EFFECTS OF ACTIVATED-CARBON-FABRIC PARAMETERS ON RESPONSE OF A NEW POLYCARBONATE-BASED INDIVIDUAL AND ENVIRONMENTAL RADON MONITOR

2019 ◽  
Vol 184 (3-4) ◽  
pp. 466-469
Author(s):  
M Sohrabi ◽  
F Ebrahiminezhad
Keyword(s):  
Activated Carbon ◽  
Thermal Annealing ◽  
Active Sites ◽  
Amplification Factor ◽  
Electrochemical Etching ◽  
Track Detector ◽  
Basic Design ◽  
Carbon Fabric ◽  
Parametric Studies ◽  
Radon Monitor

Abstract A new multi-purpose polycarbonate track detector (PCTD)/activated-carbon-fabric (ACF) radon monitor has been recently developed in our laboratory, a basic design of which was used for parametric studies. One 500 μm thick PCTD (3 cm x 3 cm) is used bare for detecting alphas from radon and progeny directly from air and another PCTD (3 cm x 3 cm) covered by an ACF layer (PCTD/ACF) to enhance the PCTD response by radon adsorption on its carbon active sites. The PCTDs were processed by 50 Hz−2 kV electrochemical etching method. The ACF/PCTD sensitivity was enhanced in respect to the PCTD/bare with an amplification factor (AF) defined as ratio of track density on PCTD under ACF to that of PCTD bare. Many ACF-related parameters studied affect the PCTD/ACF response among them thermal annealing of ACF, ACF thickness and distance of ACF layer to the PCTD are reported and discussed in this paper.

Constructing efficient hcp-Co active sites for Fischer-Tropsch reaction on an activated carbon supported cobalt catalyst via multistep activation processes

Fuel ◽  
2021 ◽  
Vol 292 ◽  
pp. 120244
Author(s):  
Hong Du ◽  
Miao Jiang ◽  
Hejun Zhu ◽  
Chuande Huang ◽  
Ziang Zhao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Active Sites ◽  
Cobalt Catalyst ◽  
Fischer Tropsch

The Selective Oxidation of Hydrocarbons on Isolated Iron Active Sites under Ambient Conditions

2019 ◽  
Vol 41 (6) ◽  
pp. 946-946
Author(s):  
Zhengliang Qi Zhengliang Qi ◽  
Junmei Liu Junmei Liu ◽  
Wanwan Guo and Jun Huang Wanwan Guo and Jun Huang
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Carbon Material ◽  
Active Sites ◽  
High Selectivity ◽  
Good Activity ◽  
Ambient Conditions ◽  
Oxidation Of Hydrocarbons ◽  
Fe Catalysts ◽  
Iron Active Sites

The N-doped carbon material supported Fe catalysts were developed for the oxidation of C-H bond of hydrocarbons to ketones and alcohols. The supported Fe catalysts were prepared by pyrolysis of [CMIM]3Fe(CN)6 ionic liquid in activated carbon. And the Fe(Ⅲ)@CN-600 showed good activity and high selectivity for the oxidation of alfa C-H bond of alkylbenzenes. The isolated Fe(Ⅲ) iron active sites should be responsible for the high activity and selectivity for the oxidation of hydrocarbons to ketones. Several ketones were obtained in good to excellent yields. Moreover, cyclohexanone can also be obtained through the oxidation of cyclohexane.

PREPARATION AND CHARACTERIZATION OF ACTIVATED CARBON FROM OIL PALM EMPTY FRUIT BUNCH WASTES USING ZINC CHLORIDE

2015 ◽  
Vol 74 (11) ◽  
Author(s):  
Riry Wirasnita ◽  
Tony Hadibarata ◽  
Abdull Rahim Mohd Yusoff ◽  
Zainab Mat Lazim
Keyword(s):  
Activated Carbon ◽  
Zinc Chloride ◽  
Oil Palm ◽  
Active Sites ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Proximate Analysis ◽  
Infrared Spectrometry ◽  
Empty Fruit Bunch

An oil palm empty fruit bunch-derived activated carbon has been successfully produced by chemical activation with zinc chloride and without chemical activation. The preparation was conducted in the tube furnace at 500oC for 1 h. The surface structure and active sites of activated carbons were characterized by means of Fourier transform infrared spectrometry and field emission scanning electron microscopy. The proximate analysis including moisture content, ash content, bulk density, pH, and pH at zero charge was conducted to identify the psychochemical properties of the adsorbent. The results showed that the zinc chloride-activated carbon has better characteristics compared to the carbon without chemical activation.  

Wide-temperature range operation supercapacitors from nanostructured activated carbon fabric

2009 ◽  
Vol 193 (2) ◽  
pp. 944-949 ◽  
Author(s):  
Kaihsuan Hung ◽  
Charan Masarapu ◽  
Tsehao Ko ◽  
Bingqing Wei
Keyword(s):  
Activated Carbon ◽  
Wide Temperature Range ◽  
Carbon Fabric ◽  
Temperature Range

Adsorption of dinitrogen tetroxide on activated carbon fabric derived from novolacs

2017 ◽  
Vol 25 (10) ◽  
pp. 589-601 ◽  
Author(s):  
Ornella Ursini ◽  
Giancarlo Angelini ◽  
Franco Cataldo
Keyword(s):  
Activated Carbon ◽  
Carbon Fabric ◽  
Dinitrogen Tetroxide

Adsorption ofShewanella oneidensisMR-1 to the electrode material activated carbon fabric

2018 ◽  
Vol 93 (10) ◽  
pp. 3000-3010 ◽  
Author(s):  
Florian Mayer ◽  
Markus Stöckl ◽  
Thomas Krieg ◽  
Klaus-Michael Mangold ◽  
Dirk Holtmann
Keyword(s):  
Activated Carbon ◽  
Electrode Material ◽  
Carbon Fabric

scholarly journals Energy Efficient and Intermittently Variable Ammonia Synthesis over Mesoporous Carbon-Supported Cs-Ru Nanocatalysts

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 406 ◽  
Author(s):  
Masayasu Nishi ◽  
Shih-Yuan Chen ◽  
Hideyuki Takagi
Keyword(s):  
Activated Carbon ◽  
Mesoporous Carbon ◽  
Active Sites ◽  
Carbon Materials ◽  
Ammonia Synthesis ◽  
Molar Ratios ◽  
Free Hydrogen ◽  
Catalytically Active ◽  
Ru Species ◽  
Mesoporous Carbon Materials

The Cs-promoted Ru nanocatalysts supported on mesoporous carbon materials (denoted as Cs-Ru/MPC) and microporous activated carbon materials (denoted as Cs-Ru/AC) were prepared for the sustainable synthesis of ammonia under mild reaction conditions (<500 °C, 1 MPa). Both Ru and Cs species were homogeneously impregnated into the mesostructures of three commercial available mesoporous carbon materials annealed at 1500, 1800 and 2100 °C (termed MPC-15, MPC-18 and MPC-21, respectively), resulting in a series of Cs-Ru/MPC catalysts with Ru loadings of 2.5–10 wt % and a fixed Cs loading of 33 wt %, corresponding to Cs/Ru molar ratios of 2.5–10. However, the Ru and Cs species are larger than the pore mouths of microporous activated carbon (shortly termed AC) and, as a consequence, were mostly aggregated on the outer surface of the Cs-Ru/AC catalysts. The Cs-Ru/MPC catalysts are superior to the Cs-Ru/AC catalyst in catalysing mild ammonia synthesis, especially for the 2.5Cs-10Ru/MPC-18 catalyst with a Ru loading of 10 wt % and a Cs/Ru ratio of 2.5, which exhibited the highest activity across a wide SV range. It also showed an excellent response and stability during cycling tests over a severe temperature jump in a short time, presumably due to the open mesoporous carbon framework and suitable surface concentrations of CsOH and metallic Ru species at the catalytically active sites. This 2.5Cs-10Ru/MPC-18 catalyst with high activity, fast responsibility and good stability has potential application in intermittently variable ammonia synthesis using CO2-free hydrogen derived from electrolysis of water using renewable energy with fast variability.

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