CCR units

Description The process consists of a reactor section, continuous catalyst regeneration (CCR) unit and product-recovery section. Stacked radial-flow reactors (1) are used to facilitate catalyst transfer to and from the CCR catalyst regeneration section (2). A charge heater and interheaters (3) are used to achieve optimum conversion and selectivity for endothermic reaction. Reactor effluent is separated... 

The total capacity of the semiregenerative units exceeded 5.0 million b/d while CCR units reached 3.8 million b/d. The simultaneous use of CCR technology and bimetallic catalysts has given UOP a unique position in the field of catalytic reformer process licensing. Recent catalyst formulations have improved both aromatic and reformate yields. UOP has improved the performance of the conventional platforming process by incorporating a CCR system. The process uses stacked radial-flow reactors and a CCR section to... 

Table 4 Typical yields of UOP semiregenerative and CCR units for a Middle East naphtha feed...

CCR UNIT NO. 2. CCR2-SOP-37 Revision 2 TITLE Transferring XYZ from storage Tanks To Blenders... 

Operating Conditions. Table 6 shows the relative operating severities for the SR and CCR Platforming units. The CCR Platforming vmit operates at higher severity and lower reactor catalyst inventory. In addition, the CCR unit runs continuously compared to 12 month SR Platforming cycle lengths. 

A second failure case in a CCR unit has been reported recently [17]. It happened in a plant where the furnace had been operated without failure for 24 years. Some changes had preceded the failure ... 

Figure 5.39 The Chart CCR unit located between two flanges (photograph courtesy of Chart Energy and Chemicals).

Antwerp, Belgium, Continuous Catalytic Reforming (CCR) Unit, Refinery, Steam Explosion... 

Catalytic reformer 0.10 to 0.20 Higher feed rate Maximum coke on catalyst (CCR units) Reduced product quality giveaway Increased energy efficiency... 

In a CCR unit Figure 19 the hydrotreated feed mixes with recycle hydrogen and goes to series of adiabatic, radial-flow reactors arranged in a vertical stack. Catalyst flows down the stack, while the reaction fluids flow radially across the annular catalyst beds. The predominant reforming reactions are endothermic, so heaters are used between reactors to reheat the charge to reaction temperature. Flue gas from the fired heaters is typically used to generate steam. 

Catalyst is regenerated in the continuous catalytic reduction process using the same basic procedures. About 200 lb h were reduced in the first CCR units in 1971 compared with 4000 lb h in modem plants. These quantities are equivalent to regenerating the whole charge of caMyst in the reformer—a total of 12 and 150 times a year, respectively. 

Workshop 5.1 Guide for Modeling CCR Units in Aspen HYSYS Petroleum Refining... 

In Figure 5.59, we enter the Catalyst section of Operation Tab. We must enter an estimate for the catalyst circulate rate since we are modeling a CCR unit Users will note that it is possible to enter other specifications in the Catalyst Section, however, only the circulahon rate ensures robust convergence. 

In this chapter, we have developed an integrated model for an UOP CCR unit in Aspen HYSYS Petroleum Refining. We use detailed feed composition (PNA content) and the routinely collected data such as operating profiles of reactor, product yields and fractionator temperature profiles. The key highlights of this chapter are ... 

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