Background: Liquid C8-C15 long-chain alkanes, as the main components of jet fuels or diesel, can be synthetized from abundant and renewable biomass derivatives by extending the carbon- chain length through cascade C-C coupling over acidic catalysts and hydrodeoxygenation over metal particles.

Objective: This research aims to develop a carbon-increasing catalytic process through the dimerization of 5-methylfurfuryl alcohol to produce the C11 oxygenate bis(5-methylfuran-2-yl) methane.

Methods: In this work, 5-methylfurfural, derivable from sugars, could be reduced to the expensive 5- methylfurfuryl alcohol over Cs2CO3 using an eco-friendly hydride polymethylhydrosiloxane. In the subsequent carbon-increasing process, a solid acidic nanocatalyst 3-chlorpyridine phosphotungstic acid (3-ClPYPW) was developed to be efficient for the conversion of 5-methylfurfuryl alcohol to bis(5-methylfuran-2-yl) methane under mild reaction conditions.

Results: A good bis(5-methylfuran-2-yl) methane yield of 51.6% was obtained using dichloromethane as a solvent at a low temperature of 70°C in 11 h. The solid nanocatalyst was able to be reused for at least four cycles without a remarkable loss of catalytic activity. The kinetic study proved that the reaction is a first-order reaction with apparent activation energy (Ea) of 41.10 kJ mol-1, while the thermodynamic study certified that the reaction is non-spontaneous and endothermic.

Conclusion: A novel catalytic pathway for the synthesis of BMFM (C11 oxygenate) by the one-pot process was successfully developed over solid acidic nanocatalysts 3-ClPYPW.

背景：液态C8-C15长链烷烃（作为喷气燃料或柴油的主要成分）可以通过丰富的可再生生物质衍生物合成，方法是在酸性催化剂上通过级联CC偶联延长碳链长度，并在金属颗粒上进行加氢脱氧。

目的：本研究旨在通过5-甲基糠醇的二聚反应开发一种增碳催化工艺，以生产C11含氧双（5-甲基呋喃-2-基）甲烷。

方法：在这项工作中，可以使用一种生态友好型氢化物聚甲基氢硅氧烷，将由糖衍生的5-甲基糠醛还原成昂贵的5-甲基糠醇，而不是Cs2CO3。在随后的增碳过程中，开发了一种固体酸性纳米催化剂3-氯吡啶磷钨酸（3-ClPYPW），可在温和反应下有​​效地将5-甲基糠醇转化为双（5-甲基呋喃-2-基）甲烷条件。

结果：使用二氯甲烷作为溶剂，在70°C的低温下11个小时内，双（5-甲基呋喃-2-基）甲烷的良好收率为51.6％。固体纳米催化剂能够重复使用至少四个周期，而催化活性没有明显损失。动力学研究证明该反应是一级反应，表观活化能（Ea）为41.10 kJ mol-1，而热力学研究证明该反应是非自发的且吸热的。

结论：在固体酸性纳米催化剂3-ClPYPW上成功开发了一种通过一锅法合成BMFM（C11含氧化合物）的新型催化途径。