Rapid Determination of Bitumen Content in Athabasca Oil Sands by Laser-Induced Breakdown Spectroscopy

Abstract

Evaluation of bitumen content in oil sands feedstock is important to control the extraction process and improve the recovery efficiency. Current standard techniques for bitumen determination in oil sands ore suffer whether from their timeconsuming labor intensive method of sample preparations or from requiring a high number of samples for calibration purposes. The analysis of bitumen ore samples is very challenging for the analytical chemist due to its nature of several phases of wet and dry particles and heterogeneous mixture of clay, bitumen, water, and solid contents. In this paper, we present a new enabling method using LIBS to determine rapidly and without sample preparation the bitumen content in oil sands ores. A qualitative study by principal component analysis was first done, and then a partial least-squares method was performed to assess the feasibility of determining bitumen by LIBS. The results show a good correlation between LIBS spectra and bitumen content and a prediction averaged absolute error around 0.7%. This method demonstrates that the LIBS is a promising tool for rapidly assessing oil sands ore grades either in the lab, at-line, or online. Elemental composition of solids is also investigated.

Indicator Minerals, Pathfinder Elements, and Portable Analytical Instruments in Mineral Exploration Studies

“…Such studies also help in distinguishing gold sources and potentially yield insights into geochemical processes operating during gold deposit formation [99]. Harhira et al [100] obtained a practical detection limit of 0.75 µg/g in gold-bearing rocks and also in drill core samples demonstrating the potential of the techniques for gold exploration studies.…”

Mid-Infrared Reflectance Spectroscopy of Oil Sands Minerals Based on Tunable Quantum Cascade Lasers

“…Other techniques such as energy-dispersive X-ray spectroscopy 2 and laser-induced breakdown spectroscopy have been used to study the elemental composition. 3 K40 gamma spectroscopy is widely used for on-line measurement of clay content but efforts are still needed to provide a reliable quantitative measurement. 4…”