oa South African Journal of Chemical Engineering - Modelling of purifiers for multi-period operation in refinery hydrogen networks : a survey
Refinery processes undergo periodic changes of operating conditions in response to changes in the composition of process streams, and to satisfy product specifications while compensating for the loss of catalyst activity. Multi-period hydrogen management approach may be employed to account for changing operating conditions of refinery processes in the design of refinery hydrogen networks at a conceptual level (Ahmad et al. 2010). In this work the short-cut models of Liu and Zhang (2004), of purification processes employed in refineries for recovery of hydrogen, are modified to account for the changing operating conditions of a hydrogen network. Results indicate reduced total annualised costs compared to previous design optimisation methodologies.
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