Abstract
A 1.0 wt% solution of histidine was gasified in supercritical water using a tubular reactor at temperature of 500-650 ℃ and pressure of 25 MPa. The gaseous product was identified and quantified by gas chromatography (GC) and the amount of organic carbon in the aqueous phase product was also determined by total organic carbon analyzer (TOC). Based on the experimental results, increasing reaction temperature led to increasing of carbon gasification efficiency, indicating the reaction rate constant following the Arrhenius equation. The carbon gasification efficiency was calculated, and reaction rate parameters were determined assuming the first-order reaction. The Arrhenius rate parameters were determined, and pre-exponential factor of 3.0×10^2 s^<-1> and activation energy of 77 kJ mol^<-1> were obtained for histidine gasification.
