Poly(octadecyl acrylate-co-vinyl neodecanoate)/Oleic Acid-Modified Nano-graphene Oxide as a Pour Point Depressant and an Enhancer of Waxy Oil Transportation

2021 ◽  
Author(s):  
Tahany Mahmoud ◽  
M. A. Betiha
Keyword(s):  
Graphene Oxide ◽  
Oleic Acid ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Waxy Oil ◽  
Oil Transportation ◽  
Point Depressant ◽  
Nano Graphene

scholarly journals Effect of a rapeseed oil derived pour point depressant on the flow properties of the waxy oil from Changqing Oilfield

2021 ◽  
Vol 329 ◽  
pp. 01051
Author(s):  
Yongzhen Wang ◽  
Guibin Liu ◽  
Xiaoyu Zhou ◽  
Qingzhu Zhng ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Pour Point ◽  
Rapeseed Oil ◽  
Reduction Rate ◽  
Viscosity Reduction ◽  
Flow Properties ◽  
Pour Point Depressant ◽  
Scanning Calorimetry ◽  
Waxy Oil ◽  
Point Depressant ◽  
Wax Crystals

In this paper, rapeseed oil was modified with diethylenetriamine to obtain a vegetable oil-derived pour point depressant (PPD), which was used to reduce the pour point and improve the flowability of the crude oil (from Changqing Oilfield), which has a high content of paraffin. Various instruments such as differential scanning calorimetry (DSC), polarized optical microscopy (POM), and a viscometer were used to investigate the performance of the PPD. The results showed that with the introduction of PPD into the waxy oil sample, the pour point of which could be significantly lowered from 20.0 °C to 13.2 °C. At 23 °C, the viscosity reduction rate of the oil sample was 68% in the presence of 500 mg/kg PPD. The wax morphology observation also confirmed that the formation and growth of the wax crystals could be significantly delayed and restrained. The results supported that the PPD synthesized in this paper could effectively improve the flowability of the waxy oil from Changqing Oilfield.

scholarly journals Comparison of pour point depressant (PPD) ethylene-vinyl acetate (EVA) and nano-montmorillonite

2021 ◽  
Vol 894 (1) ◽  
pp. 012019
Author(s):  
Z D Nurfajrin ◽  
B Satiyawira ◽  
R A Putra
Keyword(s):  
Crude Oil ◽  
Vinyl Acetate ◽  
Pour Point ◽  
Ethylene Vinyl Acetate ◽  
Oil Viscosity ◽  
Pour Point Depressant ◽  
Oil Transportation ◽  
Point Depressant ◽  
Wax Deposits ◽  
Wax Crystals

Abstract One of the problems with oil production is stuck of oil transportation flow in the pipeline caused by wax deposits. The high wax content in crude oil causes the oil viscosity value to increase so that crude oil has High Pour Point Oil (HPPO) properties. In this research, using crude oil sample with initial pour point of 31oC and viscosity of 556 cP. This samples are classified as heavy oil. Therefore, this sample is suitable for use as an experiment in this research. There are several methods to deal with HPPO. One chemical method used to overcome this problem is adding Pour Point Depressant (PPD) to crude oil. This PPD functions to decrease pour point value by binding wax crystals in crude oil. In this study, two types of PPD were compared, Ethylene-Vinyl Acetate (EVA) and Nano-Montmorillonite (Nano-MMT). Both can reduce the pour point value on crude oil, but PPD EVA shows a more excellent reduction than nano-MMT. The results show that EVA is better at binding crystals than nano-MMT. After the injection of 400 ppm EVA, the pour point value of crude oil could be decreased up to 24oC, and the viscosity also decreased by 185 cP.

scholarly journals Effect of nano pour point depressant on the flow properties of the waxy crude oil from Changqing Oilfield

2021 ◽  
Vol 329 ◽  
pp. 01050
Author(s):  
Huatao Wen ◽  
Songzhao Zhang ◽  
Yubo Lian ◽  
Zhiguang Zhao ◽  
Weibo Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Crude Oil ◽  
Pour Point ◽  
Reduction Rate ◽  
Viscosity Reduction ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Scanning Calorimetry ◽  
Waxy Crude ◽  
Point Depressant

In this paper, graphene oxide (GO) was modified with alkyl amidopropyl diethanolamine to obtain a nano pour point depressant (GO-PPD), which was used to improve the flowability of the waxy oil extracted from Changqing Oilfield, China. Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), polarized optical microscopy (POM) and viscometer were employed to evaluate the performance of the GOPPD. The results showed that compared with traditional pour point depressant (PPD), the GO-PPD exhibited higher performance in promoting the flowability of waxy crude oil. With the presence of 500 mg/kg GO-PPD in the waxy crude oil, the pour point of which could be reduced by 5.5 °C. Also, with the presence of 500 mg/kg GO-PPD, the viscosity reduction rate of the waxy crude oil can reach up to 52% at 30 °C. Through the observation via polarized microscopy, we have also found that with the introduction of GO-PPD in the crude oil, the formation of the wax crystals can be greatly retarded. This confirmed that the graphene oxide derivates could also be served as PPD, which facilitates the flowability of certain crude oil (e.g., waxy crude oil from Changqing Oilfield).

The influence of nanocomposite pour point depressant on the crystallization of waxy oil

Fuel ◽  
2018 ◽  
Vol 221 ◽  
pp. 257-268 ◽  
Author(s):  
Huirong Huang ◽  
Wei Wang ◽  
Zeheng Peng ◽  
Yanfen Ding ◽  
Kai Li ◽  
...  
Keyword(s):  
Pour Point ◽  
Pour Point Depressant ◽  
Waxy Oil ◽  
Point Depressant

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.

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