FCC Naphtha Hydrotreating

Prime-G+®: 3 Complementary Pillars Toward Energy Efficiency

Several solutions within three pillars are envisaged to achieve energy efficiency objectives, depending on the specific features of existing units, the local context and project requirements: Catalyst and process optimization, equipment and digitalization.

Prime-G+®

Prime-G+® stems from Axens' extensive experience acquired in cracked naphtha HDS and selective hydrogenation of LPG and gasoline. Although the naphtha splitter may be optional depending on the required HDS severity, the association of a Prime-G+® selective hydrogenation unit (SHU) with a splitter for light naphtha desulfurization and sweetening ideally complements the selective HDS on the heavier fraction.

Within the preferred arrangement, the "Prime-G+® 1st Step" produces an olefin-rich light cracked naphtha (LCN) and the sulfur-rich heavy cracked naphtha (HCN) is sent to the selective HDS to maximize octane retention.

Prime-G+® offer is particularly flexible allowing different process configurations to best fit the gasoline pool requirement and also maximize refinery profitability.

The first step of Prime G+® technology feature is in offering excellent preparation for the feed of the light gasoline etherification (TAME / TAEE) unit. The TAME/TAEE process ideally complements Prime-G+® technology in compensating for the octane loss and regaining the octane barrels.

Prime-G+® and Polyfuel®

One other technology features of the Prime G+® is, being coupled with Axens’ Polyfuel® technology, to offer the possibility to turn Olefinic feedstock into high value Products. LPG and LCN Upgrading towardistillates while maintaining good quality gasoline.

Prime-G+® and GT-BTX® Plus

Axens and Sulzer-GTC have signed an alliance in order to offer a combined solution with the Prime-G+® and the GT-BTX® Plus technology to convert the FCC gasoline into high value products for the gasoline and the petrochemical segments.

The combination of Prime-G+® and GT-BTX PluS® offers a unique solution to reduce octane loss to a very low level for the gasoline pool. On the other hand, it provides refiners the option of converting FCC gasoline into petrochemical products – BTX and additional propylene.

OATS™

OATS™ is a simple fixed bed process operating under mild conditions without hydrogen and using a low cost resin TA 801 catalyst. The OATSTM process can be designed to ensure a continuous operation between two FCC turnarounds.

This process has been proved in industry and offers major advantages over competing technologies such as higher octane retention and lower RVP of the gasoline product with no need for hydrogen and low cost metallurgy equipment allowing the retrofitting of idle isomerization or etherification plants.

The main types of reaction take place over TA 801 catalyst used in the process:

• Sulfur Shift Reactions
• Olefins Shift Reactions
• Desulfurization Mode
• Oligomerization Mode

Furnaces

Furnace(s) is a key equipment considering the need for optimal operation of unit. Thanks to an extensive design experience with feedbacks from operators and a complete knowledge of this process, Heurtey Petrochem Solutions provides an unparalleled service such as these following features:

• High fuel efficiency (94%+) depending on fuel S level
• Fully Modularized
• Lowest Emission (95%+ reduction with emission reduction technology)
• Optimized Plot Plan