Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China.
Carbohydr Res. 2011 Mar 1;346(4):480-7. doi: 10.1016/j.carres.2011.01.001. Epub 2011 Jan 7.
Al-promoted SO₄ ²⁻-/ZrO₂SBA-15 catalysts were prepared and characterized by XRD, BET, ICP and NH₃-TPD techniques. The influence of introducing aluminum on the structure and surface properties of the catalyst and the catalytic activity for dehydration of xylose to furfural has been investigated. The introduction of the Al stabilizes the tetragonal phase of the ZrO₂ and thus increases the number and intensity of acid sites. Based on the characterization of the deactivated catalyst, the accumulation of byproducts is the main reason for the deactivation of the catalyst. Regeneration with H₂O₂ can completely recover the catalytic activity of the deactivated catalyst.
Al-promoted SO₄ ²⁻-/ZrO₂SBA-15 催化剂采用 XRD、BET、ICP 和 NH₃-TPD 技术进行了制备和表征。考察了引入铝对催化剂结构和表面性质以及对木糖脱水制备糠醛催化活性的影响。铝的引入稳定了 ZrO₂的四方相，从而增加了酸位的数量和强度。基于失活催化剂的表征，副产物的积累是催化剂失活的主要原因。用 H₂O₂再生可以完全恢复失活催化剂的催化活性。
