Department of Biochemical Engineering, Beijing University of Chemical Technology, Beijing, China.
Biotechnol Adv. 2012 Jul-Aug;30(4):874-8. doi: 10.1016/j.biotechadv.2012.01.017. Epub 2012 Jan 28.
Multi-walled carbon nanotubes (MWNTs) were functionalized with pyrogallol and used in a composite with silica as a support for a Cu-Co based catalyst. The catalysts were characterized using X-ray diffraction, transmission electron microscopy, and H(2) temperature programmed reduction. The effects of pyrogallol and the weight ratio of silica to MWNTs on the performance of the catalyst were studied in a fixed bed reactor. The increase of the amount of MWNTs in the catalyst support was found to favor decreased methanol production and increased production of C2+ alcohols. Using pyrogallol in catalyst preparation was also found to increase the production of C2+ alcohols. It was concluded that pyrogallol improves the distribution and uniformity of metal particles on the support, decreases the size of metal particles and increasing the rate of catalytic reduction.
多壁碳纳米管 (MWNTs) 经没食子酸功能化后，与二氧化硅复合作为铜钴基催化剂的载体。采用 X 射线衍射、透射电子显微镜和 H 2 程序升温还原对催化剂进行了表征。在固定床反应器中研究了没食子酸和二氧化硅与 MWNTs 的重量比对催化剂性能的影响。研究发现，增加催化剂载体中 MWNTs 的量有利于减少甲醇的生成，增加 C2+醇的生成。在催化剂制备中使用没食子酸也被发现可以增加 C2+醇的生成。研究结论认为，没食子酸可以改善金属颗粒在载体上的分布和均匀性，减小金属颗粒的尺寸，提高催化还原的速率。
