快速制取稳定浓度甲醛混合气的实验条件探索
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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.
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
[1]张长斌,贺泓,王莲,等.负载型贵金属催化剂用于室温催化氧化甲醛和室内空气净化[J].中国科学,2009,54(3):278-286.
[2]何运兵,纪红兵,王乐夫.室内甲醛催化氧化脱除的研究进展[J].化工进展,2007,26(8):1104-1109.
[3]杨玉华,李利军,刘延东.酚试剂分光光度法测定空气中甲醛浓度的影响因素[J].化学建材,2005,21(3):9-11.
[4]张文涛,张鹏,焦元启,等.基于酚试剂分光度法对家具中甲醛释放量的测定[J].东莞理工学院学报,2016(3):62-64.
[5]韩晓.纤维负载锰氧化物催化剂的制备及其室温降解甲醛性能研究[D].北京:北京建筑大学,2015.
[6] FAN Y Q,ZHOU T,LI Y P. Determination of Formaldehyde in Air by Direct Injection Capillary Gas Chromatography[J]. Modern Preventive Medicine,2005,32(10):1396-1397.
[7]于涛,朱尽顺.用乙酰丙酮法检测纺织品中的甲醛含量[J].中国纤检,2017(1):72-75.
[8]吴丹.室内甲醛的来源危害及检测甲醛方法比对分析[J].化工管理,2016(6):149.
[9]韩晓.纤维负载锰氧化物催化剂的制备及其室温降解甲醛性能研究[D].北京:北京建筑大学,2015.
[10]骆高丹.甲醛气体的催化净化处理及快速检测方法的研究[D].广州:广东工业大学,2017.
[11]朱明华,张宁凡.室内空气中甲醛浓度检测方法的比较[J].河南建材,2016(1):9-10.
[12]王文辉,王磊,袁圆,等.一种基于BP神经网络的甲醛测量仪设计[J].数字技术与应用,2017(11):127-130.
[13]范子亮.关于甲醛鞣制毛皮制品的甲醛挥发性的研究及思考[J].西部皮革,2017,39(19):30-31.
[14]许波,陈振乾.建材内甲醛散发参数处理方法及实验研究[J].化工学报,2017,68(S1):43-47.
[2]何运兵,纪红兵,王乐夫.室内甲醛催化氧化脱除的研究进展[J].化工进展,2007,26(8):1104-1109.
[3]杨玉华,李利军,刘延东.酚试剂分光光度法测定空气中甲醛浓度的影响因素[J].化学建材,2005,21(3):9-11.
[4]张文涛,张鹏,焦元启,等.基于酚试剂分光度法对家具中甲醛释放量的测定[J].东莞理工学院学报,2016(3):62-64.
[5]韩晓.纤维负载锰氧化物催化剂的制备及其室温降解甲醛性能研究[D].北京:北京建筑大学,2015.
[6] FAN Y Q,ZHOU T,LI Y P. Determination of Formaldehyde in Air by Direct Injection Capillary Gas Chromatography[J]. Modern Preventive Medicine,2005,32(10):1396-1397.
[7]于涛,朱尽顺.用乙酰丙酮法检测纺织品中的甲醛含量[J].中国纤检,2017(1):72-75.
[8]吴丹.室内甲醛的来源危害及检测甲醛方法比对分析[J].化工管理,2016(6):149.
[9]韩晓.纤维负载锰氧化物催化剂的制备及其室温降解甲醛性能研究[D].北京:北京建筑大学,2015.
[10]骆高丹.甲醛气体的催化净化处理及快速检测方法的研究[D].广州:广东工业大学,2017.
[11]朱明华,张宁凡.室内空气中甲醛浓度检测方法的比较[J].河南建材,2016(1):9-10.
[12]王文辉,王磊,袁圆,等.一种基于BP神经网络的甲醛测量仪设计[J].数字技术与应用,2017(11):127-130.
[13]范子亮.关于甲醛鞣制毛皮制品的甲醛挥发性的研究及思考[J].西部皮革,2017,39(19):30-31.
[14]许波,陈振乾.建材内甲醛散发参数处理方法及实验研究[J].化工学报,2017,68(S1):43-47.