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Wyświetlanie 1-15 z 210
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
Artykuł
Tytuł:
Hierarchical Carbon Fiber-Carbon Nanotubes by Using Electrospray Deposition Method with Preserved Tensile Properties
Autorzy:
Zakaria, Muhammad Razlan
Akil, Hazizan Md
Omar, Mohd Firdaus
Al Bakri Abdullah, Mohd Mustafa
Rahim, Shayfull Zamree Abd
Nabiałek, Marcin
Wysłocki, Jerzy J.
Powiązania:
https://bibliotekanauki.pl/articles/2174561.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hybrid materials
carbon nanotubes
carbon fiber
Opis:
In this study, the electrospray deposition (ESD) method was used to deposit carbon nanotubes (CNT) onto the surfaces of carbon fibers (CF) in order to produce hybrid carbon fiber-carbon nanotubes (CF-CNT) which is rarely reported in the past. Extreme high-resolution field emission scanning electron microscopy (XHR-FESEM), high-resolution transmission electron microscopy (HRTEM) and x-ray photoelectron spectroscopy (XPS) were used to analyse the hybrid carbon fiber-carbon nanotube (CF-CNT). The results demonstrated that CNT was successfully and homogenously distributed on the CF surface. Hybrid CF-CNT was then prepared and compared with CF without CNT deposition in terms of their tensile properties. Statistically, the tensile strength and the tensile modulus of the hybrid CF-CNT were increased by up to 3% and 25%, respectively, as compared to the CF without CNT deposition. The results indicated that the ESD method did not cause any reduction of tensile properties of hybrid CF-CNT. Based on this finding, it can be prominently identified some new and significant information of interest to researchers and industrialists working on CF based products.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1299--1304
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reconstruction of postglacial paleoproductivity in Long Lake, King George Island, West Antarctica
Autorzy:
Yoon, Ho-Il
Khim, Boo-Keun
Lee, Kyung
Park, Yu-Hyeon
Yoo, Kyu-Cheul
Powiązania:
https://bibliotekanauki.pl/articles/2051902.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
lake sediment
paleoclimate
diatoms
organic carbon
carbon isotopes
Źródło:
Polish Polar Research; 2006, 27, 3; 189-206
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of Carbide Interfacial Layer Formed During Deposition of DLC Films on 316L Stainless Steel Substrate
Autorzy:
Dudek, M.
Powiązania:
https://bibliotekanauki.pl/articles/354300.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
RF PECVD
carbon films
diamond like carbon film
film growth
carbides formation
Opis:
The paper presents the analysis of formation of interfacial layer during deposition of diamond like carbon film (DLC) on the 316L stainless steel by capacitive plasma discharge in the CH4 atmosphere. The structure of the interfacial layer of DLC film was strongly affected by the temperature increase during the initial stages of the process. Initially, thin interfacial layer of 5 nm has been formed. As the temperature had reached 210°C, the second phase of the process was marked by the onset of carbon atoms diffusion into the steel and by the interface thickness increase. Finally, the growth of chromium carbide interface, the upward diffusion of chromium and nickel atoms to film, the etching and the decrease of the DLC film thickness were observed at 233°C. These investigations were carried out ex-situ by spectroscopic ellipsometry, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2211-2216
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Benzene and Toluene Removal by Carbon Nanotubes from Aqueous Solution
Autorzy:
Bina, B.
Amin, M. M.
Rashidi, A.
Pourzamani, H.
Powiązania:
https://bibliotekanauki.pl/articles/204889.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carbon nanotubes
benzene
isofit
toluene
Opis:
The removal of benzene (B) and toluene (T) from aqueous solution by multi walled, single walled, and hybrid carbon nanotubes (MWCNTs, SWCNTs, and HCNTs) was evaluated for a nanomaterial dose of 1 g/l, concentration of 10-100 mg/l, and pH 7. The equilibrium amount removed by SWCNTs (B: 9.98 mg/g and T: 9.96 mg/g) was higher than for MWCNTs and HCNTs. Toluene has a higher adsorption tendency on CNTs than benzene, which is related to the increasing water solubility and the decreasing molecular weight of the compounds. The SWCNTs performed better for B and T sorption than the MWCNTs and HCNTs. Isotherms study based on isofit program indicate that the Generalized Langmuir-Freundlich (GLF) isotherm expression provides the best fit for benzene sorption, and that Brunauer-Emmett-Teller (BET) isotherm is the best fit for toluene adsorption by SWCNT. SWCNTs are efficient B and T adsorbents and possess good potential applications to water and wastewater treatment and maintain water of high quality that could be used for cleaning up environmental pollution.
Źródło:
Archives of Environmental Protection; 2012, 38, 1; 3-25
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Carbon Particle in Polymer Matrix Composite over Mechanical Properties and Tribology Behavior
Autorzy:
Sravanthi, K.
Mahesh, V.
Nageswara Rao, Boggarapu
Powiązania:
https://bibliotekanauki.pl/articles/2049147.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carbon
epoxy
CNT
mechanical
tribological
Opis:
In this research, the carbon particle dispersions are made in two different levels as carbon nano tube (CNT) and carbon particle in microns range. The mechanical strength is evaluated for the composites developed by axial loading and bending test analysis. In addition, the air jet abrasive particle erosion study is performed for different angle of impingement. The dispersion of carbon particle in the matrix material has reduced the mechanical strength. The sample with 4% of CNT dispersion in the composite has a maximum strength of 143 MPa and a minimum strength of 112 MPa. For the same combination (4% of CNT composite), the maximum flexural strength is 116 MPa. It is clear to infer that the strength of CNT in matrix materials is superior to the increase in length of carbon particle. The dispersion of carbon particle in the matrix material increases the brittleness and the strength is diminished. During the flexural bending, the fiber delamination occurred with severe deformation in the plain composite. When the materials are subjected to impingement of solid particle, the attrition effect on the exposed surfaces is vulnerable towards erosive mechanism. The presence of carbon in the matrix material has significantly increased the surface property. The results are appreciable for 4% of CNT composite. Especially at 30º, the minimum erosive wear 0.0033 g/g has been recorded. Erosive wear is less at minimum impingement angle and the wear is found increasing at higher impingement angle. Therefore, it is recommended not to add carbon particle to a higher weight percentage, since it leads to brittleness.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 1171-1178
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Municipal Sewage Sludge under Salix Plantations on Dissolved Soil Organic Carbon Pools
Wpływ osadów ściekowych na plantacjach Salix na zawartość węgla rozpuszczonego w glebie
Autorzy:
Kalisz, B.
Lachacz, A.
Glazewski, R.
Klasa, A.
Powiązania:
https://bibliotekanauki.pl/articles/204901.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
osad ściekowy
wskaźnik jakości węgla
zmiany organiczne
potencjalne utlenianie węgla
carbon management index
hot water-extractable carbon
organic amendments
potentially oxidizable carbon
Opis:
Labile fractions of organic matter can rapidly respond to changes in soil and they have been suggested as sensitive indicators of soil organic matter. Two labile fractions of organic carbon in the soils amended with fresh municipal sewage sludge in two rates (equivalent of 60 kg P ha-1 and 120 kg P ha-1) were studied. Soils under studies were overgrown with Salix in Germany, Estonia and Poland. In Polish soils application of sewage sludge increased the content of both labile organic carbon fractions (KMnO4-C and HWC) for a period of one year. Estonian soils were stable and no distinct changes in labile organic carbon fractions occurred.
Labilne frakcje materii organicznej mogą być wyrazem zmian zachodzących w glebie i stanowią one wskaźniki jakości materii organicznej. Badano dwie frakcje labilnego węgla organicznego w glebach nawożonych osadem ściekowym w dwóch dawkach (będące równoważnikiem 60 kg P ha-1 i 120 kg P ha-1). Badane gleby były porośnięte gatunkami wierzby krzewiastej w Niemczech, Estonii i Polsce. W badanych glebach w Polsce zastosowanie osadów ściekowych spowodowało wzrost obu analizowanych frakcji węgla (KMnO4-C i HWC). Natomiast gleby estońskie były stabilne i nie stwierdzono zmian w labilnych frakcjach węgla organicznego.
Źródło:
Archives of Environmental Protection; 2012, 38, 4; 87-97
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Characterization of Ni-CNT Composites by Electrical Explosion of Wire in Different Liquids
Autorzy:
Thuyet-Nguyen, M.
Maithili-Biswas, Maithili-Biswas
Kim, W. J.
Kim, J.-C.
Powiązania:
https://bibliotekanauki.pl/articles/958201.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Nickel-Carbon nanotubes composite
carbon nanotubes
electrical explosion of wire
nano-colloid
magnetic properties
Opis:
In this study, Ni-CNT powders and colloids were synthesized via the Electrical explosion of wire (EEW) in different liquid conditions. The influence of ambient solvents (D.I. Water, ethanol, methanol, acetone and ethylene-glycol) on characteristics of the as-synthesized Ni-CNT was investigated. The morphology and size were observed by field emission scanning electron microscopy (FE-SEM). The Ni particles were spherical or near spherical shape. The phase of the composite powders analyzed via X-ray diffraction demonstrate the presence of CNTs in composite powders is not affect the structure of Ni. However, the phase of the composites was changed based on the changing of liquid conditions. Stability of colloids was investigated by Turbiscan technique. Magnetic properties were also investigated by Vibrating sample magnetometer (VSM) at room temperature. The as-synthesized composite powders revealed a ferromagnetic characteristic material.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1219-1223
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ferrite Decarburization of High Silicon Spring Steel in Three Temperature Ranges
Autorzy:
Zhao, F.
Zhang, C. L.
Liu, Y. Z.
Powiązania:
https://bibliotekanauki.pl/articles/350822.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
surface decarburization
steel
oxidation
carbon diffusion
Opis:
Surface decarburization of high silicon spring steel in ambient air was studied. The experimental results confirmed the decarburized mechanism under AC1 temperature, in the temperature range of AC1-AC3 and AC3-G. Under AC1 temperature, pearlite spheroidization and surface decarburization are carried out simultaneously and pearlite spheroidization is reinforced. Considering the oxidation loss depth, the “true ferrite decarburized depth” at 850 °C (AC3-G) is still smaller than that at 760°C (AC1-AC3). That is because an “incubation period” must pass away before ferrite decarburization occurs in the temperature range of AC3-G, and the ferrite decarburized rate is limited to being equal to the partial decarburized rate.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1715-1722
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific Bending and Compressive Strenght of Poly(Vinyl Alcohol)-CNT Composites
Autorzy:
Zygoń, P.
Nitkiewicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/351718.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carbon nanotubes
composites
mechanical strength
density
Opis:
Carbon nanotubes are one of the strongest materials of unique mechanical, optical, electrical and electronic properties. Because of that they are mainly used as semiconductor materials constituting the reinforcing phase in composite materials. The paper presents properties of polymer composites reinforced with carbon nanotubes (CNT) containing various mixtures of dispersion. Produced composites featured various content carbon nanotubes: 20%, 30%, 40% i 50%. Macroscopic observations were carried out on ready to check composites, if pores exist in the structure and whether the reinforcement has been distributed in the entire volume. Bending and compressive strengths tests were performed and densities of individual composites were measured to determine the specific strength. Composite materials strengthened with carbon nanotubes feature a very low density and a very good mechanical strength, which makes them a good structural material.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 993-996
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Adsorption of oxytetracycline and ciprofloxacin on carbon-based nanomaterials as affected by pH
Autorzy:
Gamoń, Filip
Tomaszewski, Mariusz
Cema, Grzegorz
Ziembińska-Buczyńska, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/2173772.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption
ciprofloxacin
oxytetracycline
carbon-nanomaterials
Opis:
With the increase in use and application of carbon nanomaterials and the frequent presence of fluoroquinolones and tetracyclines antibiotics in the aquatic environment, their interactions have attracted extensive attention. In this study, adsorption of two antibiotics: oxytetracycline (OTC) and ciprofloxacin (CIP) by four carbon-based nanomaterials (graphene oxide, reduced graphene oxide, multiwalled carbon-nanotubes, oxidized multiwalled carbon-nanotubes) affected by pH was investigated. The experiment was performed in two steps: (i) adsorption of OTC and CIP at different pH values, (ii) adsorption isotherm studies of both antibiotics on four carbon-based nanomaterials. Both steps were conducted using the batch equilibration technique. The results showed that the adsorption of both antibiotics on studied adsorbents was highly pH-dependent. The highest adsorption was obtained at pH 7.0, implying the importance of the zwitterionic antibiotics forms to adsorption. Antibiotics adsorption isotherms at three given pH values followed the order of pH 7.0 > 1.0 > 11.0, which confirmed zwitterionic species of OTC and CIP as having the greatest ability to adsorb on carbonaceous nanomaterials. Electrostatic interaction, π-π EDA interaction, hydrophobic interaction for both antibiotics, and additionally hydrogen bond for CIP were possible mechanisms responsible for OTC and CIP adsorption onto studied nanomaterials. These results should be important to understand and assess the fate and interaction of carbon-based nanomaterials in the aquatic environment. This study can also be important for the use of carbon nanomaterials to remove antibiotics from the environment.
Źródło:
Archives of Environmental Protection; 2022, 28, 2; 34--41
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CNTFET Based OTRA and its Application as Inverse Low Pass Filter
Autorzy:
Prasad, Dinesh
Tayal, Divyam
Yadav, Ayesha
Singla, Laxya
Haseeb, Zainab
Powiązania:
https://bibliotekanauki.pl/articles/227047.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carbon nanotube (CNT)
Operational Transresistance Amplifier (OTRA)
Opis:
Operational Transresistance Amplifier (OTRA) has been a topic of great interest recently. OTRA has proved itself to be an appropriate device for the analog applications. As MOS scaling suffers from various problems, carbon nanotube field effect transistor (CNTFET) has came into light as one of the brightest alternative for FET (Field Effect Transistors) based devices. This work has introduced a new CNTFET based OTRA which is capable of realising inverse low pass filter using two OTRAs and few passive elements. CNTFET based OTRA has been designed and simulated at 10nm technology node. The working ability of the designed model has been conformed using HSPICE simulation. It is compared with conventional CMOS based OTRA. The comparative analysis has revealed improvement in various performance parameters. The paper also presents how change in number of carbon nanotube in CNTFETs in OTRA circuit affects the transresistance gain and input impedance. The optimized results are also discussed to improve transresistance gain and input impedance. The paper also dealt with the realisation of inverse low pass filter using proposed CNTFET based OTRA.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 665-670
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon dioxide in the tundra soils of SW Spitsbergen and its role in chemical denudation
Autorzy:
Pulina, Marian
Burzyk, Jerzy
Burzyk, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/2052066.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
Hornsund
carbon dioxide
chemical denudation
Źródło:
Polish Polar Research; 2003, 24, 3-4; 243-260
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Annual study of phytoplankton in Admiralty Bay, King George Island, Antarctica
Autorzy:
Kopczyńska, Elżbieta E.
Powiązania:
https://bibliotekanauki.pl/articles/2052554.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phytoplankton annual cycle
cell carbon biomass
Antarctica
Źródło:
Polish Polar Research; 1996, 17, 3-4; 151-164
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
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