FGD and DeNOx
NEWSLETTER       

                                                                                                           May 2003
                                                                                                             No. 301

High Temperature Catalyst for Simple Cycle Units

Howard Franklin of Hitachi America, Ltd. discussed Babcock Hitachi’s high temperature catalyst for SCR in simple cycle gas turbine plants at Power-Gen 2002. This catalyst has sufficient activity packed into a relatively small volume allowing for compact, low pressure drop designs. It has considerable experience with proven durability at high temperatures, to 1100° F and is only temperature limited by the increase in ammonia oxidation rates with increasing operating temperature. 

The catalyst has a corrugated shape that packs a large surface into a relatively small volume and minimizes the catalyst’s thermal sensitivity and thermal expansion. A ceramic substrate is used for the base with a mixture of titanium oxide, tungsten oxide and secondary additive as the active catalyst. Performance was satisfactory for over 20,000 operating hours.  

Back to FGD and DeNOx Newsletter No. 301  Table of Contents