FORMATION OF POLYCHLORINATED DIOXINS, FURANS, BENZENES AND PHENOLS IN THE POSTCOMBUSTION REGION OF A HETEROGENEOUS COMBUSTOR - EFFECT OF BED MATERIAL AND POSTCOMBUSTION TEMPERATURE
FORMATION OF POLYCHLORINATED DIOXINS, FURANS, BENZENES AND PHENOLS IN THE POSTCOMBUSTION REGION OF A HETEROGENEOUS COMBUSTOR - EFFECT OF BED MATERIAL AND POSTCOMBUSTION TEMPERATURE
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DOI：
10.1021/es00005a004
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发表时间：
1995-05-01
影响因子：
11.4
通讯作者：
ALTWICKER, ER
中科院分区：
文献类型：
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作者：
GHORISHI, SB;ALTWICKER, ER
喷射床燃烧器燃烧区下游的多氯二苯并-对-二恶英和二苯并呋喃（以下称为 PCDD/F）的形成在 430-390 摄氏度的温度范围和细砂颗粒存在下在几秒钟内被非均相催化。在显着降低的温度下或存在细石英颗粒的情况下，未观察到 PCDD/F 的形成。两种不同的床材料（沙子和石英）与 10%（摩尔）1,2-二氯苯正庚烷溶液的燃料混合物一起使用。在燃烧后区域还观察到除起始燃料和氯酚（CPhs）之外的氯苯（CB）。在沙子存在的情况下，主要形成三氯苯和二氯酚。将 PCDD 形成的均相气相机制的预测与实验数据进行比较，以揭示表面反应对 PCDD/F 形成的可能影响。
The formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (hereafter called PCDD/Fs), downstream from the combustion zone of a spouted bed combustor was heterogeneously catalyzed within seconds in the temperature range 430-390 degrees C and in the presence of fine sand particles. The PCDD/Fs formation was not observed at substantially lower temperatures or in the presence of fine quartz particles. The two different bed materials, sand and quartz, were used together with a fuel mixture of 10% (mole) 1,2-dichlorobenzene in n-heptane. Chlorobenzenes (CBs) other than the starting fuel and chlorophenols (CPhs) were also observed in the post-combustion region. Formation of trichlorobenzenes and dichlorophenols dominated in the presence of sand. Predictions of a homogeneous gas phase mechanism for the formation of PCDDs were compared to the experimental data to reveal possible influences of surface reactions on the formation of PCDD/Fs.