论文部分内容阅读
采用固定床微分管式反应器进行了一系列不同湿度下的等温实验，对ｋＯ２－Ｈ２Ｏ－ＣＯ２反应系统的行为进行了观察，着重观察了温度和湿度对反应系统的影响。共进行了２３次实验，其中在中等湿度（５５％ＨＲ）下进行了１３次实验，高湿度（７５％ＨＲ）下进行了７次实验，低湿度（３３％ＨＲ）下进行了３次实验。此外，还对所用的ＫＯ２／ＮａＯ２；样品进行了热分析（ＴＧＡ和ＤＳＣ）试验。初步实验结果揭示了一些在积分反应器中无法观察到的现象，这些结果对反应器的合理设计具有一定的指导意义。实验表明，反应床的温度对ＫＯ２－Ｈ２Ｏ－ＣＯ２反应系统的行为具有重要的影响。升高温度，该反应系统的产Ｏ２速率、ＣＯ２吸收速率以及Ｈ２Ｏ吸收速率均显著降低，并且随着温度的变化，反应固体（固体反应物和固体产物）发生不同的结构变化。在室温（２０℃）下，固体产物发生显著的膨胀，造成反应床严重结块；在温度升高时，ＫＯ２则可能发生烧结，使其颗粒间发生相互融合，致使其孔隙率降低和孔隙孔口闭合，进而导致ＫＯ２不能反应完全。湿度对反应系统的行为也有很大影响。增加进气的湿度，使该系统的产Ｏ２速率、ＣＯ２吸收速率以及ＨＯ２吸收率均提高。但是湿度增加，反应床吸Ｈ２Ｏ量增加，致?
A series of isothermal experiments at different humidities were carried out in a fixed-bed microtube reactor. The behavior of the kO2-H2O-CO2 reaction system was observed. The effects of temperature and humidity on the reaction system were observed. A total of 23 experiments were conducted, of which 13 experiments were performed at moderate humidity (55% HR), 7 experiments at high humidity (75% HR) and 3 experiments at low humidity (33% HR) . In addition, thermal analysis (TGA and DSC) tests were performed on the KO2 / NaO2 samples used. Preliminary experimental results revealed some of the phenomenon can not be observed in the integral reactor, the results of the rational design of the reactor has some guidance. Experiments show that the temperature of the reaction bed has an important effect on the behavior of KO2-H2O-CO2 reaction system. The reaction temperature, O2 production rate, CO2 absorption rate and H2O absorption rate of the reaction system were significantly decreased, and with the temperature changes, the reaction solid (solid reactants and solid products) different structural changes occur. At room temperature (20 ° C), the solid product significantly expands, resulting in serious agglomeration of the reaction bed. At elevated temperatures, KO2 may sinter, resulting in intergranular fusion, resulting in reduced porosity and porosity Closure of mouth, which led to KO2 can not be completely reacted. Humidity also has a large effect on the behavior of the reaction system. Increasing the humidity of the intake air increases the O2 production rate, CO2 absorption rate and HO2 absorption rate of the system. However, the humidity increases, the reaction bed to absorb the amount of H2O increased, caused?