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首页> 外文期刊>Fuel >Perylene supported metal free bronsted acid-functionalized porphyrin intertwined with benzimidazolium moiety for enhanced photocatalytic etherification of furfuryl alcohol
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Perylene supported metal free bronsted acid-functionalized porphyrin intertwined with benzimidazolium moiety for enhanced photocatalytic etherification of furfuryl alcohol

机译：Perylene支撑的金属无抗正囊官能化卟啉与苯并咪唑鎓部分交织在一起，用于增强糠醇的光催化醚化

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摘要

Metal free Bronsted acid-functionalized porphyrin, entangled with benzimidazolium moiety (MFBAFPBM) was synthesized and confirmed by various characterization techniques. The Hammett acidity (H-0 = 0.76) was determined and found appreciable proton levels in the catalyst. MFBAFPBM displayed effective heterogeneous photo-catalytic activity for sustainable etherification of furfuryl alcohol, with several alcohols using simulated yellow visible (5 W LED) light at ambient temperature. The low temperature route enhances selectivity by lowering the formation humin and other hydrolysis products. The higher catalytic presentation can be related to good Hammett acidity of the catalyst having suitable porphyrin chromophore with ionic benzimidazole moiety on perylene support. A study for optimizing the reaction parameters such as catalyst loading, duration and source of visible light and mole ratio of reactants (1:1.2 Furfuryl alcohol : ROH) has been performed and 20 mg catalyst exhibited the highest catalytic activity with 95% yield of furfuryl ethyl ether. A kinetic study showing the evidences for the progress of etherification of furfuryl alcohol was also confirmed by (HNMR)-H-1. MFBAFPBM evidenced as reusable photo-catalyst that could easily separated from the reaction mixture for next cycle nine times without loss of catalytic performances. Finally, blending of furfuryl-octyl ether with diesel (10, 20 and 30%) found to be much appreciable fuel properties than that of real diesel sample.
机译：用各种表征技术合成并证实了与苯并咪唑鎓部分（MFBAFPBM）缠结的无金属铜酸官能化卟啉。确定Hammett酸度（H-0 = 0.76），并在催化剂中发现了明显的质子水平。 MFBAFPBM显示了用于糠醇可持续醚化的有效的异质光催化活性，在环境温度下使用模拟的黄色可见（5W LED）光具有几种醇。低温途径通过降低形成疏水和其他水解产物来增强选择性。较高的催化剂呈现可以与具有合适的卟啉发色团的催化剂的良好恒生酸度有关，其中苯并苯并烷基苯并咪唑部分。已经进行了优化反应参数，例如反应物（1：1.2糠醇：ROH）的催化剂负载，持续时间和摩尔比的催化剂负载，持续时间和源源的研究和20mg催化剂具有95％糠基的最高催化活性乙醚。还通过（HNMR）-H-1证实了显示糠醇醚化进程的证据的动力学研究。 MFBAFPBM证明可重复使用的光催化剂，其可以容易地与反应混合物分离下一个循环九次，而不会损失催化性能。最后，将糠醛 - 辛基醚与柴油（10,20和30％）的混合，发现与真实柴油样品的燃料特性有关。

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