双室型乏风预热催化氧化装置的氧化特性

搭建了双室型乏风预热催化氧化实验装置，实验研究了空速、氧化床入口温度、入口甲烷体积分数对其氧化特性的影响规律。结果表明：试验装置能够实现自维持稳定运行，转化率均大于92%，且具有良好的对称性；随空速的增大，甲烷转化率变化较小，空速大于7 100 h-1后，转化率下降；有效反应长度随空速的增大而增大，且增大的速率逐渐加快；随入口温度的升高，甲烷转化率上升，在485 ℃时达到最大值，有效反应长度显著减小，但减小的速率逐渐变缓；随体积分数的增加，甲烷转化率波动不大(95%左右)，氧化床整体温度上升，有效反应长度略有下降。

Oxidation characteristics of ventilation air methane preheating catalytic oxidation reactor with dual chamber

A ventilation air methane (VAM) preheating catalytic oxidation reactor with dual chamber was built,and the effect of space velocity,intake temperature and methane concentration on oxidation characteristics of the reactor were studied experimentally.The results show a good symmetry in the reactor and the steady self-maintenance running was successfully realized (the methane conversion rate was more than 92%).The methane conversion rate remained unchanged first and decreased when the space velocity was over 7 100 h-1.The effective reaction length extended with the increase of space velocity and the rate increased gradually.With the increase of intake temperature,the methane conversion rate increased and reached its maximum when the temperature was 485 ℃,the effective reaction length was shorten dramatically.With the increase of methane concentration,the change of methane conversion rate was not distinct (about 95%),the temperature of oxidation bed increased and the effective reaction length decreased a little.The above results may provide a theoretical guidance for the extensive application of VAM preheating catalytic oxidation reactor.