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首页> 外文OA文献 >Membrane Reactor Based on Hybrid Nanomaterials for Process Intensification of Catalytic Hydrogenation Reaction: an Example of Reduction of the Environmental Footprint of Chemical Synthesis from a Batch to a Continuous Flow Chemistry Process
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Membrane Reactor Based on Hybrid Nanomaterials for Process Intensification of Catalytic Hydrogenation Reaction: an Example of Reduction of the Environmental Footprint of Chemical Synthesis from a Batch to a Continuous Flow Chemistry Process

机译：基于杂化纳米材料的膜反应器用于催化加氢反应的过程强化：将化学合成的环境足迹从批次减少到连续流化学过程的一个例子

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Membrane processes represent a well matured technology for water treatment with low environmental footprints compared to other type of processes. We have now combined this technology with nanomaterials, ionic liquids (negligible vapor pressure), and poly(ionic liquids) in order to enlarge the field of applications while benefiting from the advantages of membranes. We have modified flat sheet water filtration membrane and used it as both catalytic support and reactor with the advantages to make the reaction and the separation of products in only one step. For this purpose, catalytic metallic nanoparticles of palladium (diameter of ca. 2 nm) were synthesized in a gel-poly(ionic liquid) layer grafted at the surface of polymeric filtration membranes by UV-photografting method. The so obtained catalytic membrane was successfully applied in the hydrogenation of trans-4-phenyl-3-buten-2-one in forced flow-through configuration, which gave full conversion in a few seconds (2.6 s) showing advantages over the batch reactor process (in that case, palladium nanoparticles were synthesized in the ionic liquid [MMPIM][NTf2] (1,2-dimethyl-3-propylimidazolium bis-(trifluoromethylsulfonyl)imide)). Nevertheless, the catalytic membrane used in submerged mode no more prevailed over the batch reactor. Catalytic nanoparticles remain highly active in the membrane after 12 cycles of reaction without need of recuperation. Results were compared to one obtains with a similar system in batch reactor conditions, showing high efficiency of our process in term of selectivity and reactivity, combined to an important compactness, the productivity of the catalytic hollow fiber membrane reactor and permitting to operate at larger scale with promising results in an environmental friendly way in term of energy and product (metal, solvent) consuming.
机译：与其他类型的工艺相比，膜工艺代表了一种成熟的水处理技术，具有较低的环境足迹。现在，我们已将此技术与纳米材料，离子液体（可忽略不计的蒸气压）和聚（离子液体）相结合，以扩大应用领域，同时受益于膜的优势。我们已经对平板水过滤膜进行了改进，并将其用作催化载体和反应器，其优点是仅一步即可完成反应和分离产物。为此，通过紫外光接枝方法在接枝到聚合物滤膜表面的凝胶-聚（离子液体）层中合成了钯的催化金属纳米颗粒（直径约2 nm）。如此获得的催化膜成功地以强制流通的方式应用于反式4-苯基-3-丁烯-2-酮的加氢反应中，该反应膜在几秒钟（2.6 s）内即可完全转化，显示出优于间歇式反应器的优势。 （在这种情况下，钯纳米粒子是在离子液体[MMPIM] [NTf2]（1,2-二甲基-3-丙基咪唑双-（三氟甲基磺酰基）酰亚胺）中合成的）。然而，在浸没模式下使用的催化膜不再超过间歇式反应器。反应12个循环后，催化纳米颗粒在膜中保持高活性，而无需回收。将结果与在间歇反应器条件下用类似系统获得的结果进行了比较，显示了我们方法在选择性和反应性方面的高效率，同时还兼具了重要的紧凑性，中空催化膜反应器的生产率以及可以大规模运行在能源和产品（金属，溶剂）的消耗方面，以环保的方式取得了可喜的成果。

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