Pressure-cycle reactor

False. Pressure cycle bioreactors do not give even distribution of nutrients. If air and nutrients are introduced at a single point then O2, CO2 and nutrient concentration, as well as hydrostatic pressure, change in a cyclic manner as the medium flows around the reactor. 

KINPTR simulations of commercial reforming (Table XVIII) will be used in this section to demonstrate process sensitivity. In the base case, a full-range Mid-Continent naphtha (55 wt. % paraffins) is reformed to a constant octane of 90 R + 0 over the entire cycle. With a reactor pressure of 1695 kPa and a 7.2 H2 recycle ratio, the start-of-cycle reactor inlet temperature to achieve target octane is predicted to be 759 K. The deactivation simulation shows that it would take about 1 year to reach the end-of-cycle temperature of about 798 K. The start-of-cycle C5+ yield for this case is 86 vol %. The model predicts that the yield would decline by 4.8 vol % over the cycle. 

Finally, a pressure-swing reactor would allow to automize the cycling of the reagents and to perform much more CSC cycles, creating a precursor with a thickness of /xm. 

The Pressurized Water Reactor (PWR) reload core optimization problem, though easily stated, is far from easily solved. The designer s task is to identify the arrangement of fresh and partially burnt fuel (fissile material) and burnable poisons (BPs) (control material) within the core which optimizes the performance of the reactor over that operating cycle (until it again requires refueling), while ensuring that various operational (safety) constraints are always satisfied. 

The relative consumptions ( ) of the individual units are given in Table 3 as well. The primary reformer (REFl) produced about 1/3 (32.6U ) of the total consumption whereas the high-pressure ammonia reactor contributes only 1. 3 though the complete pressure drop of the recirculating gas cycle has assumed to be localized in this reactor. The gas conditioning (SEP1 compare Fig. 2) has a considerable influence with about 11 . 

For the combined EDS-batch SCWO, a variety of technical issues must be addressed the choice of materials of construction, the method used to introduce oxidant into the vessel, the durability of seals, the stability of SCWO reactions in a large-diameter vessel, the methods used to heat the vessel, the possibility of scaling and corrosion under batch SCWO conditions (salts are proposed to be captured in apan placed in the vessel, but this has not yet been demonstrated), the method used to fabricate the vessel (e.g., single forging vs. welded sections), the impact of repeated explosions followed by thermal and pressure cycles on the integrity of the EDS vessel and SCWO reactor (e.g., crack propagation), the most appropriate method of cooldown and depressurization following munition destruction, and the disposition of process residuals. 

This reactor is intended for use on Mars. Unlike many other extraterrestrial environments. Mars has an atmosphere. Specifically the atmosphere is roughly 4-7 millibar of pressure and composed of 95% carbon dioxide, 2.7% nitrogen, 1.5% argon, 0.15% oxygen, and 0.15% water (Keifer, 1992). This presents a host of complications for materials choices in the reactor. The pressure vessel of the reactor will be exposed to this environment while at an elevated temperature. While this temperature is lower than what one would expect for a liquid metal or rankine cycle reactor, it is high enough to... 

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