The complex permittivity at 2.16 GHz of o-xylene, m-xylene, toluene, and ethylbenzene was measured using a resonant cavity under ultra-fast microwave heating. A first-in-class dual-mode (heat and measure) microwave cylindrical cavity with two separate microwave systems without interferences was used. Results show that the maximum temperature reached by each aromatic solvent is proportional to the dipole moment. The loss term as a function of temperature presents an additional term, 1/T2 which indicates the presence of an additional induced dipole moment with a non-linear polarizability term u3/ (kT)2. This term comes from having a strong electric field and the lack of thermal equilibrium. The system showed low sensitivity to temperature for the low dielectric constant values. In addition, the system was tested for non-thermal effects and temperature discrepancies, and none of these effects were observed.

Dielectric losses of polar aromatic components of crude oil under ultra-fast heating

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.