摘要
针对甲醛催化氧化脱除研究中获得稳定初始浓度的甲醛混合气所需时间长的问题,采用红外光声谱气体监测仪对甲醛浓度进行实时监测,考察了甲醛溶液注射量、甲醛挥发过程强化以及移出源头等对模拟仓中甲醛浓度的影响,发现减少甲醛溶液注射量和加热强化能够缩短甲醛挥发时间,但仍难以获得稳定浓度的甲醛混合气;而将加热强化和移出甲醛源头结合起来,在半小时内即可获得稳定浓度的甲醛混合气,大大缩短了实验前处理所需时间,为后续催化剂性能评价奠定了良好的基础,在甲醛催化氧化脱除研究中具有重要意义。
In order to solve the problem of long time to obtain stable initial concentration of formaldehyde mixture in catalytic oxidation of formaldehyde,this paper uses infrared photoacoustic spectroscopy gas monitor to monitor formaldehyde concentration in real-time,exploring the effects of formaldehyde injection amount,formaldehyde volatilization intensification and removal of formaldehyde from the source on the concentration of formaldehyde in the simulated warehouse. Reducing the injection amount of formaldehyde solution and heating intensification can shorten the volatilization time of formaldehyde,but it is still difficult to obtain stable concentration of formaldehyde mixture. By combining heating strengthening with removing formaldehyde from the source,a stable concentration of formaldehyde mixture can be obtained within half an hour,which greatly shortens the time required for experimental time. Thus the work lays a solid foundation for the follow-up performance evaluation of catalysts and exhibits great significance in the catalytic oxidation of formaldehyde.
引文
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