本文分析了光催化反应器降解有机挥发化合物(VOCs)的特性,提出了反应器总降解常数的概念,提出了一种测量光催化反应器性能参数-传质单元数、反应有效度和总降解常数的方法.管状光催化反应器降解空气中微量甲醛的实验验证了该方法的可行性.实验表明:在空气温度22～24℃,空气湿度40%附近,甲醛的光催化反应在不同浓度区间近似为一次反应,在1.6～12.4 mg/m3浓度区间内其总降解常数最大.
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