Abstract: In the fixed bed reactor with a quartz tube, the effects of NO concentration, soot species, CO₂, O₂ concentration in the feed gas on the non-catalyzed reaction between soot and NO were investigated.The experimental materials individually came from the soot formed in diffusion flame in natural gas, candle or butane, and a kind of bituminous coal coke was also taken as experimontal material.The results showed that the reaction between soot and NO proceeded well with a sharp initial reaction temperature.The reaction between natural gas soot and NO showed a higher rate of NO reduction and a lower initial reaction temperature than the other soot species.The initial reaction temperature was higher with increasing inlet NO concentration.The presence of O₂ in the feed gas lowered the initial reaction temperature and the maximum reaction temperature of the soot reaction with NO.The presence of CO₂ in the feed gas had no effect on the reaction of natural gas soot with NO,but resulted in a lower initial reaction temperature of candle soot and coke reaction with NO, and separated the whole reaction process into two stages.

摘要： 在管式炉石英固定床反应器上研究了程序升温条件下炭黑与NO反应的规律，主要研究了不同NO浓度、温度条件下不同炭黑、反应气中存在CO₂、O₂及其浓度改变时炭黑对NO的还原规律等.实验材料为在扩散火炬中取样得到的天然气炭黑、蜡烛炭黑、丁烷火焰炭黑，同时还选用了一种烟煤焦炭.实验结果表明：各炭黑试样与NO的反应有明确的起始反应温度和较好的反应规律;天然气炭黑比其他炭黑具有更高的脱除率、最低的起始反应温度;炭黑的起始反应温度随着NO反应气浓度增大而升高;反应气中氧存在可以降低炭黑-NO起始反应温度和反应程度最大点温度;反应气中CO₂存在对天然气炭黑反应无影响，可以降低蜡烛炭黑和焦炭与NO起始反应温度，使反应分成两个阶段.