09-18-2009 04:08 PM
I can only assume that your comment about SCR is intended for diesel engines. Caterpillar will most definately have G3500 and G3600 lean burn gas engines available that will meet the 2010 NSPS standards without SCR aftertreatment. On the smaller products (G3300 and G3400) stoichiometric engines with 3-way catalysts will be available. The 2010 NSPS standards are no stricter on NOx than the current regulations in Europe, where Caterpillar has a large gas engine presence. There are gas engine applications that call for SCR, but these are local standards that are stricter than the EPA NSPS standards.
07-14-2009 07:23 AM
That's correct. Manufacture must certify the machine to meet the standard if effect at the the date it comes off the production line. Here's a link to Cat's Tier 4 white paper that includes a table with engine sizes and EPA tier data.
Tier 4 is going to be the real kicker! Unless you want to take a operateing hour restriction on your permit you'll have to install SCR to meet the EPA limits. That will add roughly $100K per MW to capitol cost and @ $1.25 per MWH to O&M........Not sure about the little engines or transportation side I only have 3516's and bigger....
07-10-2009 04:29 PM
12-19-2008 10:01 AM