A Comparative Evaluation of Selected Correlations for Estimating Wax-Appearance Temperature of Crude Oils

2020 ◽  
Author(s):  
Stella I. Eyitayo ◽  
Kazeem A. Lawal ◽  
Kenneth O. Guobadia ◽  
Mathilda I. Ovuru ◽  
Oluchukwu M. Okoh ◽  
...  
Keyword(s):  
Comparative Evaluation ◽  
Crude Oils ◽  
Wax Appearance Temperature

Microfluidic technique for measuring wax appearance temperature of reservoir fluids

Lab on a Chip ◽  
2016 ◽  
Vol 16 (19) ◽  
pp. 3795-3803 ◽  
Author(s):  
Shahnawaz Molla ◽  
Laura Magro ◽  
Farshid Mostowfi
Keyword(s):  
Microfluidic Device ◽  
Crude Oils ◽  
Powerful Technique ◽  
Wax Appearance Temperature ◽  
Microfluidic Technique

We present a powerful technique for measuring wax appearance temperature (WAT) of crude oils using a simple microfluidic device.

Understanding wax appearance temperature in light crude oils by DSC, NMR, and HT-GC

2017 ◽  
Vol 35 (15) ◽  
pp. 1595-1600 ◽  
Author(s):  
Rashmi Bagai ◽  
Nitu Singh ◽  
Ravindra Kumar ◽  
Anju Chopra ◽  
P. K. Mahendra ◽  
...  
Keyword(s):  
Crude Oils ◽  
Wax Appearance Temperature

scholarly journals The Effect of CO2 on Wax Appearance Temperature of Crude Oils

2016 ◽  
Vol 148 ◽  
pp. 1022-1029 ◽  
Author(s):  
Arya Hosseinipour ◽  
Azuraien Bt Japper-Jaafar ◽  
Suzana Yusup
Keyword(s):  
Crude Oils ◽  
Wax Appearance Temperature

The Impact of the Composition of the Crude Oils on the Wax Crystallization

2014 ◽  
Vol 625 ◽  
pp. 196-200 ◽  
Author(s):  
Arya Hosseinipour ◽  
Khalik M. Sabil ◽  
Andhy Arya Ekaputra ◽  
Azuraien B. Japper ◽  
Lukman B. Ismail
Keyword(s):  
Differential Scanning Calorimetry ◽  
High Pressure ◽  
Crude Oil ◽  
Crude Oils ◽  
Solubility Curve ◽  
Scanning Calorimetry ◽  
Wax Precipitation ◽  
Wax Appearance Temperature ◽  
Wax Crystallization ◽  
The Impact

One of the major problems in petroleum industry is wax precipitation and deposition. The component’s compositional and structural analysis of the crude oils is key factors to be studied to mitigate wax formation and precipitation tendency for the betterment of the crude oil flowability. In this work, the compositions and structures of two Malaysian and Sudanese crude oil samples were determined to investigate their effects on wax precipitation. The GC/MS was used to analyze hydrocarbon components. For this work, high pressure micro differential scanning calorimetry (HPμDSC) is used to determine the wax crystallization point and solubility curve. Results showed a linear relationship between wax appearance temperature (WAT) and weight percentage of component in the crude oil having > 14 carbon atoms. In addition, the effect of temperature on the amount of wax precipitation has also been investigated. Keywords: N-paraffin, Wax appearance temperature, Wax precipitation, High pressure micro differential scanning calorimetry

Comparison of In-the-Ear and Over-the-Ear Hearing Aid Fittings

1986 ◽  
Vol 51 (4) ◽  
pp. 362-369 ◽  
Author(s):  
Donna M. Risberg ◽  
Robyn M. Cox
Keyword(s):  
Hearing Aids ◽  
High Frequency ◽  
Comparative Evaluation ◽  
Speech Intelligibility ◽  
Hearing Aid ◽  
Hearing Aid Fitting ◽  
The Difference ◽  
Functional Gain ◽  
The Relationship

A custom in-the-ear (ITE) hearing aid fitting was compared to two over-the-ear (OTE) hearing aid fittings for each of 9 subjects with mild to moderately severe hearing losses. Speech intelligibility via the three instruments was compared using the Speech Intelligibility Rating (SIR) test. The relationship between functional gain and coupler gain was compared for the ITE and the higher rated OTE instruments. The difference in input received at the microphone locations of the two types of hearing aids was measured for 10 different subjects and compared to the functional gain data. It was concluded that (a) for persons with mild to moderately severe hearing losses, appropriately adjusted custom ITE fittings typically yield speech intelligibility that is equal to the better OTE fitting identified in a comparative evaluation; and (b) gain prescriptions for ITE hearing aids should be adjusted to account for the high-frequency emphasis associated with in-the-concha microphone placement.

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