## Process Integration Using Block Superstructure

journal contribution

posted on 02.03.2018, 00:00 by Jianping Li, Salih Emre Demirel, M. M. Faruque HasanWe propose a general mathematical
model for various process integration
problems, involving mass integration, heat integration, simultaneous
mass and heat integration, and property integration. The process units,
including regenerators/interceptors, mixers, and splitters are represented
using blocks. The blocks are arranged in a two-dimensional grid, and
the arrangement of these blocks gives rise to various process integration
networks. The existence of connecting streams between adjacent blocks
and jump flows among all blocks enables the necessary interaction
between different blocks via material and energy flows. The size of
the block superstructure is determined by the number of layers with
mixing operations, process units, product streams, and heat integration
stages. The general process integration model is formulated as a mixed-integer
nonlinear optimization (MINLP) problem with the minimization of total
annual cost as the objective. We demonstrate our approach using four
case studies from the process integration literature.