AMMONIA SYNTHESIS BY USING MAGNETIC INDUCTION METHOD (MIM)

• Main Author: RR., POPPY PUSPITASARI
• Format: Thesis
• Language: English
• Published: 2012
• Subjects: Instrumentation and Control
• Online Access: http://utpedia.utp.edu.my/id/eprint/21669/1/2012%20-ELECTRIC-AMMONIA%20SYNTHESIS%20BY%20USING%20MAGNETIC%20INDUCTION%20METHOD%20%28MIM%29-%20RR.%20POPPY%20PUSPITASARI.pdf; http://utpedia.utp.edu.my/id/eprint/21669/

The Haber Bosch process for ammonia synthesis which includes the small surface area catalyst and high energy is not suitable for green ammonia production. Therefore, new type of catalysts, namelyMno 8Zno.zFez04 and Y3Fe5012, with their synthesis methods and characterizations were observed. New type of reactors (lab-scale reactor and Y-shape microreactor) was designed to enable ammonia to be produced at room temperature and ambient pressure. X-Ray Diffraction (XRD) analysis indicated the major peak of Mno.sZno.2Fez04 and Y3Fe5012 are at [311] and [ 420] planes, respectively. Field emission scanning electron microscopy (FESEM) revealed the size of nanoparticles of Mno.sZno.zFez04 and Y3Fes01zwas in the range 30nm to 120nm. Magnetic properties of the nanocatalysts were measured by vibration sample magnetometry (VSM). The value of magnetization saturation (Ms) for Mno.sZno.zFez04 is 40.3 emu/g and Y3Fes012 is 16.6 emu/g. The electron diffraction pattern confirmed the presence of [311] plane. The value of d-spacing for Mno.sZno.zFez04obtained from transmission electron microscope (TEM) was 2.8A.Permeability value for Mn0 8Zn02Fez04 is almost 10 times higher than that of Y3Fes012. Mechanical properties were determined by using Microhardness Vickers instrument. The values of Hardness Vickers Number (HVN) for catalyst synthesized via sol-gel, self-combustion, and ball milling methods were 102.56 HVN, 75.83 HVN, and 29.32 HVN, respectively.