过程质谱仪测量气体浓度快速变化过程的应用研究

通过实验研究了微型流化床多阶段原位反应分析仪（MFB-MIRA）检测快速气固反应气体逸出过程的适应性。研究表明,取样毛细管的伴热性能对在线测量的稳定性有重要影响。基于所得规律,将精密温控器配置于毛细管的伴热系统,毛细管温度的控制精度达到±0.2℃,从而实现了取样流量和腔室真空度的稳定化。实测结果表明,改造后在线测量的周期性波动消失,稳定性显著提高。空气中O2测量响应的波动度和30 s相对标准偏差由1.9%和0.5%,优化至1.4%和0.2%。同时还开发了精确控制取样点绝对压力的调节装置,使取样点绝对压力的控制精度达到±0.02 k Pa。实验结果表明,取样点绝对压力与过程质谱仪的响应呈正相关,...

Full description

Saved in:
Bibliographic Details
Published in分析化学 Vol. 44; no. 9; pp. 1335 - 1341
Main Author 郭洋洲 赵义军 刘鹏 冯冬冬 孟顺 钱娟 孙绍增
Format Journal Article
LanguageChinese
Published 哈尔滨工业大学，能源科学与工程学院，燃煤污染物减排国家工程实验室，哈尔滨150001 2016
Subjects
取样流量
微型流化床
真空度
稳定性
过程质谱仪
Sampling flow rate
Micro fluidized bed
Vacuum
Stability
微型流化床
真空度
稳定性
Process mass spectrometry
取样流量
过程质谱仪
Online AccessGet full text
ISSN0253-3820
DOI10.11895/j.issn.0253-3820.160180

Cover

More Information
Summary:通过实验研究了微型流化床多阶段原位反应分析仪（MFB-MIRA）检测快速气固反应气体逸出过程的适应性。研究表明,取样毛细管的伴热性能对在线测量的稳定性有重要影响。基于所得规律,将精密温控器配置于毛细管的伴热系统,毛细管温度的控制精度达到±0.2℃,从而实现了取样流量和腔室真空度的稳定化。实测结果表明,改造后在线测量的周期性波动消失,稳定性显著提高。空气中O2测量响应的波动度和30 s相对标准偏差由1.9%和0.5%,优化至1.4%和0.2%。同时还开发了精确控制取样点绝对压力的调节装置,使取样点绝对压力的控制精度达到±0.02 k Pa。实验结果表明,取样点绝对压力与过程质谱仪的响应呈正相关,准确控制取样点绝对压力非常必要。本研究提高了过程质谱仪测量结果的准确性和重复性,提升了MFB-MIRA分析快速气固反应的适应性,进而拓宽了MFB-MIRA及过程质谱仪可靠应用的范围。
Bibliography:GUO Yang-Zhou, ZHAO Yi-Jun, LIU Peng, FENG Dong-Dong, MENG Shun, QIAN Juan, SUN Shao-Zeng （School of Energy Science and Engineering, National Engineering Laboratory for Reducing Emissions from Coal Combustion, Harbin Institute of Technology, Harbin 150001, China）
22-1125/O6
Micro fluidized bed; Process mass spectrometry; Sampling flow rate; Vacuum; Stability
Experiments were conducted to investigate the suitability of the multistage in-situ reaction analyzer based on a micro fluidized bed（ MFB-MIRA） for measuring the rapid change of the gas concentration during gas-solid reactions. The results showed that the control performance of capillary temperature had a great impact on the stability of on-line measurement. Based on the observed regular patterns,the capillary temperature control system was equipped with a precision temperature controller. The control precision of capillary temperature reached ± 0.2℃,which guaranteed the high stabilities of the sampling flow rate and the chamber vacuum. The measured results
ISSN:0253-3820
DOI:10.11895/j.issn.0253-3820.160180