Material selection for multi-tubular fixed bed reactor Fischer-Tropsch reactor

Abstract

Multi-tubular, fixed bed, Fischer-Tropsch reactor (MFBR) appears as an essential technology for the energy future; moreover it is required to improve and to reduce operation costs. This research used multi-criteria decision making methods (MCDM) for the material selection of a MFBR. It focused on fulfilling the technological requirements for constructing the vessel and piping of a MFBR, while costs reduction is considered as part of the analysis. The MCMD methods are complex proportional assessments of alternatives which apply methods such as grey relations (COPRAS-G), operational competitiveness rating analysis (OCRA), a new additive ratio assessment (ARAS) and technique for order of preference by similarity to ideal solution (TOPSIS). The criteria weighting was performed by compromised weighting method composed of analytic hierarchy process (AHP) and entropy methods. The ranking results showed that ASME SA-106 and ASME SA-106 29 would be the best materials for the vessel and piping of a MFBR.