This manuscript describes the using of biosourced L-valine, oxalic acid and glyoxal to produce a biobased imidazolium hydrogen oxalate [iBu₂IM](HC₂O₄) which is converted to its related hydrogen carbonate salt by a simple electrolysis without using strong base. The addition of weak protic acids to the latter compound leads to a rapid and quantitative CO₂ release with formation of the starting hydrogen oxalate salt or a new halide free bio-based ionic liquid [iBu₂IM](AcO) which is able to adsorb reversibly the CO₂ at room temperature. The protonation reactions, combined with electrolysis, could then be a promising alternative solution for storage and transport of CO₂. They are indeed fast and use a thermally and air stable material produced from sustainable resources which are easily recycled by a low energy consuming process using non-expensive and corrosion-resistant equipment.

中文翻译：

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生物基1,3-二异丁基咪唑鎓草酸氢盐[iBu ₂ IM]（HC ₂ O ₄）作为CO ₂梭

该手稿描述了如何使用生物来源的L-缬氨酸，草酸和乙二醛生产生物基咪唑草酸氢盐[iBu ₂ IM]（HC ₂ O ₄），通过简单的电解即可将其转化为相关的碳酸氢盐，而无需使用强碱。向后一种化合物中添加弱质子酸会导致快速定量的CO ₂释放，并形成起始草酸氢盐或新的无卤化物生物基离子液体[iBu ₂ IM]（AcO），可逆的CO ₂在室温下。然后，将质子化反应与电解结合，将成为有希望的CO ₂储存和运输的替代解决方案。它们的确非常快，并且使用由可持续资源生产的热稳定和空气稳定的材料，可以使用低价且耐腐蚀的设备通过低能耗的过程轻松地对其进行回收。