超声速气流低温固相反应合成系统研究

Investigation on low-temperature solid state synthetic system with supersonic airflow

针对目前传统低温固相反应装置存在的问题,为探索超声速气流低温固相反应合成系统开展化学反应的可能性,利用空气动力学原理,采用自行设计的固相反应器使反应物粒子在超声速气流条件下相互剧烈摩擦与碰撞,将动能转化为分子内能,并活化反应物粒子,快速实现化合物的低温固相合成。通过理论设计和数值模拟,提出环状喷管的气动布局,采用基于离散相的两相流模型对固相颗粒运动速度和轨迹进行模拟,获得了超声速气流低温固相反应器的速度云图和不同直径固相颗粒的运动学特性,采用红外表征、紫外表征和XRD表征对聚苯胺的固相合成进行了验证,研究结果表明:证实其应用于有机体系合成的可行性,与传统的固相反应设备相比,操作简单,反应时间大大减少。

To address the existing problems in traditional low-temperature solid state reaction and investigate the possibility of solid state synthetic system with supersonic airflow for chemical applications,a solid state synthetic system with supersonic airflow was designed according to the aerodynamic principle,which could make the reactant particles rub and collide violently.Then,the kinetic energy of particles was transformed into the molecular internal energy,and the reactant particles were activated at the same time.As a result,the synthesis of the compound was performed via the low-temperature solid state reaction.The aerodynamic layout of annular nozzle was proposed through the theoretical design and simulation.The two-step flow model based on discrete phase was used to simulate the velocity and trajectory of solid particles,and the velocity cloud of supersonic gas flow low-temperature solid state reactor and the kinematic characteristics of solid particles with different diameters were obtained.Furthermore the solid state synthesis of polyaniline was verified by infrared,ultraviolet and XRD.The results prove the feasibility of applying the solid state reaction to the synthesis of organic.Compared with traditional solid reaction equipment,the operation is simple and the reaction time is greatly reduced.