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    Wyświetlanie 1-3 z 3
    Tytuł:
    Oznaczanie cukrow typu rafinozy w nasionach roslin straczkowych metoda wysokocisnieniowej chromatografii cieczowej - HPLC
    Autorzy:
    Kosson, R
    Powiązania:
    https://bibliotekanauki.pl/articles/875743.pdf
    Data publikacji:
    1992
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    analiza chemiczna
    fasola
    chromatografia cieczowa
    zywnosc
    nasiona
    rosliny straczkowe
    weglowodory
    ekstrakcja
    chromatografia cieczowa wysokosprawna
    bob
    oznaczanie
    chemical analysis
    bean
    liquid chromatography
    food
    seed
    leguminous plant
    hydrocarbon
    extraction
    high performance liquid chromatography
    broad bean
    determination
    Opis:
    Opisano metodę ekstrakcji galaktocukrów gazotwórczych z nasion fasoli i bobu oraz ich ilościowego oznaczania techniką HPLC. Określono m.in. skład mieszaniny ekstrakcyjnej, sposób oczyszczania i skład fazy ruchomej.
    A method was developed for the determination of galactosugars: raflinose, stachiose and verbas-cose, In bean and broad bean seeds by high-pressune liquid chromatography. The effect of various concentrations of the ethanolic extraction solvent and of other solutions (methanol and acetonitrile) on the effectiveness of sugar extraction from bean was investigated. The optimal composition of the mobile phase was established. It was found that the effectiveness of raflinose and stachiose extraction from bean seeds was highest when 40-60% ethanol was the extraction solvent, and when the proportion of bean to the extraction solvent by weihgt was 2:25. The presented HPLC technique, as compared with gas chromatography, allows for threefold shortening of the duration of one chromatographic analysis.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1992, 43, 2; 179-185
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring of explosive gases with a portable gas detector Drager X-am 5600
    Autorzy:
    Macuda, J.
    Łukańko, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/298601.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    methane
    hydrogen sulfide
    measurement of methane concentration
    monitoring of explosive gases
    portable gas detector
    exploration of hydrocarbon deposits
    extraction of hydrocarbons
    tubing
    reservoir water
    Opis:
    During exploration and extraction of hydrocarbon deposits, the risk of elevated methane concentration above the lower explosive limit occurs. In some cases a higher concentration of hydrogen sulfide threatening the health and life of the crew also may be observed. The use of a portable gas detector Dräger X-am 5600 for constant monitoring of methane and hydrogen sulfide concentration in dangerous situations is proposed in the paper. Thanks to the IR sensors and modern electrochemical sensors, this detector allows for monitoring of 6 types of gases simultaneously. The applied infrared sensor IR EX allows for measuring explosive and combustible gases both within the lower explosive limit, and also measuring of methane in the range of 0 to 100 vol.%. The measured values are stored in the computer and also sent to the central through GSM.
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 2; 543-551
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Developing a complex of measures for liquid removal from gas condensate wells and flowlines using surfactants
    Autorzy:
    Volovetskyi, V.B.
    Doroshenko, Ya.V.
    Kogut, G.M.
    Rybitskyi, I.V.
    Doroshenko, J.I.
    Shchyrba, O.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175794.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    well
    gas
    flowline
    gas pipeline
    liquid removal
    hydrocarbon extraction
    internal cavity cleaning
    studnia
    gaz
    linia przepływu
    gazociąg
    usuwanie cieczy
    ekstrakcja węglowodorów
    czyszczenie wnęk wewnętrznych
    Opis:
    Purpose: The purpose of this work is to consider the complications that arise while operating gas condensate wells, in particular, the accumulation of hydrocarbon condensate, formation and condensation water at wells and flowlines, to develop a method for removing liquid from wells and flowlines before it entering a gas treatment unit and being treated with surfactants and to develop a method for the foam destruction in the gas-liquid flow. Design/methodology/approach: The operational parameters of gas-condensate wells of the Yuliivske oil and gas condensate field (OGCF) have been analysed. Wells have been identified that are operated in difficult conditions due to the accumulation of the liquid at the bottom hole and in flowlines. The volume of the liquid accumulated at the bottom hole of gas condensate wells is estimated. The quantity of surfactants, the volume and concentration of the solution required to remove the liquid were calculated individually for each well. The program of experimental researches has been made. The efficiency of the application of surfactant solution was experimentally determined and a positive result was achieved in the form of an increase in production by 10%. A new approach to the use of surfactant solution, as well as the foam destruction, has been proposed. The studies were performed within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: Comprehensive measures are proposed to increase the efficiency of gas condensate wells operation. They are monitoring of operational parameters of wells by pressure and temperature gauges installed at the wellhead and at the inlet gas pipelines of the gas treatment unit; calculation of the volume of accumulated fluid in the wellbore and flowline; installation of a complex of automated feeding a surfactant solution of both in the annulus of the wells and in the flowline. For this purpose, two options for the complex and and have a different principle of operation. To prevent foam from entering the gas treatment unit, a method of its destruction has been proposed. The implementation of the proposed comprehensive measures will allow controlling the well operation mode, timely liquid removal from the well and the flowline and ensure stable hydrocarbon production. Research limitations/implications: The obtained results of laboratory and experimental studies have shown that using a surfactant solution is reasonable to remove the liquid from gas condensate wells. To increase the efficiency of the measure, a new method of feeding surfactant solution was developed by installing a unit for automated feeding (UAF) of a surfactant solution at the mouth. Practical implications: The results of laboratory tests allow using a surfactant solution reasonably in order to remove the liquid from gas condensate wells, as well as possible further destruction of foam in the gas-liquid flow for increasing both the efficiency of the extraction and production volume. Originality/value: On the basis of previously performed experimental research, it has been established that it is advisable to use a surfactant solution to remove the liquid from gas condensate wells and flowlines. A new method of removing liquid from gas condensate wells and flowlines has been developed, as well as a method of destroying foam in a gas-liquid flow, which are original and can be implemented.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 108, 1; 24--41
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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