The goal of ethylene oxide catalysis is to maximize the primary reaction (K1) while minimizing or eliminating the competing and consecutive reactions, K2 and K3. Shell Catalysts & Technologies has been reinventing ethylene oxide catalyst possibilities for more than 40 years, constantly and consistently improving their performance.
The scientists at Shell Catalysts & Technologies were not content with a HY catalyst that was a “better” HA catalyst. They have continued to work on improving HY catalysts to compete with the best performance of HS catalysts. We stand by our fourth catalyst family, the High Performance (HP) family of Ethylene Oxide catalysts.
The most important measure of ethylene oxide catalyst performance is selectivity-defined as the molar yield of ethylene oxide produced per molar quantity of ethylene reacted. Another important parameter is activity, the catalyst temperature required to achieve the desired EO production level. Shell Catalysts & Technologies’ scientists have focused on improving not only the initial selectivity performance of our ethylene oxide catalysts but also the average catalyst selectivity throughout life.