Scalable synthesis of selective hydrodeoxygenation inverted Pd@TiO2 nanocatalysts
Scalable synthesis of selective hydrodeoxygenation inverted Pd@TiO2 nanocatalysts
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DOI：
10.1007/s41981-021-00171-4
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发表时间：
2021-05
影响因子：
2.7
通讯作者：
Pinaki Ranadive;Zachary Blanchette;Alexander P. Spanos;J. Medlin;N. Brunelli
中科院分区：
文献类型：
--
作者：
Pinaki Ranadive;Zachary Blanchette;Alexander P. Spanos;J. Medlin;N. Brunelli
催化纳米材料的新发展将使更可持续的工艺成为可能，前提是可以开发可扩展的合成方法。最近，由包封在具有微孔的多孔二氧化钛壳（Pd@TiO 2）中的钯纳米颗粒（Pd NPs）组成的倒置系统已经与加氢脱氧的高选择性相关联。这些催化剂目前是在低通量间歇工艺中合成的，由于大规模混合不良，因此难以规模化。混合可以通过连续喷射混合反应器来控制，该反应器先前已被证明可以产生单分散纳米材料。通过考察间歇合成过程中重要工艺参数的影响，建立了喷射混合法连续合成Pd@TiO2的新工艺。通过喷射混合合成的Pd@TiO 2被发现含有与其实验室规模的批量合成的对应物相当的微孔。使用喷射混合反应器生产的材料实现了> 99.3%的HDO产物选择性（即，甲苯）上的脱羰产物（苯）。总的来说，这些结果表明，连续喷射混合反应器是一种有前途的技术，可用于选择性Pd@TiO2纳米催化剂的规模化生产。
Novel developments in catalytic nanomaterials will enable more sustainable processes provided that scalable synthetic methods can be developed. Recently, inverted systems consisting of palladium nanoparticles (Pd NPs) encapsulated in a porous titania shell (Pd@TiO2) that has micropores have been associated with high selectivity for hydrodeoxygenation. These catalysts are currently synthesized in low-throughput batch processes that can be difficult to scale because of poor mixing at large scales. Mixing can be controlled through a continuous jet-mixing reactor that has been previously demonstrated to produce monodisperse nanomaterials. A jet-mixing process is developed for continuous Pd@TiO2synthesis by evaluating the effect of important synthesis parameters in batch. Pd@TiO2synthesized through jet-mixing is found to contain comparable microporosity to its lab scale batch-synthesized counterpart. The materials produced using the jet-mixing reactor achieve > 99.3 % selectivity for the HDO product (i.e., toluene) over the decarbonylation product (benzene). Overall, these results demonstrate that the continuous jet-mixing reactor is a promising technology for scalable production of selective Pd@TiO2nanocatalysts.Graphical abstract