Near-infrared spectroscopy as a rapid tool for water content analysis in the partial oxidation of ethanol

The oxidation of ethanol to acetaldehyde was previously investigated in a continuous flow bench scale reactor using a zirconium-oxide-supported vanadium catalyst. Products were analyzed by near-infrared spectroscopy, a fast and accurate tool for the determination of water, ethanol, and acetaldehyde content. Water content was calibrated by Karl Fischer titration while gas chromatography was used to calibrate ethanol and acetaldehyde contents. Near-infrared spectroscopy is a fast, cost-effective method for the determination of water, ethanol, and acetaldehyde products from partial ethanol oxidation.此前已有研究采用以氧化锆为载体的钒催化剂（zirconium-oxide-supported vanadium catalyst），在连续流动台式规模反应器中开展乙醇氧化制备乙醛的实验研究。实验产物通过近红外光谱（near-infrared spectroscopy）进行分析，该技术是一种用于快速精准定量检测水、乙醇及乙醛含量的分析手段。其中水含量的定量校准采用卡尔费休滴定法（Karl Fischer titration），而乙醇与乙醛含量的定量校准则通过气相色谱（gas chromatography）完成。近红外光谱法是一种快速且经济高效的分析方法，可用于乙醇部分氧化反应产物中水、乙醇及乙醛组分的定量检测。