PETR 25 |
| It has been 30 years since the use of Pt-metal containing CO combustion promoters were introduced to catalytic cracking processes. In 1972, the concept that economically small amounts of Pt, 1-10 ppm, might have sufficient activity for complete CO combustion was tested with excellent results. Testing of other noble metals showed that all had activity, but Pt, Pd and Ir seemed the best.. The first actual commercial demonstration was done in a TCC unit in 1974. Commercial use in FCCs began in 1975 in units with proper metallurgy. A test in a Mobil refinery demonstrated both partial and complete combustion and the increased yields that result from the lower catalyst circulation rates and higher temperatures. By 1979, the preferred method was the use of additives containing concentrates of Pt on a support, usually alumina. Subsequent developments, such as the higher NOx levels associated with Pt, will also be discussed. |
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7th International Symposium on Advances in Fluid Cracking Catalysts (FCCs)
1:30 PM-5:00 PM, Sunday, 10 September 2006 Palace -- Telegraph Hill, Oral
Division of Petroleum Chemistry |