Application of Nano-Material Based Hybrid Pour-Point Depressant for Long-Distance Waxy Crude Pipeline

2012 ◽  
Author(s):  
Dongmin Zhang ◽  
Lixin Zhang ◽  
Lianfeng Huo ◽  
Shujie Zhi ◽  
Xin Ouyang ◽  
...  
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Treatment Temperature ◽  
Pour Point Depressant ◽  
Long Distance ◽  
Waxy Crude ◽  
Point Depressant ◽  
Nano Material ◽  
New Type ◽  
Wax Appearance Temperature

A new type of nano-material based hybrid pour-point depressant with significant efficiency has been developed and successfully used in industrial application. For Daqing crude oil, a typical high waxy Chinese crude, with 80–100g/t new pour-point depressant and 58–65°C thermal treatment temperature, the wax appearance temperature of the Daqing crude oil can be decreased by 3–4°C. The viscosity/pour-point reduction, shearing resistance, and fluidity at low temperature of the modified crude with new type of pour-point depressant is much better than the effect of using traditional ethylene-vinyl acetate (hereinafter referred as “EVA”). Therefore the safe shutdown time for a pipeline is dramatically increased which not only enhances the safety of the pipeline operation but also significantly saves the energy consumption of the pipeline company. Besides, the reheating temperature can only be greatly reduced to 35°C. The relationship between the crystal structure of the nano-material based pour-point depressant and the type of the waxy crude, together with its influence on the crystal form/wax appearance temperature of the waxy crude by using X ray diffraction (hereinafter referred as “XRD”) and Polarizing microscope (hereinafter referred as “POM”)are studied.

Pour Point Depressant(PPD) and Flow Improver Additives (FIA) of Crude Oil and its Study Method Progress

2012 ◽  
Vol 524-527 ◽  
pp. 1844-1847 ◽  
Author(s):  
Hong Zhang ◽  
Wen Fa Xiao
Keyword(s):  
Low Temperature ◽  
Crude Oil ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Long Distance ◽  
Great Resistance ◽  
Waxy Crude ◽  
Point Depressant ◽  
Flow Improver

The situation of low temperature crude oil pipeline carrying is universal. The rapid developing of pipe line supposes higher asking on new carrying technology. The problem of long distance carrying at normal temperature of high waxy crude oil is impel to resolve and its potential social economic profit is obvious. As the pipeline is designed at high production period of field so there must have low carrying situation at beginning and ending time. At the situation the high waxy crude oil and high pour point crude oil will face on great resistance and blockage problem. Further more the pipeline has to make great energy expense on high temperature carrying. So take new carrying technology to realize atmosphere temperature carrying is crucial of resolving low temperature carrying. The method of adding chemical pour point depressant(PPD)/flow improver additives (FIA) into crude oil directly was widely used at present. The progress of the additives and its study methods was summarized in the paper and supply some reference for the technology of PPD/FIA.

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.

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

Advances in the research of polymeric pour point depressant for waxy crude oil

2017 ◽  
Vol 39 (8) ◽  
pp. 1165-1171 ◽  
Author(s):  
Na Li ◽  
GuoLiang Mao ◽  
XianZhi Shi ◽  
ShiWei Tian ◽  
Yang Liu
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Point Depressant

scholarly journals THE EFFECT OF SILICA BASED NANOCOMPOSITE POUR POINT DEPRESSANT ON THE WAXY CRUDE OIL OF NORTH-EAST INDIA

2021 ◽  
Vol 5 (9) ◽  
Author(s):  
Rituraj Singh ◽  
Prasenjit Talukdar
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Flow Properties ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
North East India ◽  
North East ◽  
Point Depressant ◽  
Pour Point Depressants

In the aura of this research we developed the grafted nanocomposite pour point depressant by culmination of a set of monomers namely acrylamide, maleic anhydride, styrene, and octadecyl methacrylate and further grafted to nano silica for improving the flow properties and thereby decrease the temperature of pour point value of the NorthEast Indian waxy based crude oil. Moreover, to emphasize and understand the central effects of different concentrations of synthesized nanocomposite pour point depressants on the pour point of waxy crude oil, several important experiments were undergone and later its results were compared with the commercial pour point depressant. In addition, the rheological props of the sample crude were also analyzed with and without additives. The results shows that the synthesized nanocomposite has more effectively reduced the viscosity as well as pour point of the sample to desired value when compared to that of the commercially used pour point depressant.

Review on the gelation of wax and pour point depressant in crude oil multiphase system

2021 ◽  
Vol 35 (12) ◽  
pp. 2130005
Author(s):  
Hongmei Xu ◽  
Yanpu Wang ◽  
Kun Wang
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Molecular Design ◽  
Research Progress ◽  
Multiphase System ◽  
Wax Deposition ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Point Depressant

The gelation of waxy crude oil multiphase system can result in the formation of network cementitious structure, which seriously impacts the safe and economic production of crude oil. This paper reviews current experimental, theoretical and numerical results on the gelation of wax in crude oil. For the experimental side, the most important problems are in situ measurement and measurement accuracy. On the theoretical side, the present methods own defects of low accuracy and limited application scope. Numerically, the models are of oversimplification, which are hardly applied to the real production. Besides, as a promising solution, the research progress of crude oil pour point depressant is also reviewed. The molecular design is a powerful approach to develop the optimized pour point depressant. The goals of this paper are to bridge the microscale atomic interactions and the macroscale physicochemical properties of waxy crude oil and pour point depressant, so as to lay a solid theoretical basis for preventing and controlling wax deposition in crude oil. These are beneficial to the future efficient, clean and safe energy production system.

Influence of the nano-hybrid pour point depressant on flow properties of waxy crude oil

Fuel ◽  
2016 ◽  
Vol 167 ◽  
pp. 40-48 ◽  
Author(s):  
Cunzhe He ◽  
Yanfen Ding ◽  
Juan Chen ◽  
Feng Wang ◽  
Chong Gao ◽  
...  
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Flow Properties ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Point Depressant
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