Простий
пошук
Розширений
пошук
Покажчики
Професійний
пошук
Рубрикатор
НБУВ
Розподілений
пошук

Бази даних

Наукова періодика України - результати пошуку

Книжкові видання та компакт-диски
Журнали та продовжувані видання
Автореферати дисертацій
Реферативна база даних
Наукова періодика України
Тематичний навігатор
Авторитетний файл імен осіб
Mozilla Firefox Для швидкої роботи та реалізації всіх функціональних можливостей пошукової системи використовуйте браузер
"Mozilla Firefox"
Вид пошуку
Повнотекстовий пошук
 Знайдено в інших БД:Реферативна база даних (2)
Список видань за алфавітом назв:
A  B  C  D  E  F  G  H  I  J  L  M  N  O  P  R  S  T  U  V  W  
А  Б  В  Г  Ґ  Д  Е  Є  Ж  З  И  І  К  Л  М  Н  О  П  Р  С  Т  У  Ф  Х  Ц  Ч  Ш  Щ  Э  Ю  Я  

Авторський покажчик    Покажчик назв публікацій


Пошуковий запит: (<.>A=Bоndаrenkо V$<.>)
Загальна кількість знайдених документів : 2
Представлено документи з 1 до 2
1.

Bоndаrenkо V. I. 
Process pattern of heterogeneous gas hydrate deposits dissociation [Електронний ресурс] / V. I. Bоndаrenkо, K. S. Sаi // Науковий вісник Національного гірничого університету. - 2018. - № 2. - С. 21–28. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2018_2_5
Purpose - justification of the effective dissociation process parameters of heterogeneous gas hydrate deposits and elaboration of their classification according to the thermal energy consumption. The methodological basis of the conducted complex research is the analysis and synthesis of literary sources, devoted to studying the peculiarities and thermobaric properties of gas hydrates, analytical calculations and laboratory experiments on the thermal energy consumption for the efficient decomposition of gas hydrates, experimental studies of the hydrate formation process and gas hydrate deposits of the mottled structure dissociation. The parameters of formation and stable gas hydrate occurrence in natural environment, which should be taken into account when developing gas hydrate deposits, are substantiated. The existing classification of gas hydrate deposits in sedimentary rocks is analyzed. The regularities of the gas hydrate deposits dissociation process and methane gas production, depending on the percentage of rock intercalations content, are established. The volumes of analysis zones and gas output from heterogeneous gas hydrate deposits are determined. The amount of thermal energy that is necessary to be consumed to produce 1000 m<^>3 of hydrated gas during the gas hydrate deposits development, is calculated. It is established that the thermal energy consumption on the dissociation process in order to obtain methane gas varies with a parabolic dependency with an increase in the rock intercalations proportion in the gas hydrate deposit. A new classification of gas hydrate deposits, based on the content of rock intercalations and the amount of spent thermal energy for gas hydrate dissociation, has been developed. The results of studies with sufficient accuracy for practical application may be used in the development of the Black Sea gas hydrate deposits in order to obtain natural gas. The revealed dependencies of the methane gas output on the rock intercalation share are a tool for determining the effective application of technologies for the gas hydrate deposit development.
Попередній перегляд:   Завантажити - 206.378 Kb    Зміст випуску    Реферативна БД     Цитування
2.

Rakishev B. R. 
Influence of chemical reagent complex on intensification of uranium well extraction [Електронний ресурс] / B. R. Rakishev, V. I. Bоndаrenkо, М. М. Маtayev, Z. S. Kenzhetayev // Науковий вісник Національного гірничого університету. - 2019. - № 6. - С. 25-30. - Режим доступу: http://nbuv.gov.ua/UJRN/Nvngu_2019_6_6
Purpose. To determine the effect of special chemical reagents in the composition of leaching solutions on geotechnological parameters during uranium well extraction. To study the possibility of applying this method to increase efficiency of well extraction of uranium ores by intensifying ecotechnological processes of underground uranium leaching. To ensure design capacity of producing blocks and the completeness of extracting metal from them, reduce and prevent sediment in porous medium, reduce specific consumption of sulfuric acid, electric power, labor and other production costs in the process of uranium well extraction. Methodology. The research includes consistent literature review, laboratory and practical studies in real conditions. The samples studied in the laboratory by X-ray phase analysis of mineralogical characteristics of sedimentation were taken from Syrdarya depression. Chemical reagents were selected and tested in geotechnological wells during experimental extraction of uranium. The resulting geotechnological parameters of wells were compared to experimental data. Findings. Values of pH parameters of leaching solutions were obtained within the range from 6,5 to 2,3; it was established that Eh values initially tend to increase sharply to 300 - 380 mV and then to decrease to 170 mV; uranium content in productive solution was consistently growing from 29 to 146 mg/l; the values of iron salts (Fe<^>3+, Fe<^>2+) concentration in the productive solution were determined in the case when they were affected by chemical multifunctional reagents. Originality. The method for intensification of uranium well extraction has been developed and justified. It is based on a new complex of chemical reagents producing a selective effect on uraniferous minerals, which improves performance of producing blocks. Practical value. Rationally selected oxidizer and chemical reagents, as well as the scheme of their feeding into the productive horizon allow intensifying solution of four-valent uranium in complex mining and geological conditions by underground leaching and improving performance of the producing block.
Попередній перегляд:   Завантажити - 572.913 Kb    Зміст випуску    Реферативна БД     Цитування
 
Відділ наукової організації електронних інформаційних ресурсів
Пам`ятка користувача

Всі права захищені © Національна бібліотека України імені В. І. Вернадського