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Scott discussed the beneficial effects of SCR on mercury speciation as an integral part of many utilities' mercury control strategies.
Revision Date: 11/29/2012
Tags: 221112 - Fossil Fuel 化石燃料, W. S. Hinton & Associates, Catalyst, SCR, Mercury, NOx
Catalyst Selection for NOx and Other Gases - Webinar - Hot Topic Hour November 29, 2012
NOx control, impacts on mercury removal, and SO2 oxidation. Selection of an SCR catalyst.
Revision Date: 11/29/2012
Tags: 221112 - Fossil Fuel 化石燃料, Hitachi Power Systems America, CoaLogix, Niksa Energy Associates, W. S. Hinton & Associates, SCR, Catalyst Regeneration, Catalyst, Mercury, NOx, Catalyst Maintenance
Advances in catalyst design will help address various pollution control issues but will also increase the number of parameters which must be evaluated during catalyst specification and selection. Plants are switching to high sulfur coals thus increasing SO3. Mercury control requires new catalyst design. The catalyst regeneration option offers potential cost savings but adds another performance variable.
Revision Date: 10/22/2010
Tags: 221112 - Fossil Fuel 化石燃料, W. S. Hinton & Associates, Catalyst
Catalyst Selection for Coal-fired Power Plants Webinar - Hot Topic October 21, 2010
Experts representing consulting, catalyst, regeneration, and systems companies provided an indepth analysis of the latest trends in catalyst use in coal-fired power plants. The dominant theme was that the SCR is no longer just a NOx removal device but is a multi-pollutant control device. Various alternatives for increasing performance and decreasing cost were proposed. Some involved maintenance of the existing catalyst while others emphasized better designs which last longer without maintenance and can thereby minimize or eliminate the maintenance. There was also discussion on how the various designs compare. The claim was made that hydraulic diameter was a better measure than pitch. There was agreement that it would be desirable to define various terms relative to maintenance of catalysts. The consensus seemed to be as follows: CATALYST Management 1. Maintenance a. Cleaning b. Rejuvenation c. Regeneration 2. Replacement Cleaning Catalyst: a dry process such as vacuum or mechanical removal of accumulations Rejuvenation Catalyst: wet chemical removal of accumulations Regeneration Catalyst: wet chemical removal plus re-impregnation of catalytic compounds Physical characteristics 1. Geometry a. Catalyst shape 1. Honeycomb 2. Corrugated 3. Plate b. Openings 1. Pitch 2. Hydraulic diameter Hydraulic diameter: The hydraulic diameter, DH, is a commonly used term when handling flow in noncircular tubes and channels. Using this term one can calculate many things in the same way as for a round tube. Definition: DH =4A P where A is the cross sectional area and P is the wetted perimeter of the cross-section. Reference http://en.wikipedia.org/wiki/Hydraulic_diameter McIlvaine solicits the input from subscribers as to the appropriate nature of this classification.
Revision Date: 10/22/2010
Tags: 221112 - Fossil Fuel 化石燃料, W. S. Hinton & Associates, Cormetech, Hitachi Power Systems America, CoaLogix, Catalyst, Cleaning, Regeneration