A High-Concentration NOx Production System—Part 1: Optimization of the Quenching Rate

This article reports results of the design and experimental investigation of a high-flow and high-concentration NO_x production system based on a radio-frequency plasma torch for a variety of applications. The system includes a commercial APT-100 plasma torch with plume power from 25 to 35 kW, a double-stage quenching reactor with “fast” first stage and “slow” second stage, measuring unit, and auxiliary systems. The first stage allows quenching by any gas, such as air, air-based blends, and the products of recirculation.