Steam-cracking: an evergreen of the chemical process industry
Event details
| Date | 15.11.2013 |
| Hour | 10:15 |
| Speaker | Guy B. Marin |
| Location | |
| Category | Conferences - Seminars |
My lecture will focus on the thermal conversion of fossil or renewable feedstocks to olefins.
Steam cracking can be described by considering a limited number of elementary reaction families not only for fossil but also for renewable feedstocks. Group contribution methods can be applied to calculate the corresponding kinetic parameters. The group contributions follow from a data base obtained by high level ab initio calculations involving representative molecules and reactions. Based on this single-event microkinetic (SEMK) methodology a reasonable agreement with pilot and industrial data was obtained for ethane steam cracking.
SEMK requires the characterization of a feed stock in terms of types of molecules. Both fossil or renewable feedstocks typically consist of a considerable amount of types of molecules. The available information is limited to commercial indices corresponding to. So-called molecular reconstruction methods use macroscopic properties such as density and boiling point traject to obtain a characterization of the feedstock in the terms required. Of course they are based on a training set. The latter can be obtained by a GCxGC analysis of typical feeds.
Process optimization and innovation not only involves feed stocks and reactor technology but should also account for up- or downstream units like the Transfer Line Exchanger (TLE), the convection section and the interaction between the furnace and the reactor coils. These aspects are discussed in the last part of my lecture.My lecture will focus on the thermal conversion of fossil or renewable feedstocks to olefins.
Process optimization and innovation not only involves feed stocks and reactor technology but should also account for up- or downstream units like the Transfer Line Exchanger (TLE), the convection section and the interaction between the furnace and the reactor coils. These aspects are discussed in the last part of my lecture.
Steam cracking can be described by considering a limited number of elementary reaction families not only for fossil but also for renewable feedstocks. Group contribution methods can be applied to calculate the corresponding kinetic parameters. The group contributions follow from a data base obtained by high level ab initio calculations involving representative molecules and reactions. Based on this single-event microkinetic (SEMK) methodology a reasonable agreement with pilot and industrial data was obtained for ethane steam cracking.
SEMK requires the characterization of a feed stock in terms of types of molecules. Both fossil or renewable feedstocks typically consist of a considerable amount of types of molecules. The available information is limited to commercial indices corresponding to. So-called molecular reconstruction methods use macroscopic properties such as density and boiling point traject to obtain a characterization of the feedstock in the terms required. Of course they are based on a training set. The latter can be obtained by a GCxGC analysis of typical feeds.
Process optimization and innovation not only involves feed stocks and reactor technology but should also account for up- or downstream units like the Transfer Line Exchanger (TLE), the convection section and the interaction between the furnace and the reactor coils. These aspects are discussed in the last part of my lecture.My lecture will focus on the thermal conversion of fossil or renewable feedstocks to olefins.
Process optimization and innovation not only involves feed stocks and reactor technology but should also account for up- or downstream units like the Transfer Line Exchanger (TLE), the convection section and the interaction between the furnace and the reactor coils. These aspects are discussed in the last part of my lecture.
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