Partial Upgrading of Bitumen: Impact of Solvent Deasphalting and Visbreaking Sequence

被引：42

作者：

Zachariah, Ashley ^{[1
,2
]}

de Klerk, Arno ^{[1
]}

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada

[2] Praxair Canada Inc, 9020 24 St NW, Edmonton, AB T6P 1X8, Canada

来源：

ENERGY & FUELS | 2017年 / 31卷 / 09期

关键词：

ATHABASCA BITUMEN; THERMAL-CRACKING; VISCOSITY; DENSITY; TEMPERATURES; MODEL;

D O I：

10.1021/acs.energyfuels.7b02004

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Solvent deasphalting and visbreaking are two important technologies in the development of processes for partial upgrading of oilsands-derived bitumen to improve oil fluidity for pipeline transport. This work investigated the impact of the process sequence, solvent deasphalting followed by visbreaking (SDA-Vis) compared to visbreaking followed by solvent deasphalting (Vis-SDA). Thermal conversion during visbreaking was performed at 380 degrees C for 85 min, and solvent deasphalting was performed with n-pentane. Using this combination of processes in either sequence changed bitumen from a viscosity-limited fluid to a density-limited fluid with respect to pipeline specifications. The density and viscosity of the oil products from SDA-Vis and Vis-SDA were comparable. It was found that SDA-Vis achieved 2 wt % higher liquid yield than Vis-SDA. Conversely, Vis-SDA produced an oil product with higher hydrogen to carbon ratio compared to SDA-Vis. This difference could be explained in terms of hydrogen transfer during thermal conversion. Overall, the diluent requirements to meet pipeline fluidity requirements could be reduced by 40% relative to the Cold Lake bitumen feed.

引用

页码：9374 / 9380

页数：7