Ammonia Synthesis Using Magnetically Induced Reaction

Abstract

Abstract. Ammonia production is a high energy and capital intensive industry as it requires high temperature (400-500 o C) 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 3 Fe 5 O 12 , Fe 2 O 3 , MnO, Mn 0.8 Zn 0.2 Fe 2 O 4 ) have been reduced by using the temperature reduction method (TPR). The Y 3 Fe 5 O 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°C is 242.56µmole/h.g-cat which is 0.90% higher than the synthesis at 25°C 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 0.1Tesla 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 3 Fe 5 O 12 (YIG) shows the best catalytic reaction followed by Fe 2 O 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.

Ammonia synthesis catalyst 100 years: Practice, enlightenment and challenge

“…Enormous energy consumption greatly limits the industrial application of these two methods. In recent years, ammonia synthesis by the plasma [89][90][91][92], the magnetic induction method [93] and other studies are also active, but they are still in the exploratory stage.…”

“…因为占能 耗30%左右的动力消耗主要为合成服务 [88] . [89][90][91][92] , 磁 诱导法合成氨 [93] 等的研究方面也较活跃, 但目前仍处于 [70,[95][96][97] . 例如对于在Fe催化剂上, G. Ertl [98] 提出了一 个基于N 2 解离吸附的合成氨催化反应机理及其热化学 动力学位能图(图1).…”

Enhanced Catalytic Activity of α-Fe₂O₃ with the Adsorption of Gases for Ammonia Synthesis

“…Thermo-magneto dynamics favors green fertilizer technology as chemical reactions can be effected by magnetic fields which can alter the yield [3,4]. Yahya.et.al introduced the synthesis of green fertilizer at ambient conditions of temperature and pressure by magnetic induction method (MIM) using different magnetic nanocatalysts [5]. Iron oxides have been investigated for their potential use in a wide range of important applications, such as catalysis, electrochemistry, magnetization, biomedical science, as pigments in ceramic glazes, and in environmental applications.…”