Topics in Catalysis ( IF 2.8 ) Pub Date : 2021-07-20 , DOI: 10.1007/s11244-021-01470-9 Z. Moravvej 1 , F. Farshchi Tabrizi 1 , M. R. Rahimpour 1
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The main focus of this study was to exploit commercial alumina-supported catalysts for the efficient conversion of lignocellulosic-derived furfural (model compound) to value-added biofuels and chemicals. In this regard, a wide range of the catalysts including noble and non-noble metals were investigated. In a fixed-bed microreactor, vapor phase catalytic conversions were conducted in the presence of hydrogen at 225 °C and ambient pressure. In terms of reaction pathways and final product, various characteristics was observed from different catalysts, among which CoMo/Al2O3 had the highest conformity in terms of 100% selectivity toward formation of 2-methyl furan (2-MF) as the final preferred product. The decision-making criteria for catalysts’ capability were not only their conversion ability but also the reaction path. Accordingly, although the catalysts (PdAg, Ni (1), Pt and RePt (1)) showed relatively higher conversions, the reaction path demonstrated sharp affinity to decarbonylation route. In contrast, the catalysts containing Co and Mo demonstrated the best performance for the hydrodeoxygenation (HDO) of furfural to 2-MF without any side reactions. Of course, different combinations of Co and Mo ratio had a decisive role in the conversion and selectivity; while selectivity was 100% with conversion of 27.8% for CoMo (2) (3.4 wt% Co and 13.6 wt% Mo), the selectivity of 79.5% and conversion of 47.1% were for CoMo (1) (4.4 wt% Co and 7.5 wt% Mo). Finally, it seems that through optimization, it is possible to choose the appropriate catalyst from the existing and conventional ones, which depends on our goal of conversion.
Graphical Abstract
中文翻译：
在氧化铝负载的催化剂上将糠醛气相转化为有价值的生物燃料和化学品：筛选催化剂
本研究的主要重点是开发商业氧化铝负载的催化剂，用于将木质纤维素衍生的糠醛（模型化合物）有效转化为增值生物燃料和化学品。在这方面，研究了广泛的催化剂，包括贵金属和非贵金属。在固定床微型反应器中，在氢气存在下，在 225 °C 和环境压力下进行气相催化转化。在反应途径和最终产物方面，观察到不同催化剂的各种特性，其中 CoMo/Al 2 O 3在形成 2-甲基呋喃 (2-MF) 作为最终优选产物的 100% 选择性方面具有最高的一致性。催化剂能力的决策标准不仅是其转化能力，还包括反应路径。因此，尽管催化剂（PdAg、Ni（1）、Pt 和 RePt（1））显示出相对较高的转化率，但反应路径显示出对脱羰路径的强烈亲和力。相比之下，含有 Co 和 Mo 的催化剂在糠醛加氢脱氧 (HDO) 至 2-MF 方面表现出最佳性能，没有任何副反应。当然，Co和Mo比例的不同组合对转化率和选择性有决定性作用；而选择性为 100%，CoMo (2)（3.4 wt% Co 和 13.6 wt% Mo）的转化率为 27.8%，选择性为 79.5%，转化率为 47。1% 用于 CoMo (1)（4.4 wt% Co 和 7.5 wt% Mo）。最后，似乎通过优化，可以从现有的和常规的催化剂中选择合适的催化剂，这取决于我们的转化目标。
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