Exhaust gases treatment design

The Institut fur Chemische Verfahrenstechnik at Stuttgart University has reported at length on the topic of process design and intensification - in particular as they impact on several examples of chemical reaction engineering (Eigenberger et al., 2007). A number of processes were examined, ranging from steam reformers to diesel exhaust gas treatment (an interesting non-chemical plant application of PI which readers of the paper may find valuable). 

In the wake of the spectacular application of monoliths in the treatment of automobile exhaust gas, the potential of monoliths in other applications was studied. Gas-phase reactions were the major area. Catalytic oxidation has received a lot of attention. Low-NOA. burners based on monoliths were designed, catalytic oxidation of VOCs also benefits from structured catalysts, basically because of the low pressure drop and the resistance against dust. 

G. Montenegro and A. Onorati. Id thermo-fluid dynamic modelling of de-nox scr systems for diesel engine exhaust gas after-treatment Int. J. of Vehicle Design, 41(No.l/2/3/4) 285-306, 2006. 

The Portable Unit was designed to demonstrate the performance of the Shirco Infrared Incinerator in many thermal treatment applications. The construction details and process functions of the trailer-mounted incinerator are identical to a full-scale infrared incinerator. The system consists of a feed preparation system, an infrared primary chamber, a gas-fired secondary chamber, a wet gas scrubber, an exhaust system, heating element power centers (HEPC), and data acquisition and control systems. All equipment is enclosed within a 45-foot trailer. A schematic representation of the Portable Unit is shown in Figure 1. 

In the compression zone, as a result of the specific design of the screw(s) in this part of the equipment, the void volume between the particles is reduced as particles are forced to approach each other more closely and gas (in most cases wet air) is expelled from the loose mass (see also Sections 8.1 and 8.2). As shown in Fig. 8.25, some extruders have vents, which may be open or connected to a vacuum and exhaust treatment, to remove the displaced gas. 

---