Pollutant Formation in Combustor Cool Zone

该项目解决了冷区污染物（二恶英和呋喃除外）的形成，冷区是燃烧器火焰下游的区域，其中自由基猝灭和表面催化是主要的反应模式。使用双室反应器，其中第一个室容纳扩散火焰，第二个室（模拟冷区）可以配置为研究气相反应，壁和表面效应，或由夹带颗粒催化。用气相色谱法分析两个腔室的流出物。该研究使用甲烷作为燃料，并掺杂乙烯、苯或三氯苯。还可以在燃烧器的排出物中加入掺杂剂，使用氯化氢、氮氧化物和水。研究的表面包括二氧化硅，掺杂氧化铜或氧化铁的二氧化硅，模型飞灰，以及来自城市固体废物焚烧炉和燃煤炉的真实飞灰。这项工作提供了关于污染物形成的基本数据，并为减少焚化炉、发电厂和供热厂以及工业操作的污染物排放的战略提供了合理的基础。

This project addresses the formation of pollutants (other than dioxins and furans) in the cool zone--the region downstream from the flame in a combustor where radical quenching and surface catalysis are the dominant modes of reaction. A dual-chamber reactor is used in which the first chamber houses a diffusion flame and the second chamber (simulating the cool zone) can be configured to study gas-phase reactions, wall and surface effects, or catalysis by entrained particles. Effluents from both chambers are analyzed by gas chromatography. The study uses methane as a fuel pure and doped with ethylene, benzene or trichlorobenzene. Dopants can also be added to the effluent of the combustor, hydrogen chloride, nitrogen oxides, and water are used. Surfaces studied include silica, solica doped with copper oxide or iron oxide, a model fly ash, and real fly ashes from a municipal solid-waste incinerator and a coal combustor.This effort provides fundamental data on formation of pollutants and provides a rational basis for strategies to reduce pollutant emissions from incinerators, power and heating plants, and industrial operations.