Aromizing
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STATE-OF-THE-ART TECHNOLOGY Aromizing is Axens' continuous catalyst regeneration (CCR) reforming process expressly designed for aromatics production. It is the petrochemical complement to Axens' continuous catalyst regeneration (CCR) reforming process, Octanizing™, well acclaimed in the refining sector. This state-of-the-art technology employs an advanced catalyst formulation affording the highest BTX aromatics yield available. IMPROVED CATALYST The AR 501 catalyst has been improved to respond to the ultra-high severity and low pressure conditions required for the highest aromatics yield. This superior catalyst features outstanding aromatics selectivity due to uniform- and ultra- dispersion of active metals on the carrier. This translates to higher aromatics yields compared to competing catalysts. The more solid carrier material provides even better mechanical resistance and lower catalyst consumption rates than its predecessors. Moreover, the improved hydrothermal stability of this carrier and its superior chloride retention impart an extended catalyst life. KEY PROCESS FEATURES The Aromizing technology for the production of aromatics from naphtha offers unrivaled product yields, low investment and operating costs and an exceptional on-stream factor. This technology exhibits the following key features: Side-by-Side Reactor Arrangement • Easy construction and maintenance access • Minimal thermal expansion • Short transfer lines to heaters • No height constraints on reactor design • Less than 1% non-flowing heel catalyst • Savings in investment, and construction costs Continuous Catalyst Regeneration (CCR) • Smooth operating non pulsing lift system • Fully automated; no operator attention • Low catalyst attrition • Easy maintenance Advanced Regenerator: Regen-C TM • Two distinct burning zones for complete coke burn-off with minimum dechlorination • Proprietary "Dry Burn Loop" for substantially reduced catalyst aging • Optimized oxychlorination parameters with lower chloride consumption • Reduced corrosion potential due to system dryness • Low annual catalyst cost Optimum Operating Conditions • Very low pressure operation: average is below 3.5 barg (50 psig) • Ultra high severity (i.e., over 104 RON) • Low recycle H 2 /HC ratio resulting in low power consumption and enhanced yield • Optimized heat recovery for low thermal energy consumption Cost Effective Hydrogen Recovery • Efficient and simple recontacting system for high purity hydrogen recovery • Low investment cost and limited utilities consumption. PROCESS FLOW SCHEME In the Aromizing process (see above) an optimized heart-cut naphtha feed is mixed with recycle hydrogen, preheated and passes through a series of adiabatic reactors and heaters where it is converted to aromatics and hydrogen. The effluent is cooled by heat exchange and liquid product is separated from Aromizing™ CCR REFORMING FOR AROMATICS PRODUCTION
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Aromizing
Transcript of Aromizing
STATE-OF-THE-ART TECHNOLOGY
Aromizing is Axens' continuous catalyst regeneration (CCR) reforming process expressly designed for aromatics production. It is the petrochemical complement to Axens' continuous catalyst regeneration (CCR) reforming process, Octanizing™, well acclaimed in the refining sector. This state-of-the-art technology employs an advanced catalyst formulation affording the highest BTX aromatics yield available.
IMPROVED CATALYST
The AR 501 catalyst has been improved to respond to the ultra-high severity and low pressure conditions required for the highest aromatics yield. This superior catalyst features outstanding aromatics selectivity due to uniform- and ultra- dispersion of active metals on the carrier. This translates to higher aromatics yields compared to competing catalysts. The more solid carrier material provides even better mechanical resistance and lower catalyst consumption rates than its predecessors. Moreover, the improved hydrothermal stability of this carrier and its superior chloride retention impart an extended catalyst life.
KEY PROCESS FEATURES
The Aromizing technology for the production of aromatics from naphtha offers unrivaled product yields, low investment and operating costs and an exceptional on-stream factor. This technology exhibits the following key features: Side-by-Side Reactor Arrangement • Easy construction and maintenance access • Minimal thermal expansion • Short transfer lines to heaters • No height constraints on reactor design
• Less than 1% non-flowing heel catalyst • Savings in investment, and construction costs Continuous Catalyst Regeneration (CCR) • Smooth operating non pulsing lift system • Fully automated; no operator attention • Low catalyst attrition • Easy maintenance Advanced Regenerator: Regen-CTM • Two distinct burning zones for complete coke burn-off with minimum dechlorination • Proprietary "Dry Burn Loop" for substantially reduced catalyst aging • Optimized oxychlorination parameters with lower chloride consumption • Reduced corrosion potential due to system dryness • Low annual catalyst cost Optimum Operating Conditions • Very low pressure operation: average is below 3.5 barg (50 psig) • Ultra high severity (i.e., over 104 RON) • Low recycle H2/HC ratio resulting in low power consumption and enhanced yield • Optimized heat recovery for low thermal energy consumption Cost Effective Hydrogen Recovery • Efficient and simple recontacting system for high purity hydrogen recovery • Low investment cost and limited utilities consumption.
PROCESS FLOW SCHEME
In the Aromizing process (see above) an optimized heart-cut naphtha feed is mixed with recycle hydrogen, preheated and passes through a series of adiabatic reactors and heaters where it is converted to aromatics and hydrogen. The effluent is cooled by heat exchange and liquid product is separated from
Aromizing™ CCR REFORMING FOR AROMATICS PRODUCTION
recycle and hydrogen gases. The hydrogen gas is compressed and recontacted with a pumped liquid stream in the recovery system. A high purity hydrogen product gas and an aromatics-rich liquid are produced. The liquid is stabilized to remove light ends while the bottoms (Aromizate) are sent to aromatics recovery in an appropriate ParamaX® suite.
EXTENSIVE EXPERIENCE
The Axens IFP Energies nouvelles group technology has been involved in catalytic reforming since 1964 when the first semi-regenerative reforming unit was licensed. Continued development then led to the commercialization of the CCR technologies: Octanizing designed for gasoline and Aromizing for aromatics production.
Continuous regenerative reforming processes such as Octanizing and Aromizing are the "workhorses" for Axens' refining and petrochemical sectors respectively. Over 50 combined licenses awarded to-date attest to the long track record of successful performance of both processes.
AROMIZING: THE PERFECT STARTING BLOCK FOR PARAMAX
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Regen.Loop
Feed
RecoverySystem
Reactors and Heaters RegeneratorBooster
Compressor Hydrogen-RichGas
Separator
RecycleCompressor
Aromizate toStabilization
