OXIDATION OF NO INTO NO2 OVER ACTIVE-CARBON FIBERS
OXIDATION OF NO INTO NO2 OVER ACTIVE-CARBON FIBERS
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DOI：
10.1021/ef00048a024
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发表时间：
1994-11-01
期刊：
影响因子：
5.3
通讯作者：
YOSHIKAWA, M
中科院分区：
文献类型：
--
作者：
MOCHIDA, I;KISAMORI, S;YOSHIKAWA, M
研究了在室温下活性炭纤维上催化氧化NO（400 ppm）为NO2，以捕获未反应的NO以及以硝酸或其盐形式存在的氧化产物，从而开发了氧化去除烟气中NO的方法。对一种表面积相当小的沥青基活性炭纤维进行热处理，发现其活性显著提高，在25 ℃、1.0 × 10（-2）g min mL（-1）的W/F下，在干燥空气中的转化率为82%，在80%相对湿度（rh）下的转化率为65%，在湿空气（100%rh）下的转化率为21%。通过改变湿度来检测氧化速率，发现在80%相对湿度以上，活性显著降低。通过在800 ℃下对纤维进行热处理，缓和了湿度对原样纤维活性的强烈阻滞。其他沥青和聚丙烯腈基纤维的催化活性也在干燥和潮湿的空气中进行了检查，发现它们在80%RH以上的潮湿空气中的活性较差。
Catalytic oxidation of NO (400 ppm) into NO2 was studied over active carbon fibers at room temperature to trap the unreacted NO as well as the oxidized product in forms of nitric acid or its salts to develop an oxidative removal of NO in the flue gas. The heat treatment of a particular pitch-based active carbon fiber of rather small surface area was found to enhance markedly the activity to allow the conversion of 82% in dry, 65% in 80% relative humidity (rh) and 21% in wet (100% rh) air, respectively, at 25 degrees C by W/F of 1.0 x 10(-2) g min mL(-1). The rate of oxidation was examined by varying humidity to reveal marked decrease of the activity above 80% rh. The strong retardation by humidity of the activity of as-received fiber was moderated by the heat treatment of the fiber at 800 degrees C. The catalytic activities of other pitch- and poly(acrylonitrile)based fibers were also examined in dry and wet air to find their inferior activity in wet air above 80% rh.