posted on 2015-10-07, 00:00authored byCarl M. Schietekat, Stamatis
A. Sarris, Pieter A. Reyniers, Lawrence B. Kool, Wenqing Peng, Patrick Lucas, Kevin M. Van Geem, Guy B. Marin
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.