The direct conversion of methane to methanol in supercritical water has been investigated over the temperature range of 400 to 450 ℃ at 250 bar. Methane was oxidized to CO, CO_2 and CH_3OH. The conversions of oxygen and methane increased as the temperature and the mean residence tiem increased. The selectivity to methanol decreased as reaction temperature increased. The highest selectivity to methanol obtained was approximately 37% at 410 ℃. It was found that in the absence of oxygen, methane was stable in the supercritical water under the experimental conditions investigated in this study.

초임계수 하에서 메탄의 메탄올로의 직접전환이 온도범위 400∼450 ℃, 압력 250 bar에서 조사되었다. 메탄 산화반응의 생성무은 CO, CO_2, CH_3OH 등이었다. 메탄과 산소의 전환은 온도와 반응시간이 증가함에 따라 증가하였다. 메탄올의 선택도는 온도가 증가할수록 감소하였고, 최대 선택도는 약 37%로 410 ℃에서 얻어졌다. 본 연구에서 조사된 실험범위에서 메탄은 초임계수 하에서 안정함을 나타내었다.