Analytical Sciences

Instrumentation of High Temperature and Pressure Reaction System with Continuous Flow and Its Hyphenation to a Liquid Chromatograph

Takao TSUDA,*^1,*² Shinya KITAGAWA,*¹ Takayuki UMEYAMA,*¹ Shuki ARAKI,*¹ Tsunehisa HIRASHITA,*¹ Mutumi AOKI,*³ and Koichi NAKAMURA*^3,*⁴

*1 Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
*2 Pico-Device Co., Ltd., Nagoya Life Science Incubator 109, Chikusa 2-22-8, Chikusa, Nagoya 464-0858, Japan
*3 Department of Computer Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
*4 Kaela R&D Co., Inc., Incubation Center, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan

A continuous flow-type hydrothermal reaction system, in which both temperature and pressure were rapidly and dynamically controlled, was constructed. It is called a real time high temperature and pressure reaction system (RT-HighTP). The RT-HighTP was hyphenated with liquid chromatograph (RT-HighTP-LC) to achieve prompt analysis of the reaction products. The RT-HighTP system produced stable pressure under the supercritical and subcritical phases (%RSD < 3%). The RT-HighTP-LC was able to change the hydrothermal condition rapidly. The hydrothermal products under four conditions were analyzed within 70 min. Further, the hydrothermal products of lignin was easily taken out using the sample collecting loop and analyzed by an external instrument of GC/MS.

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