The increase in the occurrence of so called opportunity crude blends present distinct problems to refiners, such as increased occurrences of fouling and corrosion, owing to the fact that their processing properties are relatively unknown. The work presented here describes a pyrolysis technique for examining the potential fouling tendency for various feeds types, and introduces a novel method for providing a relative ranking system, or index, which considers the rates of surface and bulk coke formation together with stability parameter changes with process severity. The data provides a unique insight into cracking behaviour and has permitted the development of a systematic approach to the selection antifoulant additives to assist unit engineers achieve operational targets, as is demonstrated by discussion of a recent case study.

Characteristics of heavy residue pyrolysis: A systematic approach to the design of fouling mitigation strategies using chemical additives

244th National Meeting (2012)

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