【作者】 杨辉； 王盼； 庞树峰； 张韫宏；

【Author】 YANG Hui;WANG Pan;PANG Shu-feng;ZHANG Yun-hong;Institute of Chemical Physics,Beijing Intitute of Technology;

【机构】 北京理工大学物理化学实验室；

【摘要】 采用ATR-FTIR光谱法研究了不同OIRs(有机物与无机物的摩尔比)的丙酮酸钠/氯化铵混合气溶胶的吸湿性和反应性。结果表明,丙酮酸钠和氯化铵反应生成氯化钠、丙酮酸和氨气。当OIR=1:2时,两次降湿过程的风化点分别为56.6%±2.5%和68.6%±2.5%,两次升湿过程的潮解点分别78.2%±2.5%和82.0%±2.5%。当OIR=2:1时,两次降湿过程的风化点分别为58.4%±2.5%和62.5%±2.5%,由于第一次降湿过程反应完全,两次升湿过程的潮解点均为80.2%±2.5%。更多还原

【Abstract】 The hygroscopicity and reactivity between internally mixed aerosols composed of sodium pyruvate and ammonium chloride with different organic to inorganic molar ratios(OIRs) have been investigated by using the attenuated total reflectance Fourier transform infrared(ATR FTIR).The results showed that sodium pyruvate could react with ammonium chloride to form sodium chloride,pyruvic acid and ammonia.The first and second efflorescence relative humidity(ERH) for mixed aerosols with OIR of 1 : 2 are 56.6%±2.5% and 68.6%±2.5 %,respectively.And the deliquescent relative humidities(DRH) during two RH cycle are 78.2%±2.5 % and 82.0%±2.5%.For the aerosols with a mixing ratio of 2 : 1,the ERH increased from 58.4%±2.5% to 62.5%±2.5%,and the DRH is 80.2%±2.5% when the dehydration and hydration processes were repeated twice.更多还原