Improved FCC yields through a combination of catalyst and process technology advances

Conference · Sat Jan 01 04:00:00 EST 1994

OSTI ID:7078271

McLean, J B; Bovo, E B ^[1]

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1. Engelhard Corp., Houston, TX (United States)

Dramatic yield improvements have been demonstrated using the latest FCC process technology advances. These include improvements in feed dispersion, stripper and regenerator design, and riser termination for short contact time cracking. Riser termination designs in particular have received much attention, for both new units as well as revamps. Effective systems have been developed to rapidly separate catalyst from hydrocarbon vapors, reducing non-selective post-riser cracking. Improved selectivities result, reducing coke and dry gas formation and allowing unit operation at higher severity. Proper catalyst selection is essential to realize the maximum potential benefit from these hardware improvements. This paper discusses the types of yield changes which can be expected in a revamp scenario incorporating the latest riser termination designs, particularly when catalyst change effects are included. Both fresh catalyst properties and catalyst management policy are important variables. Process model studies for several hypothetical operating cases are presented, including the use of a high activity catalyst for maximum conversion or throughput, a high matrix catalyst for reducing slurry yield, a metals tolerant catalyst for processing resid feed, and a high olefin selectivity catalyst for a reformulated gasoline scenario. In all cases, improved yields are achieved when incorporating catalyst change effects which may not have been possible without the advanced hardware due to unit constraints. Commercial data from several operating units which have implemented these systems is presented which also highlights the interaction between process and catalyst improvements.

• OSTI ID: 7078271
• Report Number(s): CONF-9403125--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONTROL
CRACKING
DATA
DECOMPOSITION
DESIGN
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
MATHEMATICAL MODELS
NUMERICAL DATA
OPTIMIZATION
PETROLEUM
PROCESS CONTROL
PYROLYSIS
THERMOCHEMICAL PROCESSES
YIELDS