Research into the Effects of Pour-Point Depressant on Different Wax-Contents Crude Oils

2011 ◽  
Vol 236-238 ◽  
pp. 804-807 ◽  
Author(s):  
Xiao Fei Zhao ◽  
Su Min Liu ◽  
Qing Long She ◽  
Hai Fei Wen ◽  
Jing Ma ◽  
...  
Keyword(s):  
Crystal Size ◽  
Crystal Morphology ◽  
Oil Fields ◽  
Crude Oils ◽  
Pour Point Depressant ◽  
Crystallization Peak ◽  
Point Depressant ◽  
Wax Crystal ◽  
Abnormal Points ◽  
Wax Crystallization

The oils studied in this work were three typical oils, sampled from Daqing, Jilin, Liaohe Oil Fields and marked with 1#, 2#, 3# respectively, with wax contents 20.06%, 26.2%, 32.9% separately. The effects of PPD on WATs, abnormal points, pour points, rheological properties and wax-crystal morphology were studied in detail in this paper. The results of experiments indicated that PPD lowers WATs and abnormal points, and decreases the viscosities of crude oils when they are non-Newtonian fluids. In wax-crystallization peak area, both high shear rate and increase of cooling rate make the effects of PPD decrease and the viscosity of oil increase. When 1# sample is reheated to some temperature below 50°C (for 2#, below 70°C), the effects of PPD reduce. With the increase of PPD’s dosage, the crystal size gets smaller and the dispersibility becomes better.

LOW TEMPERATURE FLOW CHARACTERISTICS OF SOME WAXY CRUDE OILS IN RELATION TO THEIR COMPOSITION : PART I WITH AND WITHOUT POUR POINT DEPRESSANT ADDITIVES

1997 ◽  
Vol 15 (5-6) ◽  
pp. 495-502 ◽  
Author(s):  
D. Sree Lakshmi ◽  
M. Rama Krishna ◽  
M. Vanketasrrwar Rao ◽  
M. Bhagvanth Rao ◽  
R.C. Purohit ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pour Point ◽  
Flow Characteristics ◽  
Crude Oils ◽  
Pour Point Depressant ◽  
Waxy Crude ◽  
Point Depressant ◽  
Waxy Crude Oils

Optimizing Hydrogen Storage in MOFs through Engineering of Crystal Morphology and Control of Crystal Size

2021 ◽  
Author(s):  
Kuthuru Suresh ◽  
Darpandeep Aulakh ◽  
Justin Purewal ◽  
Donald J. Siegel ◽  
Mike Veenstra ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Crystal Size ◽  
Crystal Morphology ◽  
And Control

Application of Synthesized Novel Biodegradable Pour-Point Depressant from Natural Source on Flow Assurance of Indian Waxy Crude Oil and Comparative Studies with Commercial Pour-Point Depressant

SPE Journal ◽  
2021 ◽  
pp. 1-13
Author(s):  
Biswadeep Pal ◽  
Tarun Kumar Naiya
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Pour Point ◽  
Microscopic Analysis ◽  
Proton Nuclear Magnetic Resonance ◽  
Flow Assurance ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Point Depressant

Summary Pour-point depressants (PPDs) were synthesized from natural sources and used in waxy crude oil transportation to reduce the pour point and improve flow. A biodegradable PPD (BPPD) was synthesized and tested to mitigate crude oil flow assurance problems in the present work. The transesterification process was used to synthesize coconut oil ethyl ester (COEE, termed as BPPD). Fourier transform electron spectroscopy (FTIR), proton nuclear magnetic resonance (H-NMR), and microscopic analysis were performed for better understanding of mechanisms for both BPPD and a commercially available PPD named PPD-A. The pour point of crude oil was reduced by 12 and 9°C after the addition of 800 ppm BPPD and PPD-A, respectively. The microscopic analysis confirms that the crystals of wax converted to very fine and dispersed particles during mixing of additives, which in turn increase flowability. BPPD performs better to reduce interfacial tension than PPD-A. The maximum reduction of 19% in interfacial tension was observed after the addition of 800 ppm BPPD. BPPD alters the wettability of the pipeline surface from intermediate wet to water-wet within 60 seconds, which results in reduced slip velocity and consequently lessens the deposition of wax. As a result, crude oils will not stick to the wall of the pipe surface and will experience less resistance to flow through pipelines. FTIR analysis indicated that long-chain alkane and aromatic groups are responsible for a higher pour point, and their concentration level was reduced after the addition of BPPD. The viscosity of crude oil was reduced by almost 94% after the addition of 800 ppm BPPD with crude oil, which in turn minimizes pumping costs for crude oil. As a result, the total project cost was reduced substantially. Biodegradability tests confirm that the BPPD is biodegradable and nontoxic. Due to its biodegradability and nontoxic nature, BPPD has a promising capacity to be used in the petroleum industry for easier pipeline transportation of waxy crude.

Influence of poly (methacrylate-co-maleic anhydride) pour point depressant with various pendants on low-temperature flowability of diesel fuel

Fuel ◽  
2018 ◽  
Vol 216 ◽  
pp. 898-907 ◽  
Author(s):  
Guangwen Xu ◽  
Yuan Xue ◽  
Zhicheng Zhao ◽  
Xiang Lian ◽  
Hualin Lin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Maleic Anhydride ◽  
Diesel Fuel ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Point Depressant

Synthesis and Evaluation of Grafted EVAL as Pour Point Depressant for Waxy Crude Oil

2018 ◽  
Vol 57 (25) ◽  
pp. 8612-8619 ◽  
Author(s):  
Yongwen Ren ◽  
Long Fang ◽  
Zhaojun Chen ◽  
Hui Du ◽  
Xiaodong Zhang
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Point Depressant
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