Y I Imanbayev
Institute of Combustion Problems, Kazakhstan
Title: Changing the structure of resin-asphaltenes molecules in cracking
Biography
Biography: Y I Imanbayev
Abstract
Natural bitumen in tar sands deposits represents a very rich source of energy potentially. At the same time accessible to the main part of those stocks is difficult, and for the conversion of low-sulfur liquid bitumen products you require non-standard solutions, since the properties of conventional oil and bitumen are significantly different. To extract the bitumen must first carry out hydraulic fracturing, and only after that you can use thermal production methods. Currently, commercial production of bitumen in Canada is carried out using mining methods. The objective of the study was to collect a sample of the tar sand Beke field (Kazakhstan), extract of sand and extracted asphaltenes from organic part, as well as products of their transformations during thermal processing. The molecular weight of tars and asphaltenes of natural bitumen and their cracking products measured by cryoscopic in naphthalene created in Institute of Petroleum Chemistry on Krion instrument. Elemental characteristics of samples were determined by elemental analyzer Vario MICRO cube (Germany). Monte Carlo method was used to construct the molecular structure of macromolecular compounds. Constructing molecular structure program is written in Fortran Version 6.6. The developed program for the construction of molecular structure used as input parameters analytical data and calculated using the structural-group analysis. The input parameters are the analytical data obtained from elemental analysis, PMR spectroscopy, molecular weight of tars and asphaltenes. The calculations data determined the most stable conformation of tars and asphaltenes molecules. It was found that the stability of the molecules affect structural characteristics such as the number of structural blocks, their size and spatial arrangement of atoms with respect to each other. Consisting of more structural blocks of smaller size molecules are more thermodynamically stable as compared to mono block structure. Constituting molecules characterized as thermodynamically more stable than a non-layered structures.