Reactor cracking

The FCC reactor is really two reactors with sohd catalyst pellets cycled between them. The vaporized gas oil is fed along with fresh catalyst to the first, called the reactor, and the spent catalyst is separated from the products in a cyclone and sent to the regenerator, where air (now sometimes O2) is added to oxidize the carbon. The flows of reactants, products, air, and catalyst are indicated in Figure 2-13. The reactor cracks the hydrocarbon and forms coke on the catalyst Then in the regenerator the coke is burned off and the catalyst is sent back into the reactor. 

Hamburg University [6] developed a fluid-bed reactor cracking process. In the process, plastics are fed into the reactor by a screw and cracked. The cracked gases are preheated... 

The USS process [32] adopts a single reactor cracking system with stirrer. The upper part of the reactor acts as a catalytic reaction tower and the bottom part as the thermal cracking reactor. Although its structure is complicated, this process can reduce the total process flow path and thereby reduce the equipment and capital needed. The process can be applied in beating PE, PP and PS, but is not suitable for PVC pyrolysis. 

The first 50 mm OD quartz reactor with pyrex flow straightner was wrapped with electrical heater tape and installed behind a large water cooled shield. The shield had a 10 cm diameter circular hole located in it for admission of the solar flux into the reactor. Behind the reactor, a water cooled semi-circular (cross section) cylindrical backplate prevented radiation from entering the work area through the back of the reactor. Unfortunately, the first reactor cracked at the pyrex/quartz joint when the upper portion of the reactor was accidentaly heated to a temperature in excess of its 100°C design operating temperature. 

By means of these reactors, cracking occur under perfect oxygen free condition, and incineration also takes place under optimium condition. 

Microwave >500 MHz Food, organic synthesis reactors, cracking, pyrolysis (Metaxas et al, 1983)... 

Riser reactor Crack feed species to product species Plug-flow reactor (PFR) operating under pseudo-steady conditions... 

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