Pollutant Formation in Combustor Cool Zone

该项目解决了污染物(二恶英和呋喃除外)在冷却区--燃烧室中火焰下游的区域--形成的问题，在该区域，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，其中第一室容纳扩散火焰，第二室(模拟冷却区)可被配置为研究气相反应、壁面和表面效应，或携带颗粒的催化。用气相色谱分析两个腔室的流出物。这项研究使用甲烷作为纯燃料，并掺入乙烯、苯或三氯苯。还可以将掺杂剂添加到燃烧室的流出物中，使用氯化氢、氮氧化物和水。所研究的表面包括二氧化硅、掺铜或氧化铁的Solica、模型飞灰以及来自城市生活垃圾焚烧炉和燃煤焚烧炉的真实飞灰。这项工作提供了污染物形成的基本数据，并为减少焚烧炉、发电厂和供热厂以及工业运营的污染物排放提供了合理的基础。

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.