Standoff characterization of high-molecular components of oil disperse systems

ABSTRACT Here we report work done toward standoff ch aracterization of high -molecular components responsible for forming nano -structures in oil disperse s ystem. Complex physical and chemical studies have been conducted specifically on bitumen extracted from rich an d poor grade oil sand from Canada . S tandoff characterization of oil disperse system high -molecular components is discussed here based on prospective of ultra -fast broadband tunable MWIR laser absorption spectroscopy. Keywords: oil nano -structures, resin asphaltenes aggregates , vanad yl porphyri nes, laser absorption spectroscopy, ultrafast laser, quantum cascade laser, oil sands. 1. INTRODUCTION For years , analytical chemistry techniques have been developed for characterization of high -molecular co mponents of oil disperse system s. Despite the best efforts made, characterization of oil disperse systems in real environment remains a challenge. Many of these techniques rely on sensitive laboratory equipment that may not be used outdoor and its sensitivity can be affected by environmental interferences. To avoid such problems fast and sensitive mid -infrared (MWIR) laser spectroscopy techniques has been exploited for standof f characterization of oil components .. O il system is a colloidal mixture of complex hydro ca rbons that may be classified as saturated hydrocarbons, aromatic hydrocarbons, resins and asphaltenes. Complex analytic physical and chemistry techniques have been developed in order to characterize oil systems, including mass -spectrometry, chromato graphy -mass spectrometry, NMR -spectroscopy, EPR -spectroscopy, FTIR -spectroscopy and many other techniques. In this paper we are reporting a possibility t o apply complex analytical data received on oil high -molecular components for calibrat ion of MWIR laser spec troscopy data . C orrelations be tween different oil high molecular components and laser MWIR spectra can be used for standoff characterization of high -molecular components . Therefore, it comb ines accuracy of laboratory analytical techniques and efficiency of laser MWIR absorp tion spectroscopy that is widely used in standoff explosive trace detection and standoff chemical characterization. MWIR standoff detection and characterization of complex molecular spectra based on applications of novel broadband and tu nable MWIR lasers . Vibration spectra of high -molecular components of oil disperse systems are specifically rich in 6 to 12 microns region where they presented by multiple spectral lines forming ³ILQJHUSULQWV´ with unique combination of spectral line s frequ encies and intensities. ____________________________ *ganeeva@iopc.ru ; ph. +7(843)273 18 62