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Wyszukujesz frazę "Cherbański, Robert" wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Adsorption of bisphenol a from aqueous solutionsby activated tyre pyrolysis char – Effect of physicaland chemical activation
    Autorzy:
    Kuśmierek, Krzysztof
    Świątkowski, Andrzej
    Kotkowski, Tomasz
    Cherbański, Robert
    Molga, Eugeniusz
    Powiązania:
    https://bibliotekanauki.pl/articles/184855.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bisphenol A
    adsorption
    tyre pyrolysis
    char
    physical activation
    chemical activation
    bisfenol A
    adsorpcja
    piroliza opon
    aktywacja fizyczna
    aktywacja chemiczna
    Opis:
    This paper aims to show the effect of activation method of tyre pyrolysis char (TPC) on adsorptionof bisphenol A (BPA) from aqueous solutions. The TPC was produced from end-of-life-tyres (ELT)feedstock in a pilot plant at 773 K. Activation was accomplished using two classical methods: physicalactivation with CO2and chemical activation with KOH. The two produced adsorbents had pores rangingfrom micro- to macropores. Distinct differences in the BET surface areas and pore volumes betweenthe adsorbents were displayed showing better performance of the chemically activated adsorbent foradsorption of BPA from water.The results of the kinetic studies showed that the adsorption of BPA followed pseudo-second-orderkinetic model. The Freundlich, Langmuir, Langmuir–Freundlich and Redlich–Peterson isotherm equa-tions were used for description of the adsorption data. The Langmuir–Freundlich isotherm model bestfits the experimental data for the BPA adsorption on both adsorbents. The Langmuir–Freundlichmonolayer adsorption capacity,qmLF, obtained for the CO2-activated tyre pyrolysis char (AP-CO2)and KOH-activated tyre pyrolysis char (AP-KOH) were 0.473 and 0.969 mmol g
    Źródło:
    Chemical and Process Engineering; 2020, 41, 2; 129--141
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption of n-hexane on a low-cost adsorbent obtained from waste tyres and its microwave regeneration
    Autorzy:
    Kotkowski, Tomasz
    Cherbański, Robert
    Molga, Eugeniusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2173416.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    regeneracja mikrofalowa
    granulowany węgiel aktywny
    n-heksan
    microwave regeneration
    tyre pyrolysis char
    granular activated carbon
    n-hexane
    Opis:
    This work investigates adsorption of n-hexane on activated tyre pyrolysis char (ATPC) and granular activated carbon (GAC) as a reference material in a fixed-bed column. Microwave-assisted regeneration is also considered. The adsorbed amount of n-hexane on ATPC is in the range of 37–58 mg/g. Microwave-assisted desorption of ATPC samples enables the recovery of up to 95% of adsorbed n-hexane in this non-optimized microwave setup with the efficiency of microwave energy conversion into heat of only 5–6%. For the 50% breakthrough time, ATPC and GAC are able to purify the n-hexane gas volumes in the ranges of 20–90 and 935–1240 cm3/g, respectively. While adsorption kinetics is not satisfactorily described by pseudo-first and pseudo-second order kinetic models, it is very well reflected by a family of dynamic adsorption models, which are modelled with a single logistic function. Internal diffusion is likely the rate limiting step during adsorption on ATPC, while external and internal diffusion likely plays a role in adsorption to GAC. Although microwave-assisted regeneration is performed in a general purpose microwave reactor, both adsorbents show excellent performance and are very good candidates for the adsorption process. Preliminary results show that magnetite can further reduce microwave energy consumption.
    Źródło:
    Chemical and Process Engineering; 2022, 43, 1; 57--80
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tyre-derived activated carbon – textural propertiesand modelling of adsorption equilibrium of n-hexane
    Autorzy:
    Kotkowski, Tomasz
    Cherbański, Robert
    Molga, Eugeniusz
    Powiązania:
    https://bibliotekanauki.pl/articles/184985.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    adsorption
    n-hexane
    tyre-derived activated carbon
    pyrolysis
    tyres
    adsorpcja
    n-heksan
    węgiel aktywny pochodzący z opon
    piroliza
    opony
    Opis:
    There is general agreement that primary pyrolysis products of end-of-life tyres should be valorised toimprove the economics of pyrolysis. In this work, tyre pyrolysis char (TPC) is produced in a pyrolysispilot plant designed and built at our home university. The produced TPC was upgraded to tyre-derivedactivated carbon (TDAC) by activation with CO2, and then characterised using stereological analysis(SA) and nitrogen adsorption at 77 K. SA showed that the grains of TPC and TDAC were quasi-spherical and slightly elongated with a 25% increase in the mean particle cross-section surface area forTDAC. The textural properties of TDAC demonstrated the BET and micropore surface areas of 259 and70 m2/g, respectively. Micropore volume and micropore surface area were 5.8 and 6.7 times higher forTDAC than TPC at2nm, respectively. Then-hexane adsorption was investigated using experimentsand modelling. Eight adsorption isotherms along with three error functions were tested to model theadsorption equilibrium. The optimum sets of isotherm parameters were chosen by comparing sum ofthe normalized errors. The analysis indicated that the Freundlich isotherm gave the best agreementwith the equilibrium experiments. In relation to different activated carbons, the adsorption capacityof TDAC forn-hexane is about 16.2 times higher than that of the worst reference material and 4.3times lower than that of the best reference material. In addition, stereological analysis showed thatactivation with CO2did not change the grain’s shape factors. However, a 25% increase in the meanparticle cross-section surface area for TDAC was observed.
    Źródło:
    Chemical and Process Engineering; 2020, 41, 1; 25--44
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ethanol pool fire on a one-meter test tray – validation of CFD results
    Autorzy:
    Cherbański, Robert
    Rudniak, Leszek
    Machniewski, Piotr
    Molga, Eugeniusz
    Tępiński, Jarosław
    Klapsa, Wojciech
    Lesiak, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2173418.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ogień w basenie
    etanol
    CFD
    SBES
    pool fire
    ethanol
    large-scale
    Opis:
    The ethanol fire hazards will become more frequent due to the new established targets for the consumption of renewable energy sources. With this in mind, this paper aims to widen the current knowledge on CFD modelling of such a fire. As previous works rely heavily on the data of small pool fire diameters (below 1 m), this research deals with ethanol pool fire on a one-meter test tray, using our own experimental data. A mathematical model was developed and solved using a commercial CFD package (ANSYS Fluent). A new hybrid RANS-LES (SBES) model was employed to calculate turbulent stresses. Generally, the simulation results showed a good fit with the experimental results for flame temperatures at different elevations. In particular, a minor discrepancy was only observed for the top thermocouple (1.9 m above the tray). The flame heights computed with the CFD model were on average higher than the experimental one. Good agreement was observed for the radiative fraction and the axial temperature profile on the plume centreline. The latter showed an almost perfect fit between the temperature profiles obtained from CFD simulations and those calculated from the plume law for temperature.
    Źródło:
    Chemical and Process Engineering; 2022, 43, 1; 23--44
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of methane dry reforming over Ni/CaO–Al2O3 catalyst
    Autorzy:
    Cherbański, Robert
    Lewak, Michał
    Machniewski, Piotr
    Molga, Eugeniusz
    Franczyk, Ewelina
    Powiązania:
    https://bibliotekanauki.pl/articles/2086791.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dry methane reforming
    dimethyl ether
    nickel catalyst
    kinetics
    modelling
    eter dimetylowy
    katalizator niklowy
    kinetyka
    modelowanie
    Opis:
    This paper presents the results of investigations into dry methane reforming (DMR). The process was aimed at obtaining synthesis gas required for the production of dimethyl ether (DME). The effect of temperature, pressure and inlet gas composition on the process was determined in the experimental part of this work. The tests were carried out in a laboratory tubular reactor over a Ni/CaO–Al2O3 catalyst. The obtained experimental results were used to verify literature kinetic data and to develop a mathematical model of the DMR process.
    Źródło:
    Chemical and Process Engineering; 2021, 42, 3; 235--252
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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