Design of new tapered-bed Dielectric Barrier Discharge reactor for atmospheric-pressure plasma modification of starch

摘要: Abstract A new Tapered Fluidized-Bed Dielectric Barrier Discharge (TBD) reactor was designed in order to better utilize Non-thermal plasma technology at atmospheric-pressure for improving the functionality of biopolymers powder. feasibility study completed and potato starch successfully modified by TBD prepare high temperature drilling according NISOC (National Iranian South Oil Company) standard specification. The excitation energy measured using line-ratio method optical emission spectroscopy equal 0.7–0.73eV. electron density 3 × 1016cm−3 determined Stark broadening atomic argon spectrum λ = 696.5 nm. optimum values energy, plasma-granules interactions time gas flow rate as main factors modification experiments were achieved response surface methodology. Thermogravimetric analysis indicated an increase thermal resistance due crass-linking reaction with non-chemical plasma. Modified native used water-based mud additive rheological study. After hot rolling muds 121 °C, desired reductions both viscosity (by 15%) fluid loss 30%) observed.