Factors influencing non-aqueous extraction process of bitumen to mitigate the environmental impacts

Yuan, Jing; Elektorowicz, Maria

doi:10.1016/j.psep.2021.07.016

Cited by 3 publications

(7 citation statements)

References 35 publications

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“…The product [17] and Pal et al [16] The cyclopentane data are from Pal et al [16] and Yuan and Elektorowicz. [11] The 30/70 heptol data are from Hooshiar et al [13] quality was higher for the 30/70 T/H mixture, likely because it had a lower density than the other mixtures (730 kg/m 3 vs. 803 kg/m 3 for 70/30 T/H and 779 kg/m 3 for cyclohexane), allowing for more effective settling.…”

Section: Comparison With Literaturementioning

confidence: 99%

“…Similarly, if the separation procedure is less effective at removing T A B L E 7 Ore composition and bitumen recovery for non-aqueous extractions (NAE) from the literature. [11,13,16,17] clays, the bitumen recovery and product quality trends will be affected. Figure 8 shows the impact of ore quality on the bitumen content of the product from multistage NAE processes with different solvents.…”

Section: Comparison With Literaturementioning

confidence: 99%

“…Bitumen recovery is less for single stage versus multistage non-aqueous bitumen extraction. [11,13] Practical NAE processes are likely to be countercurrent and closer in performance to the multistage extractions. Therefore, only multistage processes are considered here.…”

Section: Comparison With Literaturementioning

confidence: 99%

“…In general, multistage processes equivalent to a countercurrent process significantly out-perform single stage processes. [11,13] Li et al [14] evaluated the impact of temperature, solvent/ ore S/O ratio, stirring speed, and contact time on bitumen recovery in a single stage NAE process. They concluded that temperature and contact time had no significant effect, but that recovery increased with increasing S/O ratio and stirring speed.…”

Section: Introductionmentioning

confidence: 99%

“…[ 10 ] However, it has some significant disadvantages. [ 11 ] The process is water‐intensive, requiring three to four barrels of water per barrel of bitumen produced. The water must be heated, typically to 50–80°C, leading to high energy consumption and high greenhouse gas emissions.…”

Section: Introductionmentioning

confidence: 99%

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Effect of ore quality on non‐aqueous oil sand extraction performance

Tamayo,

Baydak,

Yarranton

2023

Can J Chem Eng

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Current commercial aqueous based extraction processes are energy and greenhouse gas (GHG) intensive and require large tailings ponds. Non‐aqueous extraction (NAE) of bitumen from mineable oil sands is an alternative that eliminates tailings ponds with potentially lower energy requirements and GHG emissions. The economics of the NAE process depend partly on the impact of ore quality on bitumen recovery and product quality (low water and solids content). It has been claimed that NAE performance is insensitive to the quality (bitumen content) of the oil sand ores. However, the available data are ambiguous because different extraction methods and solvents were used in different studies and, in many cases, a limited range of ore qualities was examined. In this study, bitumen was extracted from eight ores of different quality with cyclohexane using a multistage method equivalent to a countercurrent process with a solvent/ore ratio of 0.67 w/w. The bitumen recovery and the water and solids content of the product bitumen were determined for each ore. It was found that bitumen recovery correlated negatively to clay content of the ore. The loss of recovery was attributed to bitumen adsorption on clays. The product quality was insensitive to the ore quality and instead depended on the density of the fluid medium, as expected with a centrifuge‐based separation method. The recovery and product quality from the NAE method were similar to those from aqueous extractions.

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