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Extrusion formed ceramic honeycomb for De-NOx via selective catalytic reduction (SCR) was developed using the powder containing mainly TiO₂, Al₂O₃ and V₂O5. The plasticity of dough and the catalytic activity of honeycomb were evaluated as function of various forming additives. The optimum organic contents of water, MC and PEG for this system were 40, 3.5 and 3.5 part, respectively, with respect to the weight of starting powder. An extruded honeycomb was dried in the chamber controllable humidity and temperature. The stepwise drying process with the drying time longer than 10 days was developed to prevent any cracking. One inch honeycomb with cell density of 35cpsi was successfully dried prior to firing. The product showed a nearly 98% catalytic activity in a wide temperature range from 250℃ to 450℃ and significant strength. The processing developed in this study can be applied in manufacturing the SCR catalyst support for both stationary and moving NOx sources such as marine engine.

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Abstract

1.서론

2.촉매 성형공정 개발

3.결과 및 고찰

4.결론

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UCI(KEPA) : I410-ECN-0101-2009-559-014135796