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Catalytic Coating for Reduced Coke Formation in Steam Cracking Reactors

Author:
Schietekat, Carl M., Sarris, Stamatis A., Reyniers, Pieter A., Kool, Lawrence B., Peng, Wenqing, Lucas, Patrick, Van Geem, Kevin M., Marin, Guy B.
Source:
Industrial & Engineering Chemistry Research 2015 v.54 no.39 pp. 9525-9535
ISSN:
1520-5045
Subject:
carbon, carbon dioxide, coatings, cracking, engineering, ethane, steam
Abstract:
A novel catalytic coating that converts coke to carbon oxides through a reaction with steam has been developed. Several coating formulations were tested in a jet-stirred reactor setup, and the best performing formulation was further evaluated in a pilot plant setup. Application of the coating during steam cracking of ethane at industrially relevant conditions resulted in a reduction of the asymptotic coking rate by 76%. The coating activity remained constant over several coking/decoking cycles. Coupled furnace-reactor run length simulations of an industrial ethane cracking unit were performed and resulted in an increase of the run length by a factor of 6. However, the simulated CO₂ yield is higher than the design value of a typical caustic tower.
Agid:
5383249