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Wyszukujesz frazę "Vu, Trung Tien" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Development of Support Plan and Operation Scheme for Semi-mechanized Longwall Face of Coal Seam 10T, Nam Khe Tam Mine – 86 Company, Dong Bac Corporation
Autorzy:
Vu, Trung Tien
Le, Tien Dung
Vu, Thai Tien Dung
Powiązania:
https://bibliotekanauki.pl/articles/2020148.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
mining technology
semi-mechanized
hydraulic prop
box bar
operation scheme
support plan
górnictwo
technologia
zarządzanie
Opis:
Support plans and operation schemes of mine faces are critical technical documents in underground coal mining management. The development and selection of a reasonable support plan and operation scheme of the face are complicated because they involve many factors. In specific mining conditions, developing and selecting an appropriate support plan and operation scheme will improve the working efficiency of equipment, increase labor productivity, and ensure workers' safety. This article researched a mining technology for the thin seams, focusing on coal seam 10T in Nam Khe Tam coal mine, 86 Coal Company. From the analysis of geo-mining conditions, the article developed and selected a reasonable support plan and operation scheme for the face in coal seam 10T. After being used in the field, the support plan and operation scheme have brought the face efficiency and safety.
Źródło:
Inżynieria Mineralna; 2021, 2; 321--330
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation of citronellal and geraniol from citronella (Cymbopogon winterianus) oil by vacuum fractional distillation: Effect of operating conditions on the separation
Autorzy:
Le, Minh-Trung
Vu, Duc-Phuong
Nguyen, Thanh Ngoc
Le, Xuan-Tien
Powiązania:
https://bibliotekanauki.pl/articles/27315670.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
citronellal
geraniol
vacuum
fractional distillation
citronella oil
Opis:
This study used fractional distillation to separate citronellal and geraniol from citronella (Cymbopogon winterianus) essential oil to improve their market value. The one-factor-at-a-time methodology investigated operating parameters’ optimum conditions and effects, including system pressure, packing types, and column height. All investigations were evaluated based on their main fraction’s citronellal and geraniol content and recovery. Regarding the effect of the variables, a higher system pressure improved the separation while increasing the temperature range of each fraction and distillation time. The packing types would also improve the separation by providing a large surface area. Finally, the column height also positively impacted the separation. In the optimum citronella oil fractionation, citronellal content experienced a 2.5-fold increase, from 37.68% to 94.33%. Geraniol purity reached 40.61% from an initial content of 17.33% in the raw CW oil. The distillation could recover up to 90.00% of citronellal and 68.18% of geraniol.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 4; 67--80
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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