The Effect of microwave frequency on dielectric properties and Pyrolysis of oil shales

In the present work, the effect of in situ electromagnetic retorting technologies on the oil shales was reviewed. In this literature review on oil shales dielectric properties, we found that the relative dielectric constant (ε′) and imaginary permittivity (ε″) decrease with increased frequency and remain constant at higher frequencies. Formation fluids and mineral-bound water also affect measured dielectric properties. This review presents and synthesizes prior work on the influence of applied frequency on the dielectric properties of oil shales that can aid in the future development of frequency specific in situ retorting technologies and oil shale grade assay tools. The results obtained revealed that this process can be efficiently used for the purpose. The oil shale seems related to the retorting of the shale and the products of the degradation of the kerogen. In addition, the obtained oil has interesting characteristics. It is more maltenic, less polar than the oils obtained by conventional pyrolysis