Measurement of bulk electrical conductivity of hydrocarbon liquids

Белоусов, А. И.; Rozhkov, I. V.; Bushueva, E. M.

doi:10.1007/bf00725997

Cited by 3 publications

(5 citation statements)

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“…Hydrocarbons are excellent insulators (Belousov et al, 2004). Biodegradation of the hydrocarbons, because of microbial activity, can lead to a significant increase in bulk conductivity (Atekwana et al, 2002(Atekwana et al, , 2004.…”

Section: Spectroscopy and Geophysical Measurementsmentioning

confidence: 99%

A spectral-geophysical approach for detecting pipeline leakage

Meijde¹,

Werff²,

Jansma³

et al. 2009

International Journal of Applied Earth Observation and Geoinfor

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Section: Spectroscopy and Geophysical Measurementsmentioning

confidence: 99%

A spectral-geophysical approach for detecting pipeline leakage

Meijde¹,

Werff²,

Jansma³

et al. 2009

International Journal of Applied Earth Observation and Geoinfor

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“…The information available on the electrical properties of tar addresses mostly on the bulk and relative conductivity of individual and collective compounds in dry and liquid state. [30][31][32][33][34][35][36] The tar compounds with 'methyl, hydroxy or vinyl' group such as 'toluene, phenol, styrene or 1-methylnaphthalene' manifest dipole moments ranging from 0.13 D to 2.2 D. 30 At the same time, the 'pure' aromatic hydrocarbons without functional groups present in tar such as 'benzene', 'naphthalene', 'anthracene', 'phenanthrene', 'pyrene' and so forth, are individually unipolar and non-conductive. 30,32,36 It is proven that aromatic hydrocarbon compounds must be considered as non-conductive in their pure form and that the presence of any impurity leads into an increase of their conductivity in consequence of the raising amount of free charge carriers like electrons and/or ions.…”

Section: Dielectric Nature Of Tarmentioning

confidence: 99%

“…In this context, there are only a few literatures that reports the electrical properties of tar. [30][31][32][33][34][35][36] Recently, there is an increasing interest in understanding the typical behavior of tar under AC voltage over a wide frequency. 2,3,[10][11][12]17,18 During this, the dielectric behavior of multiple tar species under dry and wet conditions are studied over a wide frequency.…”

Section: Introductionmentioning

confidence: 99%

Quasi‐phase resolved partial discharge pattern analysis of surface discharges arising on the tar polluted porcelain bushing of an electrostatic precipitator unit under high voltage DC

Schröder¹,

Neubauer²,

Schoenemann

et al. 2021

Engineering Reports

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This paper investigates on understanding the DC electrical discharges arising on the surface of feed-through type indoor bushing with tar depositions. Such information not only provides diagnostic status but also characterizes the multitude of species forming tar depositions which is currently unavailable in literatures. The current practice on analyzing surface discharges initiated under DC voltage employs primitive methods that accounts for the individual discharge events over a larger span rendering it less sensitive and time consuming.The usual practice is to count the discharge events initiated under DC voltage as PD pulses and count the events, repetition rates, time of occurrence, and so forth, to estimate the severity of the fault condition. On contrary, synchronizing these discharge pulses to the phase of the AC voltage, input to the rectifier unit, manifests a pattern, which is time independent and is sensitive in revealing diagnostic status of the bushing. These objectives are initially verified on a sample extracted from a tar polluted bushing. A half-wave bridge rectifier that produces an uncontrolled positive and negative DC voltage is selected to initiate surface discharges. Pertinent pulses are then correlated to the phase of the AC voltage input to the rectifier and a quasi-phase resolved partial discharge pattern (QPRPD) is developed. Using this QPRPD pattern, the significance of positive and negative DC voltages applied on the surface of the polluted sample is studied and the inception of discharges events and their correlation to the defect conditions are evaluated. Following this, the pertinent findings are validated on an ‡ Dipl.-Ing. (FH) Philipp Schröder and Dr. Ing. York Neubauer worked at the Institute of Energy Engineering at TU Berlin on the topic presented in this paper within the "EMF project". Both continued their work on high voltage applications in gas cleaning and gas conditioning in the junior research group NWG-TCKON at the same institute.

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“…Through a more deep deliberation of the chemical structure of these materials, it may be understood that resonance existence plays the main role in smoothing the progress of charge transfer. These ASAs do not have the same efficiency in different media, and some things, such as the viscosity of the liquid and boundary layer effects, can change the functionality considerably 19…”

Section: Introductionmentioning

confidence: 99%

“…ASAs do not have the same efficiency in different media, and some things, such as the viscosity of the liquid and boundary layer effects, can change the functionality considerably. 19 Ziegler-Natta type catalysts are sensitive to compounds that have oxygen and nitrogen in their molecular configuration. 20,21 It is well known that external donor strongly affects the polymerization.…”

Section: Introductionmentioning

confidence: 99%

Antielectrostatic agent addition in low‐dielectric‐constant polymerization media

Bayat

Abdouss

2012

J of Applied Polymer Sci

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In the coordinative polymerization of α‐olefin by a slurry process, a low‐dielectric‐constant suspending agent, such as hexane or heptane, must be used. As a result of solvent movement and its friction between system components, electrostatic charges are generated. Because of low electrical conduction of these solvents, the generated charges accumulate in the polymerization medium. Consequently, a repulsive force between same charges effects the growth of the polymer particles and causes them to form fine particles. In this article, we present research results on the effects of antielectrostatic agents on the increase of the electrical conduction of the polymerization medium, particle size distribution, and also the quantity of fine particles in the final polymer. Techniques gained from the fuel industry were applied to modify the subjected polymerization medium. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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Measurement of bulk electrical conductivity of hydrocarbon liquids

Cited by 3 publications

References 0 publications

A spectral-geophysical approach for detecting pipeline leakage

A spectral-geophysical approach for detecting pipeline leakage

Quasi‐phase resolved partial discharge pattern analysis of surface discharges arising on the tar polluted porcelain bushing of an electrostatic precipitator unit under high voltage DC

Antielectrostatic agent addition in low‐dielectric‐constant polymerization media

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