, DFT method and volumetric CO₂ adsorption method. With the increase of carbonization temperature specific surface area of studied samples increased. The largest surface area was calculated for samples carbonized at 900°C and the highest values of CO₂ adsorption had samples: PN900 at 0°C (5.5 mmol/g) and WN900 at 25°C (4.34 mmol/g). All of the samples had a well-developed microporous structure.
Źródło:: Polish Journal of Chemical Technology; 2017, 19, 2; 38-43
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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