...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Reaction kinetics,mechanisms and catalysis >Synthesis 5-hydroxymethylfurfural (5-HMF) from fructose over cetyl trimethylammonium bromide-directed mesoporous alumina catalyst: effect of cetyl trimethylammonium bromide amount and calcination temperature
【24h】

Synthesis 5-hydroxymethylfurfural (5-HMF) from fructose over cetyl trimethylammonium bromide-directed mesoporous alumina catalyst: effect of cetyl trimethylammonium bromide amount and calcination temperature

机译：从果糖中合成5-羟甲基糠醛（5-HMF）通过十六烷基三甲基溴化溴化铵的介孔氧化铝催化剂：十六烷基三甲基溴化铵量和煅烧温度的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, mesoporous alumina was synthesized using aluminium isopropoxide as Al precursor and cationic surfactant cetyl trimethylammonium bromide (CTAB) as structure directing agent and it was tested in the dehydration reaction of fructose into 5-HMF. The experiments were carried out in a microwave reactor at 200 degrees C for 5 min. The various ratio of CTAB/Al2O3 and calcination temperature between 400 and 700 degrees C were selected as synthesis parameters. The synthesized samples were analyzed by BET and XRD. The highest surface area was obtained as 602.22 m(2)/g with the weight ratio of CTAB to Al2O3 of 1.00 at the calcination temperature of 400 degrees C. When calcination temperature increased from 400 to 700 degrees C, surface area decreased into 286.14 m(2)/g. N-2 adsorption/desorption isotherms of samples showed characteristic mesoporous type IV according to IUPAC classification. According to XRD patterns, all catalysts were in the amorphous structure. The maximum 5-HMF yield of 51% was achieved with the alumina catalyst calcined at 400 degrees C and CTAB/Al2O3 ratio of 1.0. Although the surface area decreased by rising the calcination temperature from 400 to 550 degrees C, the fructose conversion reached the highest value (97.54%).
机译：在该研究中，使用铝异丙醇氧化物作为Al前体和阳离子表面活性剂十三甲基溴化甲基溴化物（CTAB）合成了介孔氧化铝作为结构引导剂，并在果糖的脱水反应中测试成5-HMF。将实验在微波反应器中以200℃进行5分钟进行。选择CTAB / Al 2 O 3和400-700℃之间的煅烧温度的各种比例作为合成参数。通过BET和XRD分析合成的样品。获得最高表面积为602.22μm（2）/ g，Ctab的重量比在400℃的煅烧温度下为1.00的Al 2 O 3。当煅烧温度从400升高到700℃时，表面积降至286.14米（2）/ g。根据IUPAC分类，样品的N-2吸附/解吸等温度显示特征介孔型IV。根据XRD图案，所有催化剂都在非晶结构中。用氧化铝催化剂在400℃和CTAB / Al 2 O 3的比例为1.0的氧化铝催化剂，实现了51％的最大51mM产率。尽管表面积通过将煅烧温度从400℃上升至400至550℃而降低，但果糖转化率达到最高值（97.54％）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号