from first principles PP-I-1

PP-III-53Mechanism of Мethanol Steam Reforming over Cu-Containing Catalystin a High Excess of WaterKorchak V.N. 1 , Bychkov V.Yu. 1 , Falkevich G.S. 2 , Shchankina V.G. 3 , Sharkina V.I. 31 Semenov Institute of Chemical Physics RAS, Moscow, Russia2 Ltd. SAPR-NEFTECHIM, Moscow, Russia3 Ltd. NIAP-Katalizator, Novomoskovsk, Russiavesat@yandex.ruPurification of water waists from methanol and other oxygenates is of practical interest,especially, in hydrocarbons, ammonia and methanol production industries. Among existingtechnologies of water purification a catalytic conversion of methanol is more efficient, sincedoes need high investment and exploitation expenses. In the present work a mechanism ofmethanol steam reforming established basing one the results obtained over Cu-containingcatalyst tested in reaction mixture 5% methanol in water at temperature range 200-300oC andflow rate 1250/hr. It was found that catalyst before and after treatment in hydrogendemonstrated the same activity. Thus, suggested catalyst does not require any activationprocedure in hydrogen. Study of the catalyst oxidation state showed that under reactionconditions copper oxide almost completely reduced to metallic form. Carbon dioxide andwater were only desorption products by heating the catalyst in helium flow after switching offreaction mixture. Possible mechanism of methanol conversion in a high excess of water isdiscussed.207