爱沙尼亚学术期刊
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作者:LEI WANG , DONG YANG , JING ZHAO ...
来源:[J].Oil Shale(IF 0.636), 2018, Vol.35 (3), pp.230-241Estonian Academy Publishers
摘要:Internal pores and fractures inside oil shale undergo complex changes during pyrolysis in superheated steam. After a simulated in-situ pyro­lysis in superheated steam, the pore characteristics of 30 oil shale samples from different zones between the injection and production ...
作者:LIJUN LIU , GAN CHENG , WEI YU ...
来源:[J].Oil Shale(IF 0.636), 2018, Vol.35 (3), pp.242-253Estonian Academy Publishers
摘要:As the world’s second largest solid fossil fuel deposit after coal, utilization of oil shale has become a research hotspot lately. The application of oil shale may be limited because of its high ash content. In this paper, froth flotation technology was used to treat oil sha...
作者:TIANHUA YANG , BING ZHOU , RUNDONG LI ...
来源:[J].Oil Shale(IF 0.636), 2018, Vol.35 (3), pp.279-289Estonian Academy Publishers
摘要:Oil shale was liquefied in supercritical ethanol in an autoclave. The effects of reaction temperature and residence time on the liquefaction of oil shale were studied. The optimum conditions for liquefaction were 360 °C and 210 min, which gave a shale oil yield of 18.15 wt%....
作者:RIVO RANNAVESKI , MADIS LISTAK , VAHUR OJA
来源:[J].Oil Shale(IF 0.636), 2018, Vol.35 (3), pp.254-264Estonian Academy Publishers
摘要:The average boiling points (ABPs) of narrow boiling range oil distillation cuts are important in predicting thermodynamic and physical properties of oils. Due to convenience, simple batch distillation methods, either at atmospheric or reduced pressure, are often used to sepa...
作者:JANEK REINIK , EILIV STEINNES , NATALYA IRHA ...
来源:[J].Oil Shale(IF 0.636), 2018, Vol.35 (3), pp.265-278Estonian Academy Publishers
摘要:Oil shale ash (OSA) from the circulating fluidized bed (CFB) boiler was granulated and used as a sorbent for the removal of phenols from shale oil wastewater. The method for preparation of the sorbent involved washing of the ash, mixing with clay, gelling the mixture with so...
作者:Mallikarjun Soudari , Vadim Kaparin , Seshadhri Srinivasan ...
来源:[J].Proceedings of the Estonian Academy of Sciences(IF 0.312), 2018, Vol.67 (3), pp.291-299Estonian Academy Publishers
摘要:The paper suggests a simple energy saving controller for heating, ventilation, and air-conditioning (HVAC) systems that combines information on occupancy and weather with predictive control to save energy in buildings. The controller uses a pulse width modulation strategy and tur...
作者:Peeter Oja , Gul Wali Shah
来源:[J].Proceedings of the Estonian Academy of Sciences(IF 0.312), 2018, Vol.67 (3), pp.246-251Estonian Academy Publishers
摘要:Periodic polynomial spline histopolation with arbitrary placement of histogram knots is studied. Spline knots are considered coinciding with histogram knots. The main problem is the existence and uniqueness of the histopolant for any degree of spline and for any number of partiti...
作者:Mart Abel
来源:[J].Proceedings of the Estonian Academy of Sciences(IF 0.312), 2018, Vol.67 (3), pp.282-290Estonian Academy Publishers
摘要:The conditions when C0(X)⊗Y is dense in C0(X;Y) in the compact-open topology on C0(X;Y) are given. This result is used for describing the properties of topological Segal algebras.
作者:Laur Tooming
来源:[J].Proceedings of the Estonian Academy of Sciences(IF 0.312), 2018, Vol.67 (3), pp.252-259Estonian Academy Publishers
摘要:We consider Morita contexts for semirings that have certain local units but not necessarily an identity element. We show that the existence of a Morita context with unitary bisemimodules and surjective maps implies that the two semirings involved have isomorphic quantales of idea...
作者:Toomas Tenno , Ergo Rikmann , Ivar Zekker ...
来源:[J].Proceedings of the Estonian Academy of Sciences(IF 0.312), 2018, Vol.67 (3), pp.300-302Estonian Academy Publishers
摘要:The aim of the current study was to investigate and model particle size dependence of the dissolution process of Ca(OH)2, CaCO3, and oil shale ash. In the samples of the self-regulating equilibrium system H2O–dissolved CO2–solid CaCO3 filtered through a 0.45 μm filter n...

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