(513c) Pretreatment Effect on Palladium Catalyst for Direct Synthesis of Hydrogen Peroxide

Hydrogen peroxide is one of the most environmentally friendly oxidizing agents that can be used industrially since it generates only water after acting as an oxidizing agent. To produce hydrogen peroxide with this industrial value, a process called an ‘Auto-Oxidation(AO)” has already been commercialized, but there are environmental and cost problems. Therefore, a direct synthesis process capable of producing hydrogen peroxide from hydrogen and oxygen, which can replace the AO process, has been actively researched worldwide.

This direct synthesis process is currently having difficulty in commercialization due to the low purity of product peroxide compared to the existing AO process. So to improve this, many methods have been found to increase the selectivity of hydrogen peroxide by changing the type of catalyst or reaction conditions. Among them, a method of increasing the selectivity of the reaction using a halogen species has been known earlier. Since the conventional method uses halogen as a additive to the reaction medium, which has problems in re-usability and separation process, so there was difficulty in commercialization.

However, the method of using halogen species is cheaper than other selectivity enhancement methods, and the manufacturing process is simple, so it shows strength in mass production. It was intended to develop a catalyst having high activity and stability by using halogen in a manner other than that used in the form of the above-mentioned additives. Therefore, in this study, a catalyst having high activity was developed by applying various treatments to a catalyst synthesized using a metal precursor containing halogen, and various characterization analyses were conducted.