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    Wyświetlanie 1-3 z 3
    Tytuł:
    Thermal and thermo-catalytic degradation of polyolefins as a simple and efficient method of landfill clearing
    Autorzy:
    Tomaszewska, K.
    Kałużna-Czaplińska, J.
    Jóźwiak, W. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/779208.pdf
    Data publikacji:
    2010
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    polietylen
    polipropylen
    poliolefin
    komunalne odpady z tworzyw sztucznych
    degradacja termiczna
    degradacja termokatalityczna
    składniki płynnego paliwa
    kinetyka
    polyethylene
    polypropylene
    polyolefins
    municipal waste plastics
    thermal degradation
    thermocatalytic degration
    liquid fuels component
    kinetics
    Opis:
    Thermal degradation of the low density polyethylene (LDPE), polypropylene (PP) and the municipal waste plastics was investigated. The thermo-catalytic degradation of LDPE and PP was studied in the presence of the following catalysts: four different types of montmorillonite: K5, K10, K20, K30 and – for comparison – zeolites (natural – clinoptilolite, Y Na+ and YH+). Thermal analyses TG-DTA-MS of polymers and polymercatalyst mixtures were carried out in an argon flow atmosphere in isothermal and dynamic conditions. The following order was found: in lowering the reaction temperature for LDPE degradation YH+> mK5 > mK20 = mK30 >mK10 > NZ > YNa+; for PP degradation: mK20 > mK5 = mK30 >mK10 > YH+> NZ >YNa+. The activity tests were carried out in a stainless steel batch reactor under atmospheric pressure in a wide temperature range of up to 410°C, and using the atmosphere of argon flow. The liquid products were analysed by the GC-MS method. The hydrocarbons in the liquid products from thermal degradation of polymers were broadly distributed in the carbon fractions of C8 to C26 – for LDPE and C6 to C31for PP.
    Źródło:
    Polish Journal of Chemical Technology; 2010, 12, 3; 50-57
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of the solubility of rock phosphate by co-composting it with organic components
    Autorzy:
    Korzeniowska, J.
    Stanisławska-Glubiak, E.
    Hoffmann, J.
    Górecka, H.
    Jóźwiak, W.
    Wiśniewska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/949430.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    compost
    straw
    sawdust
    beet pulp
    phosphorite
    phosphorus availability to plants
    Opis:
    One possible way to improve the solubility of phosphate rock is by co-composting it with organic substances. Four variants of composts were made in a biomass composting bioreactor. Ground phosphate rock (GPR) and shredded barley straw, pine sawdust as well as beet pulp pellets were used as compost components. The four composts were different from one another in the type and amount of organic components. The composts were granulated in a pelleting press. Changes in the solubility of phosphorus were assessed via chemical analyses and P-recovery efficiency calculated from the data achieved in a pot experiment. Solubility of ground phosphate rock was increased resulting from co-composting with organic substances, which meant that bioavailability of phosphorus increased. All the tested composts were characterized by a higher ratio of ammonium citrate soluble phosphorus to total phosphorus than non-composted GPR. Co-composting GPR with all the tested organic components yielded better effects than composting it with straw alone. The four composts were characterized by a slow release of P, which justifies our expectation that they will produce residual effects in the years following their application.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 4; 10-14
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of sulphur added to phosphate rock on solubility and phytoavailability of phosphorus
    Autorzy:
    Stanisławska-Glubiak, E.
    Korzeniowska, J.
    Hoffmann, J.
    Górecka, H.
    Jóźwiak, W.
    Wiśniewska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/779588.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    phosphate and sulphur fertilizers
    granulation
    compaction
    phosphate solubility
    phosphate bioavailability
    Opis:
    For ground phosphate rock (GPR) to be applied as phosphorus fertilizer, the availability of phosphorus to plants needs to be improved. One possible way to achieve this is by adding sulphur, which will accelerate decomposition of phosphate in soil owing to the activation of microbiological processes. This study involved granulation of fertilizers composed of phosphate and sulphur mixed at 38:1 and 10:1 ratios and two analogous fertilizer variants but with added molasses as a source of organic carbon for sulphur bacteria. A small-scale industrial installation for production of multi-component fertilizers was used to make granular fertilizer by the compaction method. The granular fertilizers were then tested in an agricultural experiment. The fertilizer in which the phosphate to sulphur ratio was 10:1 produced better effects. Addition of molasses to the fertilizers did not improve their fertilizing capacity.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 1; 81-85
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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