Ammonia Synthesis Using Magnetically Induced Reaction

摘要

Ammonia production is a high energy and capital intensive industry as it requires high temperature (400-500℃) and high pressure (150-300 bar) for its daily operations. By introducing nano-catalyst with the new concept of micro-reactor with applied magnetic field induction, the catalytic activity can be induced and the output can be enhanced. Magneto-dynamics will be introduced in the ammonia production process in order to replace the concept of thermodynamics in the Haber Bosch process. The nanocatalysts (Y_3Fe_5O_(12), Fe_2O_3, MnO, Mn_(0.8)Zn_(0.2)Fe_2O_4) have been reduced by using the temperature reduction method (TPR). The Y_3Fe_5O_(12) (YIG) catalyst with magnetic induction produced242.56μmol/h.g-cat output of ammonia which is 2% much higher than ammonia synthesis without magnetic induction (237.52 μmol/g.h).The ammonia output based on the magnetic induction method at a temperature of 0℃ is 242.56μmole/h.g-cat which is 0.90% higher than the synthesis at 25℃ temperature (240.4 μmol/g.h). The ammonia output at 0.2Tesla is 249.04 μmole/h.g-cat which is higher 2.6% than the output at 0.1 Tesla which is 242.56μmol/g.h. It is proven that the higher the applied magnetic field is, the more effective the catalytic activity will be as a better alignment of the electron spin of the catalyst occurs and enhances the adsorption and desorption process. Y_3Fe_5O_(12) (YIG) shows the best catalytic reaction followed by Fe_2O_3 (hematite) and MnO (manganese oxide). By this new route, synthesis of ammonia at low temperature is realized and offers ammonia producers an economic advantage compared to the classical routes.