Optimization of operating conditions in desulfurization of petroleum coke using induction heating

Abstract

The matrix structure and properties of petcoke samples can be impressed by uniform and in situ thermal treatment. In this work, a novel hyphenated thermal approach was applied to investigate the ferromagnetic-based desulfurization of petcoke samples and the effect of controlling parameters. Induction heating furnace and capillary gas chromatography (CGC) were designed and assembled to study the thermal desulfurization of ferromagnetic petcoke, which was prepared by penetration of some metallic elements (e.g., Fe, Cr, and Ni) into the coke framework. Based upon a design of experiment algorithm, the petcoke matrix, the evolved gases and the residue coke breeze were monitored by energy-dispersive X-ray spectroscopy mapping, CGC, and electrical resistivity measurements. The results revealed that during petcoke formation, ferromagnetic metals were diffused and distributed throughout the coke matrix leading to the acceleration of the induction heating in the second stage of thermal treatment. Moreover, the evolved gas analysis showed the role and the rank of drainage rate, particle size, desulfurization temperature, induction frequency, and feed humidity parameters on the yield of desulfurization process. The effect of magnetic desulfurization on the specific electrical resistivity of coke breeze was identified as an industrial opportunity to be used in the cathodic protection systems. K E Y W O R D Sferromagnetic desulfurization, induction heating, electrical resistivity, EDX mapping

Fouling propensity of pyrolytic coke particles in aqueous phase: Thermal and spectral analysis

“…According to the radical mechanism, some favorable thermodynamic reactions in radiant coil of the furnace lead to increase the fractional population of free radicals as coke precursors and to carry over into the exhaust gas stream 34 . The nickel and iron 35 in the metal structure of tubular reactor walls react with hot ethane and catalyze the byproduct of catalytic coke as filament structure 36 …”

The Effect of Residence Time and Stream Restrictions on the Precursors’ Structure and Coke Morphology

“…The coking process can be considered as a desired [1,2] or unwanted [3] process based on the nature of the coke structure. The fouling phenomenon caused by coke formation leading to the flow transfer [4,5] and thermal and mass transfer [6] restriction is a common phenomenon in oil streams.…”