scholarly journals PREDICTION OF STABILITY OF THE CIRCULATING WATER

2020 ◽  
pp. 61-68
Author(s):  
Olena Pavlivna Galkina
Keyword(s):  
Calcium Ion ◽  
Coke Plant ◽  
Ion Content ◽  
Corrosion Properties ◽  
Circulating Water ◽  
Water Composition ◽  
Coke Plants ◽  
Stability Of Water ◽  
Total Salinity ◽  
Thermal Stability Of

In the work, on the basis of the data of the analysis of theoretical works and the laboratory studies carried out, the prediction of the values of corrosion rates in the circulating systems of coke plants was carried out using the Langelier and Ryznar stability indixes. The laws governing changes in the thermal stability of water as a function of temperature and water quality indicators (pH, alkalinity, total salinity, calcium ion content) have been established. Analysis of the obtained data showed that there is a clear dependence of the scale-corrosion properties of water on temperature and its chemical composition. A stable and effective supplying water composition for the circulating water supply system of the Kharkiv Coke Plant has been established.

scholarly journals Features of the subsurface water composition formation in the Mesozoic hydrogeological basin of the Middle Ob region fields

2021 ◽  
Vol 937 (3) ◽  
pp. 032016
Author(s):  
I G Sabanina ◽  
T V Semenova
Keyword(s):  
Calcium Ion ◽  
Oil And Gas ◽  
Upper Jurassic ◽  
Subsurface Water ◽  
Ion Content ◽  
The West ◽  
Water Composition ◽  
Composition Formation ◽  
Hydrogeological Conditions ◽  
Gas Bearing

Abstract The formation of the deep oil and gas bearing horizons hydrogeological conditions in the Middle Ob region and the West Siberian megabasin as a whole contains many questions and is a subject of discussion. This is due to numerous hydrogeodynamic and hydrogeochemical anomalies that do not have an unambiguous explanation. The hydrogeological conditions feature of the area under consideration is inversion hydrogeochemical zonation in the Lower Cretaceous and Upper Jurassic sediments, as well as the presence of low-mineralized formation waters of hydrocarbonate-sodium composition. The change in the genetic type of waters, the mineralization decrease, the calcium ion content decrease and an increase in the hydrocarbonate ion amount in the Mesozoic hydrogeological basin, is associated with the transformation of mineral and organic matter in sedimentary rocks during their immersion, occurring at the elision stage of the basin development.

scholarly journals Thermal Stability of Water Ice in Ceres' Craters: The Case of Juling Crater

2018 ◽  
Vol 123 (9) ◽  
pp. 2445-2463 ◽  
Author(s):  
M. Formisano ◽  
C. Federico ◽  
M. C. De Sanctis ◽  
A. Frigeri ◽  
G. Magni ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Water Ice ◽  
Stability Of Water ◽  
Thermal Stability Of

scholarly journals Influence of Carbon Nanotubes on Thermal Stability of Water-Dispersible Nanofibrillar Polyaniline/Nanotube Composite

Materials ◽  
2012 ◽  
Vol 5 (12) ◽  
pp. 327-335 ◽  
Author(s):  
Ana López Cabezas ◽  
Xianjie Liu ◽  
Qiang Chen ◽  
Shi-Li Zhang ◽  
Li-Rong Zheng ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Water Dispersible ◽  
Stability Of Water ◽  
Thermal Stability Of

Fundamental study on thermal stability of water hydrostatic spindle

2016 ◽  
Vol 2016 (0) ◽  
pp. S1320103
Author(s):  
Tsubasa YAGUCHI ◽  
Satoshi SHIBATA ◽  
Akio HAYASHI ◽  
Yohichi NAKAO
Keyword(s):  
Thermal Stability ◽  
Fundamental Study ◽  
Stability Of Water ◽  
Thermal Stability Of

Study on Magnetic and Corrosion Properties of Ce16Fe95-xCoxB8 (x=0-4) Alloys

2018 ◽  
Vol 914 ◽  
pp. 73-79
Author(s):  
Chang Cheng Fang ◽  
Qing Rong Yao ◽  
Yong Qiang Xu ◽  
Huai Ying Zhou ◽  
Guang Hui Rao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Phase Composition ◽  
Melt Spinning ◽  
Corrosion Potential ◽  
Corrosion Properties ◽  
Bare Substrate ◽  
Cobalt Addition ◽  
Thermal Stability Of ◽  
Co Doped

To understand the phase composition and improve the magnetic performances of Ce2Fe14B-type alloys, the ribbons of Ce16Fe95-xCoxB8(x=0-4.0) were prepared by melt-spinning at a quench wheel velocity of 40 m/s. The phase composition and magnetic properties of Ce16Fe95-xCoxB8(x=0-4.0) alloys were investigated. XRD results indicated that the main phase existed in the as-spun ribbons is Ce2Fe14B. The amorphous formation ability and thermal stability of as-spun ribbons were enhanced by trace cobalt addition. Co-doped samples had higher Curie temperature compared with bare Ce2Fe14B, which signified that Co atoms could substitute for Fe directly into Ce2Fe14B phase. The corrosion potential of alloys from-1089mV (vs. SCE) to-1077mV (vs. SCE) which indicated that the Co-doped provided better corrosion protection properties for the Ce-Fe-B magnet compared with bare substrate.

scholarly journals Experimental Study on MICP Technology for Strengthening Tail Sand under a Seepage Field

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Zhi-jun Zhang ◽  
Biao Li ◽  
Lin Hu ◽  
Huai-miao Zheng ◽  
Gui-cheng He ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Calcium Ion ◽  
Soil Stabilization ◽  
Comparative Experiment ◽  
Penetration Test ◽  
Calcium Carbonate Precipitation ◽  
Ion Content ◽  
Seepage Field ◽  
Main Factor

Microbial-induced calcium carbonate precipitation (MICP) technology is a new green reinforcing technology in soil stabilization. Targeting on the problem that seepage is the main factor of causing the instability of a tailings dam, a comparative experiment is conducted, which includes the MICP technology on reinforcing tailings with or without the effect of a seepage field. The results of the comparative experiment are as follow: the mercury penetration test indicates that, under the function of a seepage field, the total pore in the tailing is relatively decreased; SEM shows that under the function of a seepage field, the intergranular pore increases; the direct shear test shows that under the function of a seepage field, the tailings’ shear strength decreases; the determination of calcium ion content shows that the distribution of calcium carbonate in the tailings under the action of a seepage field is more uneven.

Preparation and Properties of Hydrogel Matrices based on Pectins from Callus Cultures

2020 ◽  
Vol 36 (3) ◽  
pp. 63-72
Author(s):  
O.V. Popeyko ◽  
E.I. Istomina
Keyword(s):  
Calcium Ion ◽  
Lemna Minor ◽  
Calcium Content ◽  
Callus Cultures ◽  
Gel Strength ◽  
Silene Vulgaris ◽  
Ion Content ◽  
Tanacetum Vulgare ◽  
Degradation Degree ◽  
Pectin Gels

Hydrogel matrices have been obtained from pectins of Silene vulgaris (SVC), Tanacetum vulgare (TVC) and Lemna minor (LMC) callus cultures, and from apple pectin (AU701). They differed in gel strength, calcium ion content and surface morphology. During the incubation under simulated gastric conditions (pH 1.25), the gel strength and calcium content decreased. The degradation degree of hydrogels grew in the range TVC < SVC < LMC < AU701. The degradation degree of hydrogels from the SVC, LMC, and TVC pectins gradually increased over 4 hours, while hydrogels from the AU701 pectin were destroyed within 2 hours. The gels prepared from pectins with low methyl esterification, low branching and high linearity underwent less degradation. The TVC pectin gels had the highest strength and were most stable at pH 1.25. The data obtained can be used to produce hydrogel matrices with desired physicochemical and functional properties. callus culture, pectin polysaccharides, hydrogels, gastric medium

scholarly journals Evaluation of thermal stability of water-driven spindle

2017 ◽  
Vol 83 (856) ◽  
pp. 17-00268-17-00268 ◽  
Author(s):  
Akio HAYASHI ◽  
Yohichi NAKAO
Keyword(s):  
Thermal Stability ◽  
Stability Of Water ◽  
Thermal Stability Of

Unprecedented thermal stability of water supersolid skin

2016 ◽  
Vol 220 ◽  
pp. 865-869 ◽  
Author(s):  
Yong Zhou ◽  
Yuan Zhong ◽  
Yinyan Gong ◽  
Xi Zhang ◽  
Zengsheng Ma ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Stability Of Water ◽  
Thermal Stability Of
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