3way Catalyst

Figure 17-42 shows a catalytic converter unit used for stationary reciprocating engine applications. The steel catalyst housing frame can be used with either three-way or oxidation catalyst systems. The catalyst element shown on top of the housing can be quickly removed and replaced. Figure 17-43 is a schematic diagram indicating the converter and sensor location in the exhaust gas flue.

Figure 17-44 shows representative uncontrolled emissions for a standard 4-stroke-cycle rich-burn engine. At the crossover air-to-fuel ratio point, the emissions are around 10 g/hp-h (13 g/kWh) of both NOX and CO. Figure 16-45 is a Fig. 17-44 Representative Uncontrolled Emissions for Four Stroke-Cycle Rich-Burn general performance diagram for a three-way cata- Engine. Source: Miratech Corp. lyst system. Such a system will typically reduce NOx and CO emissions by 85 to 95% based on

OXIDATION CATALYST & SCR CATALYST

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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