Modeling of Deactivation of Midrex Reforming Process and Structural Changes of Nano Pores

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Banisharif Dehkordi, Farhad | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43385 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Baghalha, Morteza
Abstract:
In this study, deactivation of Midrex reforming catalysts is evaluated kinetically by 3.5-year data of Mobarakeh Steel Company direct reduction site. The variation of Midrex catalyst’s structure is characterized by XRD and BET test. Two deactivation mechanism are characterized, methane cracking carbone deposition and sintering. The project results demonstrate that victorious mechanism is carbon deposition. The methane cracking carbone cause layer by layer deactivation of catalyst during 5.5 months. Although, XRD and BET showed pore volume and radius reduction and Ni crystal increasing, approximated constant activity of catalyst were approved by kinetic evaluation
Keywords:
Kinetics Modeling ; Catalyst Deactivation ; Nanopore ; Midrex Shaft Farnace ; Reforming Reactor

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