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1
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Physicochemical Problems of Mineral Processing
EN In this study, the possibilities of using Manisa-Gördes district tuffs having important deposits rich of clinoptilolites have been investigated for the removal of heavy metal ions from industrial wastewaters. Adsorption of ammonium and metal cations such as Pb++, Cu++, Cd++ and Zn++ ions from aqueou[...]
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Polish Journal of Chemistry
EN The adsorption of polar trichloroethene and non-polar tetrachloroethene on natural zeolites and MCM-41 was investigated at 298Kusing the static method and at 355–413K using the dynamic method. The textural properties of adsorbents were determined by nitrogen adsorption at 77Kand the energetic proper[...]
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Polish Journal of Chemistry
EN The influence of zeolite nature on catalytic activity of Co-containing systems of CO oxidation was investigated. It is established that the activity of catalysts increases in the order 10%Co-NaA < 10%Co-NaM < 10%Co-NaZSM-5(37) < 10%Co-NaZSM-5(69). The cobalt spinelCoCo2O4 formed on the surface of ze[...]
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Polish Journal of Chemistry
EN Processes of isobutane with butenes alkylation with the purpose of obtaining the high octane gasoline component (alkylate), being environmentally detrimental due to use of concentrated H2SO4 or HF acids as catalysts, are nevertheless of great industrial importance supplying the world market with app[...]
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Polish Journal of Chemistry
EN This paper reports the study of the relation between sulphur dioxide adsorption and sulphur dioxide removal degree from exhaust gases on DESONOX type catalysts based on the synthetic zeolite Sipernat impregnated with vanadium ions by the double impregnation method, with the use of the EDTA solution [...]
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Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje
EN The zeoforming, a newer process, is rarely used in the petroleum industry. The zeoforming plant in the Glimar S.A. Refinery has produced unleaded gasoline for the last few years. The activity of two ZSM-5 catalysts (A and B) used in the zeoforming process was differentiated in proposed laboratory te[...]
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Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje
EN Pt-Re zeolite-containing catalysts of a high isomerization activity in reforming at mild conditions (T=623 K, P=1.0 MPa) are developed. The desired products which meet the environmental requirements were produced. The structure and active centers of catalyst were studied by TEM, BET, IR spectroscopy[...]
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Polish Journal of Chemistry
EN A lattice model is proposed for describing the diffusion of small molecules in silicalite, as a special example of zeolite. The lattice structure matches the interlacing of the silicalite channels and the molecules hop randomly from site to site according to simple rules. The diffusion of a single m[...]
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Polish Journal of Chemistry
EN The activity of Co-zeolites with MFI, BEA,MORand FER topologies was studied in propane oxidative dehydrogenation. The products of oxidative dehydrogenation of propane were propene, CO, CO2 and a very small amount of ethene and methane as products of cracking, which play only a minor role. The sequen[...]
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Gaz, Woda i Technika Sanitarna
2003 Nr 6 215-218
EN Characteristics of modified zeolite. Kinetics of ortophosphate ions removal. Influence of zeolite and reagents dose on the effect of ortophosphate ions removal. Influence of zeolite and reagents on model solution quality.
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Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska
EN The preparation technique of zinc exchanged zeolite antibacterial material for environment decontamination is investigated in the paper. A intermediate of the antibacterial material with 5.56wt% exchanged Zn2+ is obtained by optimizing all the relevant factors, and the stabilizing treatment of the m[...]
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Polish Journal of Chemistry
EN In this paper the authors compared the modified montmorillonite and synthetic zeolite used as supports of the DESONOX type catalyst with the standard catalyst based on MgO. The addition of DESONOX catalyst doped with vanadium ions to combusted hard coal (mass ratio coal to catalyst was 500:1) result[...]
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Budownictwo i Architektura
2015 Vol. 14, nr 1 127--134
EN The aim of this paper is estimation of the effect of zeolites addition on properties of asphalt and examination of possible application of zeolites in mix asphalt as a filler. The addition of zeolites to the mix asphalt is one of the ways used for reduction of technological temperatures by asphalt f[...]
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Journal of Education and Technical Sciences
EN Molecular mobility of water molecules has been investigated in the natural zeolite natrolite (Na2Al2Si3O10 ·2H2O) by 1H NMR. Spin-lattice relaxation times in the laboratory and rotating frames (T1 and T1-) have been measured as a function of temperature for a polycrystalline sample. It has been show[...]
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Journal of Ecological Engineering
2016 Vol. 17, nr 3 125--133
EN Nickel has been listed as a priory control pollutant by the United States Environmental Protection Agency (US EPA). Compared with other methods, the combination of vegetation and the addition of mineral sorbents to heavy metal-contaminated soils can be readily applied on a large scale because of the[...]
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Materials Science Poland
2007 Vol. 25, No. 3 637--647
EN The influence of the form of the Al-containing component, molar ratio of Na2O:Al2O3:SiO2, and the duration of isothermal curing under saturated steam at 180 st.C have been examined. The results obtained experimentally show that the form of the Al-containing component (Al(OH)3 or GammaAl2O3) signific[...]
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Materials Science Poland
2007 Vol. 25, No. 4 1149--1160
EN Clinoptilolite, a natural zeolite from the Semnan region in the West of Iran, has been converted to a catalyst for the methanol dehydration to dimethyl ether process. To produce such a catalyst and to create acidic sites on the latter, the ion-exchange process has been used. In addition, to investig[...]
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Physicochemical Problems of Mineral Processing
2011 Vol. 47 183-192
EN In this study grindability of zeolite was studied. The work index of zeolite was determined for three different test sieves. In terms of work indexes, there was insignificant difference between the test sieves. Additionally, the breakage rate and distribution parameters were also determined. The fas[...]
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Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje
EN Cracking catalysts based on zeolite HY, modified with heteropoly acids and decatiotionized clays of Tagan and Narynkol deposits (Kazakhstan), were studied. These catalysts have shown enhanced thermal stability and high activity. Higher cracking activity of catalysts containing the Narynkol clay was [...]
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Nukleonika
2013 Vol. 58, No. 3 351--357
EN Interaction of CO, NO, and O2 diatomics with NiII and NiI ions dispersed in ZSM-5 zeolite was investigated by electron paramagnetic resonance (EPR) spectroscopy and density functional theory (DFT) modelling. The resulting adducts NiI-CO, NiII-NO, and NiI-O2 were identified based on g-tensor paramete[...]
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