Glycerol oxidation was investigated using as catalyst an acid zeolite (H-ZSM-5) impregnated with different contents of Pt (1 and 3 wt%), and H₂O₂ and air as oxidants. Catalysts were characterized by XRD, XRF, FT-IR, ²⁷Al MAS NMR, N₂ adsorption, NH₃-TPD, XPS and TEM. After calcination, catalysts were reduced at 1000 °C under H₂ and this treatment lead to some dealumination that influenced catalyst acidity. The influence of acidity was evaluated in glycerol oxidation. All tested catalysts were able to oxidize glycerol, and the main products were 1,3-dihydroxyacetone, glyceric acid and glyceraldehyde.

中文翻译：

---

高温还原Pt / HZSM-5脱铝对甘油氧化的影响

使用浸渍了不同含量的Pt（1和3 wt％），H ₂ O ₂和空气作为氧化剂的酸性沸石（H-ZSM-5）作为催化剂，研究了甘油的氧化。通过XRD，XRF，FT-IR，²⁷ Al MAS NMR，N ₂吸附，NH ₃ -TPD，XPS和TEM对催化剂进行了表征。煅烧后，催化剂在H ₂下于1000°C还原，这种处理导致一些脱铝反应，影响了催化剂的酸度。在甘油氧化中评估了酸度的影响。所有测试的催化剂均能够氧化甘油，主要产物为1,3-二羟基丙酮，甘油酸和甘油醛。