Study On Dehydrogenation Of Formic Acid Under Palladium-based Catalyst

The Ag-Pd/NH₂-SBA-15 system and Au-Pd/NH₂ were obtained by impregnating Ag-Pd and Au-Pd with different proportions of NH₂-SBA-15 supported by different impregnation SBA-15 system of the two systems of the catalyst.In the Ag-Pd/NH₂-SBA-15 system,the catalytic activity of the catalyst is preferably Ag1Pd9/NH₂-SBA-15.At 323 K,the TOF of Ag1Pd9/NH₂-SBA-15 catalyst is as high as 964 h-1.In the Au-Pd/NH₂-SBA-15 system,the catalytic activity is best Au2Pd8/NH₂-SBA-15.At 323 K,the TOF of Au2Pd8/NH₂-SBA-15 catalyst is very high,reaching 1786 h-1,excellent catalytic effect.Two of the system catalyst after five cycles of use,the catalytic performance is still good.The catalytic performance of the catalyst is in accordance with the basic law of industrial catalysis,that is,the higher the catalytic activity of the catalyst as the temperature increases.The amount of sodium formate will have a great effect on the catalyst for the dehydrogenation of formic acid.The greater the concentration of sodium formate will improve the performance of the catalyst for formic acid dehydrogenation.The internal structures of the catalysts were analyzed and explored by means of XRD,TEM,XPS and GC.The catalysts of Ag-Pd/NH₂-SBA-15 and Au-Pd/NH₂-SBA-15 were all The formation of nanoparticle alloy structure,chemical stability,and Ag1Pd9/NH₂-SBA-15 and Au2Pd8/NH₂-SBA-15 dehydrogenation selectivity is100%.