Methanol-reforming reaction over copper-containing catalysts?The effects of anions and copper loading in the preparation of the catalysts by kneading method

摘要: Methanol-reforming reaction CH3OH + H2O = 3H2 CO2 was carried out over copper-containing catalysts which were prepared from hydroxides of copper or the hydroxide kneaded with various metal oxides. The specific activity (activity per weight used) either supported support-free catalyst markedly increased when alkali solution addition salt at higher pH percentage on support decreased. However, other kinetic parameters such as activation energy and selectivity unaffected by preparation unless chloride employed a starting material lower pH. DTA, ir, XPS, AES chemical analyses revealed that ion in precipitate exchanged part anionic group its during course preparation. anion fragment found to be strongly held surface inhibited great extent. On hand, decreased This highly active for title reaction. area metallic considerably support. gave rise increase catalyst. effect upon examined silica, manganese dioxide, ferric oxide, titanium calcium nickel oxide. supports than oxide exerted no Nickel suggested reduced thus formed catalyzed methanol decomposition CO 2H2.