Modeling and Simulation Study of Ammonia Decomposition in Assisted-Membrane Fluidized Bed Reactors

Please enable javascript in your browser.

Khalili, Masoud | 2016

971 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48456 (06)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Molaei Dehkordi, Asghar
Abstract:
Increasing need for energy, non-renewable fossil resources and environmental pollution persuaded investigators to offer hydrogen as a clean alternative fuel. One of efficient methods for producing hydrogen is the ammonia catalytic cracking reaction. The present work the most to caused on the simulation of both 1D and 2D in an assisted-membrane tapered fluidized bed reactor. In 1D simulation several tubes of membrane placed inside the reactor, but in the case of 2D simulation two membrane tubes on the reactor walls were used. In 1D and 2D simulations the compartmental and Eulerian-Eulerian approach were used, respectively. The simulation results indicate that in a constant static bed height, increasing the tapered angle increases the residence time and improves the ammonia conversion and hydrogen separation. However, increasing tapered angle can have a negative impact on overall system performance. In addition, the study of feed velocity effects showed that the velocity reduction increase the residence time, results in improving the ammonia conversion and hydrogen separation
Keywords:
Eulerian-Eulerian Approach ; Hydrogen Separation ; Tapered Fluidized Bed ; Compartment Model ; Tapered-Angle ; Solid Particles Static Bed Height ; Ammonia Conversion

No TOC